Drop C-style 'void' argument

Marlin/src/HAL/HAL_AVR/HAL.cpp

 // Public functions
 // ------------------------
 
-void HAL_init(void) {
+void HAL_init() {
   // Init Servo Pins
   #define INIT_SERVO(N) OUT_WRITE(SERVO##N##_PIN, LOW)
   #if HAS_SERVO_0

Marlin/src/HAL/HAL_AVR/HAL.h

 // Public functions
 // ------------------------
 
-void HAL_init(void);
+void HAL_init();
 
-//void cli(void);
+//void cli();
 
 //void _delay_ms(const int delay);
 
-inline void HAL_clear_reset_source(void) { MCUSR = 0; }
-inline uint8_t HAL_get_reset_source(void) { return MCUSR; }
+inline void HAL_clear_reset_source() { MCUSR = 0; }
+inline uint8_t HAL_get_reset_source() { return MCUSR; }
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
 extern "C" {
-  int freeMemory(void);
+  int freeMemory();
 }
 #pragma GCC diagnostic pop
 
 
 /* 18 cycles maximum latency */
 #define HAL_STEP_TIMER_ISR() \
-extern "C" void TIMER1_COMPA_vect(void) __attribute__ ((signal, naked, used, externally_visible)); \
-extern "C" void TIMER1_COMPA_vect_bottom(void) asm ("TIMER1_COMPA_vect_bottom") __attribute__ ((used, externally_visible, noinline)); \
-void TIMER1_COMPA_vect(void) { \
+extern "C" void TIMER1_COMPA_vect() __attribute__ ((signal, naked, used, externally_visible)); \
+extern "C" void TIMER1_COMPA_vect_bottom() asm ("TIMER1_COMPA_vect_bottom") __attribute__ ((used, externally_visible, noinline)); \
+void TIMER1_COMPA_vect() { \
   __asm__ __volatile__ ( \
     A("push r16")                      /* 2 Save R16 */ \
     A("in r16, __SREG__")              /* 1 Get SREG */ \
     : \
   ); \
 } \
-void TIMER1_COMPA_vect_bottom(void)
+void TIMER1_COMPA_vect_bottom()
 
 /* 14 cycles maximum latency */
 #define HAL_TEMP_TIMER_ISR() \
-extern "C" void TIMER0_COMPB_vect(void) __attribute__ ((signal, naked, used, externally_visible)); \
-extern "C" void TIMER0_COMPB_vect_bottom(void)  asm ("TIMER0_COMPB_vect_bottom") __attribute__ ((used, externally_visible, noinline)); \
-void TIMER0_COMPB_vect(void) { \
+extern "C" void TIMER0_COMPB_vect() __attribute__ ((signal, naked, used, externally_visible)); \
+extern "C" void TIMER0_COMPB_vect_bottom()  asm ("TIMER0_COMPB_vect_bottom") __attribute__ ((used, externally_visible, noinline)); \
+void TIMER0_COMPB_vect() { \
   __asm__ __volatile__ ( \
     A("push r16")                       /* 2 Save R16 */ \
     A("in r16, __SREG__")               /* 1 Get SREG */ \
     : \
   ); \
 } \
-void TIMER0_COMPB_vect_bottom(void)
+void TIMER0_COMPB_vect_bottom()
 
 // ADC
 #ifdef DIDR2
   #define HAL_ANALOG_SELECT(pin) do{ SBI(DIDR0, pin); }while(0)
 #endif
 
-inline void HAL_adc_init(void) {
+inline void HAL_adc_init() {
   ADCSRA = _BV(ADEN) | _BV(ADSC) | _BV(ADIF) | 0x07;
   DIDR0 = 0;
   #ifdef DIDR2

Marlin/src/HAL/HAL_AVR/HAL_SPI.cpp

 
 #include "../../inc/MarlinConfig.h"
 
-void spiBegin(void) {
+void spiBegin() {
   OUT_WRITE(SS_PIN, HIGH);
   SET_OUTPUT(SCK_PIN);
   SET_INPUT(MISO_PIN);
   }
 
   /** SPI receive a byte */
-  uint8_t spiRec(void) {
+  uint8_t spiRec() {
     SPDR = 0xFF;
     while (!TEST(SPSR, SPIF)) { /* Intentionally left empty */ }
     return SPDR;

Marlin/src/HAL/HAL_AVR/MarlinSerial.cpp

 
   // (called with TX irqs disabled)
   template<typename Cfg>
-  FORCE_INLINE void MarlinSerial<Cfg>::_tx_udr_empty_irq(void) {
+  FORCE_INLINE void MarlinSerial<Cfg>::_tx_udr_empty_irq() {
     if (Cfg::TX_SIZE > 0) {
       // Read positions
       uint8_t t = tx_buffer.tail;
   }
 
   template<typename Cfg>
-  int MarlinSerial<Cfg>::peek(void) {
+  int MarlinSerial<Cfg>::peek() {
     const ring_buffer_pos_t h = atomic_read_rx_head(), t = rx_buffer.tail;
     return h == t ? -1 : rx_buffer.buffer[t];
   }
 
   template<typename Cfg>
-  int MarlinSerial<Cfg>::read(void) {
+  int MarlinSerial<Cfg>::read() {
     const ring_buffer_pos_t h = atomic_read_rx_head();
 
     // Read the tail. Main thread owns it, so it is safe to directly read it
   }
 
   template<typename Cfg>
-  typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::available(void) {
+  typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::available() {
     const ring_buffer_pos_t h = atomic_read_rx_head(), t = rx_buffer.tail;
     return (ring_buffer_pos_t)(Cfg::RX_SIZE + h - t) & (Cfg::RX_SIZE - 1);
   }
 
   template<typename Cfg>
-  void MarlinSerial<Cfg>::flush(void) {
+  void MarlinSerial<Cfg>::flush() {
 
     // Set the tail to the head:
     //  - Read the RX head index in a safe way. (See atomic_read_rx_head.)
   }
 
   template<typename Cfg>
-  void MarlinSerial<Cfg>::flushTX(void) {
+  void MarlinSerial<Cfg>::flushTX() {
 
     if (Cfg::TX_SIZE == 0) {
       // No bytes written, no need to flush. This special case is needed since there's
   }
 
   template<typename Cfg>
-  void MarlinSerial<Cfg>::println(void) {
+  void MarlinSerial<Cfg>::println() {
     print('\r');
     print('\n');
   }

Marlin/src/HAL/HAL_AVR/MarlinSerial.h

     public:
 
     FORCE_INLINE static void store_rxd_char();
-    FORCE_INLINE static void _tx_udr_empty_irq(void);
+    FORCE_INLINE static void _tx_udr_empty_irq();
 
     public:
       MarlinSerial() {};
       static void begin(const long);
       static void end();
-      static int peek(void);
-      static int read(void);
-      static void flush(void);
-      static ring_buffer_pos_t available(void);
+      static int peek();
+      static int read();
+      static void flush();
+      static ring_buffer_pos_t available();
       static void write(const uint8_t c);
-      static void flushTX(void);
+      static void flushTX();
 
       FORCE_INLINE static uint8_t dropped() { return Cfg::DROPPED_RX ? rx_dropped_bytes : 0; }
       FORCE_INLINE static uint8_t buffer_overruns() { return Cfg::RX_OVERRUNS ? rx_buffer_overruns : 0; }
       static void println(long, int = DEC);
       static void println(unsigned long, int = DEC);
       static void println(double, int = 2);
-      static void println(void);
+      static void println();
       operator bool() { return true; }
 
     private:

Marlin/src/HAL/HAL_AVR/endstop_interrupts.h

 #include <stdint.h>
 
 // One ISR for all EXT-Interrupts
-void endstop_ISR(void) { endstops.update(); }
+void endstop_ISR() { endstops.update(); }
 
 /**
  * Patch for pins_arduino.h (...\Arduino\hardware\arduino\avr\variants\mega\pins_arduino.h)
   ISR(PCINT3_vect, ISR_ALIASOF(PCINT0_vect));
 #endif
 
-void setup_endstop_interrupts(void) {
+void setup_endstop_interrupts() {
   #define _ATTACH(P) attachInterrupt(digitalPinToInterrupt(P), endstop_ISR, CHANGE)
   #if HAS_X_MAX
     #if (digitalPinToInterrupt(X_MAX_PIN) != NOT_AN_INTERRUPT)

Marlin/src/HAL/HAL_DUE/DebugMonitor.cpp

 #define sw_barrier() __asm__ volatile("": : :"memory");
 
 // (re)initialize UART0 as a monitor output to 250000,n,8,1
-static void TXBegin(void) {
+static void TXBegin() {
 
   // Disable UART interrupt in NVIC
   NVIC_DisableIRQ( UART_IRQn );
   for (;;) WDT_Restart(WDT);
 }
 
-__attribute__((naked)) void NMI_Handler(void) {
+__attribute__((naked)) void NMI_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void HardFault_Handler(void) {
+__attribute__((naked)) void HardFault_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void MemManage_Handler(void) {
+__attribute__((naked)) void MemManage_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void BusFault_Handler(void) {
+__attribute__((naked)) void BusFault_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void UsageFault_Handler(void) {
+__attribute__((naked)) void UsageFault_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void DebugMon_Handler(void) {
+__attribute__((naked)) void DebugMon_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
 }
 
 /* This is NOT an exception, it is an interrupt handler - Nevertheless, the framing is the same */
-__attribute__((naked)) void WDT_Handler(void) {
+__attribute__((naked)) void WDT_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void RSTC_Handler(void) {
+__attribute__((naked)) void RSTC_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")

Marlin/src/HAL/HAL_DUE/EepromEmulation.cpp

   }
 }
 
-void eeprom_flush(void) {
+void eeprom_flush() {
   ee_Flush();
 }
 

Marlin/src/HAL/HAL_DUE/HAL.cpp

 // ------------------------
 
 // HAL initialization task
-void HAL_init(void) {
+void HAL_init() {
   // Initialize the USB stack
   #if ENABLED(SDSUPPORT)
     OUT_WRITE(SDSS, HIGH);  // Try to set SDSS inactive before any other SPI users start up
 }
 
 // HAL idle task
-void HAL_idletask(void) {
+void HAL_idletask() {
   // Perform USB stack housekeeping
   usb_task_idle();
 }
 
 // Disable interrupts
-void cli(void) { noInterrupts(); }
+void cli() { noInterrupts(); }
 
 // Enable interrupts
-void sei(void) { interrupts(); }
+void sei() { interrupts(); }
 
-void HAL_clear_reset_source(void) { }
+void HAL_clear_reset_source() { }
 
-uint8_t HAL_get_reset_source(void) {
+uint8_t HAL_get_reset_source() {
   switch ((RSTC->RSTC_SR >> 8) & 0x07) {
     case 0: return RST_POWER_ON;
     case 1: return RST_BACKUP;
   HAL_adc_result = analogRead(adc_pin);
 }
 
-uint16_t HAL_adc_get_result(void) {
+uint16_t HAL_adc_get_result() {
   // nop
   return HAL_adc_result;
 }

Marlin/src/HAL/HAL_DUE/HAL.h

 #define ENABLE_ISRS()  __enable_irq()
 #define DISABLE_ISRS() __disable_irq()
 
-void cli(void);                     // Disable interrupts
-void sei(void);                     // Enable interrupts
+void cli();                     // Disable interrupts
+void sei();                     // Enable interrupts
 
-void HAL_clear_reset_source(void);  // clear reset reason
-uint8_t HAL_get_reset_source(void); // get reset reason
+void HAL_clear_reset_source();  // clear reset reason
+uint8_t HAL_get_reset_source(); // get reset reason
 
 //
 // EEPROM
 
 #define HAL_ANALOG_SELECT(pin)
 
-inline void HAL_adc_init(void) {}//todo
+inline void HAL_adc_init() {}//todo
 
 #define HAL_START_ADC(pin)  HAL_adc_start_conversion(pin)
 #define HAL_READ_ADC()      HAL_adc_result
 #define HAL_ADC_READY()     true
 
 void HAL_adc_start_conversion(const uint8_t adc_pin);
-uint16_t HAL_adc_get_result(void);
+uint16_t HAL_adc_get_result();
 
 //
 // Pin Map
 
 // Enable hooks into idle and setup for HAL
 #define HAL_IDLETASK 1
-void HAL_idletask(void);
-void HAL_init(void);
+void HAL_idletask();
+void HAL_init();
 
 //
 // Utility functions
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
-int freeMemory(void);
+int freeMemory();
 #pragma GCC diagnostic pop
 
 #ifdef __cplusplus

Marlin/src/HAL/HAL_DUE/InterruptVectors.cpp

  * If it is not, then it copies the ROM table to the SRAM and relocates the table
  * by reprogramming the NVIC registers
  */
-static pfnISR_Handler* get_relocated_table_addr(void) {
+static pfnISR_Handler* get_relocated_table_addr() {
   // Get the address of the interrupt/exception table
   uint32_t isrtab = SCB->VTOR;
 

Marlin/src/HAL/HAL_DUE/InterruptVectors.h

 #ifdef ARDUINO_ARCH_SAM
 
 // ISR handler type
-typedef void (*pfnISR_Handler)(void);
+typedef void (*pfnISR_Handler)();
 
 // Install a new interrupt vector handler for the given irq, returning the old one
 pfnISR_Handler install_isr(IRQn_Type irq, pfnISR_Handler newHandler);

Marlin/src/HAL/HAL_DUE/MarlinSerial.cpp

 }
 
 template<typename Cfg>
-FORCE_INLINE void MarlinSerial<Cfg>::_tx_thr_empty_irq(void) {
+FORCE_INLINE void MarlinSerial<Cfg>::_tx_thr_empty_irq() {
   if (Cfg::TX_SIZE > 0) {
     // Read positions
     uint8_t t = tx_buffer.tail;
 }
 
 template<typename Cfg>
-void MarlinSerial<Cfg>::UART_ISR(void) {
+void MarlinSerial<Cfg>::UART_ISR() {
   const uint32_t status = HWUART->UART_SR;
 
   // Data received?
 }
 
 template<typename Cfg>
-int MarlinSerial<Cfg>::peek(void) {
+int MarlinSerial<Cfg>::peek() {
   const int v = rx_buffer.head == rx_buffer.tail ? -1 : rx_buffer.buffer[rx_buffer.tail];
   return v;
 }
 
 template<typename Cfg>
-int MarlinSerial<Cfg>::read(void) {
+int MarlinSerial<Cfg>::read() {
 
   const ring_buffer_pos_t h = rx_buffer.head;
   ring_buffer_pos_t t = rx_buffer.tail;
 }
 
 template<typename Cfg>
-typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::available(void) {
+typename MarlinSerial<Cfg>::ring_buffer_pos_t MarlinSerial<Cfg>::available() {
   const ring_buffer_pos_t h = rx_buffer.head, t = rx_buffer.tail;
   return (ring_buffer_pos_t)(Cfg::RX_SIZE + h - t) & (Cfg::RX_SIZE - 1);
 }
 
 template<typename Cfg>
-void MarlinSerial<Cfg>::flush(void) {
+void MarlinSerial<Cfg>::flush() {
   rx_buffer.tail = rx_buffer.head;
 
   if (Cfg::XONOFF) {
 }
 
 template<typename Cfg>
-void MarlinSerial<Cfg>::flushTX(void) {
+void MarlinSerial<Cfg>::flushTX() {
   // TX
 
   if (Cfg::TX_SIZE == 0) {
 }
 
 template<typename Cfg>
-void MarlinSerial<Cfg>::println(void) {
+void MarlinSerial<Cfg>::println() {
   print('\r');
   print('\n');
 }

Marlin/src/HAL/HAL_DUE/MarlinSerial.h

   static ring_buffer_pos_t rx_max_enqueued;
 
   FORCE_INLINE static void store_rxd_char();
-  FORCE_INLINE static void _tx_thr_empty_irq(void);
-  static void UART_ISR(void);
+  FORCE_INLINE static void _tx_thr_empty_irq();
+  static void UART_ISR();
 
 public:
   MarlinSerial() {};
   static void begin(const long);
   static void end();
-  static int peek(void);
-  static int read(void);
-  static void flush(void);
-  static ring_buffer_pos_t available(void);
+  static int peek();
+  static int read();
+  static void flush();
+  static ring_buffer_pos_t available();
   static void write(const uint8_t c);
-  static void flushTX(void);
+  static void flushTX();
 
   FORCE_INLINE static uint8_t dropped() { return Cfg::DROPPED_RX ? rx_dropped_bytes : 0; }
   FORCE_INLINE static uint8_t buffer_overruns() { return Cfg::RX_OVERRUNS ? rx_buffer_overruns : 0; }
   static void println(long, int = DEC);
   static void println(unsigned long, int = DEC);
   static void println(double, int = 2);
-  static void println(void);
+  static void println();
   operator bool() { return true; }
 
 private:

Marlin/src/HAL/HAL_DUE/MarlinSerialUSB.cpp

 
 // Imports from Atmel USB Stack/CDC implementation
 extern "C" {
-  bool usb_task_cdc_isenabled(void);
-  bool usb_task_cdc_dtr_active(void);
-  bool udi_cdc_is_rx_ready(void);
-  int udi_cdc_getc(void);
-  bool udi_cdc_is_tx_ready(void);
+  bool usb_task_cdc_isenabled();
+  bool usb_task_cdc_dtr_active();
+  bool udi_cdc_is_rx_ready();
+  int udi_cdc_getc();
+  bool udi_cdc_is_tx_ready();
   int udi_cdc_putc(int value);
 };
 
 void MarlinSerialUSB::end() {
 }
 
-int MarlinSerialUSB::peek(void) {
+int MarlinSerialUSB::peek() {
   if (pending_char >= 0)
     return pending_char;
 
   return pending_char;
 }
 
-int MarlinSerialUSB::read(void) {
+int MarlinSerialUSB::read() {
   if (pending_char >= 0) {
     int ret = pending_char;
     pending_char = -1;
   return c;
 }
 
-bool MarlinSerialUSB::available(void) {
+bool MarlinSerialUSB::available() {
     /* If Pending chars */
   return pending_char >= 0 ||
     /* or USB CDC enumerated and configured on the PC side and some
       (usb_task_cdc_isenabled() && udi_cdc_is_rx_ready());
 }
 
-void MarlinSerialUSB::flush(void) { }
-void MarlinSerialUSB::flushTX(void) { }
+void MarlinSerialUSB::flush() { }
+void MarlinSerialUSB::flushTX() { }
 
 void MarlinSerialUSB::write(const uint8_t c) {
 
   printFloat(n, digits);
 }
 
-void MarlinSerialUSB::println(void) {
+void MarlinSerialUSB::println() {
   print('\r');
   print('\n');
 }

Marlin/src/HAL/HAL_DUE/MarlinSerialUSB.h

   MarlinSerialUSB() {};
   static void begin(const long);
   static void end();
-  static int peek(void);
-  static int read(void);
-  static void flush(void);
-  static void flushTX(void);
-  static bool available(void);
+  static int peek();
+  static int read();
+  static void flush();
+  static void flushTX();
+  static bool available();
   static void write(const uint8_t c);
 
   #if ENABLED(SERIAL_STATS_DROPPED_RX)
   static void println(long, int = DEC);
   static void println(unsigned long, int = DEC);
   static void println(double, int = 2);
-  static void println(void);
+  static void println();
   operator bool() { return true; }
 
 private:

Marlin/src/HAL/HAL_DUE/Servo.cpp

 void Servo_Handler(timer16_Sequence_t timer, Tc *pTc, uint8_t channel);
 
 #ifdef _useTimer1
-  void HANDLER_FOR_TIMER1(void) { Servo_Handler(_timer1, TC_FOR_TIMER1, CHANNEL_FOR_TIMER1); }
+  void HANDLER_FOR_TIMER1() { Servo_Handler(_timer1, TC_FOR_TIMER1, CHANNEL_FOR_TIMER1); }
 #endif
 #ifdef _useTimer2
-  void HANDLER_FOR_TIMER2(void) { Servo_Handler(_timer2, TC_FOR_TIMER2, CHANNEL_FOR_TIMER2); }
+  void HANDLER_FOR_TIMER2() { Servo_Handler(_timer2, TC_FOR_TIMER2, CHANNEL_FOR_TIMER2); }
 #endif
 #ifdef _useTimer3
-  void HANDLER_FOR_TIMER3(void) { Servo_Handler(_timer3, TC_FOR_TIMER3, CHANNEL_FOR_TIMER3); }
+  void HANDLER_FOR_TIMER3() { Servo_Handler(_timer3, TC_FOR_TIMER3, CHANNEL_FOR_TIMER3); }
 #endif
 #ifdef _useTimer4
-  void HANDLER_FOR_TIMER4(void) { Servo_Handler(_timer4, TC_FOR_TIMER4, CHANNEL_FOR_TIMER4); }
+  void HANDLER_FOR_TIMER4() { Servo_Handler(_timer4, TC_FOR_TIMER4, CHANNEL_FOR_TIMER4); }
 #endif
 #ifdef _useTimer5
-  void HANDLER_FOR_TIMER5(void) { Servo_Handler(_timer5, TC_FOR_TIMER5, CHANNEL_FOR_TIMER5); }
+  void HANDLER_FOR_TIMER5() { Servo_Handler(_timer5, TC_FOR_TIMER5, CHANNEL_FOR_TIMER5); }
 #endif
 
 void Servo_Handler(timer16_Sequence_t timer, Tc *tc, uint8_t channel) {

Marlin/src/HAL/HAL_DUE/endstop_interrupts.h

 #include "../../module/endstops.h"
 
 // One ISR for all EXT-Interrupts
-void endstop_ISR(void) { endstops.update(); }
+void endstop_ISR() { endstops.update(); }
 
 /**
  *  Endstop interrupts for Due based targets.
  *  On Due, all pins support external interrupt capability.
  */
 
-void setup_endstop_interrupts(void) {
+void setup_endstop_interrupts() {
   #define _ATTACH(P) attachInterrupt(digitalPinToInterrupt(P), endstop_ISR, CHANGE)
   #if HAS_X_MAX
     _ATTACH(X_MAX_PIN);

Marlin/src/HAL/HAL_DUE/persistent_store_eeprom.cpp

   #define E2END 0xFFF // Default to Flash emulated EEPROM size (EepromEmulation_Due.cpp)
 #endif
 
-extern void eeprom_flush(void);
+extern void eeprom_flush();
 
 bool PersistentStore::access_start() { return true; }
 

Marlin/src/HAL/HAL_DUE/usb/compiler.h

 	}
 #  endif
 #else
-#  define Assert(expr) ((void) 0)
+#  define Assert(expr) (() 0)
 #endif
 
 /* Define WEAK attribute */
  *
  * \note It may be used as a long jump opcode in some special cases.
  */
-#define Long_call(addr)                   ((*(void (*)(void))(addr))())
+#define Long_call(addr)                   ((*(void (*)())(addr))())
 
 
 /*! \name MCU Endianism Handling

Marlin/src/HAL/HAL_DUE/usb/ctrl_access.c

 //! LUN descriptor table.
 static const struct
 {
-  Ctrl_status (*test_unit_ready)(void);
+  Ctrl_status (*test_unit_ready)();
   Ctrl_status (*read_capacity)(U32 *);
   bool (*unload)(bool);
-  bool (*wr_protect)(void);
-  bool (*removal)(void);
+  bool (*wr_protect)();
+  bool (*removal)();
 #if ACCESS_USB == true
   Ctrl_status (*usb_read_10)(U32, U16);
   Ctrl_status (*usb_write_10)(U32, U16);
 
 #ifdef FREERTOS_USED
 
-bool ctrl_access_init(void)
+bool ctrl_access_init()
 {
   // If the handle to the protecting semaphore is not valid,
   if (!ctrl_access_semphr)
  *
  * \return \c true if the access was successfully locked, else \c false.
  */
-static bool ctrl_access_lock(void)
+static bool ctrl_access_lock()
 {
   // If the semaphore could not be created, there is no backup solution.
   if (!ctrl_access_semphr) return false;
 #endif  // FREERTOS_USED
 
 
-U8 get_nb_lun(void)
+U8 get_nb_lun()
 {
 #if MEM_USB == ENABLE
 #  ifndef Lun_usb_get_lun
 }
 
 
-U8 get_cur_lun(void)
+U8 get_cur_lun()
 {
   return LUN_ID_0;
 }

Marlin/src/HAL/HAL_DUE/usb/ctrl_access.h

  *
  * \return \c true if the locker was successfully initialized, else \c false.
  */
-extern bool ctrl_access_init(void);
+extern bool ctrl_access_init();
 
 #endif  // FREERTOS_USED
 
  *
  * \return Number of LUNs in the system.
  */
-extern U8 get_nb_lun(void);
+extern U8 get_nb_lun();
 
 /*! \brief Returns the current LUN.
  *
  *
  * \todo Implement.
  */
-extern U8 get_cur_lun(void);
+extern U8 get_cur_lun();
 
 /*! \brief Tests the memory state and initializes the memory if required.
  *

Marlin/src/HAL/HAL_DUE/usb/sd_mmc_spi_mem.cpp

 
 #define SD_MMC_BLOCK_SIZE 512
 
-void sd_mmc_spi_mem_init(void) {
+void sd_mmc_spi_mem_init() {
 }
 
-Ctrl_status sd_mmc_spi_test_unit_ready(void) {
+Ctrl_status sd_mmc_spi_test_unit_ready() {
   if (!IS_SD_INSERTED() || IS_SD_PRINTING() || IS_SD_FILE_OPEN() || !card.isMounted())
     return CTRL_NO_PRESENT;
   return CTRL_GOOD;
   return true;
 }
 
-bool sd_mmc_spi_wr_protect(void) {
+bool sd_mmc_spi_wr_protect() {
   return false;
 }
 
-bool sd_mmc_spi_removal(void) {
+bool sd_mmc_spi_removal() {
   if (!IS_SD_INSERTED() || IS_SD_PRINTING() || IS_SD_FILE_OPEN() || !card.isMounted())
     return true;
   return false;

Marlin/src/HAL/HAL_DUE/usb/sd_mmc_spi_mem.h

 //!
 //! @brief This function initializes the hw/sw resources required to drive the SD_MMC_SPI.
 //!/
-extern void           sd_mmc_spi_mem_init(void);
+extern void           sd_mmc_spi_mem_init();
 
 //!
 //! @brief This function tests the state of the SD_MMC memory and sends it to the Host.
 //!   Media not present    ->    CTRL_NO_PRESENT
 //!   Media has changed    ->    CTRL_BUSY
 //!/
-extern Ctrl_status    sd_mmc_spi_test_unit_ready(void);
+extern Ctrl_status    sd_mmc_spi_test_unit_ready();
 
 //!
 //! @brief This function gives the address of the last valid sector.
 //!
 //! @return false  -> the memory is not write-protected (always)
 //!/
-extern bool           sd_mmc_spi_wr_protect(void);
+extern bool           sd_mmc_spi_wr_protect();
 
 //!
 //! @brief This function tells if the memory has been removed or not.
 //!
 //! @return false  -> The memory isn't removed
 //!
-extern bool           sd_mmc_spi_removal(void);
+extern bool           sd_mmc_spi_removal();
 
 
 //---- ACCESS DATA FONCTIONS ----

Marlin/src/HAL/HAL_DUE/usb/sysclk.c

  * \param pll_id Source of the USB clock.
  * \param div Actual clock divisor. Must be superior to 0.
  */
-void sysclk_enable_usb(void)
+void sysclk_enable_usb()
 {
 	Assert(CONFIG_USBCLK_DIV > 0);
 
  *
  * \note This implementation does not switch off the PLL, it just turns off the USB clock.
  */
-void sysclk_disable_usb(void)
+void sysclk_disable_usb()
 {
 	pmc_disable_udpck();
 }

Marlin/src/HAL/HAL_DUE/usb/sysclk.h

 #endif
 
 
-extern void sysclk_enable_usb(void);
-extern void sysclk_disable_usb(void);
+extern void sysclk_enable_usb();
+extern void sysclk_disable_usb();
 
 //! @}
 

Marlin/src/HAL/HAL_DUE/usb/udc.c

  * define USB_DEVICE_GET_SERIAL_NAME_LENGTH.
  */
 #if defined USB_DEVICE_GET_SERIAL_NAME_POINTER
-	static const uint8_t *udc_get_string_serial_name(void)
+	static const uint8_t *udc_get_string_serial_name()
 	{
 		return (const uint8_t *)USB_DEVICE_GET_SERIAL_NAME_POINTER;
 	}
 #  define USB_DEVICE_SERIAL_NAME_SIZE \
 	USB_DEVICE_GET_SERIAL_NAME_LENGTH
 #elif defined USB_DEVICE_SERIAL_NAME
-	static const uint8_t *udc_get_string_serial_name(void)
+	static const uint8_t *udc_get_string_serial_name()
 	{
 		return (const uint8_t *)USB_DEVICE_SERIAL_NAME;
 	}
 };
 //! @}
 
-usb_iface_desc_t UDC_DESC_STORAGE *udc_get_interface_desc(void)
+usb_iface_desc_t UDC_DESC_STORAGE *udc_get_interface_desc()
 {
 	return udc_ptr_iface;
 }
  *
  * \return address after the last byte of USB Configuration descriptor
  */
-static usb_conf_desc_t UDC_DESC_STORAGE *udc_get_eof_conf(void)
+static usb_conf_desc_t UDC_DESC_STORAGE *udc_get_eof_conf()
 {
 	return (UDC_DESC_STORAGE usb_conf_desc_t *) ((uint8_t *)
 			udc_ptr_conf->desc +
 
 /*! \brief Start the USB Device stack
  */
-void udc_start(void)
+void udc_start()
 {
 	udd_enable();
 }
 
 /*! \brief Stop the USB Device stack
  */
-void udc_stop(void)
+void udc_stop()
 {
 	udd_disable();
 	udc_reset();
  * \brief Reset the current configuration of the USB device,
  * This routines can be called by UDD when a RESET on the USB line occurs.
  */
-void udc_reset(void)
+void udc_reset()
 {
 	uint8_t iface_num;
 
 #endif
 }
 
-void udc_sof_notify(void)
+void udc_sof_notify()
 {
 	uint8_t iface_num;
 
  *
  * \return true if success
  */
-static bool udc_req_std_dev_get_status(void)
+static bool udc_req_std_dev_get_status()
 {
 	if (udd_g_ctrlreq.req.wLength != sizeof(udc_device_status)) {
 		return false;
  *
  * \return true if success
  */
-static bool udc_req_std_ep_get_status(void)
+static bool udc_req_std_ep_get_status()
 {
 	static le16_t udc_ep_status;
 
  *
  * \return true if success
  */
-static bool udc_req_std_dev_clear_feature(void)
+static bool udc_req_std_dev_clear_feature()
 {
 	if (udd_g_ctrlreq.req.wLength) {
 		return false;
  *
  * \return true if success
  */
-static bool udc_req_std_ep_clear_feature(void)
+static bool udc_req_std_ep_clear_feature()
 {
 	if (udd_g_ctrlreq.req.wLength) {
 		return false;
  *
  * \return true if success
  */
-static bool udc_req_std_dev_set_feature(void)
+static bool udc_req_std_dev_set_feature()
 {
 	if (udd_g_ctrlreq.req.wLength) {
 		return false;
  * \return true if success
  */
 #if (0!=USB_DEVICE_MAX_EP)
-static bool udc_req_std_ep_set_feature(void)
+static bool udc_req_std_ep_set_feature()
 {
 	if (udd_g_ctrlreq.req.wLength) {
 		return false;
  * \brief Change the address of device
  * Callback called at the end of request set address
  */
-static void udc_valid_address(void)
+static void udc_valid_address()
 {
 	udd_set_address(udd_g_ctrlreq.req.wValue & 0x7F);
 }
  *
  * \return true if success
  */
-static bool udc_req_std_dev_set_address(void)
+static bool udc_req_std_dev_set_address()
 {
 	if (udd_g_ctrlreq.req.wLength) {
 		return false;
  *
  * \return true if success
  */
-static bool udc_req_std_dev_get_str_desc(void)
+static bool udc_req_std_dev_get_str_desc()
 {
 	uint8_t i;
 	const uint8_t *str;
  *
  * \return true if success
  */
-static bool udc_req_std_dev_get_descriptor(void)
+static bool udc_req_std_dev_get_descriptor()
 {
 	uint8_t conf_num;
 
  *
  * \return true if success
  */
-static bool udc_req_std_dev_get_configuration(void)
+static bool udc_req_std_dev_get_configuration()
 {
 	if (udd_g_ctrlreq.req.wLength != 1) {
 		return false;
  *
  * \return true if success
  */
-static bool udc_req_std_dev_set_configuration(void)
+static bool udc_req_std_dev_set_configuration()
 {
 	uint8_t iface_num;
 
  *
  * \return true if success
  */
-static bool udc_req_std_iface_get_setting(void)
+static bool udc_req_std_iface_get_setting()
 {
 	uint8_t iface_num;
 	udi_api_t UDC_DESC_STORAGE *udi_api;
  *
  * \return true if success
  */
-static bool udc_req_std_iface_set_setting(void)
+static bool udc_req_std_iface_set_setting()
 {
 	uint8_t iface_num, setting_num;
 
  *
  * \return true if the request is supported
  */
-static bool udc_reqstd(void)
+static bool udc_reqstd()
 {
 	if (Udd_setup_is_in()) {
 		// GET Standard Requests
  *
  * \return true if the request is supported
  */
-static bool udc_req_iface(void)
+static bool udc_req_iface()
 {
 	uint8_t iface_num;
 	udi_api_t UDC_DESC_STORAGE *udi_api;
  *
  * \return true if the request is supported
  */
-static bool udc_req_ep(void)
+static bool udc_req_ep()
 {
 	uint8_t iface_num;
 	udi_api_t UDC_DESC_STORAGE *udi_api;
  *
  * \return true if the request is supported, else the request is stalled by UDD
  */
-bool udc_process_setup(void)
+bool udc_process_setup()
 {
 	// By default no data (receive/send) and no callbacks registered
 	udd_g_ctrlreq.payload_size = 0;

Marlin/src/HAL/HAL_DUE/usb/udc.h

 	}
 \endcode
  */
-static inline bool udc_include_vbus_monitoring(void)
+static inline bool udc_include_vbus_monitoring()
 {
 	return udd_include_vbus_monitoring();
 }
 
 /*! \brief Start the USB Device stack
  */
-void udc_start(void);
+void udc_start();
 
 /*! \brief Stop the USB Device stack
  */
-void udc_stop(void);
+void udc_stop();
 
 /**
  * \brief Attach device to the bus when possible
  * then it will attach device when an acceptable Vbus
  * level from the host is detected.
  */
-static inline void udc_attach(void)
+static inline void udc_attach()
 {
 	udd_attach();
 }
  *
  * The driver must remove pull-up on USB line D- or D+.
  */
-static inline void udc_detach(void)
+static inline void udc_detach()
 {
 	udd_detach();
 }
 /*! \brief The USB driver sends a resume signal called \e "Upstream Resume"
  * This is authorized only when the remote wakeup feature is enabled by host.
  */
-static inline void udc_remotewakeup(void)
+static inline void udc_remotewakeup()
 {
 	udd_send_remotewakeup();
 }
  *
  * \return pointer on the current interface descriptor.
  */
-usb_iface_desc_t UDC_DESC_STORAGE *udc_get_interface_desc(void);
+usb_iface_desc_t UDC_DESC_STORAGE *udc_get_interface_desc();
 
 //@}
 
  *
  * Add to application C-file:
  * \code
-	void usb_init(void)
+	void usb_init()
 	{
 	  udc_start();
 	}
 	#define  USB_DEVICE_ATTR \
 	  (USB_CONFIG_ATTR_REMOTE_WAKEUP | USB_CONFIG_ATTR_..._POWERED)
 	#define UDC_REMOTEWAKEUP_ENABLE() my_callback_remotewakeup_enable()
-	extern void my_callback_remotewakeup_enable(void);
+	extern void my_callback_remotewakeup_enable();
 	#define UDC_REMOTEWAKEUP_DISABLE() my_callback_remotewakeup_disable()
-	extern void my_callback_remotewakeup_disable(void);
+	extern void my_callback_remotewakeup_disable();
 \endcode
  *
  * Add to application C-file:
  * \code
-	 void my_callback_remotewakeup_enable(void)
+	 void my_callback_remotewakeup_enable()
 	 {
 	    // Enable application wakeup events (e.g. enable GPIO interrupt)
 	 }
-	 void my_callback_remotewakeup_disable(void)
+	 void my_callback_remotewakeup_disable()
 	 {
 	    // Disable application wakeup events (e.g. disable GPIO interrupt)
 	 }
 
-	 void my_interrupt_event(void)
+	 void my_interrupt_event()
 	 {
 	    udc_remotewakeup();
 	 }
 	     #define  USB_DEVICE_ATTR (USB_CONFIG_ATTR_REMOTE_WAKEUP | USB_CONFIG_ATTR_..._POWERED) \endcode
  *   - \code // Define callback called when the host enables the remotewakeup feature
 	#define UDC_REMOTEWAKEUP_ENABLE() my_callback_remotewakeup_enable()
-	extern void my_callback_remotewakeup_enable(void); \endcode
+	extern void my_callback_remotewakeup_enable(); \endcode
  *   - \code // Define callback called when the host disables the remotewakeup feature
 	#define UDC_REMOTEWAKEUP_DISABLE() my_callback_remotewakeup_disable()
-	extern void my_callback_remotewakeup_disable(void); \endcode
+	extern void my_callback_remotewakeup_disable(); \endcode
  * -# Send a remote wakeup (USB upstream):
  *   - \code udc_remotewakeup(); \endcode
  */
  * \code
 	#define  USB_DEVICE_ATTR (USB_CONFIG_ATTR_BUS_POWERED)
 	#define  UDC_SUSPEND_EVENT()         user_callback_suspend_action()
-	extern void user_callback_suspend_action(void)
+	extern void user_callback_suspend_action()
 	#define  UDC_RESUME_EVENT()          user_callback_resume_action()
-	extern void user_callback_resume_action(void)
+	extern void user_callback_resume_action()
 \endcode
  *
  * Add to application C-file:
  * \code
-	void user_callback_suspend_action(void)
+	void user_callback_suspend_action()
 	{
 	   // Disable hardware component to reduce power consumption
 	}
-	void user_callback_resume_action(void)
+	void user_callback_resume_action()
 	{
 	   // Re-enable hardware component
 	}
 	#define  USB_DEVICE_ATTR (USB_CONFIG_ATTR_BUS_POWERED) \endcode
  *   - \code // Define callback called when the host suspend the USB line
 	#define UDC_SUSPEND_EVENT() user_callback_suspend_action()
-	extern void user_callback_suspend_action(void); \endcode
+	extern void user_callback_suspend_action(); \endcode
  *   - \code // Define callback called when the host or device resume the USB line
 	#define UDC_RESUME_EVENT() user_callback_resume_action()
-	extern void user_callback_resume_action(void); \endcode
+	extern void user_callback_resume_action(); \endcode
  * -# Reduce power consumption in suspend mode (max. 2.5mA on Vbus):
- *   - \code void user_callback_suspend_action(void)
+ *   - \code void user_callback_suspend_action()
 	{
 	turn_off_components();
 	} \endcode
  * \code
 	 uint8_t serial_number[USB_DEVICE_GET_SERIAL_NAME_LENGTH];
 
-	 void init_build_usb_serial_number(void)
+	 void init_build_usb_serial_number()
 	 {
 	 serial_number[0] = 'A';
 	 serial_number[1] = 'B';
  *   - \code
 	 uint8_t serial_number[USB_DEVICE_GET_SERIAL_NAME_LENGTH];
 
-	 void init_build_usb_serial_number(void)
+	 void init_build_usb_serial_number()
 	 {
 	 serial_number[0] = 'A';
 	 serial_number[1] = 'B';

Marlin/src/HAL/HAL_DUE/usb/udd.h

 	uint16_t payload_size;
 
 	//! Callback called after reception of ZLP from setup request
-	void (*callback)(void);
+	void (*callback)();
 
 	//! Callback called when the buffer given (.payload) is full or empty.
 	//! This one return false to abort data transfer, or true with a new buffer in .payload.
-	bool (*over_under_run)(void);
+	bool (*over_under_run)();
 } udd_ctrl_request_t;
 extern udd_ctrl_request_t udd_g_ctrlreq;
 
  * Registered by routine udd_ep_wait_stall_clear()
  * Callback called when endpoint stall is cleared.
  */
-typedef void (*udd_callback_halt_cleared_t)(void);
+typedef void (*udd_callback_halt_cleared_t)();
 
 /**
  * \brief End of transfer callback function type.
  *
  * \return true, if the VBUS monitoring is possible.
  */
-bool udd_include_vbus_monitoring(void);
+bool udd_include_vbus_monitoring();
 
 /**
  * \brief Enables the USB Device mode
  */
-void udd_enable(void);
+void udd_enable();
 
 /**
  * \brief Disables the USB Device mode
  */
-void udd_disable(void);
+void udd_disable();
 
 /**
  * \brief Attach device to the bus when possible
  * then it will attach device when an acceptable Vbus
  * level from the host is detected.
  */
-void udd_attach(void);
+void udd_attach();
 
 /**
  * \brief Detaches the device from the bus
  *
  * The driver must remove pull-up on USB line D- or D+.
  */
-void udd_detach(void);
+void udd_detach();
 
 /**
  * \brief Test whether the USB Device Controller is running at high
  *
  * \return \c true if the Device is running at high speed mode, otherwise \c false.
  */
-bool udd_is_high_speed(void);
+bool udd_is_high_speed();
 
 /**
  * \brief Changes the USB address of device
  *
  * \return USB address
  */
-uint8_t udd_getaddress(void);
+uint8_t udd_getaddress();
 
 /**
  * \brief Returns the current start of frame number
  *
  * \return current start of frame number.
  */
-uint16_t udd_get_frame_number(void);
+uint16_t udd_get_frame_number();
 
 /**
  * \brief Returns the current micro start of frame number
  *
  * \return current micro start of frame number required in high speed mode.
  */
-uint16_t udd_get_micro_frame_number(void);
+uint16_t udd_get_micro_frame_number();
 
 /*! \brief The USB driver sends a resume signal called Upstream Resume
  */
-void udd_send_remotewakeup(void);
+void udd_send_remotewakeup();
 
 /**
  * \brief Load setup payload
  * The following functions allow the device to jump to a specific test mode required in high speed mode.
  */
 //@{
-void udd_test_mode_j(void);
-void udd_test_mode_k(void);
-void udd_test_mode_se0_nak(void);
-void udd_test_mode_packet(void);
+void udd_test_mode_j();
+void udd_test_mode_k();
+void udd_test_mode_se0_nak();
+void udd_test_mode_packet();
 //@}
 
 
  *
  * \return \c 1 if the request is accepted, otherwise \c 0.
  */
-extern bool udc_process_setup(void);
+extern bool udc_process_setup();
 
 /**
  * \brief Reset the UDC
  *
  * The UDC must reset all configuration.
  */
-extern void udc_reset(void);
+extern void udc_reset();
 
 /**
  * \brief To signal that a SOF is occurred
  *
  * The UDC must send the signal to all UDIs enabled
  */
-extern void udc_sof_notify(void);
+extern void udc_sof_notify();
 
 //@}
 

Marlin/src/HAL/HAL_DUE/usb/udi.h

 	 *
 	 * \return \c 1 if function was successfully done, otherwise \c 0.
 	 */
-	bool (*enable)(void);
+	bool (*enable)();
 
 	/**
 	 * \brief Disable the interface.
 	 * - the device is detached from the host (i.e. Vbus is no
 	 *   longer present)
 	 */
-	void (*disable)(void);
+	void (*disable)();
 
 	/**
 	 * \brief Handle a control request directed at an interface.
 	 *
 	 * \return \c 1 if this interface supports the SETUP request, otherwise \c 0.
 	 */
-	bool (*setup)(void);
+	bool (*setup)();
 
 	/**
 	 * \brief Returns the current setting of the selected interface.
 	 *
 	 * \return alternate setting of selected interface
 	 */
-	uint8_t (*getsetting)(void);
+	uint8_t (*getsetting)();
 
 	/**
 	 * \brief To signal that a SOF is occurred
 	 */
-	void (*sof_notify)(void);
+	void (*sof_notify)();
 } udi_api_t;
 
 //@}

Marlin/src/HAL/HAL_DUE/usb/udi_cdc.c

  *
  * @{
  */
-bool udi_cdc_comm_enable(void);
-void udi_cdc_comm_disable(void);
-bool udi_cdc_comm_setup(void);
-bool udi_cdc_data_enable(void);
-void udi_cdc_data_disable(void);
-bool udi_cdc_data_setup(void);
-uint8_t udi_cdc_getsetting(void);
-void udi_cdc_data_sof_notify(void);
+bool udi_cdc_comm_enable();
+void udi_cdc_comm_disable();
+bool udi_cdc_comm_setup();
+bool udi_cdc_data_enable();
+void udi_cdc_data_disable();
+bool udi_cdc_data_setup();
+uint8_t udi_cdc_getsetting();
+void udi_cdc_data_sof_notify();
 UDC_DESC_STORAGE udi_api_t udi_api_cdc_comm = {
 	.enable = udi_cdc_comm_enable,
 	.disable = udi_cdc_comm_disable,
  *
  * \return port number
  */
-static uint8_t udi_cdc_setup_to_port(void);
+static uint8_t udi_cdc_setup_to_port();
 
 /**
  * \brief Sends line coding to application
  *
  * Called after SETUP request when line coding data is received.
  */
-static void udi_cdc_line_coding_received(void);
+static void udi_cdc_line_coding_received();
 
 /**
  * \brief Records new state
 
 //@}
 
-bool udi_cdc_comm_enable(void)
+bool udi_cdc_comm_enable()
 {
 	uint8_t port;
 	uint8_t iface_comm_num;
 	return true;
 }
 
-bool udi_cdc_data_enable(void)
+bool udi_cdc_data_enable()
 {
 	uint8_t port;
 
 	return true;
 }
 
-void udi_cdc_comm_disable(void)
+void udi_cdc_comm_disable()
 {
 	Assert(udi_cdc_nb_comm_enabled != 0);
 	udi_cdc_nb_comm_enabled--;
 }
 
-void udi_cdc_data_disable(void)
+void udi_cdc_data_disable()
 {
 	uint8_t port;
 
 	udi_cdc_data_running = false;
 }
 
-bool udi_cdc_comm_setup(void)
+bool udi_cdc_comm_setup()
 {
 	uint8_t port = udi_cdc_setup_to_port();
 
 	return false;  // request Not supported
 }
 
-bool udi_cdc_data_setup(void)
+bool udi_cdc_data_setup()
 {
 	return false;  // request Not supported
 }
 
-uint8_t udi_cdc_getsetting(void)
+uint8_t udi_cdc_getsetting()
 {
 	return 0;      // CDC don't have multiple alternate setting
 }
 
-void udi_cdc_data_sof_notify(void)
+void udi_cdc_data_sof_notify()
 {
 	static uint8_t port_notify = 0;
 
 // ------------------------
 //------- Internal routines to control serial line
 
-static uint8_t udi_cdc_setup_to_port(void)
+static uint8_t udi_cdc_setup_to_port()
 {
 	uint8_t port;
 
 	return port;
 }
 
-static void udi_cdc_line_coding_received(void)
+static void udi_cdc_line_coding_received()
 {
 	uint8_t port = udi_cdc_setup_to_port();
 	UNUSED(port);
 	udi_cdc_ctrl_state_change(0, b_set, CDC_SERIAL_STATE_DSR);
 }
 
-void udi_cdc_signal_framing_error(void)
+void udi_cdc_signal_framing_error()
 {
 	udi_cdc_ctrl_state_change(0, true, CDC_SERIAL_STATE_FRAMING);
 }
 
-void udi_cdc_signal_parity_error(void)
+void udi_cdc_signal_parity_error()
 {
 	udi_cdc_ctrl_state_change(0, true, CDC_SERIAL_STATE_PARITY);
 }
 
-void udi_cdc_signal_overrun(void)
+void udi_cdc_signal_overrun()
 {
 	udi_cdc_ctrl_state_change(0, true, CDC_SERIAL_STATE_OVERRUN);
 }
 	return nb_received;
 }
 
-iram_size_t udi_cdc_get_nb_received_data(void)
+iram_size_t udi_cdc_get_nb_received_data()
 {
 	return udi_cdc_multi_get_nb_received_data(0);
 }
 	return (udi_cdc_multi_get_nb_received_data(port) > 0);
 }
 
-bool udi_cdc_is_rx_ready(void)
+bool udi_cdc_is_rx_ready()
 {
 	return udi_cdc_multi_is_rx_ready(0);
 }
 	return rx_data;
 }
 
-int udi_cdc_getc(void)
+int udi_cdc_getc()
 {
 	return udi_cdc_multi_getc(0);
 }
 	return retval;
 }
 
-iram_size_t udi_cdc_get_free_tx_buffer(void)
+iram_size_t udi_cdc_get_free_tx_buffer()
 {
 	return udi_cdc_multi_get_free_tx_buffer(0);
 }
 	return (udi_cdc_multi_get_free_tx_buffer(port) != 0);
 }
 
-bool udi_cdc_is_tx_ready(void)
+bool udi_cdc_is_tx_ready()
 {
 	return udi_cdc_multi_is_tx_ready(0);
 }

Marlin/src/HAL/HAL_DUE/usb/udi_cdc.h

 /**
  * \brief Notify a framing error
  */
-void udi_cdc_signal_framing_error(void);
+void udi_cdc_signal_framing_error();
 
 /**
  * \brief Notify a parity error
  */
-void udi_cdc_signal_parity_error(void);
+void udi_cdc_signal_parity_error();
 
 /**
  * \brief Notify a overrun
  */
-void udi_cdc_signal_overrun(void);
+void udi_cdc_signal_overrun();
 
 /**
  * \brief Gets the number of byte received
  *
  * \return the number of data available
  */
-iram_size_t udi_cdc_get_nb_received_data(void);
+iram_size_t udi_cdc_get_nb_received_data();
 
 /**
  * \brief This function checks if a character has been received on the CDC line
  *
  * \return \c 1 if a byte is ready to be read.
  */
-bool udi_cdc_is_rx_ready(void);
+bool udi_cdc_is_rx_ready();
 
 /**
  * \brief Waits and gets a value on CDC line
  *
  * \return value read on CDC line
  */
-int udi_cdc_getc(void);
+int udi_cdc_getc();
 
 /**
  * \brief Reads a RAM buffer on CDC line
  *
  * \return the number of free byte in TX buffer
  */
-iram_size_t udi_cdc_get_free_tx_buffer(void);
+iram_size_t udi_cdc_get_free_tx_buffer();
 
 /**
  * \brief This function checks if a new character sent is possible
  *
  * \return \c 1 if a new character can be sent
  */
-bool udi_cdc_is_tx_ready(void);
+bool udi_cdc_is_tx_ready();
 
 /**
  * \brief Puts a byte on CDC line
  * Content of conf_usb.h:
  * \code
 	 #define UDI_CDC_ENABLE_EXT(port) my_callback_cdc_enable()
-	 extern bool my_callback_cdc_enable(void);
+	 extern bool my_callback_cdc_enable();
 	 #define UDI_CDC_DISABLE_EXT(port) my_callback_cdc_disable()
-	 extern void my_callback_cdc_disable(void);
+	 extern void my_callback_cdc_disable();
 	 #define  UDI_CDC_LOW_RATE
 
 	 #define  UDI_CDC_DEFAULT_RATE             115200
  * Add to application C-file:
  * \code
 	 static bool my_flag_autorize_cdc_transfert = false;
-	 bool my_callback_cdc_enable(void)
+	 bool my_callback_cdc_enable()
 	 {
 	    my_flag_autorize_cdc_transfert = true;
 	    return true;
 	 }
-	 void my_callback_cdc_disable(void)
+	 void my_callback_cdc_disable()
 	 {
 	    my_flag_autorize_cdc_transfert = false;
 	 }
 
-	 void task(void)
+	 void task()
 	 {
 	    if (my_flag_autorize_cdc_transfert) {
 	        udi_cdc_putc('A');
  *   - \code #define USB_DEVICE_SERIAL_NAME  "12...EF" // Disk SN for CDC \endcode
  *     \note The USB serial number is mandatory when a CDC interface is used.
  *   - \code #define UDI_CDC_ENABLE_EXT(port) my_callback_cdc_enable()
-	 extern bool my_callback_cdc_enable(void); \endcode
+	 extern bool my_callback_cdc_enable(); \endcode
  *     \note After the device enumeration (detecting and identifying USB devices),
  *     the USB host starts the device configuration. When the USB CDC interface
  *     from the device is accepted by the host, the USB host enables this interface and the
  *     UDI_CDC_ENABLE_EXT() callback function is called and return true.
  *     Thus, when this event is received, the data transfer on CDC interface are authorized.
  *   - \code #define UDI_CDC_DISABLE_EXT(port) my_callback_cdc_disable()
-	 extern void my_callback_cdc_disable(void); \endcode
+	 extern void my_callback_cdc_disable(); \endcode
  *     \note When the USB device is unplugged or is reset by the USB host, the USB
  *     interface is disabled and the UDI_CDC_DISABLE_EXT() callback function
  *     is called. Thus, the data transfer must be stopped on CDC interface.
  *     \note Default configuration of communication port at startup.
  * -# Send or wait data on CDC line:
  *   - \code // Waits and gets a value on CDC line
-	int udi_cdc_getc(void);
+	int udi_cdc_getc();
 	// Reads a RAM buffer on CDC line
 	iram_size_t udi_cdc_read_buf(int* buf, iram_size_t size);
 	// Puts a byte on CDC line

Marlin/src/HAL/HAL_DUE/usb/udi_msc.c

  *
  * @{
  */
-bool udi_msc_enable(void);
-void udi_msc_disable(void);
-bool udi_msc_setup(void);
-uint8_t udi_msc_getsetting(void);
+bool udi_msc_enable();
+void udi_msc_disable();
+bool udi_msc_setup();
+uint8_t udi_msc_getsetting();
 
 //! Global structure which contains standard UDI API for UDC
 UDC_DESC_STORAGE udi_api_t udi_api_msc = {
 /**
  * \brief Stall CBW request
  */
-static void udi_msc_cbw_invalid(void);
+static void udi_msc_cbw_invalid();
 
 /**
  * \brief Stall CSW request
  */
-static void udi_msc_csw_invalid(void);
+static void udi_msc_csw_invalid();
 
 /**
  * \brief Links a callback and buffer on endpoint OUT reception
  * - enable interface
  * - at the end of previous command after sending the CSW
  */
-static void udi_msc_cbw_wait(void);
+static void udi_msc_cbw_wait();
 
 /**
  * \brief Callback called after CBW reception
  *
  * Called at the end of SCSI command
  */
-static void udi_msc_csw_process(void);
+static void udi_msc_csw_process();
 
 /**
  * \brief Sends CSW
  * Called by #udi_msc_csw_process()
  * or UDD callback when endpoint halt is cleared
  */
-void udi_msc_csw_send(void);
+void udi_msc_csw_send();
 
 /**
  * \brief Callback called after CSW sent
 /**
  * \brief Reinitialize sense data.
  */
-static void udi_msc_clear_sense(void);
+static void udi_msc_clear_sense();
 
 /**
  * \brief Update sense data with new value to signal a fail
 /**
  * \brief Update sense data with new value to signal success
  */
-static void udi_msc_sense_pass(void);
+static void udi_msc_sense_pass();
 
 /**
  * \brief Update sense data to signal that memory is not present
  */
-static void udi_msc_sense_fail_not_present(void);
+static void udi_msc_sense_fail_not_present();
 
 /**
  * \brief Update sense data to signal that memory is busy
  */
-static void udi_msc_sense_fail_busy_or_change(void);
+static void udi_msc_sense_fail_busy_or_change();
 
 /**
  * \brief Update sense data to signal a hardware error on memory
  */
-static void udi_msc_sense_fail_hardware(void);
+static void udi_msc_sense_fail_hardware();
 
 /**
  * \brief Update sense data to signal that memory is protected
  */
-static void udi_msc_sense_fail_protected(void);
+static void udi_msc_sense_fail_protected();
 
 /**
  * \brief Update sense data to signal that CDB fields are not valid
  */
-static void udi_msc_sense_fail_cdb_invalid(void);
+static void udi_msc_sense_fail_cdb_invalid();
 
 /**
  * \brief Update sense data to signal that command is not supported
  */
-static void udi_msc_sense_command_invalid(void);
+static void udi_msc_sense_command_invalid();
 //@}
 
 
  * \brief Process SPC Request Sense command
  * Returns error information about last command
  */
-static void udi_msc_spc_requestsense(void);
+static void udi_msc_spc_requestsense();
 
 /**
  * \brief Process SPC Inquiry command
  * Returns information (name,version) about disk
  */
-static void udi_msc_spc_inquiry(void);
+static void udi_msc_spc_inquiry();
 
 /**
  * \brief Checks state of disk
  *
  * \retval true if disk is ready, otherwise false and updates sense data
  */
-static bool udi_msc_spc_testunitready_global(void);
+static bool udi_msc_spc_testunitready_global();
 
 /**
  * \brief Process test unit ready command
  * Returns state of logical unit
  */
-static void udi_msc_spc_testunitready(void);
+static void udi_msc_spc_testunitready();
 
 /**
  * \brief Process prevent allow medium removal command
  */
-static void udi_msc_spc_prevent_allow_medium_removal(void);
+static void udi_msc_spc_prevent_allow_medium_removal();
 
 /**
  * \brief Process mode sense command
 /**
  * \brief Process start stop command
  */
-static void udi_msc_sbc_start_stop(void);
+static void udi_msc_sbc_start_stop();
 
 /**
  * \brief Process read capacity command
  */
-static void udi_msc_sbc_read_capacity(void);
+static void udi_msc_sbc_read_capacity();
 
 /**
  * \brief Process read10 or write10 command
 //@}
 
 
-bool udi_msc_enable(void)
+bool udi_msc_enable()
 {
   uint8_t lun;
   udi_msc_b_trans_req = false;
 }
 
 
-void udi_msc_disable(void)
+void udi_msc_disable()
 {
   udi_msc_b_trans_req = false;
   udi_msc_b_ack_trans = true;
 }
 
 
-bool udi_msc_setup(void)
+bool udi_msc_setup()
 {
   if (Udd_setup_is_in()) {
     // Requests Interface GET
   return false; // Not supported request
 }
 
-uint8_t udi_msc_getsetting(void)
+uint8_t udi_msc_getsetting()
 {
   return 0; // MSC don't have multiple alternate setting
 }
 // ------------------------
 //------- Routines to process CBW packet
 
-static void udi_msc_cbw_invalid(void)
+static void udi_msc_cbw_invalid()
 {
   if (!udi_msc_b_cbw_invalid)
     return; // Don't re-stall endpoint if error reseted by setup
   udd_ep_wait_stall_clear(UDI_MSC_EP_OUT, udi_msc_cbw_invalid);
 }
 
-static void udi_msc_csw_invalid(void)
+static void udi_msc_csw_invalid()
 {
   if (!udi_msc_b_cbw_invalid)
     return; // Don't re-stall endpoint if error reseted by setup
   udd_ep_wait_stall_clear(UDI_MSC_EP_IN, udi_msc_csw_invalid);
 }
 
-static void udi_msc_cbw_wait(void)
+static void udi_msc_cbw_wait()
 {
   // Register buffer and callback on OUT endpoint
   if (!udd_ep_run(UDI_MSC_EP_OUT, true,
 // ------------------------
 //------- Routines to process CSW packet
 
-static void udi_msc_csw_process(void)
+static void udi_msc_csw_process()
 {
   if (0 != udi_msc_csw.dCSWDataResidue) {
     // Residue not NULL
 }
 
 
-void udi_msc_csw_send(void)
+void udi_msc_csw_send()
 {
   // Sends CSW on IN endpoint
   if (!udd_ep_run(UDI_MSC_EP_IN, false,
 // ------------------------
 //------- Routines manage sense data
 
-static void udi_msc_clear_sense(void)
+static void udi_msc_clear_sense()
 {
   memset((uint8_t*)&udi_msc_sense, 0, sizeof(struct scsi_request_sense_data));
   udi_msc_sense.valid_reponse_code = SCSI_SENSE_VALID | SCSI_SENSE_CURRENT;
   udi_msc_sense.AddSnsCodeQlfr = add_sense;
 }
 
-static void udi_msc_sense_pass(void)
+static void udi_msc_sense_pass()
 {
   udi_msc_clear_sense();
   udi_msc_csw.bCSWStatus = USB_CSW_STATUS_PASS;
 }
 
 
-static void udi_msc_sense_fail_not_present(void)
+static void udi_msc_sense_fail_not_present()
 {
   udi_msc_sense_fail(SCSI_SK_NOT_READY, SCSI_ASC_MEDIUM_NOT_PRESENT, 0);
 }
 
-static void udi_msc_sense_fail_busy_or_change(void)
+static void udi_msc_sense_fail_busy_or_change()
 {
   udi_msc_sense_fail(SCSI_SK_UNIT_ATTENTION,
       SCSI_ASC_NOT_READY_TO_READY_CHANGE, 0);
 }
 
-static void udi_msc_sense_fail_hardware(void)
+static void udi_msc_sense_fail_hardware()
 {
   udi_msc_sense_fail(SCSI_SK_HARDWARE_ERROR,
       SCSI_ASC_NO_ADDITIONAL_SENSE_INFO, 0);
 }
 
-static void udi_msc_sense_fail_protected(void)
+static void udi_msc_sense_fail_protected()
 {
   udi_msc_sense_fail(SCSI_SK_DATA_PROTECT, SCSI_ASC_WRITE_PROTECTED, 0);
 }
 
-static void udi_msc_sense_fail_cdb_invalid(void)
+static void udi_msc_sense_fail_cdb_invalid()
 {
   udi_msc_sense_fail(SCSI_SK_ILLEGAL_REQUEST,
       SCSI_ASC_INVALID_FIELD_IN_CDB, 0);
 }
 
-static void udi_msc_sense_command_invalid(void)
+static void udi_msc_sense_command_invalid()
 {
   udi_msc_sense_fail(SCSI_SK_ILLEGAL_REQUEST,
       SCSI_ASC_INVALID_COMMAND_OPERATION_CODE, 0);
 // ------------------------
 //------- Routines manage SCSI Commands
 
-static void udi_msc_spc_requestsense(void)
+static void udi_msc_spc_requestsense()
 {
   uint8_t length = udi_msc_cbw.CDB[4];
 
 }
 
 
-static void udi_msc_spc_inquiry(void)
+static void udi_msc_spc_inquiry()
 {
   uint8_t length, i;
   UDC_DATA(4)
 }
 
 
-static bool udi_msc_spc_testunitready_global(void)
+static bool udi_msc_spc_testunitready_global()
 {
   switch (mem_test_unit_ready(udi_msc_cbw.bCBWLUN)) {
   case CTRL_GOOD:
 }
 
 
-static void udi_msc_spc_testunitready(void)
+static void udi_msc_spc_testunitready()
 {
   if (udi_msc_spc_testunitready_global()) {
     // LUN ready, then update sense data with status pass
 }
 
 
-static void udi_msc_spc_prevent_allow_medium_removal(void)
+static void udi_msc_spc_prevent_allow_medium_removal()
 {
   uint8_t prevent = udi_msc_cbw.CDB[4];
   if (0 == prevent) {
 }
 
 
-static void udi_msc_sbc_start_stop(void)
+static void udi_msc_sbc_start_stop()
 {
   bool start = 0x1 & udi_msc_cbw.CDB[4];
   bool loej = 0x2 & udi_msc_cbw.CDB[4];
 }
 
 
-static void udi_msc_sbc_read_capacity(void)
+static void udi_msc_sbc_read_capacity()
 {
   UDC_BSS(4) static struct sbc_read_capacity10_data udi_msc_capacity;
 
 }
 
 
-bool udi_msc_process_trans(void)
+bool udi_msc_process_trans()
 {
   Ctrl_status status;
 

Marlin/src/HAL/HAL_DUE/usb/udi_msc.h

  *
  * Routine called by the main loop
  */
-bool udi_msc_process_trans(void);
+bool udi_msc_process_trans();
 
 /**
  * \brief Transfers data to/from USB MSC endpoints
 	#define UDI_MSC_GLOBAL_PRODUCT_VERSION \
 	   '1', '.', '0', '0'
 	#define UDI_MSC_ENABLE_EXT() my_callback_msc_enable()
-	extern bool my_callback_msc_enable(void);
+	extern bool my_callback_msc_enable();
 	#define UDI_MSC_DISABLE_EXT() my_callback_msc_disable()
-	extern void my_callback_msc_disable(void);
+	extern void my_callback_msc_disable();
 	#include "udi_msc_conf.h" // At the end of conf_usb.h file
 \endcode
  *
  * Add to application C-file:
  * \code
 	 static bool my_flag_autorize_msc_transfert = false;
-	 bool my_callback_msc_enable(void)
+	 bool my_callback_msc_enable()
 	 {
 	    my_flag_autorize_msc_transfert = true;
 	    return true;
 	 }
-	 void my_callback_msc_disable(void)
+	 void my_callback_msc_disable()
 	 {
 	    my_flag_autorize_msc_transfert = false;
 	 }
 
-	 void task(void)
+	 void task()
 	 {
 	    udi_msc_process_trans();
 	 }
  *     \note The USB MSC interface requires a vendor ID (8 ASCII characters)
  *     and a product version (4 ASCII characters).
  *   - \code #define UDI_MSC_ENABLE_EXT() my_callback_msc_enable()
-	extern bool my_callback_msc_enable(void); \endcode
+	extern bool my_callback_msc_enable(); \endcode
  *     \note After the device enumeration (detecting and identifying USB devices),
  *     the USB host starts the device configuration. When the USB MSC interface
  *     from the device is accepted by the host, the USB host enables this interface and the
  *     Thus, when this event is received, the tasks which call
  *     udi_msc_process_trans() must be enabled.
  *   - \code #define UDI_MSC_DISABLE_EXT() my_callback_msc_disable()
-	extern void my_callback_msc_disable(void); \endcode
+	extern void my_callback_msc_disable(); \endcode
  *     \note When the USB device is unplugged or is reset by the USB host, the USB
  *     interface is disabled and the UDI_MSC_DISABLE_EXT() callback function
  *     is called. Thus, it is recommended to disable the task which is called udi_msc_process_trans().
  * which provides the memories interfaces. However, the memory data transfers
  * must be done outside USB interrupt routine. This is done in the MSC process
  * ("udi_msc_process_trans()") called by main loop:
- *   - \code  * void task(void) {
+ *   - \code  * void task() {
 	udi_msc_process_trans();
 	} \endcode
  * -# The MSC speed depends on task periodicity. To get the best speed
  * the notification callback "UDI_MSC_NOTIFY_TRANS_EXT" can be used to wakeup
  * this task (Example, through a mutex):
  *   - \code #define  UDI_MSC_NOTIFY_TRANS_EXT()    msc_notify_trans()
-	void msc_notify_trans(void) {
+	void msc_notify_trans() {
 	wakeup_my_task();
 	} \endcode
  *

Marlin/src/HAL/HAL_DUE/usb/uotghs_device_due.c

  *
  * Called after a USB line reset or when UDD is enabled
  */
-static void udd_reset_ep_ctrl(void);
+static void udd_reset_ep_ctrl();
 
 /**
  * \brief Reset control endpoint management
  *
  * Called after a USB line reset or at the end of SETUP request (after ZLP)
  */
-static void udd_ctrl_init(void);
+static void udd_ctrl_init();
 
 //! \brief Managed reception of SETUP packet on control endpoint
-static void udd_ctrl_setup_received(void);
+static void udd_ctrl_setup_received();
 
 //! \brief Managed reception of IN packet on control endpoint
-static void udd_ctrl_in_sent(void);
+static void udd_ctrl_in_sent();
 
 //! \brief Managed reception of OUT packet on control endpoint
-static void udd_ctrl_out_received(void);
+static void udd_ctrl_out_received();
 
 //! \brief Managed underflow event of IN packet on control endpoint
-static void udd_ctrl_underflow(void);
+static void udd_ctrl_underflow();
 
 //! \brief Managed overflow event of OUT packet on control endpoint
-static void udd_ctrl_overflow(void);
+static void udd_ctrl_overflow();
 
 //! \brief Managed stall event of IN/OUT packet on control endpoint
-static void udd_ctrl_stall_data(void);
+static void udd_ctrl_stall_data();
 
 //! \brief Send a ZLP IN on control endpoint
-static void udd_ctrl_send_zlp_in(void);
+static void udd_ctrl_send_zlp_in();
 
 //! \brief Send a ZLP OUT on control endpoint
-static void udd_ctrl_send_zlp_out(void);
+static void udd_ctrl_send_zlp_out();
 
 //! \brief Call callback associated to setup request
-static void udd_ctrl_endofrequest(void);
+static void udd_ctrl_endofrequest();
 
 
 /**
  *
  * \return \c 1 if an event about control endpoint is occured, otherwise \c 0.
  */
-static bool udd_ctrl_interrupt(void);
+static bool udd_ctrl_interrupt();
 
 //@}
 
 static udd_ep_job_t udd_ep_job[USB_DEVICE_MAX_EP];
 
 //! \brief Reset all job table
-static void udd_ep_job_table_reset(void);
+static void udd_ep_job_table_reset();
 
 //! \brief Abort all endpoint jobs on going
-static void udd_ep_job_table_kill(void);
+static void udd_ep_job_table_kill();
 
 #ifdef UDD_EP_FIFO_SUPPORTED
 	/**
  *
  * \return \c 1 if an event about bulk/interrupt/isochronous endpoints has occured, otherwise \c 0.
  */
-static bool udd_ep_interrupt(void);
+static bool udd_ep_interrupt();
 
 #endif // (0!=USB_DEVICE_MAX_EP)
 //@}
  * See Technical reference $3.8.3 Masking interrupt requests in peripheral modules.
  */
 #ifdef UHD_ENABLE
-void udd_interrupt(void);
-void udd_interrupt(void)
+void udd_interrupt();
+void udd_interrupt()
 #else
 ISR(UDD_USB_INT_FUN)
 #endif
 }
 
 
-bool udd_include_vbus_monitoring(void)
+bool udd_include_vbus_monitoring()
 {
 	return true;
 }
 
 
-void udd_enable(void)
+void udd_enable()
 {
 	irqflags_t flags;
 
 }
 
 
-void udd_disable(void)
+void udd_disable()
 {
 	irqflags_t flags;
 
 }
 
 
-void udd_attach(void)
+void udd_attach()
 {
 	irqflags_t flags;
 	flags = cpu_irq_save();
 }
 
 
-void udd_detach(void)
+void udd_detach()
 {
 	otg_unfreeze_clock();
 
 }
 
 
-bool udd_is_high_speed(void)
+bool udd_is_high_speed()
 {
 #ifdef USB_DEVICE_HS_SUPPORT
 	return !Is_udd_full_speed_mode();
 }
 
 
-uint8_t udd_getaddress(void)
+uint8_t udd_getaddress()
 {
 	return udd_get_configured_address();
 }
 
 
-uint16_t udd_get_frame_number(void)
+uint16_t udd_get_frame_number()
 {
 	return udd_frame_number();
 }
 
-uint16_t udd_get_micro_frame_number(void)
+uint16_t udd_get_micro_frame_number()
 {
 	return udd_micro_frame_number();
 }
 
-void udd_send_remotewakeup(void)
+void udd_send_remotewakeup()
 {
 #ifndef UDD_NO_SLEEP_MGR
 	if (!udd_b_idle)
 
 #ifdef USB_DEVICE_HS_SUPPORT
 
-void udd_test_mode_j(void)
+void udd_test_mode_j()
 {
 	udd_enable_hs_test_mode();
 	udd_enable_hs_test_mode_j();
 }
 
 
-void udd_test_mode_k(void)
+void udd_test_mode_k()
 {
 	udd_enable_hs_test_mode();
 	udd_enable_hs_test_mode_k();
 }
 
 
-void udd_test_mode_se0_nak(void)
+void udd_test_mode_se0_nak()
 {
 	udd_enable_hs_test_mode();
 }
 
 
-void udd_test_mode_packet(void)
+void udd_test_mode_packet()
 {
 	uint8_t i;
 	uint8_t *ptr_dest;
 // ------------------------
 //--- INTERNAL ROUTINES TO MANAGED THE CONTROL ENDPOINT
 
-static void udd_reset_ep_ctrl(void)
+static void udd_reset_ep_ctrl()
 {
 	irqflags_t flags;
 
 	cpu_irq_restore(flags);
 }
 
-static void udd_ctrl_init(void)
+static void udd_ctrl_init()
 {
 	irqflags_t flags;
 	flags = cpu_irq_save();
 }
 
 
-static void udd_ctrl_setup_received(void)
+static void udd_ctrl_setup_received()
 {
 	irqflags_t flags;
 	uint8_t i;
 }
 
 
-static void udd_ctrl_in_sent(void)
+static void udd_ctrl_in_sent()
 {
 	static bool b_shortpacket = false;
 	uint16_t nb_remain;
 }
 
 
-static void udd_ctrl_out_received(void)
+static void udd_ctrl_out_received()
 {
 	irqflags_t flags;
 	uint8_t i;
 }
 
 
-static void udd_ctrl_underflow(void)
+static void udd_ctrl_underflow()
 {
 	if (Is_udd_out_received(0))
 		return; // Underflow ignored if OUT data is received
 }
 
 
-static void udd_ctrl_overflow(void)
+static void udd_ctrl_overflow()
 {
 	if (Is_udd_in_send(0))
 		return; // Overflow ignored if IN data is received
 }
 
 
-static void udd_ctrl_stall_data(void)
+static void udd_ctrl_stall_data()
 {
 	// Stall all packets on IN & OUT control endpoint
 	udd_ep_control_state = UDD_EPCTRL_STALL_REQ;
 }
 
 
-static void udd_ctrl_send_zlp_in(void)
+static void udd_ctrl_send_zlp_in()
 {
 	irqflags_t flags;
 
 }
 
 
-static void udd_ctrl_send_zlp_out(void)
+static void udd_ctrl_send_zlp_out()
 {
 	irqflags_t flags;
 
 }
 
 
-static void udd_ctrl_endofrequest(void)
+static void udd_ctrl_endofrequest()
 {
 	// If a callback is registered then call it
 	if (udd_g_ctrlreq.callback) {
 }
 
 
-static bool udd_ctrl_interrupt(void)
+static bool udd_ctrl_interrupt()
 {
 
 	if (!Is_udd_endpoint_interrupt(0)) {
 
 #if (0 != USB_DEVICE_MAX_EP)
 
-static void udd_ep_job_table_reset(void)
+static void udd_ep_job_table_reset()
 {
 	uint8_t i;
 	for (i = 0; i < USB_DEVICE_MAX_EP; i++) {
 }
 
 
-static void udd_ep_job_table_kill(void)
+static void udd_ep_job_table_kill()
 {
 	uint8_t i;
 
 }
 #endif // #ifdef UDD_EP_FIFO_SUPPORTED
 
-static bool udd_ep_interrupt(void)
+static bool udd_ep_interrupt()
 {
 	udd_ep_id_t ep;
 	udd_ep_job_t *ptr_job;

Marlin/src/HAL/HAL_DUE/usb/uotghs_otg.h

  *
  * \return \c true if the ID pin management has been started, otherwise \c false.
  */
-bool otg_dual_enable(void);
+bool otg_dual_enable();
 
 /**
  * \brief Uninitialize the dual role
  * This function is implemented in uotghs_host.c file.
  */
-void otg_dual_disable(void);
+void otg_dual_disable();
 
 
 //! @name UOTGHS OTG ID pin management

Marlin/src/HAL/HAL_DUE/usb/usb_task.c

 static volatile bool main_b_cdc_enable = false;
 static volatile bool main_b_dtr_active = false;
 
-void usb_task_idle(void) {
+void usb_task_idle() {
   #if ENABLED(SDSUPPORT)
     // Attend SD card access from the USB MSD -- Prioritize access to improve speed
     int delay = 2;
 }
 
 #if ENABLED(SDSUPPORT)
-  bool usb_task_msc_enable(void)                { return ((main_b_msc_enable = true)); }
-  void usb_task_msc_disable(void)               { main_b_msc_enable = false; }
-  bool usb_task_msc_isenabled(void)             { return main_b_msc_enable; }
+  bool usb_task_msc_enable()                { return ((main_b_msc_enable = true)); }
+  void usb_task_msc_disable()               { main_b_msc_enable = false; }
+  bool usb_task_msc_isenabled()             { return main_b_msc_enable; }
 #endif
 
 bool usb_task_cdc_enable(const uint8_t port)  { UNUSED(port); return ((main_b_cdc_enable = true)); }
 void usb_task_cdc_disable(const uint8_t port) { UNUSED(port); main_b_cdc_enable = false; main_b_dtr_active = false; }
-bool usb_task_cdc_isenabled(void)             { return main_b_cdc_enable; }
+bool usb_task_cdc_isenabled()             { return main_b_cdc_enable; }
 
 /*! \brief Called by CDC interface
  * Callback running when CDC device have received data
   }
 }
 
-bool usb_task_cdc_dtr_active(void)             { return main_b_dtr_active; }
+bool usb_task_cdc_dtr_active()             { return main_b_dtr_active; }
 
 /// Microsoft WCID descriptor
 typedef struct USB_MicrosoftCompatibleDescriptor_Interface {
 ** WCID configuration information
 ** Hooked into UDC via UDC_GET_EXTRA_STRING #define.
 */
-bool usb_task_extra_string(void) {
+bool usb_task_extra_string() {
   static uint8_t udi_msft_magic[] = "MSFT100\xEE";
   static uint8_t udi_cdc_name[] = "CDC interface";
   #if ENABLED(SDSUPPORT)
 /**************************************************************************************************
 ** Handle device requests that the ASF stack doesn't
 */
-bool usb_task_other_requests(void) {
+bool usb_task_other_requests() {
   uint8_t* ptr = 0;
   uint16_t size = 0;
 
   return true;
 }
 
-void usb_task_init(void) {
+void usb_task_init() {
 
   uint16_t *ptr;
 

Marlin/src/HAL/HAL_DUE/usb/usb_task.h

  *
  * \retval true if MSC startup is ok
  */
-bool usb_task_msc_enable(void);
+bool usb_task_msc_enable();
 
 /*! \brief Called by MSC interface
  * Callback running when USB Host disable MSC interface
  */
-void usb_task_msc_disable(void);
+void usb_task_msc_disable();
 
 /*! \brief Opens the communication port
  * This is called by CDC interface when USB Host enable it.
 
 /*! \brief Check if MSC is enumerated and configured on the PC side
  */
-bool usb_task_msc_isenabled(void);
+bool usb_task_msc_isenabled();
 
 /*! \brief Check if CDC is enumerated and configured on the PC side
  */
-bool usb_task_cdc_isenabled(void);
+bool usb_task_cdc_isenabled();
 
 /*! \brief Check if CDC is actually OPEN by an application on the PC side
  *  assuming DTR signal means a program is listening to messages
  */
-bool usb_task_cdc_dtr_active(void);
+bool usb_task_cdc_dtr_active();
 
 /*! \brief Called by UDC when USB Host request a extra string different
  * of this specified in USB device descriptor
  */
-bool usb_task_extra_string(void);
+bool usb_task_extra_string();
 
 /*! \brief Called by UDC when USB Host performs unknown requests
  */
-bool usb_task_other_requests(void);
+bool usb_task_other_requests();
 
 /*! \brief Called by CDC interface
  * Callback running when CDC device have received data
 
 /*! \brief The USB device interrupt
  */
-void USBD_ISR(void);
+void USBD_ISR();
 
 /*! \brief USB task init
  */
-void usb_task_init(void);
+void usb_task_init();
 
 /*! \brief USB task idle
  */
-void usb_task_idle(void);
+void usb_task_idle();
 
 #ifdef __cplusplus
 }

Marlin/src/HAL/HAL_DUE/watchdog.cpp

 // process, because watchdog initialization at hardware reset on SAM3X8E
 // is unreliable, and there is risk of unintended resets if we delay
 // that initialization to a later time.
-void watchdogSetup(void) {
+void watchdogSetup() {
 
   #if ENABLED(USE_WATCHDOG)
 
   // Initialize watchdog - On SAM3X, Watchdog was already configured
   //  and enabled or disabled at startup, so no need to reconfigure it
   //  here.
-  void watchdog_init(void) {
+  void watchdog_init() {
     // Reset watchdog to start clean
     WDT_Restart(WDT);
   }

Marlin/src/HAL/HAL_ESP32/FlushableHardwareSerial.h

 public:
   FlushableHardwareSerial(int uart_nr);
 
-  inline void flushTX(void) { /* No need to flush the hardware serial, but defined here for compatibility. */ }
+  inline void flushTX() { /* No need to flush the hardware serial, but defined here for compatibility. */ }
 };
 
 extern FlushableHardwareSerial flushableSerial;

Marlin/src/HAL/HAL_ESP32/HAL.cpp

 // Public functions
 // ------------------------
 
-void HAL_init(void) {
+void HAL_init() {
   i2s_init();
 }
 
-void HAL_init_board(void) {
+void HAL_init_board() {
   #if EITHER(EEPROM_SETTINGS, WEBSUPPORT)
     spiffs_init();
   #endif
   #endif
 }
 
-void HAL_idletask(void) {
+void HAL_idletask() {
   #if ENABLED(OTASUPPORT)
     OTA_handle();
   #endif
 }
 
-void HAL_clear_reset_source(void) { }
+void HAL_clear_reset_source() { }
 
-uint8_t HAL_get_reset_source(void) { return rtc_get_reset_reason(1); }
+uint8_t HAL_get_reset_source() { return rtc_get_reset_reason(1); }
 
 void _delay_ms(int delay_ms) { delay(delay_ms); }
 

Marlin/src/HAL/HAL_ESP32/HAL.h

 // ------------------------
 
 // clear reset reason
-void HAL_clear_reset_source(void);
+void HAL_clear_reset_source();
 
 // reset reason
-uint8_t HAL_get_reset_source(void);
+uint8_t HAL_get_reset_source();
 
 void _delay_ms(int delay);
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
-int freeMemory(void);
+int freeMemory();
 #pragma GCC diagnostic pop
 
 void analogWrite(pin_t pin, int value);
 // ADC
 #define HAL_ANALOG_SELECT(pin)
 
-void HAL_adc_init(void);
+void HAL_adc_init();
 
 #define HAL_START_ADC(pin)  HAL_adc_start_conversion(pin)
 #define HAL_READ_ADC()      HAL_adc_result
 // Enable hooks into idle and setup for HAL
 #define HAL_IDLETASK 1
 #define BOARD_INIT() HAL_init_board();
-void HAL_idletask(void);
-void HAL_init(void);
-void HAL_init_board(void);
+void HAL_idletask();
+void HAL_init();
+void HAL_init_board();

Marlin/src/HAL/HAL_ESP32/HAL_SPI.cpp

   SPI.begin();
 }
 
-uint8_t spiRec(void) {
+uint8_t spiRec() {
   SPI.beginTransaction(spiConfig);
   uint8_t returnByte = SPI.transfer(0xFF);
   SPI.endTransaction();

Marlin/src/HAL/HAL_ESP32/WebSocketSerial.cpp

   return written;
 }
 
-int RingBuffer::available(void) {
+int RingBuffer::available() {
   return (size - read_index + write_index) & (size - 1);
 }
 
-int RingBuffer::peek(void) {
+int RingBuffer::peek() {
   return available() ? data[read_index] : -1;
 }
 
-int RingBuffer::read(void) {
+int RingBuffer::read() {
   if (available()) {
     const int ret = data[read_index];
     read_index = NEXT_INDEX(read_index, size);
   return len;
 }
 
-void RingBuffer::flush(void) { read_index = write_index; }
+void RingBuffer::flush() { read_index = write_index; }
 
 // WebSocketSerial impl
 WebSocketSerial::WebSocketSerial()
 }
 
 void WebSocketSerial::end() { }
-int WebSocketSerial::peek(void) { return rx_buffer.peek(); }
-int WebSocketSerial::read(void) { return rx_buffer.read(); }
-int WebSocketSerial::available(void) { return rx_buffer.available(); }
-void WebSocketSerial::flush(void) { rx_buffer.flush(); }
+int WebSocketSerial::peek() { return rx_buffer.peek(); }
+int WebSocketSerial::read() { return rx_buffer.read(); }
+int WebSocketSerial::available() { return rx_buffer.available(); }
+void WebSocketSerial::flush() { rx_buffer.flush(); }
 
 size_t WebSocketSerial::write(const uint8_t c) {
   size_t ret = tx_buffer.write(c);
   return written;
 }
 
-void WebSocketSerial::flushTX(void) {
+void WebSocketSerial::flushTX() {
   // No need to do anything as there's no benefit to sending partial lines over the websocket connection.
 }
 

Marlin/src/HAL/HAL_ESP32/WebSocketSerial.h

   RingBuffer(ring_buffer_pos_t size);
   ~RingBuffer();
 
-  int available(void);
-  int peek(void);
-  int read(void);
+  int available();
+  int peek();
+  int read();
   ring_buffer_pos_t read(uint8_t *buffer);
-  void flush(void);
+  void flush();
   ring_buffer_pos_t write(const uint8_t c);
   ring_buffer_pos_t write(const uint8_t* buffer, ring_buffer_pos_t size);
 };
   WebSocketSerial();
   void begin(const long);
   void end();
-  int available(void);
-  int peek(void);
-  int read(void);
-  void flush(void);
-  void flushTX(void);
+  int available();
+  int peek();
+  int read();
+  void flush();
+  void flushTX();
   size_t write(const uint8_t c);
   size_t write(const uint8_t* buffer, size_t size);
 

Marlin/src/HAL/HAL_ESP32/endstop_interrupts.h

 #include "../../module/endstops.h"
 
 // One ISR for all EXT-Interrupts
-void ICACHE_RAM_ATTR endstop_ISR(void) { endstops.update(); }
+void ICACHE_RAM_ATTR endstop_ISR() { endstops.update(); }
 
-void setup_endstop_interrupts(void) {
+void setup_endstop_interrupts() {
   #define _ATTACH(P) attachInterrupt(digitalPinToInterrupt(P), endstop_ISR, CHANGE)
   #if HAS_X_MAX
     _ATTACH(X_MAX_PIN);

Marlin/src/HAL/HAL_ESP32/timers.h

 #define ENABLE_TEMPERATURE_INTERRUPT()  HAL_timer_enable_interrupt(TEMP_TIMER_NUM)
 #define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(TEMP_TIMER_NUM)
 
-#define HAL_TEMP_TIMER_ISR() extern "C" void tempTC_Handler(void)
-#define HAL_STEP_TIMER_ISR() extern "C" void stepTC_Handler(void)
-#define HAL_PWM_TIMER_ISR() extern "C" void pwmTC_Handler(void)
+#define HAL_TEMP_TIMER_ISR() extern "C" void tempTC_Handler()
+#define HAL_STEP_TIMER_ISR() extern "C" void stepTC_Handler()
+#define HAL_PWM_TIMER_ISR() extern "C" void pwmTC_Handler()
 
-extern "C" void tempTC_Handler(void);
-extern "C" void stepTC_Handler(void);
-extern "C" void pwmTC_Handler(void);
+extern "C" void tempTC_Handler();
+extern "C" void stepTC_Handler();
+extern "C" void pwmTC_Handler();
 
 // ------------------------
 // Types
   timer_group_t  group;
   timer_idx_t    idx;
   uint32_t       divider;
-  void           (*fn)(void);
+  void           (*fn)();
 } tTimerConfig;
 
 // ------------------------

Marlin/src/HAL/HAL_ESP32/watchdog.cpp

 
 #include "watchdog.h"
 
-void watchdogSetup(void) {
+void watchdogSetup() {
   // do whatever. don't remove this function.
 }
 
-void watchdog_init(void) {
+void watchdog_init() {
   // TODO
 }
 

Marlin/src/HAL/HAL_LINUX/HAL.cpp

 extern "C" void u8g_xMicroDelay(uint16_t val) {
   DELAY_US(val);
 }
-extern "C" void u8g_MicroDelay(void) {
+extern "C" void u8g_MicroDelay() {
   u8g_xMicroDelay(1);
 }
-extern "C" void u8g_10MicroDelay(void) {
+extern "C" void u8g_10MicroDelay() {
   u8g_xMicroDelay(10);
 }
 extern "C" void u8g_Delay(uint16_t val) {
 // ADC
 // ------------------------
 
-void HAL_adc_init(void) {
+void HAL_adc_init() {
 
 }
 
   active_ch = ch;
 }
 
-bool HAL_adc_finished(void) {
+bool HAL_adc_finished() {
   return true;
 }
 
-uint16_t HAL_adc_get_result(void) {
+uint16_t HAL_adc_get_result() {
   pin_t pin = analogInputToDigitalPin(active_ch);
   if (!VALID_PIN(pin)) return 0;
   uint16_t data = ((Gpio::get(pin) >> 2) & 0x3FF);
   return data;    // return 10bit value as Marlin expects
 }
 
-void HAL_pwm_init(void) {
+void HAL_pwm_init() {
 
 }
 

Marlin/src/HAL/HAL_LINUX/HAL.h

 #define ENABLE_ISRS()
 #define DISABLE_ISRS()
 
-inline void HAL_init(void) { }
+inline void HAL_init() { }
 
 // Utility functions
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
-int freeMemory(void);
+int freeMemory();
 #pragma GCC diagnostic pop
 
 // ADC
 #define HAL_READ_ADC()         HAL_adc_get_result()
 #define HAL_ADC_READY()        true
 
-void HAL_adc_init(void);
+void HAL_adc_init();
 void HAL_adc_enable_channel(int pin);
 void HAL_adc_start_conversion(const uint8_t adc_pin);
-uint16_t HAL_adc_get_result(void);
+uint16_t HAL_adc_get_result();
 
 /* ---------------- Delay in cycles */
 FORCE_INLINE static void DELAY_CYCLES(uint64_t x) {

Marlin/src/HAL/HAL_LINUX/arduino.cpp

 #include "../shared/Delay.h"
 
 // Interrupts
-void cli(void) { } // Disable
-void sei(void) { }  // Enable
+void cli() { } // Disable
+void sei() { }  // Enable
 
 // Time functions
 void _delay_ms(const int delay_ms) {

Marlin/src/HAL/HAL_LINUX/include/Arduino.h

 #define constrain(value, arg_min, arg_max) ((value) < (arg_min) ? (arg_min) :((value) > (arg_max) ? (arg_max) : (value)))
 
 //Interrupts
-void cli(void); // Disable
-void sei(void); // Enable
-void attachInterrupt(uint32_t pin, void (*callback)(void), uint32_t mode);
+void cli(); // Disable
+void sei(); // Enable
+void attachInterrupt(uint32_t pin, void (*callback)(), uint32_t mode);
 void detachInterrupt(uint32_t pin);
 extern "C" void GpioEnableInt(uint32_t port, uint32_t pin, uint32_t mode);
 extern "C" void GpioDisableInt(uint32_t port, uint32_t pin);

Marlin/src/HAL/HAL_LINUX/include/serial.h

 
   void flush() { receive_buffer.clear(); }
 
-  uint8_t availableForWrite(void) {
+  uint8_t availableForWrite() {
     return transmit_buffer.free() > 255 ? 255 : (uint8_t)transmit_buffer.free();
   }
 
-  void flushTX(void) {
+  void flushTX() {
     if (host_connected)
       while (transmit_buffer.available()) { /* nada */ }
   }
   void println(unsigned long value, int nbase = 0) { print(value, nbase); println(); }
   void println(float value, int round = 6) { printf("%f\n" , value); }
   void println(double value, int round = 6) { printf("%f\n" , value); }
-  void println(void) { print('\n'); }
+  void println() { print('\n'); }
 
   volatile RingBuffer<uint8_t, 128> receive_buffer;
   volatile RingBuffer<uint8_t, 128> transmit_buffer;

Marlin/src/HAL/HAL_LINUX/main.cpp

   }
 }
 
-int main(void) {
+int main() {
   std::thread write_serial (write_serial_thread);
   std::thread read_serial (read_serial_thread);
 

Marlin/src/HAL/HAL_LINUX/timers.cpp

 
 Timer timers[2];
 
-void HAL_timer_init(void) {
+void HAL_timer_init() {
   timers[0].init(0, STEPPER_TIMER_RATE, TIMER0_IRQHandler);
   timers[1].init(1, TEMP_TIMER_RATE, TIMER1_IRQHandler);
 }

Marlin/src/HAL/HAL_LINUX/timers.h

 #define ENABLE_TEMPERATURE_INTERRUPT() HAL_timer_enable_interrupt(TEMP_TIMER_NUM)
 #define DISABLE_TEMPERATURE_INTERRUPT() HAL_timer_disable_interrupt(TEMP_TIMER_NUM)
 
-#define HAL_STEP_TIMER_ISR()  extern "C" void TIMER0_IRQHandler(void)
-#define HAL_TEMP_TIMER_ISR()  extern "C" void TIMER1_IRQHandler(void)
+#define HAL_STEP_TIMER_ISR()  extern "C" void TIMER0_IRQHandler()
+#define HAL_TEMP_TIMER_ISR()  extern "C" void TIMER1_IRQHandler()
 
 // PWM timer
 #define HAL_PWM_TIMER
-#define HAL_PWM_TIMER_ISR()   extern "C" void TIMER3_IRQHandler(void)
+#define HAL_PWM_TIMER_ISR()   extern "C" void TIMER3_IRQHandler()
 #define HAL_PWM_TIMER_IRQn
 
 
-void HAL_timer_init(void);
+void HAL_timer_init();
 void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
 
 void HAL_timer_set_compare(const uint8_t timer_num, const hal_timer_t compare);

Marlin/src/HAL/HAL_LINUX/watchdog.cpp

 
 #include "watchdog.h"
 
-void watchdog_init(void) {}
+void watchdog_init() {}
 
-void HAL_clear_reset_source(void) {}
+void HAL_clear_reset_source() {}
 
-uint8_t HAL_get_reset_source(void) {
+uint8_t HAL_get_reset_source() {
   return RST_POWER_ON;
 }
 
 void watchdog_reset() {}
 
 #else
-  void HAL_clear_reset_source(void) {}
-  uint8_t HAL_get_reset_source(void) { return RST_POWER_ON; }
+  void HAL_clear_reset_source() {}
+  uint8_t HAL_get_reset_source() { return RST_POWER_ON; }
 #endif // USE_WATCHDOG
 
 #endif // __PLAT_LINUX__

Marlin/src/HAL/HAL_LINUX/watchdog.h

 
 #define WDT_TIMEOUT   4000000 // 4 second timeout
 
-void watchdog_init(void);
-void watchdog_reset(void);
-void HAL_clear_reset_source(void);
-uint8_t HAL_get_reset_source(void);
+void watchdog_init();
+void watchdog_reset();
+void HAL_clear_reset_source();
+uint8_t HAL_get_reset_source();

Marlin/src/HAL/HAL_LPC1768/DebugMonitor.cpp

 #define sw_barrier() __asm__ volatile("": : :"memory");
 
 // (re)initialize UART0 as a monitor output to 250000,n,8,1
-static void TXBegin(void) {
+static void TXBegin() {
 }
 
 // Send character through UART with no interrupts
 }
 
 extern "C" {
-__attribute__((naked)) void NMI_Handler(void) {
+__attribute__((naked)) void NMI_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void HardFault_Handler(void) {
+__attribute__((naked)) void HardFault_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void MemManage_Handler(void) {
+__attribute__((naked)) void MemManage_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void BusFault_Handler(void) {
+__attribute__((naked)) void BusFault_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void UsageFault_Handler(void) {
+__attribute__((naked)) void UsageFault_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void DebugMon_Handler(void) {
+__attribute__((naked)) void DebugMon_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
 }
 
 /* This is NOT an exception, it is an interrupt handler - Nevertheless, the framing is the same */
-__attribute__((naked)) void WDT_IRQHandler(void) {
+__attribute__((naked)) void WDT_IRQHandler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")
   );
 }
 
-__attribute__((naked)) void RSTC_Handler(void) {
+__attribute__((naked)) void RSTC_Handler() {
   __asm__ __volatile__ (
     ".syntax unified" "\n\t"
     A("tst lr, #4")

Marlin/src/HAL/HAL_LPC1768/HAL.cpp

 extern "C" void u8g_xMicroDelay(uint16_t val) {
   DELAY_US(val);
 }
-extern "C" void u8g_MicroDelay(void) {
+extern "C" void u8g_MicroDelay() {
   u8g_xMicroDelay(1);
 }
-extern "C" void u8g_10MicroDelay(void) {
+extern "C" void u8g_10MicroDelay() {
   u8g_xMicroDelay(10);
 }
 extern "C" void u8g_Delay(uint16_t val) {

Marlin/src/HAL/HAL_LPC1768/HAL.h

 
 #define CPU_32_BIT
 
-void HAL_init(void);
+void HAL_init();
 
 #include <stdint.h>
 #include <stdarg.h>
 //
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
-int freeMemory(void);
+int freeMemory();
 #pragma GCC diagnostic pop
 
 //
 #define HAL_SENSITIVE_PINS P0_06, P0_07, P0_08, P0_09
 
 #define HAL_IDLETASK 1
-void HAL_idletask(void);
+void HAL_idletask();
 
 #define PLATFORM_M997_SUPPORT
 void flashFirmware(int16_t value);

Marlin/src/HAL/HAL_LPC1768/MarlinSerial.cpp

 
 #if (defined(SERIAL_PORT) && SERIAL_PORT == 0) || (defined(SERIAL_PORT_2) && SERIAL_PORT_2 == 0)
   MarlinSerial MSerial(LPC_UART0);
-  extern "C" void UART0_IRQHandler(void) {
+  extern "C" void UART0_IRQHandler() {
     MSerial.IRQHandler();
   }
 #endif
 
 #if (defined(SERIAL_PORT) && SERIAL_PORT == 1) || (defined(SERIAL_PORT_2) && SERIAL_PORT_2 == 1)
   MarlinSerial MSerial1((LPC_UART_TypeDef *) LPC_UART1);
-  extern "C" void UART1_IRQHandler(void) {
+  extern "C" void UART1_IRQHandler() {
     MSerial1.IRQHandler();
   }
 #endif
 
 #if (defined(SERIAL_PORT) && SERIAL_PORT == 2) || (defined(SERIAL_PORT_2) && SERIAL_PORT_2 == 2)
   MarlinSerial MSerial2(LPC_UART2);
-  extern "C" void UART2_IRQHandler(void) {
+  extern "C" void UART2_IRQHandler() {
     MSerial2.IRQHandler();
   }
 #endif
 
 #if (defined(SERIAL_PORT) && SERIAL_PORT == 3) || (defined(SERIAL_PORT_2) && SERIAL_PORT_2 == 3)
   MarlinSerial MSerial3(LPC_UART3);
-  extern "C" void UART3_IRQHandler(void) {
+  extern "C" void UART3_IRQHandler() {
     MSerial3.IRQHandler();
   }
 #endif

Marlin/src/HAL/HAL_LPC1768/endstop_interrupts.h

 #include "../../module/endstops.h"
 
 // One ISR for all EXT-Interrupts
-void endstop_ISR(void) { endstops.update(); }
+void endstop_ISR() { endstops.update(); }
 
-void setup_endstop_interrupts(void) {
+void setup_endstop_interrupts() {
   #define _ATTACH(P) attachInterrupt(digitalPinToInterrupt(P), endstop_ISR, CHANGE)
   #if HAS_X_MAX
     #if !LPC1768_PIN_INTERRUPT_M(X_MAX_PIN)

Marlin/src/HAL/HAL_LPC1768/include/digipot_mcp4451_I2C_routines.c

   return 1;
 }
 
-void digipot_mcp4451_init(void) {
+void digipot_mcp4451_init() {
   /**
    * Init I2C pin connect
    */

Marlin/src/HAL/HAL_LPC1768/include/digipot_mcp4451_I2C_routines.h

 #include <lpc17xx_libcfg_default.h>
 
 uint8_t digipot_mcp4451_start(uint8_t sla);
-void digipot_mcp4451_init(void);
+void digipot_mcp4451_init();
 uint8_t digipot_mcp4451_send_byte(uint8_t data);
 
 #ifdef __cplusplus

Marlin/src/HAL/HAL_LPC1768/main.cpp

 
 extern uint32_t MSC_SD_Init(uint8_t pdrv);
 extern "C" int isLPC1769();
-extern "C" void disk_timerproc(void);
+extern "C" void disk_timerproc();
 
 void SysTick_Callback() { disk_timerproc(); }
 
-void HAL_init(void) {
+void HAL_init() {
 
   // Init LEDs
   #if PIN_EXISTS(LED)
 }
 
 // HAL idle task
-void HAL_idletask(void) {
+void HAL_idletask() {
   #if ENABLED(SHARED_SD_CARD)
     // If Marlin is using the SD card we need to lock it to prevent access from
     // a PC via USB.

Marlin/src/HAL/HAL_LPC1768/timers.cpp

 #include "../../inc/MarlinConfig.h"
 #include "timers.h"
 
-void HAL_timer_init(void) {
+void HAL_timer_init() {
   SBI(LPC_SC->PCONP, SBIT_TIMER0);  // Power ON Timer 0
   LPC_TIM0->PR = (HAL_TIMER_RATE) / (STEPPER_TIMER_RATE) - 1; // Use prescaler to set frequency if needed
 

Marlin/src/HAL/HAL_LPC1768/timers.h

 
 #define _HAL_TIMER(T) _CAT(LPC_TIM, T)
 #define _HAL_TIMER_IRQ(T) TIMER##T##_IRQn
-#define __HAL_TIMER_ISR(T) extern "C" void TIMER##T##_IRQHandler(void)
+#define __HAL_TIMER_ISR(T) extern "C" void TIMER##T##_IRQHandler()
 #define _HAL_TIMER_ISR(T)  __HAL_TIMER_ISR(T)
 
 typedef uint32_t hal_timer_t;
 // ------------------------
 // Public functions
 // ------------------------
-void HAL_timer_init(void);
+void HAL_timer_init();
 void HAL_timer_start(const uint8_t timer_num, const uint32_t frequency);
 
 FORCE_INLINE static void HAL_timer_set_compare(const uint8_t timer_num, const hal_timer_t compare) {

Marlin/src/HAL/HAL_LPC1768/u8g/LCD_I2C_routines.c

   return 1;
 }
 
-void u8g_i2c_stop(void) {
+void u8g_i2c_stop() {
 }
 
 

Marlin/src/HAL/HAL_LPC1768/u8g/LCD_I2C_routines.h

 uint8_t u8g_i2c_wait(uint8_t mask, uint8_t pos);
 uint8_t u8g_i2c_start(uint8_t sla);
 uint8_t u8g_i2c_send_byte(uint8_t data);
-void u8g_i2c_stop(void);
+void u8g_i2c_stop();

Marlin/src/HAL/HAL_LPC1768/u8g/LCD_delay.h

 #endif
 
 void U8g_delay(int msec);
-void u8g_MicroDelay(void);
-void u8g_10MicroDelay(void);
+void u8g_MicroDelay();
+void u8g_10MicroDelay();
 
 #ifdef __cplusplus
   }

Marlin/src/HAL/HAL_LPC1768/u8g/u8g_com_HAL_LPC1768_ssd_sw_i2c.cpp under construction

 }
 
 
-void u8g_i2c_stop_sw(void) { }
+void u8g_i2c_stop_sw() { }
 
 void u8g_i2c_init_sw(uint8_t clock_option) { u8g_i2c_start(0); } // send slave address and write bit
 

Marlin/src/HAL/HAL_LPC1768/watchdog.cpp

 #include "lpc17xx_wdt.h"
 #include "watchdog.h"
 
-void watchdog_init(void) {
+void watchdog_init() {
   #if ENABLED(WATCHDOG_RESET_MANUAL)
     // We enable the watchdog timer, but only for the interrupt.
 
   WDT_Start(WDT_TIMEOUT);
 }
 
-void HAL_clear_reset_source(void) {
+void HAL_clear_reset_source() {
   WDT_ClrTimeOutFlag();
 }
 
-uint8_t HAL_get_reset_source(void) {
+uint8_t HAL_get_reset_source() {
   if (TEST(WDT_ReadTimeOutFlag(), 0)) return RST_WATCHDOG;
   return RST_POWER_ON;
 }
 
 #else
 
-void watchdog_init(void) {}
-void watchdog_reset(void) {}
-void HAL_clear_reset_source(void) {}
-uint8_t HAL_get_reset_source(void) { return RST_POWER_ON; }
+void watchdog_init() {}
+void watchdog_reset() {}
+void HAL_clear_reset_source() {}
+uint8_t HAL_get_reset_source() { return RST_POWER_ON; }
 
 #endif // USE_WATCHDOG
 

Marlin/src/HAL/HAL_LPC1768/watchdog.h

 
 #define WDT_TIMEOUT   4000000 // 4 second timeout
 
-void watchdog_init(void);
-void watchdog_reset(void);
-void HAL_clear_reset_source(void);
-uint8_t HAL_get_reset_source(void);
+void watchdog_init();
+void watchdog_reset();
+void HAL_clear_reset_source();
+uint8_t HAL_get_reset_source();

Marlin/src/HAL/HAL_SAMD51/HAL.cpp

 // ------------------------
 
 // HAL initialization task
-void HAL_init(void) {
+void HAL_init() {
   #if DMA_IS_REQUIRED
     dma_init();
   #endif
 
 // HAL idle task
 /*
-void HAL_idletask(void) {
+void HAL_idletask() {
 }
 */
 
-void HAL_clear_reset_source(void) { }
+void HAL_clear_reset_source() { }
 
 #pragma push_macro("WDT")
 #undef WDT    // Required to be able to use '.bit.WDT'. Compiler wrongly replace struct field with WDT define
-uint8_t HAL_get_reset_source(void) {
+uint8_t HAL_get_reset_source() {
   RSTC_RCAUSE_Type resetCause;
 
   resetCause.reg = REG_RSTC_RCAUSE;
 // ADC
 // ------------------------
 
-void HAL_adc_init(void) {
+void HAL_adc_init() {
   #if ADC_IS_REQUIRED
     memset(HAL_adc_results, 0xFF, sizeof(HAL_adc_results));                 // Fill result with invalid values
 
   HAL_adc_result = 0xFFFF;
 }
 
-uint16_t HAL_adc_get_result(void) {
+uint16_t HAL_adc_get_result() {
   return HAL_adc_result;
 }
 

Marlin/src/HAL/HAL_SAMD51/HAL.h

 #define cli() __disable_irq()       // Disable interrupts
 #define sei() __enable_irq()        // Enable interrupts
 
-void HAL_clear_reset_source(void);  // clear reset reason
-uint8_t HAL_get_reset_source(void); // get reset reason
+void HAL_clear_reset_source();  // clear reset reason
+uint8_t HAL_get_reset_source(); // get reset reason
 
 //
 // EEPROM
 
 #define HAL_ANALOG_SELECT(pin)
 
-void HAL_adc_init(void);
+void HAL_adc_init();
 
 #define HAL_START_ADC(pin)  HAL_adc_start_conversion(pin)
 #define HAL_READ_ADC()      HAL_adc_result
 #define HAL_ADC_READY()     true
 
 void HAL_adc_start_conversion(const uint8_t adc_pin);
-uint16_t HAL_adc_get_result(void);
+uint16_t HAL_adc_get_result();
 
 //
 // Pin Map
 void noTone(const pin_t _pin);
 
 // Enable hooks into idle and setup for HAL
-void HAL_init(void);
+void HAL_init();
 /*
 #define HAL_IDLETASK 1
-void HAL_idletask(void);
+void HAL_idletask();
 */
 
 //
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
-int freeMemory(void);
+int freeMemory();
 #pragma GCC diagnostic pop
 
 #ifdef __cplusplus

Marlin/src/HAL/HAL_SAMD51/HAL_SPI.cpp

   // ------------------------
   // Hardware SPI
   // ------------------------
-  void spiBegin(void) {
+  void spiBegin() {
     spiInit(SPI_HALF_SPEED);
   }
 
    *
    * @details
    */
-  uint8_t spiRec(void) {
+  uint8_t spiRec() {
     sdSPI.beginTransaction(spiConfig);
     uint8_t returnByte = sdSPI.transfer(0xFF);
     sdSPI.endTransaction();

Marlin/src/HAL/HAL_SAMD51/endstop_interrupts.h

                                  && !MATCH_Z_MIN_PROBE_EILINE(P))
 
 // One ISR for all EXT-Interrupts
-void endstop_ISR(void) { endstops.update(); }
+void endstop_ISR() { endstops.update(); }
 
-void setup_endstop_interrupts(void) {
+void setup_endstop_interrupts() {
   #if HAS_X_MAX
     #if !AVAILABLE_EILINE(X_MAX_PIN)
       static_assert(false, "X_MAX_PIN has no EXTINT line available.");

Marlin/src/HAL/HAL_SAMD51/watchdog.cpp

 
   #include "watchdog.h"
 
-  void watchdog_init(void) {
+  void watchdog_init() {
     // The low-power oscillator used by the WDT runs at 32,768 Hz with
     // a 1:32 prescale, thus 1024 Hz, though probably not super precise.
 

Marlin/src/HAL/HAL_STM32/HAL.cpp

 #endif
 
 // HAL initialization task
-void HAL_init(void) {
+void HAL_init() {
   FastIO_init();
 
   #if ENABLED(SDSUPPORT)
   #endif // EEPROM_EMULATED_SRAM
 }
 
-void HAL_clear_reset_source(void) { __HAL_RCC_CLEAR_RESET_FLAGS(); }
+void HAL_clear_reset_source() { __HAL_RCC_CLEAR_RESET_FLAGS(); }
 
-uint8_t HAL_get_reset_source(void) {
+uint8_t HAL_get_reset_source() {
   if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST) != RESET) return RST_WATCHDOG;
   if (__HAL_RCC_GET_FLAG(RCC_FLAG_SFTRST) != RESET)  return RST_SOFTWARE;
   if (__HAL_RCC_GET_FLAG(RCC_FLAG_PINRST) != RESET)  return RST_EXTERNAL;
   HAL_adc_result = analogRead(adc_pin);
 }
 
-uint16_t HAL_adc_get_result(void) {
+uint16_t HAL_adc_get_result() {
   return HAL_adc_result;
 }
 

Marlin/src/HAL/HAL_STM32/HAL.h

 #define __bss_end __bss_end__
 
 // Enable hooks into  setup for HAL
-void HAL_init(void);
+void HAL_init();
 
 // Clear reset reason
-void HAL_clear_reset_source(void);
+void HAL_clear_reset_source();
 
 // Reset reason
-uint8_t HAL_get_reset_source(void);
+uint8_t HAL_get_reset_source();
 
 void _delay_ms(const int delay);
 
 
 #define HAL_ANALOG_SELECT(pin) pinMode(pin, INPUT)
 
-inline void HAL_adc_init(void) {}
+inline void HAL_adc_init() {}
 
 #define HAL_START_ADC(pin)  HAL_adc_start_conversion(pin)
 #define HAL_READ_ADC()      HAL_adc_result
 
 void HAL_adc_start_conversion(const uint8_t adc_pin);
 
-uint16_t HAL_adc_get_result(void);
+uint16_t HAL_adc_get_result();
 
 #define GET_PIN_MAP_PIN(index) index
 #define GET_PIN_MAP_INDEX(pin) pin

Marlin/src/HAL/HAL_STM32/HAL_SPI.cpp

  *
  * @details Only configures SS pin since stm32duino creates and initialize the SPI object
  */
-void spiBegin(void) {
+void spiBegin() {
   #if !PIN_EXISTS(SS)
     #error "SS_PIN not defined!"
   #endif
  *
  * @details
  */
-uint8_t spiRec(void) {
+uint8_t spiRec() {
   SPI.beginTransaction(spiConfig);
   uint8_t returnByte = SPI.transfer(0xFF);
   SPI.endTransaction();

Marlin/src/HAL/HAL_STM32/endstop_interrupts.h

 #include "../../module/endstops.h"
 
 // One ISR for all EXT-Interrupts
-void endstop_ISR(void) { endstops.update(); }
+void endstop_ISR() { endstops.update(); }
 
-void setup_endstop_interrupts(void) {
+void setup_endstop_interrupts() {
   #if HAS_X_MAX
     attachInterrupt(X_MAX_PIN, endstop_ISR, CHANGE);
   #endif

Marlin/src/HAL/HAL_STM32F1/HAL.cpp

     #if SERIAL_PORT > 0
       #if SERIAL_PORT2
         #if SERIAL_PORT2 > 0
-          void board_setup_usb(void) {}
+          void board_setup_usb() {}
         #endif
       #else
-        void board_setup_usb(void) {}
+        void board_setup_usb() {}
       #endif
     #endif
   } }
 #endif
 
-void HAL_init(void) {
+void HAL_init() {
   NVIC_SetPriorityGrouping(0x3);
   #if PIN_EXISTS(LED)
     OUT_WRITE(LED_PIN, LOW);
 }
 
 // HAL idle task
-void HAL_idletask(void) {
+void HAL_idletask() {
   #ifdef USE_USB_COMPOSITE
     #if ENABLED(SHARED_SD_CARD)
       // If Marlin is using the SD card we need to lock it to prevent access from
 
 /* VGPV Done with defines
 // disable interrupts
-void cli(void) { noInterrupts(); }
+void cli() { noInterrupts(); }
 
 // enable interrupts
-void sei(void) { interrupts(); }
+void sei() { interrupts(); }
 */
 
-void HAL_clear_reset_source(void) { }
+void HAL_clear_reset_source() { }
 
 /**
  * TODO: Check this and change or remove.
  * currently returns 1 that's equal to poweron reset.
  */
-uint8_t HAL_get_reset_source(void) { return 1; }
+uint8_t HAL_get_reset_source() { return 1; }
 
 void _delay_ms(const int delay_ms) { delay(delay_ms); }
 
 // ADC
 // ------------------------
 // Init the AD in continuous capture mode
-void HAL_adc_init(void) {
+void HAL_adc_init() {
   // configure the ADC
   adc.calibrate();
   #if F_CPU > 72000000
   HAL_adc_result = (HAL_adc_results[(int)pin_index] >> 2) & 0x3FF; // shift to get 10 bits only.
 }
 
-uint16_t HAL_adc_get_result(void) { return HAL_adc_result; }
+uint16_t HAL_adc_get_result() { return HAL_adc_result; }
 
 uint16_t analogRead(pin_t pin) {
   const bool is_analog = _GET_MODE(pin) == GPIO_INPUT_ANALOG;

Marlin/src/HAL/HAL_STM32F1/HAL.h

 #endif
 
 // Set interrupt grouping for this MCU
-void HAL_init(void);
+void HAL_init();
 #define HAL_IDLETASK 1
-void HAL_idletask(void);
+void HAL_idletask();
 
 /**
  * TODO: review this to return 1 for pins that are not analog input
 #define __bss_end __bss_end__
 
 // Clear reset reason
-void HAL_clear_reset_source(void);
+void HAL_clear_reset_source();
 
 // Reset reason
-uint8_t HAL_get_reset_source(void);
+uint8_t HAL_get_reset_source();
 
 void _delay_ms(const int delay);
 
 
 /*
 extern "C" {
-  int freeMemory(void);
+  int freeMemory();
 }
 */
 
 
 #define HAL_ANALOG_SELECT(pin) pinMode(pin, INPUT_ANALOG);
 
-void HAL_adc_init(void);
+void HAL_adc_init();
 
 #define HAL_START_ADC(pin)  HAL_adc_start_conversion(pin)
 #define HAL_READ_ADC()      HAL_adc_result
 #define HAL_ADC_READY()     true
 
 void HAL_adc_start_conversion(const uint8_t adc_pin);
-uint16_t HAL_adc_get_result(void);
+uint16_t HAL_adc_get_result();
 
 uint16_t analogRead(pin_t pin); // need HAL_ANALOG_SELECT() first
 void analogWrite(pin_t pin, int pwm_val8); // PWM only! mul by 257 in maple!?

Marlin/src/HAL/HAL_STM32F1/HAL_SPI.cpp

  *
  * @details
  */
-uint8_t spiRec(void) {
+uint8_t spiRec() {
   uint8_t returnByte = SPI.transfer(ff);
   return returnByte;
 }

Marlin/src/HAL/HAL_STM32F1/SPI.cpp

  *  New functions added to manage callbacks.
  *  Victor Perez 2017
  */
-void SPIClass::onReceive(void(*callback)(void)) {
+void SPIClass::onReceive(void(*callback)()) {
   _currentSetting->receiveCallback = callback;
   if (callback) {
     switch (_currentSetting->spi_d->clk_id) {
   }
 }
 
-void SPIClass::onTransmit(void(*callback)(void)) {
+void SPIClass::onTransmit(void(*callback)()) {
   _currentSetting->transmitCallback = callback;
   if (callback) {
     switch (_currentSetting->spi_d->clk_id) {

Marlin/src/HAL/HAL_STM32F1/SPI.h

   spi_dev *spi_d;
   dma_channel spiRxDmaChannel, spiTxDmaChannel;
   dma_dev* spiDmaDev;
-  void (*receiveCallback)(void) = NULL;
-  void (*transmitCallback)(void) = NULL;
+  void (*receiveCallback)() = NULL;
+  void (*transmitCallback)() = NULL;
 
   friend class SPIClass;
 };
    * onTransmit used to set the callback in case of dmaSend (tx only). That function
    * will NOT be called in case of TX/RX
    */
-  void onReceive(void(*)(void));
-  void onTransmit(void(*)(void));
+  void onReceive(void(*)());
+  void onTransmit(void(*)());
 
   /*
    * I/O
    * @brief Get a pointer to the underlying libmaple spi_dev for
    *        this HardwareSPI instance.
    */
-  spi_dev* c_dev(void) { return _currentSetting->spi_d; }
+  spi_dev* c_dev() { return _currentSetting->spi_d; }
 
   spi_dev* dev() { return _currentSetting->spi_d; }
 

Marlin/src/HAL/HAL_STM32F1/Servo.cpp

 }
 
 #ifdef SERVO0_TIMER_NUM
-  extern "C" void Servo_IRQHandler(void) {
+  extern "C" void Servo_IRQHandler() {
     static timer_dev *tdev = get_timer_dev(SERVO0_TIMER_NUM);
     uint16_t SR = timer_get_status(tdev);
     if (SR & TIMER_SR_CC1IF) { // channel 1 off

Marlin/src/HAL/HAL_STM32F1/dogm/u8g_com_stm32duino_fsmc.cpp

 #define __ASM __asm
 #define __STATIC_INLINE static inline
 
-__attribute__((always_inline)) __STATIC_INLINE void __DSB(void) {
+__attribute__((always_inline)) __STATIC_INLINE void __DSB() {
   __ASM volatile ("dsb 0xF":::"memory");
 }
 

Marlin/src/HAL/HAL_STM32F1/endstop_interrupts.h

 #include "../../module/endstops.h"
 
 // One ISR for all EXT-Interrupts
-void endstop_ISR(void) { endstops.update(); }
+void endstop_ISR() { endstops.update(); }
 
-void setup_endstop_interrupts(void) {
+void setup_endstop_interrupts() {
   #if HAS_X_MAX
     attachInterrupt(X_MAX_PIN, endstop_ISR, CHANGE); // assign it
   #endif

Marlin/src/HAL/HAL_STM32F1/onboard_sd.cpp

 /* Deselect card and release SPI                                         */
 /*-----------------------------------------------------------------------*/
 
-static void deselect(void) {
+static void deselect() {
   CS_HIGH();    /* CS = H */
   xchg_spi(0xFF); /* Dummy clock (force DO hi-z for multiple slave SPI) */
 }
 /* Select card and wait for ready                                        */
 /*-----------------------------------------------------------------------*/
 
-static int select(void) { /* 1:OK, 0:Timeout */
+static int select() { /* 1:OK, 0:Timeout */
   CS_LOW();   /* CS = L */
   xchg_spi(0xFF); /* Dummy clock (force DO enabled) */
 
 /* Control SPI module (Platform dependent)                               */
 /*-----------------------------------------------------------------------*/
 
-static void power_on(void) {  /* Enable SSP module and attach it to I/O pads */
+static void power_on() {  /* Enable SSP module and attach it to I/O pads */
   ONBOARD_SD_SPI.setModule(ON_BOARD_SPI_DEVICE);
   ONBOARD_SD_SPI.begin();
   ONBOARD_SD_SPI.setBitOrder(MSBFIRST);
   OUT_WRITE(ONBOARD_SD_CS_PIN, HIGH); /* Set CS# high */
 }
 
-static void power_off(void) {   /* Disable SPI function */
+static void power_off() {   /* Disable SPI function */
   select();       /* Wait for card ready */
   deselect();
 }

Marlin/src/HAL/HAL_STM32F1/sdio.cpp

 
 SDIO_CardInfoTypeDef SdCard;
 
-bool SDIO_Init(void) {
+bool SDIO_Init() {
   uint32_t count = 0U;
   SdCard.CardType = SdCard.CardVersion = SdCard.Class = SdCard.RelCardAdd = SdCard.BlockNbr = SdCard.BlockSize = SdCard.LogBlockNbr = SdCard.LogBlockSize = 0;
 
   return false;
 }
 
-inline uint32_t SDIO_GetCardState(void) { return SDIO_CmdSendStatus(SdCard.RelCardAdd << 16U) ? (SDIO_GetResponse(SDIO_RESP1) >> 9U) & 0x0FU : SDIO_CARD_ERROR; }
+inline uint32_t SDIO_GetCardState() { return SDIO_CmdSendStatus(SdCard.RelCardAdd << 16U) ? (SDIO_GetResponse(SDIO_RESP1) >> 9U) & 0x0FU : SDIO_CARD_ERROR; }
 
 // ------------------------
 // SD Commands and Responses
 // ------------------------
 
 void SDIO_SendCommand(uint16_t command, uint32_t argument) { SDIO->ARG = argument; SDIO->CMD = (uint32_t)(SDIO_CMD_CPSMEN | command); }
-uint8_t SDIO_GetCommandResponse(void) { return (uint8_t)(SDIO->RESPCMD); }
+uint8_t SDIO_GetCommandResponse() { return (uint8_t)(SDIO->RESPCMD); }
 uint32_t SDIO_GetResponse(uint32_t response) { return SDIO->RESP[response]; }
 
-bool SDIO_CmdGoIdleState(void) { SDIO_SendCommand(CMD0_GO_IDLE_STATE, 0); return SDIO_GetCmdError(); }
-bool SDIO_CmdSendCID(void) { SDIO_SendCommand(CMD2_ALL_SEND_CID, 0); return SDIO_GetCmdResp2(); }
+bool SDIO_CmdGoIdleState() { SDIO_SendCommand(CMD0_GO_IDLE_STATE, 0); return SDIO_GetCmdError(); }
+bool SDIO_CmdSendCID() { SDIO_SendCommand(CMD2_ALL_SEND_CID, 0); return SDIO_GetCmdResp2(); }
 bool SDIO_CmdSetRelAdd(uint32_t *rca) { SDIO_SendCommand(CMD3_SET_REL_ADDR, 0); return SDIO_GetCmdResp6(SDMMC_CMD_SET_REL_ADDR, rca); }
 bool SDIO_CmdSelDesel(uint32_t address) { SDIO_SendCommand(CMD7_SEL_DESEL_CARD, address); return SDIO_GetCmdResp1(SDMMC_CMD_SEL_DESEL_CARD); }
-bool SDIO_CmdOperCond(void) { SDIO_SendCommand(CMD8_HS_SEND_EXT_CSD, SDMMC_CHECK_PATTERN); return SDIO_GetCmdResp7(); }
+bool SDIO_CmdOperCond() { SDIO_SendCommand(CMD8_HS_SEND_EXT_CSD, SDMMC_CHECK_PATTERN); return SDIO_GetCmdResp7(); }
 bool SDIO_CmdSendCSD(uint32_t argument) { SDIO_SendCommand(CMD9_SEND_CSD, argument); return SDIO_GetCmdResp2(); }
 bool SDIO_CmdSendStatus(uint32_t argument) { SDIO_SendCommand(CMD13_SEND_STATUS, argument); return SDIO_GetCmdResp1(SDMMC_CMD_SEND_STATUS); }
 bool SDIO_CmdReadSingleBlock(uint32_t address) { SDIO_SendCommand(CMD17_READ_SINGLE_BLOCK, address); return SDIO_GetCmdResp1(SDMMC_CMD_READ_SINGLE_BLOCK); }
   do { if (!--count) return false; } while (!SDIO_GET_FLAG(FLAGS)); \
 }while(0)
 
-bool SDIO_GetCmdError(void) {
+bool SDIO_GetCmdError() {
   SDIO_WAIT(SDIO_STA_CMDSENT);
 
   SDIO_CLEAR_FLAG(SDIO_ICR_CMD_FLAGS);
   return (SDIO_GetResponse(SDIO_RESP1) & SDMMC_OCR_ERRORBITS) == SDMMC_ALLZERO;
 }
 
-bool SDIO_GetCmdResp2(void) {
+bool SDIO_GetCmdResp2() {
   SDIO_WAIT(SDIO_STA_CCRCFAIL | SDIO_STA_CMDREND | SDIO_STA_CTIMEOUT);
 
   if (SDIO_GET_FLAG(SDIO_STA_CCRCFAIL | SDIO_STA_CTIMEOUT)) {
   return true;
 }
 
-bool SDIO_GetCmdResp3(void) {
+bool SDIO_GetCmdResp3() {
   SDIO_WAIT(SDIO_STA_CCRCFAIL | SDIO_STA_CMDREND | SDIO_STA_CTIMEOUT);
 
   if (SDIO_GET_FLAG(SDIO_STA_CTIMEOUT)) {
   return true;
 }
 
-bool SDIO_GetCmdResp7(void) {
+bool SDIO_GetCmdResp7() {
   SDIO_WAIT(SDIO_STA_CCRCFAIL | SDIO_STA_CMDREND | SDIO_STA_CTIMEOUT);
 
   if (SDIO_GET_FLAG(SDIO_STA_CTIMEOUT)) {

Marlin/src/HAL/HAL_STM32F1/sdio.h

 // Public functions
 // ------------------------
 
-inline uint32_t SDIO_GetCardState(void);
+inline uint32_t SDIO_GetCardState();
 
-bool SDIO_CmdGoIdleState(void);
-bool SDIO_CmdSendCID(void);
+bool SDIO_CmdGoIdleState();
+bool SDIO_CmdSendCID();
 bool SDIO_CmdSetRelAdd(uint32_t *rca);
 bool SDIO_CmdSelDesel(uint32_t address);
-bool SDIO_CmdOperCond(void);
+bool SDIO_CmdOperCond();
 bool SDIO_CmdSendCSD(uint32_t argument);
 bool SDIO_CmdSendStatus(uint32_t argument);
 bool SDIO_CmdReadSingleBlock(uint32_t address);
 bool SDIO_CmdAppSetClearCardDetect(uint32_t rsa);
 
 void SDIO_SendCommand(uint16_t command, uint32_t argument);
-uint8_t SDIO_GetCommandResponse(void);
+uint8_t SDIO_GetCommandResponse();
 uint32_t SDIO_GetResponse(uint32_t response);
-bool SDIO_GetCmdError(void);
+bool SDIO_GetCmdError();
 bool SDIO_GetCmdResp1(uint8_t command);
-bool SDIO_GetCmdResp2(void);
-bool SDIO_GetCmdResp3(void);
+bool SDIO_GetCmdResp2();
+bool SDIO_GetCmdResp3();
 bool SDIO_GetCmdResp6(uint8_t command, uint32_t *rca);
-bool SDIO_GetCmdResp7(void);
+bool SDIO_GetCmdResp7();

Marlin/src/HAL/HAL_STM32F1/timers.h

 
 // TODO change this
 
-#define HAL_TEMP_TIMER_ISR() extern "C" void tempTC_Handler(void)
-#define HAL_STEP_TIMER_ISR() extern "C" void stepTC_Handler(void)
+#define HAL_TEMP_TIMER_ISR() extern "C" void tempTC_Handler()
+#define HAL_STEP_TIMER_ISR() extern "C" void stepTC_Handler()
 
-extern "C" void tempTC_Handler(void);
-extern "C" void stepTC_Handler(void);
+extern "C" void tempTC_Handler();
+extern "C" void stepTC_Handler();
 
 // ------------------------
 // Public Variables

Marlin/src/HAL/HAL_STM32F1/watchdog.cpp

   iwdg_feed();
 }
 
-void watchdogSetup(void) {
+void watchdogSetup() {
   // do whatever. don't remove this function.
 }
 
  *
  * @details The watchdog clock is 40Khz. We need a 4 seconds interval, so use a /256 preescaler and 625 reload value (counts down to 0)
  */
-void watchdog_init(void) {
+void watchdog_init() {
   //iwdg_init(IWDG_PRE_256, STM32F1_WD_RELOAD);
 }
 

Marlin/src/HAL/HAL_STM32_F4_F7/HAL.cpp

 
 /* VGPV Done with defines
 // disable interrupts
-void cli(void) { noInterrupts(); }
+void cli() { noInterrupts(); }
 
 // enable interrupts
-void sei(void) { interrupts(); }
+void sei() { interrupts(); }
 */
 
-void HAL_clear_reset_source(void) { __HAL_RCC_CLEAR_RESET_FLAGS(); }
+void HAL_clear_reset_source() { __HAL_RCC_CLEAR_RESET_FLAGS(); }
 
-uint8_t HAL_get_reset_source(void) {
+uint8_t HAL_get_reset_source() {
   if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST) != RESET) return RST_WATCHDOG;
   if (__HAL_RCC_GET_FLAG(RCC_FLAG_SFTRST)  != RESET) return RST_SOFTWARE;
   if (__HAL_RCC_GET_FLAG(RCC_FLAG_PINRST)  != RESET) return RST_EXTERNAL;
 
 void HAL_adc_start_conversion(const uint8_t adc_pin) { HAL_adc_result = analogRead(adc_pin); }
 
-uint16_t HAL_adc_get_result(void) { return HAL_adc_result; }
+uint16_t HAL_adc_get_result() { return HAL_adc_result; }
 
 #endif // STM32GENERIC && (STM32F4 || STM32F7)

Marlin/src/HAL/HAL_STM32_F4_F7/HAL.h

 // Memory related
 #define __bss_end __bss_end__
 
-inline void HAL_init(void) { }
+inline void HAL_init() { }
 
 // Clear reset reason
-void HAL_clear_reset_source(void);
+void HAL_clear_reset_source();
 
 // Reset reason
-uint8_t HAL_get_reset_source(void);
+uint8_t HAL_get_reset_source();
 
 void _delay_ms(const int delay);
 
 /*
 extern "C" {
-  int freeMemory(void);
+  int freeMemory();
 }
 */
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
 
-static inline int freeMemory(void) {
+static inline int freeMemory() {
   volatile char top;
   return &top - reinterpret_cast<char*>(_sbrk(0));
 }
 
 #define HAL_ANALOG_SELECT(pin) pinMode(pin, INPUT)
 
-inline void HAL_adc_init(void) {}
+inline void HAL_adc_init() {}
 
 #define HAL_START_ADC(pin)  HAL_adc_start_conversion(pin)
 #define HAL_READ_ADC()      HAL_adc_result
 #define HAL_ADC_READY()     true
 
 void HAL_adc_start_conversion(const uint8_t adc_pin);
-uint16_t HAL_adc_get_result(void);
+uint16_t HAL_adc_get_result();
 
 #define GET_PIN_MAP_PIN(index) index
 #define GET_PIN_MAP_INDEX(pin) pin

Marlin/src/HAL/HAL_STM32_F4_F7/HAL_SPI.cpp

  *
  * @details Only configures SS pin since libmaple creates and initialize the SPI object
  */
-void spiBegin(void) {
+void spiBegin() {
   #if !defined(SS_PIN) || SS_PIN < 0
     #error SS_PIN not defined!
   #endif
  *
  * @details
  */
-uint8_t spiRec(void) {
+uint8_t spiRec() {
   SPI.beginTransaction(spiConfig);
   uint8_t returnByte = SPI.transfer(0xFF);
   SPI.endTransaction();