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- /**
- * Marlin 3D Printer Firmware
- *
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * SAMD51 HAL developed by Giuliano Zaro (AKA GMagician)
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <https://www.gnu.org/licenses/>.
- *
- */
- #ifdef __SAMD51__
-
- #include "../../inc/MarlinConfig.h"
- #include <Adafruit_ZeroDMA.h>
- #include <wiring_private.h>
-
- #ifdef ADAFRUIT_GRAND_CENTRAL_M4
- #if USING_HW_SERIALUSB
- DefaultSerial1 MSerial0(false, Serial);
- #endif
- #if USING_HW_SERIAL0
- DefaultSerial2 MSerial1(false, Serial1);
- #endif
- #if USING_HW_SERIAL1
- DefaultSerial3 MSerial2(false, Serial2);
- #endif
- #if USING_HW_SERIAL2
- DefaultSerial4 MSerial3(false, Serial3);
- #endif
- #if USING_HW_SERIAL3
- DefaultSerial5 MSerial4(false, Serial4);
- #endif
- #endif
-
- #define GET_TEMP_0_ADC() TERN(HAS_TEMP_ADC_0, PIN_TO_ADC(TEMP_0_PIN), -1)
- #define GET_TEMP_1_ADC() TERN(HAS_TEMP_ADC_1, PIN_TO_ADC(TEMP_1_PIN), -1)
- #define GET_TEMP_2_ADC() TERN(HAS_TEMP_ADC_2, PIN_TO_ADC(TEMP_2_PIN), -1)
- #define GET_TEMP_3_ADC() TERN(HAS_TEMP_ADC_3, PIN_TO_ADC(TEMP_3_PIN), -1)
- #define GET_TEMP_4_ADC() TERN(HAS_TEMP_ADC_4, PIN_TO_ADC(TEMP_4_PIN), -1)
- #define GET_TEMP_5_ADC() TERN(HAS_TEMP_ADC_5, PIN_TO_ADC(TEMP_5_PIN), -1)
- #define GET_TEMP_6_ADC() TERN(HAS_TEMP_ADC_6, PIN_TO_ADC(TEMP_6_PIN), -1)
- #define GET_TEMP_7_ADC() TERN(HAS_TEMP_ADC_7, PIN_TO_ADC(TEMP_7_PIN), -1)
- #define GET_BED_ADC() TERN(HAS_TEMP_ADC_BED, PIN_TO_ADC(TEMP_BED_PIN), -1)
- #define GET_CHAMBER_ADC() TERN(HAS_TEMP_ADC_CHAMBER, PIN_TO_ADC(TEMP_CHAMBER_PIN), -1)
- #define GET_PROBE_ADC() TERN(HAS_TEMP_ADC_PROBE, PIN_TO_ADC(TEMP_PROBE_PIN), -1)
- #define GET_COOLER_ADC() TERN(HAS_TEMP_ADC_COOLER, PIN_TO_ADC(TEMP_COOLER_PIN), -1)
- #define GET_BOARD_ADC() TERN(HAS_TEMP_ADC_BOARD, PIN_TO_ADC(TEMP_BOARD_PIN), -1)
- #define GET_FILAMENT_WIDTH_ADC() TERN(FILAMENT_WIDTH_SENSOR, PIN_TO_ADC(FILWIDTH_PIN), -1)
- #define GET_BUTTONS_ADC() TERN(HAS_ADC_BUTTONS, PIN_TO_ADC(ADC_KEYPAD_PIN), -1)
- #define GET_JOY_ADC_X() TERN(HAS_JOY_ADC_X, PIN_TO_ADC(JOY_X_PIN), -1)
- #define GET_JOY_ADC_Y() TERN(HAS_JOY_ADC_Y, PIN_TO_ADC(JOY_Y_PIN), -1)
- #define GET_JOY_ADC_Z() TERN(HAS_JOY_ADC_Z, PIN_TO_ADC(JOY_Z_PIN), -1)
-
- #define IS_ADC_REQUIRED(n) ( \
- GET_TEMP_0_ADC() == n || GET_TEMP_1_ADC() == n || GET_TEMP_2_ADC() == n || GET_TEMP_3_ADC() == n \
- || GET_TEMP_4_ADC() == n || GET_TEMP_5_ADC() == n || GET_TEMP_6_ADC() == n || GET_TEMP_7_ADC() == n \
- || GET_BED_ADC() == n \
- || GET_CHAMBER_ADC() == n \
- || GET_PROBE_ADC() == n \
- || GET_COOLER_ADC() == n \
- || GET_BOARD_ADC() == n \
- || GET_FILAMENT_WIDTH_ADC() == n \
- || GET_BUTTONS_ADC() == n \
- || GET_JOY_ADC_X() == n || GET_JOY_ADC_Y() == n || GET_JOY_ADC_Z() == n \
- )
-
- #if IS_ADC_REQUIRED(0)
- #define ADC0_IS_REQUIRED 1
- #define FIRST_ADC 0
- #else
- #define FIRST_ADC 1
- #endif
- #if IS_ADC_REQUIRED(1)
- #define ADC1_IS_REQUIRED 1
- #define LAST_ADC 1
- #else
- #define LAST_ADC 0
- #endif
- #if ADC0_IS_REQUIRED || ADC1_IS_REQUIRED
- #define ADC_IS_REQUIRED 1
- #define DMA_IS_REQUIRED 1
- #endif
-
- enum ADCIndex {
- #if GET_TEMP_0_ADC() == 0
- TEMP_0,
- #endif
- #if GET_TEMP_1_ADC() == 0
- TEMP_1,
- #endif
- #if GET_TEMP_2_ADC() == 0
- TEMP_2,
- #endif
- #if GET_TEMP_3_ADC() == 0
- TEMP_3,
- #endif
- #if GET_TEMP_4_ADC() == 0
- TEMP_4,
- #endif
- #if GET_TEMP_5_ADC() == 0
- TEMP_5,
- #endif
- #if GET_TEMP_6_ADC() == 0
- TEMP_6,
- #endif
- #if GET_TEMP_7_ADC() == 0
- TEMP_7,
- #endif
- #if GET_BED_ADC() == 0
- TEMP_BED,
- #endif
- #if GET_CHAMBER_ADC() == 0
- TEMP_CHAMBER,
- #endif
- #if GET_PROBE_ADC() == 0
- TEMP_PROBE,
- #endif
- #if GET_COOLER_ADC() == 0
- TEMP_COOLER,
- #endif
- #if GET_BOARD_ADC() == 0
- TEMP_BOARD,
- #endif
- #if GET_FILAMENT_WIDTH_ADC() == 0
- FILWIDTH,
- #endif
- #if GET_BUTTONS_ADC() == 0
- ADC_KEY,
- #endif
- #if GET_JOY_ADC_X() == 0
- JOY_X,
- #endif
- #if GET_JOY_ADC_Y() == 0
- JOY_Y,
- #endif
- #if GET_JOY_ADC_Z() == 0
- JOY_Z,
- #endif
- #if GET_TEMP_0_ADC() == 1
- TEMP_0,
- #endif
- #if GET_TEMP_1_ADC() == 1
- TEMP_1,
- #endif
- #if GET_TEMP_2_ADC() == 1
- TEMP_2,
- #endif
- #if GET_TEMP_3_ADC() == 1
- TEMP_3,
- #endif
- #if GET_TEMP_4_ADC() == 1
- TEMP_4,
- #endif
- #if GET_TEMP_5_ADC() == 1
- TEMP_5,
- #endif
- #if GET_TEMP_6_ADC() == 1
- TEMP_6,
- #endif
- #if GET_TEMP_7_ADC() == 1
- TEMP_7,
- #endif
- #if GET_BED_ADC() == 1
- TEMP_BED,
- #endif
- #if GET_CHAMBER_ADC() == 1
- TEMP_CHAMBER,
- #endif
- #if GET_PROBE_ADC() == 1
- TEMP_PROBE,
- #endif
- #if GET_COOLER_ADC() == 1
- TEMP_COOLER,
- #endif
- #if GET_BOARD_ADC() == 1
- TEMP_BOARD,
- #endif
- #if GET_FILAMENT_WIDTH_ADC() == 1
- FILWIDTH,
- #endif
- #if GET_BUTTONS_ADC() == 1
- ADC_KEY,
- #endif
- #if GET_JOY_ADC_X() == 1
- JOY_X,
- #endif
- #if GET_JOY_ADC_Y() == 1
- JOY_Y,
- #endif
- #if GET_JOY_ADC_Z() == 1
- JOY_Z,
- #endif
- ADC_COUNT
- };
-
- #if ENABLED(USE_WATCHDOG)
-
- #define WDT_TIMEOUT_REG TERN(WATCHDOG_DURATION_8S, WDT_CONFIG_PER_CYC8192, WDT_CONFIG_PER_CYC4096) // 4 or 8 second timeout
-
- void MarlinHAL::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.
-
- // Setup WDT clocks
- MCLK->APBAMASK.bit.OSC32KCTRL_ = true;
- MCLK->APBAMASK.bit.WDT_ = true;
- OSC32KCTRL->OSCULP32K.bit.EN1K = true; // Enable out 1K (this is what WDT uses)
-
- WDT->CTRLA.bit.ENABLE = false; // Disable watchdog for config
- SYNC(WDT->SYNCBUSY.bit.ENABLE);
-
- WDT->INTENCLR.reg = WDT_INTENCLR_EW; // Disable early warning interrupt
- WDT->CONFIG.reg = WDT_TIMEOUT_REG; // Set a 4s or 8s period for chip reset
-
- hal.watchdog_refresh();
-
- WDT->CTRLA.reg = WDT_CTRLA_ENABLE; // Start watchdog now in normal mode
- SYNC(WDT->SYNCBUSY.bit.ENABLE);
- }
-
- // Reset watchdog. MUST be called at least every 4 seconds after the
- // first watchdog_init or SAMD will go into emergency procedures.
- void MarlinHAL::watchdog_refresh() {
- SYNC(WDT->SYNCBUSY.bit.CLEAR); // Test first if previous is 'ongoing' to save time waiting for command execution
- WDT->CLEAR.reg = WDT_CLEAR_CLEAR_KEY;
- }
-
- #endif
-
- // ------------------------
- // Types
- // ------------------------
-
- #if DMA_IS_REQUIRED
-
- // Struct must be 32 bits aligned because of DMA accesses but fields needs to be 8 bits packed
- typedef struct __attribute__((aligned(4), packed)) {
- ADC_INPUTCTRL_Type INPUTCTRL;
- } HAL_DMA_DAC_Registers; // DMA transferred registers
-
- #endif
-
- // ------------------------
- // Private Variables
- // ------------------------
-
- #if ADC_IS_REQUIRED
-
- // Pins used by ADC inputs. Order must be ADC0 inputs first then ADC1
- static constexpr uint8_t adc_pins[ADC_COUNT] = {
- // ADC0 pins
- #if GET_TEMP_0_ADC() == 0
- TEMP_0_PIN,
- #endif
- #if GET_TEMP_1_ADC() == 0
- TEMP_1_PIN,
- #endif
- #if GET_TEMP_2_ADC() == 0
- TEMP_2_PIN,
- #endif
- #if GET_TEMP_3_ADC() == 0
- TEMP_3_PIN,
- #endif
- #if GET_TEMP_4_ADC() == 0
- TEMP_4_PIN,
- #endif
- #if GET_TEMP_5_ADC() == 0
- TEMP_5_PIN,
- #endif
- #if GET_TEMP_6_ADC() == 0
- TEMP_6_PIN,
- #endif
- #if GET_TEMP_7_ADC() == 0
- TEMP_7_PIN,
- #endif
- #if GET_BED_ADC() == 0
- TEMP_BED_PIN,
- #endif
- #if GET_CHAMBER_ADC() == 0
- TEMP_CHAMBER_PIN,
- #endif
- #if GET_PROBE_ADC() == 0
- TEMP_PROBE_PIN,
- #endif
- #if GET_COOLER_ADC() == 0
- TEMP_COOLER_PIN,
- #endif
- #if GET_BOARD_ADC() == 0
- TEMP_BOARD_PIN,
- #endif
- #if GET_FILAMENT_WIDTH_ADC() == 0
- FILWIDTH_PIN,
- #endif
- #if GET_BUTTONS_ADC() == 0
- ADC_KEYPAD_PIN,
- #endif
- #if GET_JOY_ADC_X() == 0
- JOY_X_PIN,
- #endif
- #if GET_JOY_ADC_Y() == 0
- JOY_Y_PIN,
- #endif
- #if GET_JOY_ADC_Z() == 0
- JOY_Z_PIN,
- #endif
- // ADC1 pins
- #if GET_TEMP_0_ADC() == 1
- TEMP_0_PIN,
- #endif
- #if GET_TEMP_1_ADC() == 1
- TEMP_1_PIN,
- #endif
- #if GET_TEMP_2_ADC() == 1
- TEMP_2_PIN,
- #endif
- #if GET_TEMP_3_ADC() == 1
- TEMP_3_PIN,
- #endif
- #if GET_TEMP_4_ADC() == 1
- TEMP_4_PIN,
- #endif
- #if GET_TEMP_5_ADC() == 1
- TEMP_5_PIN,
- #endif
- #if GET_TEMP_6_ADC() == 1
- TEMP_6_PIN,
- #endif
- #if GET_TEMP_7_ADC() == 1
- TEMP_7_PIN,
- #endif
- #if GET_BED_ADC() == 1
- TEMP_BED_PIN,
- #endif
- #if GET_CHAMBER_ADC() == 1
- TEMP_CHAMBER_PIN,
- #endif
- #if GET_PROBE_ADC() == 1
- TEMP_PROBE_PIN,
- #endif
- #if GET_COOLER_ADC() == 1
- TEMP_COOLER_PIN,
- #endif
- #if GET_BOARD_ADC() == 1
- TEMP_BOARD_PIN,
- #endif
- #if GET_FILAMENT_WIDTH_ADC() == 1
- FILWIDTH_PIN,
- #endif
- #if GET_BUTTONS_ADC() == 1
- ADC_KEYPAD_PIN,
- #endif
- #if GET_JOY_ADC_X() == 1
- JOY_X_PIN,
- #endif
- #if GET_JOY_ADC_Y() == 1
- JOY_Y_PIN,
- #endif
- #if GET_JOY_ADC_Z() == 1
- JOY_Z_PIN,
- #endif
- };
-
- static uint16_t adc_results[ADC_COUNT];
-
- #if ADC0_IS_REQUIRED
- Adafruit_ZeroDMA adc0DMAProgram, adc0DMARead;
-
- static constexpr HAL_DMA_DAC_Registers adc0_dma_regs_list[ADC_COUNT] = {
- #if GET_TEMP_0_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_0_PIN) },
- #endif
- #if GET_TEMP_1_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_1_PIN) },
- #endif
- #if GET_TEMP_2_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_2_PIN) },
- #endif
- #if GET_TEMP_3_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_3_PIN) },
- #endif
- #if GET_TEMP_4_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_4_PIN) },
- #endif
- #if GET_TEMP_5_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_5_PIN) },
- #endif
- #if GET_TEMP_6_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_6_PIN) },
- #endif
- #if GET_TEMP_7_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_7_PIN) },
- #endif
- #if GET_BED_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_BED_PIN) },
- #endif
- #if GET_CHAMBER_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_CHAMBER_PIN) },
- #endif
- #if GET_PROBE_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_PROBE_PIN) },
- #endif
- #if GET_COOLER_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_COOLER_PIN) },
- #endif
- #if GET_BOARD_ADC() == 0
- { PIN_TO_INPUTCTRL(TEMP_BOARD_PIN) },
- #endif
- #if GET_FILAMENT_WIDTH_ADC() == 0
- { PIN_TO_INPUTCTRL(FILWIDTH_PIN) },
- #endif
- #if GET_BUTTONS_ADC() == 0
- { PIN_TO_INPUTCTRL(ADC_KEYPAD_PIN) },
- #endif
- #if GET_JOY_ADC_X() == 0
- { PIN_TO_INPUTCTRL(JOY_X_PIN) },
- #endif
- #if GET_JOY_ADC_Y() == 0
- { PIN_TO_INPUTCTRL(JOY_Y_PIN) },
- #endif
- #if GET_JOY_ADC_Z() == 0
- { PIN_TO_INPUTCTRL(JOY_Z_PIN) },
- #endif
- };
-
- #define ADC0_AINCOUNT COUNT(adc0_dma_regs_list)
- #endif // ADC0_IS_REQUIRED
-
- #if ADC1_IS_REQUIRED
- Adafruit_ZeroDMA adc1DMAProgram, adc1DMARead;
-
- static constexpr HAL_DMA_DAC_Registers adc1_dma_regs_list[ADC_COUNT] = {
- #if GET_TEMP_0_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_0_PIN) },
- #endif
- #if GET_TEMP_1_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_1_PIN) },
- #endif
- #if GET_TEMP_2_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_2_PIN) },
- #endif
- #if GET_TEMP_3_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_3_PIN) },
- #endif
- #if GET_TEMP_4_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_4_PIN) },
- #endif
- #if GET_TEMP_5_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_5_PIN) },
- #endif
- #if GET_TEMP_6_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_6_PIN) },
- #endif
- #if GET_TEMP_7_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_7_PIN) },
- #endif
- #if GET_BED_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_BED_PIN) },
- #endif
- #if GET_CHAMBER_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_CHAMBER_PIN) },
- #endif
- #if GET_PROBE_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_PROBE_PIN) },
- #endif
- #if GET_COOLER_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_COOLER_PIN) },
- #endif
- #if GET_BOARD_ADC() == 1
- { PIN_TO_INPUTCTRL(TEMP_BOARD_PIN) },
- #endif
- #if GET_FILAMENT_WIDTH_ADC() == 1
- { PIN_TO_INPUTCTRL(FILWIDTH_PIN) },
- #endif
- #if GET_BUTTONS_ADC() == 1
- { PIN_TO_INPUTCTRL(ADC_KEYPAD_PIN) },
- #endif
- #if GET_JOY_ADC_X() == 1
- { PIN_TO_INPUTCTRL(JOY_X_PIN) },
- #endif
- #if GET_JOY_ADC_Y() == 1
- { PIN_TO_INPUTCTRL(JOY_Y_PIN) },
- #endif
- #if GET_JOY_ADC_Z() == 1
- { PIN_TO_INPUTCTRL(JOY_Z_PIN) },
- #endif
- };
-
- #define ADC1_AINCOUNT COUNT(adc1_dma_regs_list)
- #endif // ADC1_IS_REQUIRED
-
- #endif // ADC_IS_REQUIRED
-
- // ------------------------
- // Private functions
- // ------------------------
-
- void MarlinHAL::dma_init() {
-
- #if DMA_IS_REQUIRED
-
- DmacDescriptor *descriptor;
-
- #if ADC0_IS_REQUIRED
- adc0DMAProgram.setTrigger(ADC0_DMAC_ID_SEQ);
- adc0DMAProgram.setAction(DMA_TRIGGER_ACTON_BEAT);
- adc0DMAProgram.loop(true);
- if (adc0DMAProgram.allocate() == DMA_STATUS_OK) {
- descriptor = adc0DMAProgram.addDescriptor(
- (void *)adc0_dma_regs_list, // SRC
- (void *)&ADC0->DSEQDATA.reg, // DEST
- sizeof(adc0_dma_regs_list) / 4, // CNT
- DMA_BEAT_SIZE_WORD,
- true, // SRCINC
- false, // DSTINC
- DMA_ADDRESS_INCREMENT_STEP_SIZE_1, // STEPSIZE
- DMA_STEPSEL_SRC // STEPSEL
- );
- if (descriptor)
- descriptor->BTCTRL.bit.EVOSEL = DMA_EVENT_OUTPUT_BEAT;
- adc0DMAProgram.startJob();
- }
-
- adc0DMARead.setTrigger(ADC0_DMAC_ID_RESRDY);
- adc0DMARead.setAction(DMA_TRIGGER_ACTON_BEAT);
- adc0DMARead.loop(true);
- if (adc0DMARead.allocate() == DMA_STATUS_OK) {
- adc0DMARead.addDescriptor(
- (void *)&ADC0->RESULT.reg, // SRC
- &adc_results, // DEST
- ADC0_AINCOUNT, // CNT
- DMA_BEAT_SIZE_HWORD,
- false, // SRCINC
- true, // DSTINC
- DMA_ADDRESS_INCREMENT_STEP_SIZE_1, // STEPSIZE
- DMA_STEPSEL_DST // STEPSEL
- );
- adc0DMARead.startJob();
- }
- #endif
- #if ADC1_IS_REQUIRED
- adc1DMAProgram.setTrigger(ADC1_DMAC_ID_SEQ);
- adc1DMAProgram.setAction(DMA_TRIGGER_ACTON_BEAT);
- adc1DMAProgram.loop(true);
- if (adc1DMAProgram.allocate() == DMA_STATUS_OK) {
- descriptor = adc1DMAProgram.addDescriptor(
- (void *)adc1_dma_regs_list, // SRC
- (void *)&ADC1->DSEQDATA.reg, // DEST
- sizeof(adc1_dma_regs_list) / 4, // CNT
- DMA_BEAT_SIZE_WORD,
- true, // SRCINC
- false, // DSTINC
- DMA_ADDRESS_INCREMENT_STEP_SIZE_1, // STEPSIZE
- DMA_STEPSEL_SRC // STEPSEL
- );
- if (descriptor)
- descriptor->BTCTRL.bit.EVOSEL = DMA_EVENT_OUTPUT_BEAT;
- adc1DMAProgram.startJob();
- }
-
- adc1DMARead.setTrigger(ADC1_DMAC_ID_RESRDY);
- adc1DMARead.setAction(DMA_TRIGGER_ACTON_BEAT);
- adc1DMARead.loop(true);
- if (adc1DMARead.allocate() == DMA_STATUS_OK) {
- adc1DMARead.addDescriptor(
- (void *)&ADC1->RESULT.reg, // SRC
- &adc_results[ADC0_AINCOUNT], // DEST
- ADC1_AINCOUNT, // CNT
- DMA_BEAT_SIZE_HWORD,
- false, // SRCINC
- true, // DSTINC
- DMA_ADDRESS_INCREMENT_STEP_SIZE_1, // STEPSIZE
- DMA_STEPSEL_DST // STEPSEL
- );
- adc1DMARead.startJob();
- }
- #endif
-
- DMAC->PRICTRL0.bit.RRLVLEN0 = true; // Activate round robin for DMA channels required by ADCs
-
- #endif // DMA_IS_REQUIRED
- }
-
- // ------------------------
- // Public functions
- // ------------------------
-
- // HAL initialization task
- void MarlinHAL::init() {
- TERN_(DMA_IS_REQUIRED, dma_init());
- #if ENABLED(SDSUPPORT)
- #if HAS_SD_DETECT && SD_CONNECTION_IS(ONBOARD)
- SET_INPUT_PULLUP(SD_DETECT_PIN);
- #endif
- OUT_WRITE(SDSS, HIGH); // Try to set SDSS inactive before any other SPI users start up
- #endif
- }
-
- #pragma push_macro("WDT")
- #undef WDT // Required to be able to use '.bit.WDT'. Compiler wrongly replace struct field with WDT define
- uint8_t MarlinHAL::get_reset_source() {
- RSTC_RCAUSE_Type resetCause;
-
- resetCause.reg = REG_RSTC_RCAUSE;
- if (resetCause.bit.POR) return RST_POWER_ON;
- else if (resetCause.bit.EXT) return RST_EXTERNAL;
- else if (resetCause.bit.BODCORE || resetCause.bit.BODVDD) return RST_BROWN_OUT;
- else if (resetCause.bit.WDT) return RST_WATCHDOG;
- else if (resetCause.bit.SYST || resetCause.bit.NVM) return RST_SOFTWARE;
- else if (resetCause.bit.BACKUP) return RST_BACKUP;
- return 0;
- }
- #pragma pop_macro("WDT")
-
- void MarlinHAL::reboot() { NVIC_SystemReset(); }
-
- extern "C" {
- void * _sbrk(int incr);
-
- extern unsigned int __bss_end__; // end of bss section
- }
-
- // Return free memory between end of heap (or end bss) and whatever is current
- int freeMemory() {
- int free_memory, heap_end = (int)_sbrk(0);
- return (int)&free_memory - (heap_end ?: (int)&__bss_end__);
- }
-
- // ------------------------
- // ADC
- // ------------------------
-
- uint16_t MarlinHAL::adc_result;
-
- void MarlinHAL::adc_init() {
- #if ADC_IS_REQUIRED
- memset(adc_results, 0xFF, sizeof(adc_results)); // Fill result with invalid values
-
- LOOP_L_N(pi, COUNT(adc_pins))
- pinPeripheral(adc_pins[pi], PIO_ANALOG);
-
- LOOP_S_LE_N(ai, FIRST_ADC, LAST_ADC) {
- Adc* adc = ((Adc*[])ADC_INSTS)[ai];
-
- // ADC clock setup
- GCLK->PCHCTRL[ADC0_GCLK_ID + ai].bit.CHEN = false;
- SYNC(GCLK->PCHCTRL[ADC0_GCLK_ID + ai].bit.CHEN);
- GCLK->PCHCTRL[ADC0_GCLK_ID + ai].reg = GCLK_PCHCTRL_GEN_GCLK1 | GCLK_PCHCTRL_CHEN; // 48MHz startup code programmed
- SYNC(!GCLK->PCHCTRL[ADC0_GCLK_ID + ai].bit.CHEN);
- adc->CTRLA.bit.PRESCALER = ADC_CTRLA_PRESCALER_DIV32_Val; // 1.5MHZ adc clock
-
- // ADC setup
- // Preloaded data (fixed for all ADC instances hence not loaded by DMA)
- adc->REFCTRL.bit.REFSEL = ADC_REFCTRL_REFSEL_AREFA_Val; // VRefA pin
- SYNC(adc->SYNCBUSY.bit.REFCTRL);
- adc->CTRLB.bit.RESSEL = ADC_CTRLB_RESSEL_10BIT_Val; // ... ADC_CTRLB_RESSEL_16BIT_Val
- SYNC(adc->SYNCBUSY.bit.CTRLB);
- adc->SAMPCTRL.bit.SAMPLEN = (6 - 1); // Sampling clocks
- //adc->AVGCTRL.reg = ADC_AVGCTRL_SAMPLENUM_16 | ADC_AVGCTRL_ADJRES(4); // 16 Accumulated conversions and shift 4 to get oversampled 12 bits result
- //SYNC(adc->SYNCBUSY.bit.AVGCTRL);
-
- // Registers loaded by DMA
- adc->DSEQCTRL.bit.INPUTCTRL = true;
- adc->DSEQCTRL.bit.AUTOSTART = true; // Start conversion after DMA sequence
-
- adc->CTRLA.bit.ENABLE = true; // Enable ADC
- SYNC(adc->SYNCBUSY.bit.ENABLE);
- }
- #endif // ADC_IS_REQUIRED
- }
-
- void MarlinHAL::adc_start(const pin_t pin) {
- #if ADC_IS_REQUIRED
- LOOP_L_N(pi, COUNT(adc_pins))
- if (pin == adc_pins[pi]) { adc_result = adc_results[pi]; return; }
- #endif
-
- adc_result = 0xFFFF;
- }
-
- #endif // __SAMD51__
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