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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- *
- * Based on Sprinter and grbl.
- * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
- *
- * 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 TARGET_LPC1768
-
- #include "../../inc/MarlinConfig.h"
- #include "../shared/Delay.h"
- #include "../../../gcode/parser.h"
-
- DefaultSerial1 USBSerial(false, UsbSerial);
-
- uint32_t MarlinHAL::adc_result = 0;
-
- // U8glib required functions
- extern "C" {
- void u8g_xMicroDelay(uint16_t val) { DELAY_US(val); }
- void u8g_MicroDelay() { u8g_xMicroDelay(1); }
- void u8g_10MicroDelay() { u8g_xMicroDelay(10); }
- void u8g_Delay(uint16_t val) { delay(val); }
- }
-
- // return free heap space
- int freeMemory() {
- char stack_end;
- void *heap_start = malloc(sizeof(uint32_t));
- if (heap_start == 0) return 0;
-
- uint32_t result = (uint32_t)&stack_end - (uint32_t)heap_start;
- free(heap_start);
- return result;
- }
-
- void MarlinHAL::reboot() { NVIC_SystemReset(); }
-
- uint8_t MarlinHAL::get_reset_source() {
- #if ENABLED(USE_WATCHDOG)
- if (watchdog_timed_out()) return RST_WATCHDOG;
- #endif
- return RST_POWER_ON;
- }
-
- void MarlinHAL::clear_reset_source() { watchdog_clear_timeout_flag(); }
-
- void flashFirmware(const int16_t) {
- delay(500); // Give OS time to disconnect
- USB_Connect(false); // USB clear connection
- delay(1000); // Give OS time to notice
- hal.reboot();
- }
-
- #if ENABLED(USE_WATCHDOG)
-
- #include <lpc17xx_wdt.h>
-
- #define WDT_TIMEOUT_US TERN(WATCHDOG_DURATION_8S, 8000000, 4000000) // 4 or 8 second timeout
-
- void MarlinHAL::watchdog_init() {
- #if ENABLED(WATCHDOG_RESET_MANUAL)
- // We enable the watchdog timer, but only for the interrupt.
-
- // Configure WDT to only trigger an interrupt
- // Disable WDT interrupt (just in case, to avoid triggering it!)
- NVIC_DisableIRQ(WDT_IRQn);
-
- // We NEED memory barriers to ensure Interrupts are actually disabled!
- // ( https://dzone.com/articles/nvic-disabling-interrupts-on-arm-cortex-m-and-the )
- __DSB();
- __ISB();
-
- // Configure WDT to only trigger an interrupt
- // Initialize WDT with the given parameters
- WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_INT_ONLY);
-
- // Configure and enable WDT interrupt.
- NVIC_ClearPendingIRQ(WDT_IRQn);
- NVIC_SetPriority(WDT_IRQn, 0); // Use highest priority, so we detect all kinds of lockups
- NVIC_EnableIRQ(WDT_IRQn);
- #else
- WDT_Init(WDT_CLKSRC_IRC, WDT_MODE_RESET);
- #endif
- WDT_Start(WDT_TIMEOUT_US);
- }
-
- void MarlinHAL::watchdog_refresh() {
- WDT_Feed();
- #if DISABLED(PINS_DEBUGGING) && PIN_EXISTS(LED)
- TOGGLE(LED_PIN); // heartbeat indicator
- #endif
- }
-
- // Timeout state
- bool MarlinHAL::watchdog_timed_out() { return TEST(WDT_ReadTimeOutFlag(), 0); }
- void MarlinHAL::watchdog_clear_timeout_flag() { WDT_ClrTimeOutFlag(); }
-
- #endif // USE_WATCHDOG
-
- // For M42/M43, scan command line for pin code
- // return index into pin map array if found and the pin is valid.
- // return dval if not found or not a valid pin.
- int16_t PARSED_PIN_INDEX(const char code, const int16_t dval) {
- const uint16_t val = (uint16_t)parser.intval(code, -1), port = val / 100, pin = val % 100;
- const int16_t ind = (port < ((NUM_DIGITAL_PINS) >> 5) && pin < 32) ? ((port << 5) | pin) : -2;
- return ind > -1 ? ind : dval;
- }
-
- #endif // TARGET_LPC1768
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