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- /**
- * Marlin 3D Printer Firmware
- * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
- * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
- *
- * 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/>.
- *
- */
-
- /**
- * HAL for Arduino Due and compatible (SAM3X8E)
- */
-
- #ifdef ARDUINO_ARCH_SAM
-
- #include "../../inc/MarlinConfig.h"
- #include "HAL.h"
-
- #include <Wire.h>
- #include "usb/usb_task.h"
-
- // ------------------------
- // Public Variables
- // ------------------------
-
- uint16_t HAL_adc_result;
-
- // ------------------------
- // Public functions
- // ------------------------
-
- TERN_(POSTMORTEM_DEBUGGING, extern void install_min_serial());
-
- // HAL initialization task
- 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
- #endif
- usb_task_init();
- TERN_(POSTMORTEM_DEBUGGING, install_min_serial()); // Install the min serial handler
- }
-
- // HAL idle task
- void HAL_idletask() {
- // Perform USB stack housekeeping
- usb_task_idle();
- }
-
- // Disable interrupts
- void cli() { noInterrupts(); }
-
- // Enable interrupts
- void sei() { interrupts(); }
-
- void HAL_clear_reset_source() { }
-
- uint8_t HAL_get_reset_source() {
- switch ((RSTC->RSTC_SR >> 8) & 0x07) {
- case 0: return RST_POWER_ON;
- case 1: return RST_BACKUP;
- case 2: return RST_WATCHDOG;
- case 3: return RST_SOFTWARE;
- case 4: return RST_EXTERNAL;
- default: return 0;
- }
- }
-
- void _delay_ms(const int delay_ms) {
- // Todo: port for Due?
- delay(delay_ms);
- }
-
- extern "C" {
- extern unsigned int _ebss; // 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)&_ebss);
- }
-
- // ------------------------
- // ADC
- // ------------------------
-
- void HAL_adc_start_conversion(const uint8_t ch) {
- HAL_adc_result = analogRead(ch);
- }
-
- uint16_t HAL_adc_get_result() {
- // nop
- return HAL_adc_result;
- }
-
- // Forward the default serial ports
- #if ANY_SERIAL_IS(0)
- DefaultSerial1 MSerial0(false, Serial);
- #endif
- #if ANY_SERIAL_IS(1)
- DefaultSerial2 MSerial1(false, Serial1);
- #endif
- #if ANY_SERIAL_IS(2)
- DefaultSerial3 MSerial2(false, Serial2);
- #endif
- #if ANY_SERIAL_IS(3)
- DefaultSerial4 MSerial3(false, Serial3);
- #endif
-
- #endif // ARDUINO_ARCH_SAM
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