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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
// ------------------------
// 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();
}
// 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 port
DefaultSerial MSerial(false, Serial);
DefaultSerial1 MSerial1(false, Serial1);
DefaultSerial2 MSerial2(false, Serial2);
DefaultSerial3 MSerial3(false, Serial3);
#endif // ARDUINO_ARCH_SAM
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