139 lines
4.2 KiB
C++
139 lines
4.2 KiB
C++
/**
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* Marlin 3D Printer Firmware
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* Copyright (c) 2019 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
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* Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* Description: HAL for Arduino Due and compatible (SAM3X8E)
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*
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* For ARDUINO_ARCH_SAM
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*/
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#ifdef ARDUINO_ARCH_SAM
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// --------------------------------------------------------------------------
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// Includes
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// --------------------------------------------------------------------------
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#include "../../inc/MarlinConfig.h"
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#include "HAL.h"
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#include <Wire.h>
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#include "usb/usb_task.h"
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// --------------------------------------------------------------------------
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// Externals
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// Local defines
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// Types
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// Variables
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// Public Variables
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// --------------------------------------------------------------------------
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uint16_t HAL_adc_result;
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// --------------------------------------------------------------------------
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// Private Variables
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// Function prototypes
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// Private functions
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// --------------------------------------------------------------------------
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// --------------------------------------------------------------------------
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// Public functions
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// --------------------------------------------------------------------------
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// HAL initialization task
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void HAL_init(void) {
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// Initialize the USB stack
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#if ENABLED(SDSUPPORT)
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OUT_WRITE(SDSS, HIGH); // Try to set SDSS inactive before any other SPI users start up
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#endif
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usb_task_init();
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}
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// HAL idle task
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void HAL_idletask(void) {
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// Perform USB stack housekeeping
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usb_task_idle();
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}
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// Disable interrupts
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void cli(void) { noInterrupts(); }
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// Enable interrupts
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void sei(void) { interrupts(); }
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void HAL_clear_reset_source(void) { }
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uint8_t HAL_get_reset_source(void) {
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switch ((RSTC->RSTC_SR >> 8) & 0x07) {
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case 0: return RST_POWER_ON;
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case 1: return RST_BACKUP;
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case 2: return RST_WATCHDOG;
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case 3: return RST_SOFTWARE;
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case 4: return RST_EXTERNAL;
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default: return 0;
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}
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}
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void _delay_ms(const int delay_ms) {
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// Todo: port for Due?
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delay(delay_ms);
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}
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extern "C" {
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extern unsigned int _ebss; // end of bss section
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}
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// Return free memory between end of heap (or end bss) and whatever is current
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int freeMemory() {
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int free_memory, heap_end = (int)_sbrk(0);
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return (int)&free_memory - (heap_end ? heap_end : (int)&_ebss);
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}
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// --------------------------------------------------------------------------
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// ADC
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// --------------------------------------------------------------------------
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void HAL_adc_start_conversion(const uint8_t adc_pin) {
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HAL_adc_result = analogRead(adc_pin);
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}
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uint16_t HAL_adc_get_result(void) {
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// nop
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return HAL_adc_result;
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}
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#endif // ARDUINO_ARCH_SAM
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