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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/>.
*
*/
/**
* HAL for Teensy 3.2 (MK20DX256)
*/
#ifdef __MK20DX256__
#include "HAL.h"
#include "../shared/Delay.h"
#include <Wire.h>
DefaultSerial MSerial(false);
USBSerialType USBSerial(false, SerialUSB);
uint16_t HAL_adc_result;
static const uint8_t pin2sc1a[] = {
5, 14, 8, 9, 13, 12, 6, 7, 15, 4, 0, 19, 3, 31, // 0-13, we treat them as A0-A13
5, 14, 8, 9, 13, 12, 6, 7, 15, 4, // 14-23 (A0-A9)
31, 31, 31, 31, 31, 31, 31, 31, 31, 31, // 24-33
0+64, 19+64, 3+64, 31+64, // 34-37 (A10-A13)
26, 22, 23, 27, 29, 30 // 38-43: temp. sensor, VREF_OUT, A14, bandgap, VREFH, VREFL. A14 isn't connected to anything in Teensy 3.0.
};
/*
// disable interrupts
void cli() { noInterrupts(); }
// enable interrupts
void sei() { interrupts(); }
*/
void HAL_adc_init() {
analog_init();
while (ADC0_SC3 & ADC_SC3_CAL) {}; // Wait for calibration to finish
NVIC_ENABLE_IRQ(IRQ_FTM1);
}
void HAL_clear_reset_source() { }
uint8_t HAL_get_reset_source() {
switch (RCM_SRS0) {
case 128: return RST_POWER_ON; break;
case 64: return RST_EXTERNAL; break;
case 32: return RST_WATCHDOG; break;
// case 8: return RST_LOSS_OF_LOCK; break;
// case 4: return RST_LOSS_OF_CLOCK; break;
// case 2: return RST_LOW_VOLTAGE; break;
}
return 0;
}
extern "C" {
extern char __bss_end;
extern char __heap_start;
extern void* __brkval;
int freeMemory() {
int free_memory;
if ((int)__brkval == 0)
free_memory = ((int)&free_memory) - ((int)&__bss_end);
else
free_memory = ((int)&free_memory) - ((int)__brkval);
return free_memory;
}
}
void HAL_adc_start_conversion(const uint8_t adc_pin) { ADC0_SC1A = pin2sc1a[adc_pin]; }
uint16_t HAL_adc_get_result() { return ADC0_RA; }
#endif // __MK20DX256__
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