2019-02-12 22:06:53 +01:00
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/**
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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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*
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* Based on Sprinter and grbl.
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* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
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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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2018-08-28 04:49:49 +02:00
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/**
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* Description: HAL for Teensy32 (MK20DX256)
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*/
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#ifdef __MK20DX256__
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#include "HAL.h"
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2018-11-01 22:11:51 +01:00
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#include "../shared/Delay.h"
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2018-08-28 04:49:49 +02:00
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#include <Wire.h>
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uint16_t HAL_adc_result;
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static const uint8_t pin2sc1a[] = {
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5, 14, 8, 9, 13, 12, 6, 7, 15, 4, 0, 19, 3, 31, // 0-13, we treat them as A0-A13
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5, 14, 8, 9, 13, 12, 6, 7, 15, 4, // 14-23 (A0-A9)
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31, 31, 31, 31, 31, 31, 31, 31, 31, 31, // 24-33
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0+64, 19+64, 3+64, 31+64, // 34-37 (A10-A13)
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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.
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};
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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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*/
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void HAL_adc_init() {
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analog_init();
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while (ADC0_SC3 & ADC_SC3_CAL) {}; // Wait for calibration to finish
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NVIC_ENABLE_IRQ(IRQ_FTM1);
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}
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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 (RCM_SRS0) {
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case 128: return RST_POWER_ON; break;
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case 64: return RST_EXTERNAL; break;
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case 32: return RST_WATCHDOG; break;
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// case 8: return RST_LOSS_OF_LOCK; break;
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// case 4: return RST_LOSS_OF_CLOCK; break;
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// case 2: return RST_LOW_VOLTAGE; break;
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}
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return 0;
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}
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extern "C" {
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extern char __bss_end;
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extern char __heap_start;
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extern void* __brkval;
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int freeMemory() {
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int free_memory;
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if ((int)__brkval == 0)
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free_memory = ((int)&free_memory) - ((int)&__bss_end);
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else
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free_memory = ((int)&free_memory) - ((int)__brkval);
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return free_memory;
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}
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}
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void HAL_adc_start_conversion(const uint8_t adc_pin) { ADC0_SC1A = pin2sc1a[adc_pin]; }
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uint16_t HAL_adc_get_result(void) { return ADC0_RA; }
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#endif // __MK20DX256__
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