utils.cpp

/*
    utils.cpp
    Copyright (C) 2017 Niryo

    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 <http://www.gnu.org/licenses/>.
*/

#include "utils.h"

#include <Arduino.h>

// analogRead takes < 30 micros instead of > 400 micros (10 bits precision)
void init_analog_fast_read()
{
  ADC->CTRLA.bit.ENABLE = 0;                     // Disable ADC
  while( ADC->STATUS.bit.SYNCBUSY == 1 );        // Wait for synchronization
  ADC->CTRLB.reg = ADC_CTRLB_PRESCALER_DIV128 |  // Divide Clock by 128
                   ADC_CTRLB_RESSEL_10BIT; 
  ADC->AVGCTRL.reg = ADC_AVGCTRL_SAMPLENUM_1 |   // 1 sample 
                     ADC_AVGCTRL_ADJRES(0x00ul); // Adjusting result by 0
  ADC->SAMPCTRL.reg = 0x00;                      // Sampling Time Length = 0

  ADC->CTRLA.bit.ENABLE = 1;                     // Enable ADC
  while( ADC->STATUS.bit.SYNCBUSY == 1 );        // Wait for synchronization
}

void setup_fan()
{
  pinMode(FAN_PIN, OUTPUT);
  delay(10);
}