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/*
* Copyright 2020 Daniel Friesel
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "arch.h"
#include "driver/gpio.h"
#include "driver/stdout.h"
#include <avr/interrupt.h>
volatile uint16_t anemometer_count = 0;
void loop(void)
{
static uint8_t wind_count = 0;
static uint8_t dew_count = 0;
static uint16_t anemometer_copy;
wind_count++;
dew_count++;
if (wind_count == 10) {
cli();
anemometer_copy = anemometer_count;
anemometer_count = 0;
sei();
kout << "Anemometer Count = " << anemometer_copy << endl;
wind_count = 0;
}
if (dew_count == 59) {
gpio.output(GPIO::pc5, 0);
gpio.output(GPIO::pc4, 1);
}
else if (dew_count == 60) {
// Measure ADC6 with AVCC reference
ADMUX = _BV(REFS0) | 6;
// Enable ADC with /64 prescaler
ADCSRA = _BV(ADEN) | _BV(ADPS2);
// Start conversion
ADCSRA |= _BV(ADSC);
// wait until conversion is complete
while (ADCSRA & _BV(ADSC)) ;
uint8_t adcr_l = ADCL;
uint8_t adcr_h = ADCH;
uint16_t dew_raw = adcr_l + (adcr_h << 8);
dew_raw = 1024 - dew_raw;
// Disable ADC
ADCSRA &= ~_BV(ADEN);
kout << "Dew Raw = " << dew_raw << endl;
dew_count = 0;
gpio.input(GPIO::pc5, 0);
gpio.input(GPIO::pc4, 0);
}
}
int main(void)
{
arch.setup();
gpio.setup();
kout.setup();
gpio.output(GPIO::pd2, 0); // Anemometer Reed Contact
gpio.input(GPIO::pd3, 1); // Anemometer Reed Contact
gpio.input(GPIO::pc5, 0); // Dew Sensor GND
gpio.input(GPIO::pc4, 0); // Dew Sensor VCC
EICRA = _BV(ISC11);
EIMSK = _BV(INT1);
arch.idle_loop();
return 0;
}
ISR(INT1_vect) {
anemometer_count++;
}
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