Commit da828589 authored by Birte Kristina Friesel's avatar Birte Kristina Friesel
Browse files

wetterstation: Add dew sensor

parent ce0cd4bd

src/app/wetterstation/main.cc

+45 −5
Original line number Diff line number Diff line
@@ -8,9 +8,14 @@ volatile uint16_t anemometer_count = 0; 


void loop(void)

{

	static uint8_t loop_count = 0;

	static uint8_t wind_count = 0;

	static uint8_t dew_count = 0;

	static uint16_t anemometer_copy;

	if (++loop_count == 10) {



	wind_count++;

	dew_count++;



	if (wind_count == 10) {



		cli();

		anemometer_copy = anemometer_count;
@@ -18,7 +23,39 @@ void loop(void) 
		sei();



		kout << "Anemometer Count = " << anemometer_copy << endl;

		loop_count = 0;

		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);

	}

}
@@ -28,8 +65,11 @@ int main(void) 
	gpio.setup();

	kout.setup();



	gpio.output(GPIO::pd2, 0);

	gpio.input(GPIO::pd3, 1);

	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);