X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=heater.git;a=blobdiff_plain;f=firmware%2Fmain.c;fp=firmware%2Fmain.c;h=30f904b5e463cd2c335557e9e17cb9b6867afac1;hp=0000000000000000000000000000000000000000;hb=2755b4c6000c4de64d83921bdb109077f4b38597;hpb=138fbcfab1abb032b8b532e845bfb92372a8d827

diff --git a/firmware/main.c b/firmware/main.c
new file mode 100644
index 0000000..30f904b
--- /dev/null
+++ b/firmware/main.c
@@ -0,0 +1,33 @@
+#include <avr/io.h>
+#include <avr/eeprom.h>
+#include <util/delay.h>
+
+static uint16_t adcval EEMEM;
+
+int main()
+{
+	DDRB |= _BV(PB2) | _BV(PB4);
+	TCCR1 = _BV(CS10); // clk/1 = 1 MHz
+	// TCCR1 = _BV(CS11) | _BV(CS13); // clk/512 = 2 kHz
+	GTCCR = _BV(COM1B1) | _BV(PWM1B);
+	OCR1C = 255;
+	OCR1B = 9;
+
+	ADCSRA = _BV(ADEN) | _BV(ADPS1) | _BV(ADPS0); // clk/8 = 125 kHz
+	ADMUX = _BV(REFS1) | _BV(MUX1) | _BV(MUX0); // 1.1V ref., PB3 single-ended
+	DIDR0 = _BV(ADC3D);
+	ADCSRA |= _BV(ADSC);
+	while (!(ADCSRA & _BV(ADIF)))
+		;
+	ADCSRA |= _BV(ADSC);
+	while (!(ADCSRA & _BV(ADIF)))
+		;
+	eeprom_write_word(&adcval, ADCW);
+
+	while(1) {
+		PORTB |= _BV(PB2);
+		_delay_ms(500);
+		PORTB &= ~_BV(PB2);
+		_delay_ms(1000);
+	}
+}