X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=lights.c;h=aa018d977d61d8156b43e3f64e29a837d388b8b7;hb=330fb23b8a14ad41bef2997f8093ea9894467e19;hp=0bedc53e2e059f070a82bdcee6e00381adeca255;hpb=e1211bd691c284824463728051ab22d0cf461b06;p=bike-lights.git

diff --git a/lights.c b/lights.c
index 0bedc53..aa018d9 100644
--- a/lights.c
+++ b/lights.c
@@ -1,26 +1,97 @@
 #include <avr/io.h>
 #include <avr/eeprom.h>
 #include <util/delay.h>
+#include <avr/sleep.h>
+#include <avr/interrupt.h>
 
-char dbg[5] __attribute__((section(".eeprom")));
+uint16_t pwmee EEMEM;
+volatile uint16_t adcval;
+
+volatile struct
+{
+  uint8_t tmr_int: 1;
+  uint8_t adc_int: 1;
+  uint8_t rx_int: 1;
+}
+intflags;
+
+
+unsigned char debug EEMEM = 1;
+
+ISR(ADC_vect)
+{
+	adcval = ADCW;
+	ADCSRA &= ~_BV(ADIE);         /* disable ADC interrupt */
+	intflags.adc_int = 1;
+}
+
+ISR(TIMER1_OVF_vect)
+{
+	TIMSK &= ~_BV(TOIE1);
+	intflags.tmr_int = 1;
+}
 
 int main(void)
 {
+	char seen = 0;
+
 	TCCR1C = _BV(COM1D0) | _BV(COM1D1) | _BV(PWM1D);
-	TCCR1A = _BV(PWM1A) | _BV(PWM1B);
-	TCCR1B = 0x80 | _BV(CS13) | _BV(CS12);
+	TCCR1A = _BV(COM1A0) | _BV(COM1A1) | _BV(COM1B0) | _BV(COM1B1) | _BV(PWM1A) | _BV(PWM1B);
+	TCCR1B = 0x80| _BV(CS13) | _BV(CS10);
+	TC1H  = 0x03;
 	OCR1C = 0xFF;
-	OCR1D = 0x20;
-	TCNT1 = 3;
-	DDRB |= _BV( PB5 );
-	PORTB &= ~_BV( PB5 );
-
-	_delay_ms(1000);
-	eeprom_write_byte(&dbg[0], TCNT1);
-	eeprom_write_byte(&dbg[1], OCR1C);
-	eeprom_write_byte(&dbg[2], OCR1D);
-	eeprom_write_byte(&dbg[3], TIFR);
-	eeprom_write_byte(&dbg[4], TCCR1B);
+	OCR1D = OCR1B = OCR1A = 0x40;
+	TCNT1 = 0;
+	DDRB |= _BV( PB5 ) | _BV( PB1 ) | _BV( PB3 );
+	PORTB &= ~(_BV( PB5 ) | _BV( PB1 ) | _BV( PB3 ));
+	TIMSK = _BV(TOIE1);
+
+	ADCSRA = _BV(ADEN) | _BV(ADATE) | _BV(ADPS1) | _BV(ADPS0);
+	ADMUX = _BV(REFS1) | _BV(MUX0);
+	// ADCSRB = _BV(REFS2); 
+	DIDR0 = _BV(ADC1D) | _BV(AREFD);
+
+	sei();
+	while (1) {
+		unsigned char pwmhi, pwmlo;
+
+		if (intflags.adc_int) {
+			intflags.adc_int = 0;
+
+			if (adcval > 0x3C0)
+				adcval = 0x3C0;
+			if (adcval < 1)
+				adcval = 1;
+			pwmhi = adcval >> 8;
+			pwmlo = adcval & 0xFF;
+
+			TC1H = pwmhi;
+			OCR1D = pwmlo;
+
+			TC1H = pwmhi;
+			OCR1B = pwmlo;
+
+			TC1H = pwmhi;
+			OCR1A = pwmlo;
+
+			TIMSK |= _BV(TOIE1);
+		}
+
+		if (intflags.tmr_int) {
+			intflags.tmr_int = 0;
+			ADCSRA |= _BV(ADIE) | _BV(ADSC);
+		}
+
+		sleep_mode();
+
+#if 0
+		if (!seen) {
+			seen = 1;
+			eeprom_write_byte(&debug, 2);
+		}
+#endif
+	}
+
     DDRA |= _BV( PA0 );
     while( 1 ) { 
         PORTA |=  _BV( PA0 );