From 186eb129213ef9cb6d8ef1cea70d9bc7559d380d Mon Sep 17 00:00:00 2001
From: "Jan \"Yenya\" Kasprzak" <kas@fi.muni.cz>
Date: Fri, 8 Jun 2012 20:36:20 +0200
Subject: [PATCH] Drive all three PWMs

---
 lights.c | 82 ++++++++++++++++++++++++++++++++++++++++++--------------
 1 file changed, 62 insertions(+), 20 deletions(-)

diff --git a/lights.c b/lights.c
index 653e8d4..aa018d9 100644
--- a/lights.c
+++ b/lights.c
@@ -5,51 +5,93 @@
 #include <avr/interrupt.h>
 
 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(CS11);
+	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;
+	OCR1D = OCR1B = OCR1A = 0x40;
 	TCNT1 = 0;
-	DDRB |= _BV( PB5 );
-	PORTB &= ~_BV( PB5 );
+	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) {
-		uint16_t pwm;
 		unsigned char pwmhi, pwmlo;
 
-		ADCSRA |= _BV(ADSC);
+		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);
+		}
 
-		_delay_ms(100);
+		sleep_mode();
 
-		pwm = ADCW;
+#if 0
 		if (!seen) {
 			seen = 1;
-			eeprom_write_word(&pwmee, pwm);
+			eeprom_write_byte(&debug, 2);
 		}
-		if (pwm > 0x3C0)
-			pwm = 0x3C0;
-		if (pwm < 1)
-			pwm = 1;
-		pwmhi = pwm >> 8;
-		pwmlo = pwm & 0xFF;
-
-		TC1H = pwmhi;
-		OCR1D = pwmlo;
+#endif
 	}
 
-	sleep_mode();
     DDRA |= _BV( PA0 );
     while( 1 ) { 
         PORTA |=  _BV( PA0 );
-- 
2.39.3