X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?a=blobdiff_plain;f=lights.c;h=6d78e2335d41083f4d6f0704a0d0fe506a00f6df;hb=44655bfd75c9213673c827661a6471b3fb38032f;hp=49bf4ce6e23f3219f4371bb7119944325d2e8b30;hpb=1198700abdd06ef61ab82ed42b853dbfc21dd300;p=bike-lights.git

diff --git a/lights.c b/lights.c
index 49bf4ce..6d78e23 100644
--- a/lights.c
+++ b/lights.c
@@ -1,28 +1,150 @@
 #include <avr/io.h>
 #include <avr/eeprom.h>
 #include <util/delay.h>
+#include <avr/sleep.h>
+#include <avr/interrupt.h>
 
-uint16_t adcval EEMEM;
+uint16_t pwmee EEMEM;
+volatile uint16_t adcval;
 
-int main(void)
+volatile struct
+{
+  uint8_t pwm_int: 1;
+  uint8_t adc_int: 1;
+  uint8_t tmr_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.pwm_int = 1;
+}
+
+ISR(TIMER0_COMPA_vect)
+{
+	intflags.tmr_int = 1;
+}
+
+struct {
+	unsigned char intensity :2;
+	unsigned char length :6;
+} pattern[] = { {1, 2}, {0, 4}, { 1, 2 }, {0, 15}, {0, 0} };
+	
+static void inline init_pwm()
 {
 	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(CS11);
+	TC1H  = 0x03;
 	OCR1C = 0xFF;
-	OCR1D = 0x20;
-	TCNT1 = 3;
-	DDRB |= _BV( PB5 );
-	PORTB &= ~_BV( PB5 );
+	OCR1D = OCR1B = OCR1A = 0x40;
+	TCNT1 = 0;
+	DDRB |= _BV( PB5 ) | _BV( PB1 ) | _BV( PB3 );
+	PORTB &= ~(_BV( PB5 ) | _BV( PB1 ) | _BV( PB3 ));
+	TIMSK |= _BV(TOIE1);
+}
 
+static void inline init_adc()
+{
 	ADCSRA = _BV(ADEN) | _BV(ADATE) | _BV(ADPS1) | _BV(ADPS0);
 	ADMUX = _BV(REFS1) | _BV(MUX0);
-	ADCSRB = _BV(REFS2);
+	// ADCSRB = _BV(REFS2); 
 	DIDR0 = _BV(ADC1D) | _BV(AREFD);
+}
+
+static void inline init_tmr()
+{
+	TCCR0A = _BV(WGM00);
+	TCCR0B = _BV(CS02); // | _BV(CS00);
+	OCR0A = 0x80;
+	TIMSK |= _BV(OCIE0A);
+	DDRA |= _BV( PA0 );
+}
+
+int main(void)
+{
+	char seen = 0;
+	char pcount, ppos;
+
+	init_pwm();
+	init_adc();
+	init_tmr();
+
+	ppos = 0;
+	pcount = pattern[ppos].length;
+        if (pattern[ppos].intensity) {
+		PORTA |=  _BV( PA0 );
+	}
+
+	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.pwm_int) {
+			intflags.pwm_int = 0;
+			ADCSRA |= _BV(ADIE) | _BV(ADSC);
+		}
+
+		if (intflags.tmr_int) {
+			intflags.tmr_int = 0;
+			if (--pcount == 0) {
+				ppos++;
+				pcount = pattern[ppos].length;
+				if (!pcount) {
+					ppos = 0;
+					pcount = pattern[ppos].length;
+				}
+				if (pattern[ppos].intensity) {
+					PORTA |= _BV(PA0);
+				} else {
+					PORTA &= ~_BV(PA0);
+				}
+			}
+		}
+
+		sei();
+		sleep_mode();
+		cli();
 
-	ADCSRA |= _BV(ADSC);
-	_delay_ms(1000);
-	eeprom_write_word(&adcval, ADCW);
+#if 0
+		if (!seen) {
+			seen = 1;
+			eeprom_write_byte(&debug, 2);
+		}
+#endif
+	}
 
     DDRA |= _BV( PA0 );
     while( 1 ) {