pattern flashing

diff --git a/lights.c b/lights.c
index aa018d977d61d8156b43e3f64e29a837d388b8b7..6d78e2335d41083f4d6f0704a0d0fe506a00f6df 100644 (file)
--- a/lights.c
+++ b/lights.c
@@ -9,9 +9,9 @@ volatile uint16_t adcval;
 
 volatile struct
 {
-  uint8_t tmr_int: 1;
+  uint8_t pwm_int: 1;
   uint8_t adc_int: 1;
-  uint8_t rx_int: 1;
+  uint8_t tmr_int: 1;
 }
 intflags;
 
@@ -28,30 +28,65 @@ ISR(ADC_vect)
 ISR(TIMER1_OVF_vect)
 {
        TIMSK &= ~_BV(TOIE1);
-       intflags.tmr_int = 1;
+       intflags.pwm_int = 1;
 }
 
-int main(void)
+ISR(TIMER0_COMPA_vect)
 {
-       char seen = 0;
+       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(COM1A0) | _BV(COM1A1) | _BV(COM1B0) | _BV(COM1B1) | _BV(PWM1A) | _BV(PWM1B);
-       TCCR1B = 0x80| _BV(CS13) | _BV(CS10);
+       TCCR1B = 0x80| _BV(CS13) | _BV(CS11);
        TC1H  = 0x03;
        OCR1C = 0xFF;
        OCR1D = OCR1B = OCR1A = 0x40;
        TCNT1 = 0;
        DDRB |= _BV( PB5 ) | _BV( PB1 ) | _BV( PB3 );
        PORTB &= ~(_BV( PB5 ) | _BV( PB1 ) | _BV( PB3 ));
-       TIMSK = _BV(TOIE1);
+       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); 
        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 );
+       }
 
-       sei();
        while (1) {
                unsigned char pwmhi, pwmlo;
 
@@ -77,12 +112,31 @@ int main(void)
                        TIMSK |= _BV(TOIE1);
                }
 
+               if (intflags.pwm_int) {
+                       intflags.pwm_int = 0;
+                       ADCSRA |= _BV(ADIE) | _BV(ADSC);
+               }
+
                if (intflags.tmr_int) {
                        intflags.tmr_int = 0;
-                       ADCSRA |= _BV(ADIE) | _BV(ADSC);
+                       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();
 
 #if 0
                if (!seen) {