hbc: timer with compare match output

[lra-as-sensor] / hbc.c

diff --git a/hbc.c b/hbc.c
index c5749cc..5ff04c7 100644 (file)
--- a/hbc.c
+++ b/hbc.c
@@ -7,16 +7,28 @@
 #include <avr/interrupt.h>
 #include <util/delay.h>
 #include "haptic.h"
+       
+volatile int xvar = 1;
 
 /* idle mode will wake up board and will
  * return PC after latest sleep_mode() call */
 EMPTY_INTERRUPT(SIG_COMPARATOR);
 
-/* for debugging purposes */
-ISR(BADISR_vect) 
+ISR(TIM0_COMPA_vect)
+{      
+       xvar++;
+}
+ISR(TIM0_COMPB_vect)
+{
+       xvar++;
+}
+
+ISR(TIM0_OVF_vect)
 {
+       //xvar++;
 }
 
+
 static void switch_idle(void)
 {
        sei();
@@ -35,21 +47,30 @@ static void init_board(void)
 
 int main(void)
 {
-       
-       init_board();   
+       init_board();
+       xvar = 1;       
+       cli();
+       DDRB |= (1 << DDB0); /* set PB0 as output */
+       TCCR0A = TCCR0B = 0;
+       TCCR0A |= (1 << WGM01) | (1 << WGM00) | (1 << COM0A1);
+       TCCR0B |= (1 << CS02) | (1 << CS00); /* clk/1024 prescaler */
+       OCR0A = 0x7F; /* 50% duty cycle */
+       TCNT0 = 0;
+       TIMSK = (1 << OCIE0A) | (1 << OCIE0B) | (1 << TOIE0); /* enable interrupts for overflow and compare */
+       sei();
 
        while(1) {
-
+               _delay_ms(100);
                /* set LRA as sensor and switch to idle mode
                 * check back-EMF of LRA: if treshold is surpassed
                 * comparator intterupt is triggered */
-               set_lra_as_sensor();
-               switch_idle(); 
-
-               /* board wakes up, set LRA as actuator and
-                * plays haptic effect */
-               set_lra_as_actuator();
-               play_haptic();
+//             set_lra_as_sensor();
+//             switch_idle(); 
+//
+//             /* board wakes up, set LRA as actuator and
+//              * plays haptic effect */
+//             set_lra_as_actuator();
+//             play_haptic();
 
        }