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Eve Entropia 2010-04-03 22:39:13 +02:00
parent e64fd212f0
commit 9a9003c496
1 changed files with 10 additions and 30 deletions
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40
projekte/protothreads/example.c
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@ -5,8 +5,12 @@
#include "timer/clock.h" #include "timer/clock.h"
#include "timer/timer.h" #include "timer/timer.h"
/* Two flags that the two protothread functions use. */ /* TIME_DELAY macro for convenience */
static int protothread1_flag, protothread2_flag; #define TIMER_DELAY(pt, timer, t) \
do { \
timer_set(&timer, t); \
PT_WAIT_UNTIL(pt, timer_expired(&timer)); \
} while(0);
/* Two timers for the two protothreads. */ /* Two timers for the two protothreads. */
static struct timer timer1, timer2; static struct timer timer1, timer2;
@ -20,20 +24,10 @@ protothread1(struct pt *pt)
/* We loop forever here. */ /* We loop forever here. */
while(1) { while(1) {
/* Wait until the other protothread has set its flag. */
PT_WAIT_UNTIL(pt, protothread2_flag != 0);
PORTB |= _BV(PB3); PORTB |= _BV(PB3);
timer_set(&timer1, CLOCK_SECOND/2); TIMER_DELAY(pt, timer1, 20);
PT_WAIT_UNTIL(pt, timer_expired(&timer1));
PORTB &= ~_BV(PB3); PORTB &= ~_BV(PB3);
timer_set(&timer1, CLOCK_SECOND/2); TIMER_DELAY(pt, timer1, 20);
PT_WAIT_UNTIL(pt, timer_expired(&timer1));
/* We then reset the other protothread's flag, and set our own
flag so that the other protothread can run. */
protothread2_flag = 0;
protothread1_flag = 1;
/* And we loop. */ /* And we loop. */
} }
@ -52,24 +46,10 @@ protothread2(struct pt *pt)
/* We loop forever here. */ /* We loop forever here. */
while(1) { while(1) {
/* Let the other protothread run. */
protothread2_flag = 1;
/* Wait until the other protothread has set its flag. */
PT_WAIT_UNTIL(pt, protothread1_flag != 0);
PORTB |= _BV(PB2); PORTB |= _BV(PB2);
timer_set(&timer2, CLOCK_SECOND/2); TIMER_DELAY(pt, timer2, 60);
PT_WAIT_UNTIL(pt, timer_expired(&timer2));
PORTB &= ~_BV(PB2); PORTB &= ~_BV(PB2);
timer_set(&timer2, CLOCK_SECOND/2); TIMER_DELAY(pt, timer2, 60);
PT_WAIT_UNTIL(pt, timer_expired(&timer2));
/* We then reset the other protothread's flag, and set our own
flag so that the other protothread can run. */
protothread1_flag = 0;
protothread2_flag = 1;
/* And we loop. */ /* And we loop. */
} }