115 lines
2.1 KiB
C
115 lines
2.1 KiB
C
#include <stdint.h>
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#include <stdlib.h>
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#include <chopstx.h>
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#include "sys.h" /* for set_led */
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static chopstx_mutex_t mtx;
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static chopstx_cond_t cnd0;
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static chopstx_cond_t cnd1;
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static uint8_t u, v;
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static uint8_t m; /* 0..100 */
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static void
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wait_for (uint32_t usec)
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{
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#if defined(BUSY_LOOP)
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uint32_t count = usec * 6;
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uint32_t i;
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for (i = 0; i < count; i++)
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asm volatile ("" : : "r" (i) : "memory");
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#else
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chopstx_usec_wait (usec);
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#endif
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}
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static void *
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pwm (void *arg)
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{
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(void)arg;
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chopstx_mutex_lock (&mtx);
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chopstx_cond_wait (&cnd0, &mtx);
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chopstx_mutex_unlock (&mtx);
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while (1)
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{
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set_led (u&v);
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wait_for (m);
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set_led (0);
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wait_for (100-m);
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}
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return NULL;
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}
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static void *
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blk (void *arg)
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{
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(void)arg;
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chopstx_mutex_lock (&mtx);
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chopstx_cond_wait (&cnd1, &mtx);
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chopstx_mutex_unlock (&mtx);
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while (1)
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{
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v = 0;
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wait_for (200*1000);
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v = 1;
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wait_for (200*1000);
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}
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return NULL;
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}
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#if defined(BUSY_LOOP)
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#define PRIO_PWM (CHOPSTX_SCHED_RR|1)
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#define PRIO_BLK (CHOPSTX_SCHED_RR|1)
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#else
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#define PRIO_PWM 3
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#define PRIO_BLK 2
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#endif
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extern uint8_t __process1_stack_base__, __process1_stack_size__;
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extern uint8_t __process2_stack_base__, __process2_stack_size__;
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const uint32_t __stackaddr_pwm = (uint32_t)&__process1_stack_base__;
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const size_t __stacksize_pwm = (size_t)&__process1_stack_size__;
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const uint32_t __stackaddr_blk = (uint32_t)&__process2_stack_base__;
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const size_t __stacksize_blk = (size_t)&__process2_stack_size__;
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int
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main (int argc, const char *argv[])
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{
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(void)argc;
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(void)argv;
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chopstx_mutex_init (&mtx);
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chopstx_cond_init (&cnd0);
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chopstx_cond_init (&cnd1);
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m = 10;
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chopstx_create (PRIO_PWM, __stackaddr_pwm, __stacksize_pwm, pwm, NULL);
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chopstx_create (PRIO_BLK, __stackaddr_blk, __stacksize_blk, blk, NULL);
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chopstx_usec_wait (200*1000);
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chopstx_mutex_lock (&mtx);
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chopstx_cond_signal (&cnd0);
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chopstx_cond_signal (&cnd1);
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chopstx_mutex_unlock (&mtx);
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while (1)
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{
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u ^= 1;
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wait_for (200*1000*6);
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}
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return 0;
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}
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