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#include <stdint.h>
#include <stdlib.h>
#include <chopstx.h>
#include "sys.h" /* for set_led */
static chopstx_mutex_t mtx;
static chopstx_cond_t cnd0;
static chopstx_cond_t cnd1;
static uint8_t u, v;
static uint8_t m; /* 0..100 */
static void *
pwm (void *arg)
{
(void)arg;
chopstx_mutex_lock (&mtx);
chopstx_cond_wait (&cnd0, &mtx);
chopstx_mutex_unlock (&mtx);
while (1)
{
set_led (u&v);
chopstx_usleep (m);
set_led (0);
chopstx_usleep (100-m);
}
return NULL;
}
static void *
blk (void *arg)
{
(void)arg;
chopstx_mutex_lock (&mtx);
chopstx_cond_wait (&cnd1, &mtx);
chopstx_mutex_unlock (&mtx);
while (1)
{
v = 0;
chopstx_usleep (200*1000);
v = 1;
chopstx_usleep (200*1000);
}
return NULL;
}
#define PRIO_PWM 3
#define PRIO_BLK 2
extern uint8_t __process1_stack_base__, __process1_stack_size__;
extern uint8_t __process2_stack_base__, __process2_stack_size__;
const uint32_t __stackaddr_pwm = (uint32_t)&__process1_stack_base__;
const size_t __stacksize_pwm = (size_t)&__process1_stack_size__;
const uint32_t __stackaddr_blk = (uint32_t)&__process2_stack_base__;
const size_t __stacksize_blk = (size_t)&__process2_stack_size__;
int
main (int argc, const char *argv[])
{
chopstx_t thd;
chopstx_attr_t attr;
(void)argc;
(void)argv;
chopstx_mutex_init (&mtx);
chopstx_cond_init (&cnd0);
chopstx_cond_init (&cnd1);
m = 10;
chopstx_attr_init (&attr);
chopstx_attr_setschedparam (&attr, PRIO_PWM);
chopstx_attr_setstack (&attr, __stackaddr_pwm, __stacksize_pwm);
chopstx_create (&thd, &attr, pwm, NULL);
chopstx_attr_setschedparam (&attr, PRIO_BLK);
chopstx_attr_setstack (&attr, __stackaddr_blk, __stacksize_blk);
chopstx_create (&thd, &attr, blk, NULL);
chopstx_usleep (200*1000);
chopstx_mutex_lock (&mtx);
chopstx_cond_signal (&cnd0);
chopstx_cond_signal (&cnd1);
chopstx_mutex_unlock (&mtx);
while (1)
{
u ^= 1;
chopstx_usleep (200*1000*6);
}
return 0;
}
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