157 lines
2.8 KiB
C
157 lines
2.8 KiB
C
#include <stdint.h>
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#include <stdlib.h>
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#include <chopstx.h>
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#include "board.h"
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#include "sys.h" /* for set_led */
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#include <contrib/usart.h>
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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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#define STACK_MAIN
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#define STACK_PROCESS_1
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#define STACK_PROCESS_2
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#define STACK_PROCESS_3
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#include "stack-def.h"
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#define STACK_ADDR_PWM ((uint32_t)process1_base)
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#define STACK_SIZE_PWM (sizeof process1_base)
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#define STACK_ADDR_BLK ((uint32_t)process2_base)
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#define STACK_SIZE_BLK (sizeof process2_base)
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#define PRIO_USART 4
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#define STACK_ADDR_USART ((uint32_t)process3_base)
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#define STACK_SIZE_USART (sizeof process3_base)
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static int
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ss_notify (uint8_t dev_no, uint16_t state_bits)
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{
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(void)dev_no;
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(void)state_bits;
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return 0;
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}
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int
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main (int argc, const char *argv[])
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{
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chopstx_poll_cond_t poll_desc;
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uint32_t timeout;
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struct chx_poll_head *ph[1];
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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, STACK_ADDR_PWM, STACK_SIZE_PWM, pwm, NULL);
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chopstx_create (PRIO_BLK, STACK_ADDR_BLK, STACK_SIZE_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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usart_init (PRIO_USART, STACK_ADDR_USART, STACK_SIZE_USART, ss_notify);
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usart_config (2, B115200 | CS8 | STOP1B);
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usart_read_prepare_poll (2, &poll_desc);
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ph[0] = (struct chx_poll_head *)&poll_desc;
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timeout = 200*1000*6;
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while (1)
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{
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chopstx_poll (&timeout, 1, ph);
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if (timeout == 0)
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{
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usart_write (2, "Hello\r\n", 7);
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u ^= 1;
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timeout = 200*1000*6;
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}
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else
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{
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char buf[256];
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int r;
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r = usart_read (2, buf, 256);
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if (r)
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usart_write (2, buf, r);
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}
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}
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return 0;
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}
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