事件使用RT_EVENT_FLAG_CLEAR标志位无法清0

发布于 2021-01-27 19:51:39 浏览：1657 订阅该版

#include <rtthread.h>
#include <stm32f1xx.h>
#include "drv_common.h"
#include "gpio.h"
#include "diy.h"
#include "tim.h"

#define THREAD_PRIORITY  10
#define THREAD_TIMESLICE 5

#define KEY1_FLAG (1<<0)
#define KEY2_FLAG (1<<1)

static struct rt_event event;

static void thread1_entry(void *parameter);
static void thread2_entry(void *parameter);

ALIGN (RT_ALIGN_SIZE)
static char thread1_stack[512];
static struct rt_thread thread1;

static void thread1_entry(void *parameter)
{
    rt_uint32_t e;
    while(1)
    {

if(rt_event_recv(&event, KEY1_FLAG,  RT_EVENT_FLAG_AND | RT_EVENT_FLAG_CLEAR, RT_WAITING_FOREVER, &e) == RT_EOK)
        {
            LED11_ON;
            rt_thread_mdelay(1000);
        }
        else
        {
            LED11_OFF;
            rt_thread_mdelay(1000);
        }
    }
}

ALIGN (RT_ALIGN_SIZE)
static char thread2_stack[512];
static struct rt_thread thread2;

static void thread2_entry(void *parameter)
{
    rt_event_send(&event, KEY1_FLAG);
}

int ch1_module(void)
{
    rt_err_t result;
    result = rt_event_init(&event, "event", RT_IPC_FLAG_FIFO);
    if(result != RT_EOK)
    {
        return -1;
    }

rt_thread_init(&thread1,
                   "thread1",
                    thread1_entry,
                    RT_NULL,
                    &thread1_stack[0],
                    sizeof(thread1_stack),
                    THREAD_PRIORITY, THREAD_TIMESLICE);
    rt_thread_startup(&thread1);

rt_thread_init(&thread2,
                   "thread2",
                    thread2_entry,
                    RT_NULL,
                    &thread2_stack[0],
                    sizeof(thread2_stack),
                    THREAD_PRIORITY-1, THREAD_TIMESLICE);
    rt_thread_startup(&thread2);

return 0;
}

经测试LED11 常亮，不会亮然后灭掉，感觉像是事件标志位没有清零，不知道是哪里出了问题？求大神解疑。