rt-thread-official/examples/kernel/timer_timeout.c

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/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
*
*/
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/*
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*
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*
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* 3线线线
* 线
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*/
#include <rtthread.h>
#include "tc_comm.h"
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/* 指向线程控制块的指针 */
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static rt_thread_t tid = RT_NULL;
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/* 消息队列控制块 */
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static struct rt_messagequeue mq;
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/* 消息队列中用到的放置消息的内存池 */
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static char msg_pool[2048];
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/* 定时器的控制块 */
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static struct rt_timer timer;
static rt_uint16_t no = 0;
static void timer_timeout(void* parameter)
{
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char buf[32];
rt_uint32_t length;
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length = rt_snprintf(buf, sizeof(buf), "message %d", no++);
rt_mq_send(&mq, &buf[0], length);
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}
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/* 线程入口函数 */
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static void thread_entry(void* parameter)
{
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char buf[64];
rt_err_t result;
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/* 初始化定时器 */
rt_timer_init(&timer, "timer", /* 定时器名字是 timer1 */
timer_timeout, /* 超时时回调的处理函数 */
RT_NULL, /* 超时函数的入口参数 */
1, /* 定时长度以OS Tick为单位即1个OS Tick */
RT_TIMER_FLAG_PERIODIC); /* 周期性定时器 */
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while (1)
{
rt_memset(&buf[0], 0, sizeof(buf));
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/* 从消息队列中接收消息 */
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result = rt_mq_recv(&mq, &buf[0], sizeof(buf), 1);
if (result == RT_EOK)
{
rt_kprintf("recv msg: %s\n", buf);
}
else if (result == -RT_ETIMEOUT)
{
rt_kprintf("recv msg timeout\n");
}
}
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}
int timer_timeout_init()
{
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/* 初始化消息队列 */
rt_mq_init(&mq, "mqt",
&msg_pool[0], /* 内存池指向msg_pool */
128 - sizeof(void*), /* 每个消息的大小是 128 - void* */
sizeof(msg_pool), /* 内存池的大小是msg_pool的大小 */
RT_IPC_FLAG_PRIO); /* 如果有多个线程等待,按照优先级由高到低的方法分配消息 */
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/* 创建线程 */
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tid = rt_thread_create("t",
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thread_entry, RT_NULL, /* 线程入口是thread_entry, 入口参数是RT_NULL */
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THREAD_STACK_SIZE, THREAD_PRIORITY, THREAD_TIMESLICE);
if (tid != RT_NULL)
rt_thread_startup(tid);
else
tc_stat(TC_STAT_END | TC_STAT_FAILED);
return 0;
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}
#ifdef RT_USING_TC
static void _tc_cleanup()
{
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/* 调度器上锁,上锁后,将不再切换到其他线程,仅响应中断 */
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rt_enter_critical();
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/* 删除线程 */
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if (tid != RT_NULL && tid->stat != RT_THREAD_CLOSE)
rt_thread_delete(tid);
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/* 执行消息队列对象脱离 */
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rt_mq_detach(&mq);
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/* 执行定时器脱离 */
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rt_timer_detach(&timer);
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/* 调度器解锁 */
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rt_exit_critical();
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/* 设置TestCase状态 */
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tc_done(TC_STAT_PASSED);
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}
int _tc_timer_timeout()
{
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/* 设置TestCase清理回调函数 */
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tc_cleanup(_tc_cleanup);
timer_timeout_init();
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/* 返回TestCase运行的最长时间 */
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return 100;
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}
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/* 输出函数命令到finsh shell中 */
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FINSH_FUNCTION_EXPORT(_tc_timer_timeout, a thread timer testcase);
#else
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/* 用户应用入口 */
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int rt_application_init()
{
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timer_timeout_init();
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return 0;
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}
#endif