luckfox-pico-sdk/sysdrv/source/mcu/rt-thread/examples/kernel/semaphore_dynamic.c
luckfox-eng29 8f34c2760d project:build.sh: Added fastboot support; custom modifications to U-Boot and kernel implemented using patches.
project:cfg:BoardConfig_IPC: Added fastboot BoardConfig file and firmware post-scripts, distinguishing between
the BoardConfigs for Luckfox Pico Pro and Luckfox Pico Max. project:app: Added fastboot_client and rk_smart_door
for quick boot applications; updated rkipc app to adapt to the latest media library. media:samples: Added more
usage examples. media:rockit: Fixed bugs; removed support for retrieving data frames from VPSS. media:isp:
Updated rkaiq library and related tools to support connection to RKISP_Tuner. sysdrv:Makefile: Added support for
compiling drv_ko on Luckfox Pico Ultra W using Ubuntu; added support for custom root filesystem.
sysdrv:tools:board: Updated Buildroot optional mirror sources, updated some software versions, and stored device
tree files and configuration files that undergo multiple modifications for U-Boot and kernel separately.
sysdrv:source:mcu: Used RISC-V MCU SDK with RT-Thread system, mainly for initializing camera AE during quick
boot. sysdrv:source:uboot: Added support for fastboot; added high baud rate DDR bin for serial firmware upgrades.
sysdrv:source:kernel: Upgraded to version 5.10.160; increased NPU frequency for RV1106G3; added support for
fastboot.

Signed-off-by: luckfox-eng29 <eng29@luckfox.com>
2024-10-14 09:47:04 +08:00

140 lines
3.5 KiB
C
Raw Blame History

This file contains ambiguous Unicode characters

This file contains Unicode characters that might be confused with other characters. If you think that this is intentional, you can safely ignore this warning. Use the Escape button to reveal them.

/*
* 程序清单:动态信号量
*
* 这个例子中将创建一个动态信号量初始值为0 )及一个动态线程,在这个动态线程中
* 将试图采用超时方式去持有信号量,应该超时返回。然后这个线程释放一次信号量,并
* 在后面继续采用永久等待方式去持有信号量, 成功获得信号量后返回。
*/
#include <rtthread.h>
#include "tc_comm.h"
/* 指向线程控制块的指针 */
static rt_thread_t tid = RT_NULL;
/* 指向信号量的指针 */
static rt_sem_t sem = RT_NULL;
/* 线程入口 */
static void thread_entry(void *parameter)
{
rt_err_t result;
rt_tick_t tick;
/* 获得当前的OS Tick */
tick = rt_tick_get();
/* 试图持有一个信号量如果10个OS Tick依然没拿到则超时返回 */
result = rt_sem_take(sem, 10);
if (result == -RT_ETIMEOUT)
{
rt_tick_t new_tick = rt_tick_get();
/* 可以有两个 tick 的误差 */
if (new_tick - tick >= 12)
{
rt_kprintf("tick error to large: expect: 10, get %d\n",
new_tick - tick);
/* 如果失败,则测试失败 */
tc_done(TC_STAT_FAILED);
rt_sem_delete(sem);
sem = RT_NULL;
return;
}
rt_kprintf("take semaphore timeout\n");
}
else
{
/* 因为并没释放信号量,应该是超时返回,否则测试失败 */
tc_done(TC_STAT_FAILED);
rt_sem_delete(sem);
sem = RT_NULL;
return;
}
/* 释放一次信号量 */
rt_sem_release(sem);
/* 继续持有信号量,并永远等待直到持有到信号量 */
result = rt_sem_take(sem, RT_WAITING_FOREVER);
if (result != RT_EOK)
{
/* 返回不正确,测试失败 */
tc_done(TC_STAT_FAILED);
rt_sem_delete(sem);
sem = RT_NULL;
return;
}
/* 测试成功 */
tc_done(TC_STAT_PASSED);
/* 删除信号量 */
rt_sem_delete(sem);
sem = RT_NULL;
}
int semaphore_dynamic_init()
{
/* 创建一个信号量初始值是0 */
sem = rt_sem_create("sem", 0, RT_IPC_FLAG_FIFO);
if (sem == RT_NULL)
{
tc_stat(TC_STAT_END | TC_STAT_FAILED);
return 0;
}
/* 创建线程 */
tid = rt_thread_create("thread",
thread_entry, RT_NULL, /* 线程入口是thread_entry, 入口参数是RT_NULL */
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;
}
#ifdef RT_USING_TC
static void _tc_cleanup()
{
/* 调度器上锁,上锁后,将不再切换到其他线程,仅响应中断 */
rt_enter_critical();
if (sem)
{
rt_sem_delete(sem);
sem = RT_NULL;
}
/* 删除线程 */
if (tid != RT_NULL && tid->stat != RT_THREAD_CLOSE)
{
rt_thread_delete(tid);
}
/* 调度器解锁 */
rt_exit_critical();
/* 设置TestCase状态 */
tc_done(TC_STAT_PASSED);
}
int _tc_semaphore_dynamic()
{
/* 设置TestCase清理回调函数 */
tc_cleanup(_tc_cleanup);
semaphore_dynamic_init();
/* 返回TestCase运行的最长时间 */
return 100;
}
/* 输出函数命令到finsh shell中 */
FINSH_FUNCTION_EXPORT(_tc_semaphore_dynamic, a dynamic semaphore example);
#else
/* 用户应用入口 */
int rt_application_init()
{
semaphore_dynamic_init();
return 0;
}
#endif