学习计数型信号量的使用方法

/* task00 info */
configSTACK_DEPTH_TYPE Task00_STACK_SIZE = 5;
UBaseType_t  Task00_Priority = 1;
TaskHandle_t Task00_xHandle;

/* task01 info */
configSTACK_DEPTH_TYPE Task01_STACK_SIZE = 5;
UBaseType_t  Task01_Priority = 3;
TaskHandle_t Task01_xHandle;

//计数型信号量
SemaphoreHandle_t CountSemaphore;

void vTask00_Code(void *para)
{
    static unsigned int cnt = 0;
    BaseType_t err = pdTRUE;
    for (;;)
    {
        PRINT(" task00 cnt %u...", cnt++);
        err = xSemaphoreGive(CountSemaphore);
        if (err != pdTRUE)
            PRINT("BinarySemaphore give failed!\n");
        vTaskDelay(200);
        if (cnt == 4)
            vTaskDelete(Task00_xHandle);
    }
}

void vTask01_Code(void *para)
{
    static unsigned int cnt = 0;
    BaseType_t err = pdTRUE;
    for (;;)
    {
        xSemaphoreTake(CountSemaphore, portMAX_DELAY);
        PRINT(" task01 cnt %u...", cnt++);
        vTaskDelay(1000);
    }
}

void test_CountSemaphore()
{
    CountSemaphore = xSemaphoreCreateCounting(10, 0);
    
    if (xTaskCreate(vTask00_Code, "task00 task", 
        Task00_STACK_SIZE, NULL, Task00_Priority,
        &Task00_xHandle) != pdPASS)
    {
        PRINT("creat task00 failed!\n");
    }
    
    if (xTaskCreate(vTask01_Code, "task01 task", 
        Task01_STACK_SIZE, NULL, Task01_Priority,
        &Task01_xHandle) != pdPASS)
    {
        PRINT("creat task01 failed!\n");
    }
}


void creat_task(void)
{
    test_CountSemaphore();
}

$ ./build/freertos-simulator 
 task00 cnt 0...
 task01 cnt 0...
 task00 cnt 1...
 task00 cnt 2...
 task00 cnt 3...
 task01 cnt 1...
 task01 cnt 2...
 task01 cnt 3...