freertos定时器Demo

在FreeRTOS中，定时器函数不是在Tick中断中执行的。Tick中断只负责判断定时器是否超时，而定时器函数的执行是在任务中完成的。你可以通过创建一个任务来执行定时器函数。下面是一个示例：

#include "FreeRTOS.h"
#include "task.h"
#include "timers.h"

TimerHandle_t TimerHandle1;
TimerHandle_t TimerHandle2;

static void timer1Intterp(TimerHandle_t timer1) {
    printf("timer1 is doing\r\n");
}

static void timer2Intterp(TimerHandle_t timer2) {
    printf("timer2 is doing\r\n");
}

void timerTask(void *pvParameters) {
    TimerHandle_t timer = (TimerHandle_t)pvParameters;

    while(1) {
        vTaskDelay(pdMS_TO_TICKS(100));

        if (xTimerIsTimerActive(timer) && xTimerIsTimerExpiredFromISR(timer)) {
            xTimerReset(timer, 0);

            if (timer == TimerHandle1) {
                timer1Intterp(TimerHandle1);
            } else if (timer == TimerHandle2) {
                timer2Intterp(TimerHandle2);
            }
        }
    }
}

int main( void ) {
    prvSetupHardware();

    TimerHandle1 = xTimerCreate("timer1", pdMS_TO_TICKS(100), pdFALSE, 0, NULL);
    TimerHandle2 = xTimerCreate("timer2", pdMS_TO_TICKS(100), pdTRUE, 0, NULL);

    xTaskCreate(timerTask, "timerTask1", configMINIMAL_STACK_SIZE, (void *)TimerHandle1, tskIDLE_PRIORITY + 1, NULL);
    xTaskCreate(timerTask, "timerTask2", configMINIMAL_STACK_SIZE, (void *)TimerHandle2, tskIDLE_PRIORITY + 1, NULL);

    vTaskStartScheduler();

    return 0;
}

在这个示例中，我们创建了两个定时器：TimerHandle1和TimerHandle2，并且分别创建了两个任务timerTask1和timerTask2来执行定时器函数timer1Intterp和timer2Intterp。定时器函数的执行是在任务中完成的。