代码:
- #include "at32l021_board.h"
- #include "at32l021_clock.h"
- #include "FreeRTOS.h"
- #include "task.h"
- #include "semphr.h"
- /** @addtogroup UTILITIES_examples
- * @{
- */
- QueueHandle_t xBinarySemaphore;
- /** @addtogroup FreeRTOS_demo
- * @{
- */
- static void vPeriodicTassk(void *pvParamters)
- {
- button_type key;
- while(1)
- {
- key=at32_button_press();
- if(key==0)
- {
- if(xBinarySemaphore!=NULL)
- {
- xSemaphoreGive(xBinarySemaphore);
- }
-
-
- //LED0_TOGGLE();
- //vTaskDelay(10);
- }/* 延时1000ticks */
- }
- }
- static void vHandlerTask(void *pvParamters)
- {
- for(;;)
- {
- xSemaphoreTake(xBinarySemaphore,portMAX_DELAY);
- //printf("Handler task - Processing event.\r\n");
- if(xBinarySemaphore!=NULL)
- {
- at32_led_toggle(LED2);
- }
- //vTaskDelay(500);
- }
- }
- /**
- * [url=home.php?mod=space&uid=247401]@brief[/url] main function.
- * @param none
- * @retval none
- */
- int main(void)
- {
- system_clock_config();
- at32_board_init();
- /* init led2 and led3 */
- at32_led_init(LED2);
- at32_led_init(LED3);
- /* init usart1 */
- uart_print_init(115200);
-
- /* enter critical */
- taskENTER_CRITICAL();
- vSemaphoreCreateBinary(xBinarySemaphore);
- /* create led2 task */
- xTaskCreate((TaskFunction_t )vPeriodicTassk,
- (const char* )"vTask1",
- (uint16_t )128,
- (void* )NULL,
- (UBaseType_t )1,
- (TaskHandle_t* )NULL);
-
- /* create led3 task */
- xTaskCreate((TaskFunction_t )vHandlerTask,
- (const char* )"vTask2",
- (uint16_t )128,
- (void* )NULL,
- (UBaseType_t )2,
- (TaskHandle_t* )NULL) ;
-
- /* exit critical */
- taskEXIT_CRITICAL();
- /* start scheduler */
- vTaskStartScheduler();
- }
效果图
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