【AT-START-L021测评】FREERTOS之计数信号量
代码：#include "at32l021_board.h"
#include "at32l021_clock.h"
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"
#include "stdio.h"
/** @addtogroup UTILITIES_examples
* @{
*/
int cnt=0;
QueueHandle_t CountSemaphore;
/** @addtogroup FreeRTOS_demo
* @{
*/
button_type key=1;
//unsigned char const mainSENDER_1=30;
//unsigned char const mainSENDER_2=50;
button_type at32_button_press(void);
void task1(void *pvParameters)
{
unsigned int i;
UBaseType_t err;
while(1)
{
key=at32_button_state();
if(key==1)
{
for(i=0;i<3000;i++);
key=at32_button_state();
if(key==1)
{
while(1)
{
key=at32_button_state();
if(key==0)
break;
}
err=xSemaphoreGive(CountSemaphore);
if(err==pdFALSE)
{
printf("Sem Rele Failed!\r\n");
//flag=0;
}
else
{
printf("Sem Role Succeed!\r\n");
//flag=1;
}
}
}/* 延时1000ticks */
vTaskDelay(10);
taskYIELD();
}
}
/**
* @brief task2
* @param pvParameters : 传入参数(未用到)
* @retval 无
*/
void Keyprocess_task(void *pvParameters)
{
unsigned int i=0;
UBaseType_t semavalue=0;
while(1)
{
if(CountSemaphore!=NULL)
{
xSemaphoreTake(CountSemaphore,portMAX_DELAY);
semavalue=uxSemaphoreGetCount(CountSemaphore);
printf("semavalue value=%d\r\n",(int)semavalue);
}
else
{
vTaskDelay(10);
}
//printf("Task2 Running!\r\n");
vTaskDelay(1000);
}
}
/**
* @briefmain function.
* @paramnone
* @retval none
*/
int main(void)
{
system_clock_config();
delay_init();
/* init led2 and led3 */
at32_led_init(LED2);
at32_led_init(LED3);
at32_button_init();
/* init usart1 */
uart_print_init(115200);
taskENTER_CRITICAL();
CountSemaphore=xSemaphoreCreateCounting(10,10);
if(CountSemaphore==NULL)
{
printf("create CountSemaphore failed!\r\n");
}
/* create led2 task */
xTaskCreate(task1,
"vTask1",
128,
(void *)30,
2,
NULL);
xTaskCreate(Keyprocess_task,
"vTask2",
128,
NULL,
3,
NULL);
taskEXIT_CRITICAL();
/* start scheduler */
vTaskStartScheduler();
}
运行效果图：
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