STM32G0学习手册——FreeRTOS消息队列
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1.创建好带有printf-stdarg.c的FreeRTOS的工程
2.修改main.c文件
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include <stdio.h>
#include <string.h>
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define QUEUE_LEN 4
#define QUEUE_SIZE 4
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
static TaskHandle_t CreateAppTask_Handle = NULL;
static TaskHandle_t Led1Task_Handle = NULL;
static TaskHandle_t Led2Task_Handle = NULL;
static QueueHandle_t Message1 = NULL;
extern int f_printf(const char *format, ...);
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
static void CreateAppTask(void);
static void Led1Task(void);
static void Led2Task(void);
/* USER CODE END PV */
int main()
{
/**/
/* USER CODE BEGIN 2 */
UBaseType_t xReturn = pdPASS;
xReturn = xTaskCreate((TaskFunction_t) CreateAppTask,
(const char *) "CAP",
(uint16_t) 512,
(void *) NULL,
(UBaseType_t) 1,
(TaskHandle_t *) &CreateAppTask_Handle);
if(xReturn == pdPASS)
{
f_printf("start.\\r\\n");
vTaskStartScheduler();
}
/* USER CODE END 2 */
while(1)
{
}
}
/* USER CODE BEGIN 4 */
static void CreateAppTask(void)
{
UBaseType_t xReturn = pdPASS;
taskENTER_CRITICAL();
/*消息队列任务一定要在调用的任务前面创建，不然代码运行不了*/
Message1 = xQueueCreate((UBaseType_t)QUEUE_LEN , (UBaseType_t)QUEUE_SIZE);
taskEXIT_CRITICAL();
xReturn = xTaskCreate((TaskFunction_t) Led1Task,
(const char *) "LED1TASK",
(uint16_t) 512,
(void *) NULL,
(UBaseType_t) 1,
(TaskHandle_t *) &Led1Task_Handle);
xReturn = xTaskCreate((TaskFunction_t) Led2Task,
(const char*) "LED2TASK",
(uint16_t) 512,
(void *) NULL,
(UBaseType_t) 2,
(TaskHandle_t *) &Led2Task_Handle);
if(xReturn ==pdPASS)
f_printf("TASKCREATE PASS.\\r\\n");
if(NULL != Message1)
{
f_printf("QUEUE PASS.\\r\\n");
vTaskDelete((TaskHandle_t)CreateAppTask_Handle);
}
}
static void Led1Task(void)
{
while(1)
{
UBaseType_t xReturn ;
uint16_t a=1;
uint16_t temp=0;
uint16_t temp2=0;
if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0))
{
for(temp = 0 ; temp < 10 ; temp++)
{
if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0))
{
temp2 |= 1;
temp2 <<= 1;
vTaskDelay(30);
}
else
{
temp2 &= 0xFFFE;
temp2 <<= 1;
vTaskDelay(30);
}
}
if(temp2 > 0x1F)
{
xReturn = xQueueSend(Message1,&a,0);
if(xReturn == pdPASS)
f_printf("SEND PASS \\r\\n");
}
}
}
}
static void Led2Task(void)
{
while(1)
{
BaseType_t xReturn = pdTRUE;
uint16_t receive_buff ;
xReturn = xQueueReceive (Message1, &receive_buff,portMAX_DELAY);
if(xReturn == pdTRUE)
{
HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_1);
f_printf("RECEIVE PASS\\r\\n");
}
}
}
/* USER CODE END 4 */
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