stm32 FreeRTOS中如何创建任务

#include "config.h"
#include "global.h"
#include "stdio.h"
#include "PC.h"

#include "FreeRTOS.h"
#include "task.h"
#include "list.h"

void vLED1Task(void *pvParameters)
{
	while(1)
	{
		GPIO_Reverse ();
		vTaskDelay(1000/portTICK_RATE_MS);		
	}
}
void vLED2Task(void *pvParameters)
{
	portTickType xLastWakeTime;
	//xLastWakeTime=xTaskGetTickCount();
	while(1)
	{
		LED_Reverse();
		vTaskDelay(200/portTICK_RATE_MS);
		//vTaskDelayUntil(&xLastWakeTime,(1000/portTICK_RATE_MS));
	}	
}

void vUARTTask(void *pvParameters)
{
	while(1)
	{
	    USART_SendData (USART1 ,0xAA);
	    vTaskDelay(1000/portTICK_RATE_MS);
	}
}

int main(void)
{
    BSP_INIT();
    xTaskCreate(vLED1Task,"led1",50,NULL,1,NULL);
    xTaskCreate(vLED2Task,"led2",50,NULL,2,NULL);
    xTaskCreate(vUARTTask,"UART",50,NULL,3,NULL);
	
    vTaskStartScheduler();//
    return 0;

}