STM32F103上运行信号量出错

Daliwan

鄙人新手，在STM32F103开发板上试用freeRTOS，创建了两个任务和一个定时器中断。从中断中发出一个信号量给一个任务，让这个任务打印一串字符。另一个任务周期打印字符作为对照。当不加信号量时，两个任务都周期打印，定时器也定时中断打印，工作正常。加入信号量之后，编译正常不报错，但是下载到开发板就没有任何反应。使用Debug跟踪，发现在刚刚运行到定时器初始化时就跑到HardFault_Handler去了。麻烦请大家帮我看看怎么回事。下面是程序：/* main.c */

#include "stm32f10x.h"
#include "stm32f10x_tim.h"
#include "stm32f10x_conf.h"
#include "stm32f10x_gpio.h"
#include "stm32f10x_usart.h"
#include "FreeRTOS.h"
#include "task.h"
#include "queue.h"
#include "semphr.h"
#include "list.h"
#include "misc.h"
#include "portable.h"
#include "FreeRTOSConfig.h"
#include "usart1.h"
#include "timerConfig.h"


#define stackSize_task1 1024
#define stackSize_task2 1024

static void vUART1_1_Task(void *pvParameters);
static void vUART1_2_Task(void *pvParameters);


SemaphoreHandle_t xBinarySemaphore;

int main(void)
{

        USART1_Config();
        TIM2_Init();       

        xBinarySemaphore = xSemaphoreCreateBinary();       
        if (xBinarySemaphore != NULL)
        {
                xTaskCreate(vUART1_1_Task, (const portCHAR*)"UART1_1", stackSize_task1, NULL, tskIDLE_PRIORITY, NULL );
                xTaskCreate(vUART1_2_Task, (const portCHAR*)"UART1_2", stackSize_task2, NULL, tskIDLE_PRIORITY, NULL );
                vTaskStartScheduler();
        }
       
        return 0;
}



void vUART1_1_Task(void *pvParameters)
{
        TickType_t xDelay = pdMS_TO_TICKS(2000);
        while(1)
        {
                printf("\r\n This is task1 ! \r\n");
                vTaskDelay(xDelay);  //ÑÓʱ2s       
        }
}


void vUART1_2_Task(void *pvParameters)
{
        while(1)
        {
                if(xSemaphoreTake(xBinarySemaphore, portMAX_DELAY))
                {
                        printf("Semaphore works!\n\r");
                }
        }
               
//        TickType_t xDelay = pdMS_TO_TICKS(2000);
//        while(1)
//        {
//                printf("\r\n This is task2 !!! \r\n");
//                vTaskDelay(xDelay);  //ÑÓʱ2s       
//        }
}


/* timerConfig.c*/
#include "FreeRTOS.h"
#include "semphr.h"
#include "timerConfig.h"
#include "misc.h"
#include "usart1.h"
#include "stm32f10x_tim.h"



void TIM2_Init(void)
{
    TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
        NVIC_InitTypeDef NVIC_InitStructure;

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
       
        TIM_TimeBaseStructure.TIM_Period = TIM2_Period;
        TIM_TimeBaseStructure.TIM_Prescaler = TIM2_Prescaler;
        TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  
        TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);
        TIM_ITConfig(TIM2,TIM_IT_Update,ENABLE );
       
        NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;  
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);  

        TIM_Cmd(TIM2, ENABLE);                           
}

void TIM2_IRQHandler(void)   
{
        extern SemaphoreHandle_t xBinarySemaphore;       
        BaseType_t xHigherPriorityTaskWoken;
       
        if (TIM_GetITStatus(TIM2, TIM_IT_Update) != RESET)  
                {               
                        TIM_ClearITPendingBit(TIM2, TIM_IT_Update  );   
                        xHigherPriorityTaskWoken = pdTRUE;
                        xSemaphoreGive(xBinarySemaphore);
                        portYIELD_FROM_ISR(xHigherPriorityTaskWoken);
//                        printf("\r\n Timer !!! \r\n");
                }
       
}

wwhh

任务二  使用信号量 不应该用if语句