Question

我使用FreeRTOS v9处理STM32F4-Discovery。我有2个任务，任务1用于闪烁LED，任务2用于使用LwIP进行etherenet连接。

任务1

void test_print(void)
{
    TickType_t wake_time,tamp1,tamp2;
    const uint32_t period = 100;
    char buff[32];

    wake_time = xTaskGetTickCount();
    while(1)
    {
        USART_puts("aaaaaaaaaaa\n ");
        GPIO_SetBits(GPIOD,GPIO_Pin_13);
        delay_dw(500); //This is just my own function delay
        GPIO_ResetBits(GPIOD,GPIO_Pin_13);
        delay_dw(500);
    }
}

任务2

void echo_tcp()
{
    int c1,c2;
    char clock[32],tmp[32];
    tamp = 0;
    while(1)
    {
            if(ETH_CheckFrameReceived())
            {
                cycle_start();
                c1 = getCycles();
                LwIP_Pkt_Handle();      
                c2 = getCycles();
                cycle_stop();

                tamp+= c2 - c1;
                GPIO_SetBits(GPIOD,GPIO_Pin_12);
                delay_dw(2000);
                GPIO_ResetBits(GPIOD,GPIO_Pin_12);
                delay_dw(2000);
            }
            else
            {
                GPIO_ResetBits(GPIOD,GPIO_Pin_12);
                LwIP_Periodic_Handle(LocalTime);
            }
    }
}

我使用定时器功能进行中断。在这种情况下，中断的目的是向我展示当我在一起运行2个任务时给出一些连接负载时每1秒任务2的周期。

这是我的中断配置

void TIM2_Config(){
    TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
    RCC_PCLK1Config(RCC_HCLK_Div16);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE);
    TIM_TimeBaseStructure.TIM_Prescaler = 42000-1;
    TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
    TIM_TimeBaseStructure.TIM_Period = 200-1;
    TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
    TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
    TIM_TimeBaseInit(TIM2,&TIM_TimeBaseStructure);
    TIM_Cmd(TIM2,ENABLE);
}   


void TIM_IT_Enable(){
    TIM_ITConfig(TIM2,TIM_IT_Update, ENABLE);
}
void NVIC_Config(){
    NVIC_InitTypeDef NVIC_InitStrurture;
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
    NVIC_InitStrurture.NVIC_IRQChannel = TIM2_IRQn;
    NVIC_InitStrurture.NVIC_IRQChannelPreemptionPriority = 0x00;
    NVIC_InitStrurture.NVIC_IRQChannelSubPriority = 0x00;
    NVIC_InitStrurture.NVIC_IRQChannelCmd =ENABLE;
    NVIC_Init(&NVIC_InitStrurture);
}

int nInterrupt=0,counter;
char buffer[32];
char buf_temp[32];
void TIM2_IRQHandler(){
    if(TIM_GetITStatus(TIM2,TIM_IT_Update)!=RESET){
        TIM_ClearITPendingBit(TIM2,TIM_IT_Update);
        nInterrupt++;
        //USART_puts("Interrupt!!\n");

        sprintf(buf_temp,"%d\n",temp); //tamp is int variable
        USART_puts(buf_temp); //BUG IN HERE

        temp = 0;
    }
}

当我编译它并将其上传到我的STM32F4-Discovery时，所有任务都没有运行，但是当我在TIM2_IRQHandler（）函数上命令（禁用）usart函数时，所有任务都运行良好。如果我这样做，我就无法看到我的任务循环。有人帮忙吗？

抱歉英文不好

问候，拉玛

STM32F407定时器中断

0 个答案: