STM32 进入空闲中断疑问

520sky · 发表于 2017-1-11 17:05:27

软件仿真 STM32，虚拟串口接串口调试助手，开启 IDLE空闲中断，串口助手给STM32发字符串，但只有结尾是空格/0/@ 才会触发空闲中断，其他字符怎么发都不会触发

520sky · 发表于 2017-1-12 14:31:00

帮顶~~~~~~~~

电子之旅 · 发表于 2017-1-15 17:39:25

楼主贴你的代码给大家分析

520sky · 发表于 2017-1-16 09:51:12

本帖最后由 520sky 于 2017-1-16 09:53 编辑

代码如下，最新发现凡是 0x?0格式的ascii码字符(上面提及字符均符合这种格式) 结尾的字符串可以触发IDLE

[mw_shl_code=c,true]void USART1_IRQHandler(void){

      //char tmp[BUF_DATA_SIZE];

      //if(USART_GetITStatus(USART1, USART_IT_RXNE) == SET){
      //       USART_ReceiveData(USART1);
      //       DMA_reset();
      //}

      if(USART_GetITStatus(USART1, USART_IT_IDLE) == SET){

            DMA_Cmd(DMA1_Channel5,DISABLE);

            //Çå3yÖD¶Ï±êÖ¾
            buf_data_length = USART1->SR;
      buf_data_length = USART1->DR;

            buf_data_length = BUF_DATA_SIZE - DMA_GetCurrDataCounter(DMA1_Channel5);

            //ÖØÖÃDMA
            DMA_SetCurrDataCounter(DMA1_Channel5,BUF_DATA_SIZE);
      DMA_Cmd(DMA1_Channel5,ENABLE);
      }
}

void DMA_Channel5_IRQHandler(void){

      if(DMA_GetITStatus(DMA1_IT_TC5) == SET){
            DMA_ClearITPendingBit(DMA1_IT_TC5);
            DMA_Config();
      }
}

//GPIO¿úÅäÖÃ
void GPIO_Config(void){

      GPIO_InitTypeDef GPIO_InitStructure;

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
      GPIO_Init(GPIOA, &GPIO_InitStructure);


      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
      GPIO_Init(GPIOA, &GPIO_InitStructure);

      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
      GPIO_Init(GPIOA, &GPIO_InitStructure);
}

//′®¿úÅäÖÃ
void USART_Config(void){

      USART_InitTypeDef usart_config;
      usart_config.USART_BaudRate = 115200;
      usart_config.USART_WordLength = USART_WordLength_8b;
      usart_config.USART_StopBits = USART_StopBits_1;
      usart_config.USART_Parity = USART_Parity_No;
      usart_config.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
      usart_config.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;

      USART_Init(USART1, &usart_config);

      usart_config.USART_BaudRate = 57600;

      USART_Init(USART2, &usart_config);

      //USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
      //USART_ITConfig(USART1, USART_IT_IDLE, ENABLE);
      //USART_ClearFlag(USART1, USART_FLAG_TC);

      RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
      RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);

      USART_Cmd(USART1,ENABLE);
      USART_Cmd(USART2,ENABLE);

      USART_DMACmd(USART1,USART_DMAReq_Rx,ENABLE);

}

void NVIC_Configuration(void){

      NVIC_InitTypeDef NVIC_InitStructure;

      NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 3;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

      NVIC_Init(&NVIC_InitStructure);

      NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel5_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 4;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
      NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

      NVIC_Init(&NVIC_InitStructure);

}

void DMA_Config(void){

      DMA_InitTypeDef DMA_InitStructure;

      RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);

      DMA_DeInit(DMA1_Channel5);

      DMA_InitStructure.DMA_PeripheralBaseAddr = (USART1_BASE + 0x4);
      DMA_InitStructure.DMA_MemoryBaseAddr = (u32)buf_data;
      DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
      DMA_InitStructure.DMA_BufferSize = BUF_DATA_SIZE;
      DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
      DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
      DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
      DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte;
      DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
      DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
      DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
      DMA_Init(DMA1_Channel5, &DMA_InitStructure);

      DMA_ITConfig(DMA1_Channel5, DMA_IT_TC, ENABLE);
      DMA_Cmd(DMA1_Channel5,ENABLE);
}[/mw_shl_code]