liangyuejie 发表于 2015-3-24 11:15:34

stmf429 usart1 进不了接收中断， 轮询可以接收

刚学单片机， 弄了2天没有搞定，希望大家帮帮忙。谢谢！

void USART_Config_USART1()
{   
    GPIO_InitTypeDef   GPIO_InitStructure9;
    GPIO_InitTypeDef   GPIO_InitStructure10;
    USART_InitTypeDefUSART_InitStructure;
    NVIC_InitTypeDef   NVIC_InitStructure;
   
    // Enable GPIO clock
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
   
    // Enable USART clock
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
   
// Configure USART Tx as alternate function
GPIO_InitStructure9.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure9.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure9.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure9.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure9.GPIO_PuPd = GPIO_PuPd_UP;
   
GPIO_Init(GPIOA, &GPIO_InitStructure9);
   
    // Configure USART Rx as alternate function
GPIO_InitStructure10.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure10.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStructure10.GPIO_PuPd = GPIO_PuPd_NOPULL;
   
GPIO_Init(GPIOA, &GPIO_InitStructure10);
   
    // Config AF pin
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);

// Initialize USART
USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
   
    USART_Init(USART1, &USART_InitStructure);
   
    // Enable USART interrupt
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
    //USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
   
    // Enable USART
USART_Cmd(USART1, ENABLE);
   
    // Initialize USART interrupt on NVIC
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0x0F;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);
}

void USART1_IRQHANDLER(void)
{   
if(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) != RESET)
{
      USART_GetFlagStatus(USART1, USART_FLAG_TC);
      
      // Read one byte from the receive data register
      USART_SendData(USART1, USART_ReceiveData(USART1));
      
      while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)
      {
      }
}
}

zfz0122 发表于 2015-3-24 11:32:00

不懂帮顶

小蚂蚁快溜跑 发表于 2015-3-24 13:14:23

复用端口，时钟没有打开

AnswerRaul 发表于 2015-3-24 13:40:32

重新配置一下中断优先级；
还不行，把Rx设置成上拉试试，我一直都是Rx跟Tx都上拉。

stary666 发表于 2015-3-24 14:06:32

帮顶。。。。。。。。。。

liangyuejie 发表于 2015-3-24 16:08:16

谢谢大家先，f429没有复用时钟的概念。

liangyuejie 发表于 2015-3-24 16:24:08

就是不行，我实在找不到原因：
void USART_Config_USART1()
{       
        GPIO_InitTypeDef    GPIO_InitStructure9;
        GPIO_InitTypeDef        GPIO_InitStructure10;
        USART_InitTypeDef   USART_InitStructure;
        NVIC_InitTypeDef    NVIC_InitStructure;
       
        USART_ClearITPendingBit(USART1, USART_IT_RXNE);
        USART_ClearFlag(USART1, USART_FLAG_RXNE);
       
        // Enable GPIO clock
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
       
        // Enable USART clock
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
       
    // Configure USART Tx as alternate function
    GPIO_InitStructure9.GPIO_Pin = GPIO_Pin_9;
        GPIO_InitStructure9.GPIO_Mode = GPIO_Mode_AF;
        GPIO_InitStructure9.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStructure9.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_InitStructure9.GPIO_PuPd = GPIO_PuPd_UP;
       
    GPIO_Init(GPIOA, &GPIO_InitStructure9);
       
        // Configure USART Rx as alternate function
    GPIO_InitStructure10.GPIO_Pin = GPIO_Pin_10;
        GPIO_InitStructure10.GPIO_Mode = GPIO_Mode_AF;
        GPIO_InitStructure10.GPIO_PuPd = GPIO_PuPd_UP;
       
    GPIO_Init(GPIOA, &GPIO_InitStructure10);
       
        // Config AF pin
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);

    // Initialize USART
    USART_InitStructure.USART_BaudRate = 9600;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
       
        USART_Init(USART1, &USART_InitStructure);
       
        // Enable USART interrupt
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
        //USART_ITConfig(USART1, USART_IT_TXE, ENABLE);
       
        // Enable USART
    USART_Cmd(USART1, ENABLE);
       
        #if defined(INNO_DEBUG)
                USART1_SendDataStrings("USART1 CMD enabled! \n");
        #endif
       
        // Initialize USART interrupt on NVIC
        NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0xF;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

    NVIC_Init(&NVIC_InitStructure);
       
        #if defined(INNO_DEBUG)
                USART1_SendDataStrings("USART1 NVIC enabled! \n");
        #endif
}

void USART_Config()
{
        USART_Config_USART1();
}

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
       
        /* USART configuration */
    USART_Config();
       
        #if defined(INNO_DEBUG)
                USART1_SendDataStrings("USART configuration finished! \n");
        #endif

liangyuejie 发表于 2015-3-24 16:35:14

CR1 RXNEIE = 1
DR 接收数据正确
SR RXNE = 0 始终

wambob 发表于 2015-3-24 16:43:20

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
      
      // Enable USART clock
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
容易出错的地方，看看参考手册

liangyuejie 发表于 2015-3-24 16:50:14

#define RCC_APB2Periph_USART1            ((uint32_t)0x00000010)

#define RCC_AHB1Periph_GPIOA             ((uint32_t)0x00000001)

应该也没有问题
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