STM32

STM32F407串口6不能发送数据，串口1可以发送数据，USART6哪里有问题呢？谢谢

2019-07-20 19:21发布

站内问答 / STM32/STM8
3238 4 1634
void USART6_Config(u32 bound){
     //GPIO配置
     GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;
     
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE); //????GPIOC?±??
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART6,ENABLE);//????USART6?±??
  
    GPIO_PinAFConfig(GPIOC,GPIO_PinSource6,GPIO_AF_USART6); //GPIOC6??????USART6
    GPIO_PinAFConfig(GPIOC,GPIO_PinSource7,GPIO_AF_USART6); //GPIOC7??????USART6
     
     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7; //GPIOC6??GPIOC7
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//????????
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;   //????50MHz
    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //???ì????????
    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; //????
    GPIO_Init(GPIOC,&GPIO_InitStructure); //??????PC6??PC7

     //USART6 ???????è??
    USART_InitStructure.USART_BaudRate = bound;//?¨?????è??
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;//×??¤??8??????????
    USART_InitStructure.USART_StopBits = USART_StopBits_1;//??????????
    USART_InitStructure.USART_Parity = USART_Parity_No;//?????????é??
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//???????????÷????
    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //??·?????
     USART_Init(USART6, &USART_InitStructure); //???????®??6
     
     USART_Cmd(USART6, ENABLE);  //?????®??6
     
    USART_ClearFlag(USART6, USART_FLAG_TC);
}
void USART6_IT_Config(void)
{
     NVIC_InitTypeDef NVIC_InitStructure;
   
    USART_ITConfig(USART6, USART_IT_RXNE, ENABLE);//?????à??????
     USART_ITConfig(USART6, USART_IT_TXE, ENABLE);
    //Usart6 NVIC ????
     NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//?è????????????????·?×é2
     NVIC_InitStructure.NVIC_IRQChannel = USART6_IRQn;//?®??6?????¨??
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;//??????????3
    NVIC_InitStructure.NVIC_IRQChannelSubPriority =2;       //×???????2
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;         //IRQ?¨??????
    NVIC_Init(&NVIC_InitStructure); //?ù?????¨????????????NVIC?????÷??

}

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4条回答
zhangweipeng
2019-07-21 01:30
试一下把这句话提前，NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);像原子例程放到C:UserszhangDocuments360截图

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