请教STM32F107VCT6的串口3问题，谢谢

xiaobocekong

我要使用STM32F107VCT6的串口3，引脚是B10和B11。我按串口1设置的顺序（时钟，引脚，中断管理，中断处理）设置，可是串口3一点反应都没有，不知与串口1的设置有啥不同，谢谢！

xuzhiping9889

应该是没有什么太大的区别，可能还是你哪里配置的问题

xiaobocekong

测试了还是不行，把源码贴上：
int main(void)
{
   
        
  /* System Clocks Configuration */
    SystemInit();
   /* Configure the GPIO ports */
   GPIO_Configuration();
   TIM2_Configuration();
  UTRA3_Configuration();
   /* NVIC configuration */
   NVIC_Configuration();
   Uart_InterruptsendY(USART3,ddd1,3);///wwwwwwwwwwwwwwwwwwwwwwwwwww
   while (1)
   {
   }
}

void GPIO_Configuration(void)
{
   GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART3 | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB, ENABLE);

  /* Configure USARTx_Tx as alternate function push-pull */
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//10
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
   GPIO_Init(GPIOB, &GPIO_InitStructure);

  /* Configure USARTx_Rx as input floating */
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;//11
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
   GPIO_Init(GPIOB, &GPIO_InitStructure);
}

void UTRA3_Configuration(void)
{
/* USARTy and USARTz configuration ------------------------------------------------------*/
   /* 9600  8  n  1
   */
   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;
   /* Configure USARTy */
   USART_Init(USART3, &USART_InitStructure);
   /* Configure USARTz */
  /* Enable USARTy Receive and Transmit interrupts */
   USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
// USART_ITConfig(USART1, USART_IT_TXE, ENABLE);//使能中断 这里先不使能  在后面中断发送之前发送
   USART_Cmd(USART3, ENABLE);   
}

void NVIC_Configuration(void)
{
   NVIC_InitTypeDef NVIC_InitStructure;

  /* Configure the NVIC Preemption Priority Bits */  
   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
   
   /* Enable the USARTy Interrupt */
   NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);
   NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);
}

void Uart_InterruptsendY(USART_TypeDef *USARTx,vu8* Uart0_sended,u8 NbOfBytes )
{   
       Uart_send_counter=NbOfBytes;
       Uart_send_pointer=Uart0_sended;
      USART_SendData(USARTx, *Uart_send_pointer++);
      USART_ITConfig(USARTx, USART_IT_TXE, ENABLE);
        //UART_ITConfig(UARTx,UART_IT_TxEmpty, ENABLE);
}

jinhuo3711

串口3的时钟好像只有一半的

wongT

试试把  NVIC_Configuration();
放到所有初始化完之后，while 上一行

xiaobocekong

硬件的问题，在此谢谢各位！