STM32F107VCT6的串口3问题

1万 · 2018-8-27 20:22

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！

1万 · 2018-8-27 20:25

可以尝试下排除硬件问题

1万 · 2018-8-27 20:27

两个板子都是没反应呢

1万 · 2018-8-27 20:29

两个板子都是没反应呢

2万 · 2018-8-27 20:30

还要设置AFIO时钟，和引脚的；

1万 · 2018-8-27 20:32

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);
}

只看该作者 · 2018-8-28 19:53

百度搜索一下串口3的例程还是很多的。

2万 · 2018-8-29 08:22

UART3 这个外设的时钟未使能

1万 · 2018-8-29 08:24

RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART3 | RCC_APB2Periph_AFIO, ENABLE);这么明显的问题

1万 · 2018-8-29 08:25

哦，那我就知道怎么回事了，多谢大家，结贴了哈