STM32F103ZET6串口2可以串口3收到的是乱码

zzq11986 · 发表于 2017-5-8 10:33:05

本帖最后由 zzq11986 于 2017-5-8 10:36 编辑

各位路过大侠请指点：
下面为串口代码：串口2正常接收
void USART2_Init(void)
{
         GPIO_InitTypeDef GPIO_InitStructure;
      USART_InitTypeDef USART_InitStructure;
      NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);//使能GPIOA时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);//使能USART2时钟



GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;    //推挽输出-TX
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入-RX
GPIO_Init(GPIOA, &GPIO_InitStructure);

      /*串口2参数初始化*/

USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
            USART_Init(USART2,&USART_InitStructure);

      //USART_DeInit(USART2);//复位串口2


      USART_Cmd(USART2,ENABLE);/*使能串口2*/

      USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);//开启串口2接收中断，用到时开启

      NVIC_InitStructure.NVIC_IRQChannel=USART2_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority=2;
      NVIC_Init(&NVIC_InitStructure);//中断初始化
}

void USART2_IRQHandler(void) //中断请求处理函数
{
  u8 res;
      if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
      {
         res= USART_ReceiveData(USART2); //接收串口2数据
   USART_SendData(USART2,res);    //将res发送给USART2
      }
}

int main(void)
{
delay_init();
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//将中断优先级设置为组2
USART2_Init();
while(1);
}

下面为串口3代码、电路板连接图片和串口软件图片，串口发出来的数据，电脑接收为乱码
void USART3_Init(void)
{
         GPIO_InitTypeDef GPIO_InitStructure;
      USART_InitTypeDef USART_InitStructure;
      NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);//使能GPIOB时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3,ENABLE);//使能USART3时钟



GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;    //推挽输出-TX
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入-RX
GPIO_Init(GPIOB, &GPIO_InitStructure);

      /*串口3参数初始化*/

USART_InitStructure.USART_BaudRate = 9600;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
            USART_Init(USART3,&USART_InitStructure);

      //USART_DeInit(USART2);//复位串口3


      USART_Cmd(USART3,ENABLE);/*使能串口3*/

      USART_ITConfig(USART3,USART_IT_RXNE,ENABLE);//开启串口3接收中断，用到时开启

      NVIC_InitStructure.NVIC_IRQChannel=USART3_IRQn;
      NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
      NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2;
      NVIC_InitStructure.NVIC_IRQChannelSubPriority=2;
      NVIC_Init(&NVIC_InitStructure);//中断初始化
}

void USART3_IRQHandler(void) //中断请求处理函数
{
  u8 res;
      if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
            {
                     res= USART_ReceiveData(USART3); //接收串口3数据
                     USART_SendData(USART3,res);    //将res发送给USART3
            }

}

int main(void)
{
delay_init();
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);//将中断优先级设置为组2
USART3_Init();
while(1);

电脑收到的乱码