STM8S105C6T6 UART2串口，能接收数据，不能发送数据

jeeseliu · 发表于 2019-8-11 09:36:36

STM8S105C6T6 UART2串口，能接收数据，不能发送数据，哪位大神能帮忙看看。现在单片机自发自收没有问题，串口自发自收也没有问题，但是两个连接起来就单片机只能接收数据，发送数据，串口无接收
工具：USB转TTL
以下是程序代码：

void UART2_GPIO_init()
{
GPIO_DeInit(GPIOD);
//GPIO_Init(GPIOD,GPIO_PIN_5,GPIO_MODE_IN_PU_NO_IT);//串口通讯TX
GPIO_Init(GPIOD,GPIO_PIN_5,GPIO_MODE_OUT_PP_LOW_FAST);
//GPIO_Init(GPIOD, GPIO_PIN_5, GPIO_MODE_OUT_PP_HIGH_FAST);
GPIO_Init(GPIOD,GPIO_PIN_6, GPIO_MODE_IN_FL_NO_IT);//串口通讯RX
}

void UART2_ConfigurationInit(void)
{
UART2_GPIO_init();
  UART2_DeInit();
  UART2_Init((u32)9600,
         UART2_WORDLENGTH_8D,
         UART2_STOPBITS_1,
         UART2_PARITY_NO,
         UART2_SYNCMODE_CLOCK_DISABLE,
         UART2_MODE_TXRX_ENABLE);  //波特率 9600 8位数据  1个停止位  没有奇偶校验关闭SCK 同意串口接受和发送
  UART2_ITConfig(UART2_IT_RXNE_OR,ENABLE);//开启读中断，接收数据寄存器非空或溢出错误中断
  //UART2_ITConfig(UART2_IT_TXE,ENABLE);//开启写中断
UART2_Cmd(ENABLE);//启用串口
}

void UART2_Close()
{
  UART2_Cmd(DISABLE);
  UART2_ITConfig(UART2_IT_RXNE_OR,DISABLE);//关读中断，接收数据寄存器非空或溢出错误中断
  UART2_ITConfig(UART2_IT_TXE,DISABLE);//关写中断
}

void Send_Data(u8 Data)

{
  /*while((UART2_GetFlagStatus(UART2_FLAG_TXE)==RESET));
//待发送寄存器为空
   UART2_SendData8((unsigned char)Data);

   while((UART2_GetFlagStatus(UART2_FLAG_TC)==RESET));
//传输完成的标志
  */
unsigned int j;
while((UART2_GetFlagStatus(UART2_FLAG_TXE)==RESET));
//待发送寄存器为空
  UART2_SendData8(Data);
while((UART2_GetFlagStatus(UART2_FLAG_TC)==RESET));
//UART2_ClearFlag(UART2_FLAG_TC);
//j=50;
//while(j--);

}

//发送字符串Send_Str("STM8SUART \r\n")
void Send_Str(unsigned char *Data)
{
while(*Data!='\0')
{
Send_Data(*Data);
Data++;
}
}

INTERRUPT_HANDLER(UART2_TX_IRQHandler, 20)//发送数据中断
{
/* In order to detect unexpected events during development,
   it is recommended to set a breakpoint on the following instruction.
*/

// 写操作自动清中断，因此可以不用显式清中断
//UART2_ClearITPendingBit(UART2_IT_TXE);

}

/**
  * @brief UART2 RX interrupt routine.
  * @param  None
  * @retval None
  */
INTERRUPT_HANDLER(UART2_RX_IRQHandler, 21)//接收数据中断
{
/* In order to detect unexpected events during development,
   it is recommended to set a breakpoint on the following instruction.
UART2_ClearITPendingBit(UART2_IT_RXNE);
Uart2RecData = UART2_ReceiveData8();
Send(Uart2RecData);
*/
// 读操作自动清中断，因此可以不用显式清中断
// 注意这里的中断名是RXNE，不是RXNE_OR

Uart2RecData = UART2_ReceiveData8();
  UART2_SendData8(Uart2RecData);
UART2_ClearITPendingBit(UART2_IT_RXNE);
}