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); } |
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