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金牌会员  
 
	积分2375金钱2375 注册时间2017-8-7在线时间207 小时 | 
 
5金钱 
| 附上代码,是我配置问题吗,还是怎么回事,电源供电充足,硬件应该是没有问题的 void USART_Configuration(void)
 {
 
 GPIO_InitTypeDef GPIO_InitStructure;//定义GPIO_InitTypeDef类型的结构体成员GPIO_InitStructure
 
 USART_InitTypeDef USART_InitStructure;
 USART_ClockInitTypeDef USART_ClockInitStruct;
 //使能USART1 时钟
 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);//Usart1
 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);//Usart2
 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);//Usart3
 ///复位串口1
 USART_DeInit(USART1);
 
 USART_StructInit(&USART_InitStructure);//载入默认USART参数
 USART_ClockStructInit(&USART_ClockInitStruct);//载入默认USART参数
 //配置串口1的管脚 PA8 USART1_EN PA9 USART1_TX PA10 USART1_RX
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;    //复用
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽输出
 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
 GPIO_Init(GPIOA, &GPIO_InitStructure);
 GPIO_PinAFConfig(GPIOA,GPIO_PinSource9,GPIO_AF_USART1);        //管脚PA9复用为USART1
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
 GPIO_Init(GPIOA, &GPIO_InitStructure);
 GPIO_PinAFConfig(GPIOA,GPIO_PinSource10,GPIO_AF_USART1);
 
 USART_ClockInit(USART1,&USART_ClockInitStruct);
 
 USART_InitStructure.USART_BaudRate = 115200;
 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;
 USART_Init(USART1,&USART_InitStructure);
 
 USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);        ///////接收中断使能
 USART_ClearITPendingBit(USART1, USART_IT_TC);//清除中断TC位
 USART_Cmd(USART1,ENABLE);//最后使能串口
 
 ///复位串口2
 USART_DeInit(USART2);
 
 USART_StructInit(&USART_InitStructure);//载入默认USART参数
 USART_ClockStructInit(&USART_ClockInitStruct);//载入默认USART参数
 //配置串口2的管脚 PD5 USART1_TX PD6 USART1_RX
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;    //复用
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽输出
 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
 GPIO_Init(GPIOD, &GPIO_InitStructure);
 GPIO_PinAFConfig(GPIOA,GPIO_PinSource5,GPIO_AF_USART2);        //管脚PD5复用为USART2
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
 GPIO_Init(GPIOD, &GPIO_InitStructure);
 GPIO_PinAFConfig(GPIOD,GPIO_PinSource6,GPIO_AF_USART2);
 
 USART_ClockInit(USART2,&USART_ClockInitStruct);
 
 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;
 USART_Init(USART2,&USART_InitStructure);
 
 USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);        //接收中断使能
 USART_ClearITPendingBit(USART2, USART_IT_TC);//清除中断TC位
 USART_Cmd(USART2,ENABLE);//最后使能串口
 
 
 ///复位串口3
 USART_DeInit(USART3);
 
 USART_StructInit(&USART_InitStructure);//载入默认USART参数
 USART_ClockStructInit(&USART_ClockInitStruct);//载入默认USART参数
 //配置串口3的管脚 PB10 USART3_TX PB11 USART3_RX
 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;    //复用
 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
 GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; //推挽输出
 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
 GPIO_Init(GPIOB, &GPIO_InitStructure);
 GPIO_PinAFConfig(GPIOC,GPIO_PinSource10,GPIO_AF_USART3);        //管脚PD5复用为USART2
 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
 GPIO_Init(GPIOB, &GPIO_InitStructure);
 GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_USART3);
 
 USART_ClockInit(USART3,&USART_ClockInitStruct);
 
 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_RTS;
 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
 USART_Init(USART3,&USART_InitStructure);
 
 USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);        //接收中断使能
 USART_ClearITPendingBit(USART3, USART_IT_TC);//清除中断TC位
 USART_Cmd(USART3,ENABLE);//最后使能串口
 }
 
 void USART3_IRQHandler(void)
 {
 if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
 {
 UART3_Rbuff[UART3_rec_counter] = USART3->DR;//
 UART3_rec_counter ++;
 
 g_Uart3_Timer=1;
 if(UART3_rec_counter > UART3_REC_BUFF_SIZE)//超过接收缓冲区大小
 {
 UART3_rec_counter = 0;
 }
 USART_ClearITPendingBit(USART3, USART_IT_RXNE);
 }
 if (USART_GetITStatus(USART3, USART_IT_TXE) != RESET)
 {
 USART_ClearITPendingBit(USART3, USART_IT_TXE);           /* Clear the USART transmit interrupt                  */
 }
 }
 
 void UART3_Send_Data(unsigned char *send_buff,unsigned int length)
 {
 unsigned int i = 0;
 for(i = 0;i < length;i ++)
 {
 USART3->DR = send_buff[i];
 while((USART3->SR&0X40)==0);
 }
 }
 
 
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