不知道楼之调试成功没有，下面是我自己的代码，调试是成功的，仅供参考！ void MYUSART3_init(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; /* Enable GPIO clock */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE); //PC10-TX C11-RX /* Enable UART clock */ RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE); /* Connect PXx to USARTx_Tx */ GPIO_PinAFConfig(GPIOC,GPIO_PinSource10,GPIO_AF_USART3); /* Connect PXx to USARTx_Rx */ GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_USART3); /* Configure USART Tx as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_40MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP; GPIO_Init(GPIOC, &GPIO_InitStructure); /* Configure USART Rx as alternate function push-pull */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11; GPIO_Init(GPIOC, &GPIO_InitStructure); /* Enable the USARTx Interrupt */ NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure); USART_InitStructure.USART_BaudRate = 57600; USART_InitStructure.USART_WordLength = USART_WordLength_8b; USART_InitStructure.USART_StopBits = USART_StopBits_2; 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 configuration */ USART_Init(USART3,&USART_InitStructure); /* Enable USART */ USART_Cmd(USART3, ENABLE); USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);
