STM32F07xx单片机串口4配置

    GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDef USART_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;

    USART_ClockInitTypeDef USART_ClockInitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC,ENABLE); 

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART4,ENABLE);

//端口重映射

GPIO_PinAFConfig(GPIOC, GPIO_PinSource10, GPIO_AF_4); //TX

GPIO_PinAFConfig(GPIOC, GPIO_PinSource11, GPIO_AF_4);  //RX

//初始化管脚

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10 | GPIO_Pin_11;

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;

  GPIO_Init(GPIOC, &GPIO_InitStructure);  

  RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART4, ENABLE);

  RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART4, DISABLE);

USART_InitStructure.USART_BaudRate = 115200;

USART_InitStructure.USART_WordLength = USART_WordLength_8b;

USART_InitStructure.USART_StopBits = USART_StopBits_1; //1个停止位

USART_InitStructure.USART_Parity = USART_Parity_No; //校验位

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;

USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;

USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;

USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;

USART_ClockInit(USART4, &USART_ClockInitStructure);

USART_Init(USART4, &USART_InitStructure);

//Enable usart4 receive interrupt

USART_ITConfig(USART4, USART_IT_RXNE, ENABLE);

// Enable the USARTx 

USART_Cmd(USART4, ENABLE);