STM32一个函数配置所有串口的方法

• code example:

/**
 * config usartx
 * @param USARTx   [USART lable, example: USART1, USART2, USART3]
 * @param baudRate [usart baudRate]
 */
void Usart_InitConfig(USART_TypeDef* USARTx, uint32_t baudRate)
{
    GPIO_InitTypeDef GPIO_InitStruction;
    USART_InitTypeDef Usartx_InitStruction;
    NVIC_InitTypeDef  NVIC_InitStruction;

    if(USARTx == USART1)
    {
        /******************** usart1 *************************************/
        /************** set usart1 parameter **********************/
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); 
        /************************* usart1 GPIO config ***********************/
        GPIO_InitStruction.GPIO_Pin = GPIO_Pin_9;
        GPIO_InitStruction.GPIO_Mode = GPIO_Mode_AF_PP;
        GPIO_InitStruction.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOA, &GPIO_InitStruction);

        GPIO_InitStruction.GPIO_Pin = GPIO_Pin_10;
        GPIO_InitStruction.GPIO_Mode = GPIO_Mode_IN_FLOATING;
        GPIO_InitStruction.GPIO_Speed = GPIO_Speed_50MHz;    
        GPIO_Init(GPIOA, &GPIO_InitStruction);

        RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);  // usart1 clock    
        Usartx_InitStruction.USART_BaudRate = baudRate;
        Usartx_InitStruction.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
        Usartx_InitStruction.USART_WordLength = USART_WordLength_8b;
        Usartx_InitStruction.USART_StopBits = USART_StopBits_1;
        Usartx_InitStruction.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
        Usartx_InitStruction.USART_Parity = USART_Parity_No;

        USART_Init(USART1, &Usartx_InitStruction);

        /************** set usart1 NVIC ***************************/    
        NVIC_InitStruction.NVIC_IRQChannel = USART1_IRQn;
        NVIC_InitStruction.NVIC_IRQChannelPreemptionPriority = 2;
        NVIC_InitStruction.NVIC_IRQChannelSubPriority = 0;
        NVIC_InitStruction.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStruction);   
        USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);  //set usart1 interrupt type
        USART_Cmd(USART1, ENABLE);
    }
    else if(USARTx == USART2) 
    {
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE); 
        /************************* usart2 ***********************/
        GPIO_InitStruction.GPIO_Pin = GPIO_Pin_2;
        GPIO_InitStruction.GPIO_Mode = GPIO_Mode_AF_PP;
        GPIO_InitStruction.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOA, &GPIO_InitStruction);

        GPIO_InitStruction.GPIO_Pin = GPIO_Pin_3;
        GPIO_InitStruction.GPIO_Mode = GPIO_Mode_IN_FLOATING;
        GPIO_InitStruction.GPIO_Speed = GPIO_Speed_50MHz;    
        GPIO_Init(GPIOA, &GPIO_InitStruction);  

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);  // usart2 clock
        Usartx_InitStruction.USART_BaudRate = baudRate;
        Usartx_InitStruction.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
        Usartx_InitStruction.USART_WordLength = USART_WordLength_8b;
        Usartx_InitStruction.USART_StopBits = USART_StopBits_1;
        Usartx_InitStruction.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
        Usartx_InitStruction.USART_Parity = USART_Parity_No;
        USART_Init(USART2, &Usartx_InitStruction);

        /************** set usart2 NVIC ***************************/ 
        NVIC_InitStruction.NVIC_IRQChannel = USART2_IRQn;
        NVIC_InitStruction.NVIC_IRQChannelPreemptionPriority = 2;
        NVIC_InitStruction.NVIC_IRQChannelSubPriority = 1;
        NVIC_InitStruction.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStruction);
        USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);  //set usart2 interrupt type
        USART_Cmd(USART2, ENABLE);
    }
    else if(USARTx == USART3)
    {
        /************************* usart3 ***********************/
        GPIO_InitStruction.GPIO_Pin = GPIO_Pin_10;
        GPIO_InitStruction.GPIO_Mode = GPIO_Mode_AF_PP;
        GPIO_InitStruction.GPIO_Speed = GPIO_Speed_50MHz;
        GPIO_Init(GPIOB, &GPIO_InitStruction);
        
        GPIO_InitStruction.GPIO_Pin = GPIO_Pin_11;
        GPIO_InitStruction.GPIO_Mode = GPIO_Mode_IN_FLOATING;
        GPIO_InitStruction.GPIO_Speed = GPIO_Speed_50MHz;    
        GPIO_Init(GPIOB, &GPIO_InitStruction);  
        RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);  // usart3 clock
        Usartx_InitStruction.USART_BaudRate = baudRate;
        Usartx_InitStruction.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
        Usartx_InitStruction.USART_WordLength = USART_WordLength_8b;
        Usartx_InitStruction.USART_StopBits = USART_StopBits_1;
        Usartx_InitStruction.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
        Usartx_InitStruction.USART_Parity = USART_Parity_No;
        USART_Init(USART3, &Usartx_InitStruction); 

        /************** set usart3 NVIC ***************************/    
        NVIC_InitStruction.NVIC_IRQChannel = USART3_IRQn;
        NVIC_InitStruction.NVIC_IRQChannelPreemptionPriority = 2;
        NVIC_InitStruction.NVIC_IRQChannelSubPriority = 2;
        NVIC_InitStruction.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStruction);

        USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);  //set usart3 interrupt type
        USART_Cmd(USART3, ENABLE);
    } 
    
/**************************** usartbuff struct init**************************/
    memset(UsartBuff.UsartRecBuff, '\0', BUFF_SIZE);
    memset(UsartBuff.UsartSendBuff, '\0', BUFF_SIZE);
}