STM32串口配置的一种方法

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);}