stm32f407串口1官方库代码

以下是使用STM32F407串口1的官方库代码示例：

#include "stm32f4xx.h"

void USART_Config(void)
{
    GPIO_InitTypeDef GPIO_InitStruct;
    USART_InitTypeDef USART_InitStruct;
    NVIC_InitTypeDef NVIC_InitStruct;

    // Enable clock for GPIOA and USART1
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

    /* GPIO init */
    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStruct);

    // Connect PA9 to USART1_Tx
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_USART1);

    // Connect PA10 to USART1_Rx
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_USART1);

    /* USART init */
    USART_InitStruct.USART_BaudRate = 115200;
    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStruct.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
    USART_InitStruct.USART_Parity = USART_Parity_No;
    USART_InitStruct.USART_StopBits = USART_StopBits_1;
    USART_InitStruct.USART_WordLength = USART_WordLength_8b;
    USART_Init(USART1, &USART_InitStruct);

    // Enable USART1 global interrupt
    NVIC_InitStruct.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);

    // Enable RX interrupt
    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

    // Enable USART1
    USART_Cmd(USART1, ENABLE);
}

void USART1_IRQHandler(void)
{
    if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)
    {
        // Read received byte
        uint16_t receivedByte = USART_ReceiveData(USART1);

        // Do something with received byte

        // Clear interrupt flag
        USART_ClearITPendingBit(USART1, USART_IT_RXNE);
    }
}

int main(void)
{
    USART_Config();

    while(1)
    {
        // Do something else
    }
}

这个示例代码使用的是USART1，配置为115200波特率，8位数据位，无校验位，1个停止位。你需要根据实际需求修改这些参数。在主循环中，你可以添加其他需要执行的代码。