写一个STM32F103的UART中断接收

好的，下面就是一个基本的STM32F103的UART中断接收的代码示例：

#include "stm32f10x.h"

#define BUFFER_SIZE 64

volatile uint8_t rx_buffer[BUFFER_SIZE];
volatile uint8_t rx_head = 0;
volatile uint8_t rx_tail = 0;

void USART1_IRQHandler(void) {
    if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) {
        rx_buffer[rx_head++] = USART_ReceiveData(USART1);
        if (rx_head >= BUFFER_SIZE) {
            rx_head = 0;
        }
    }
}

int main(void) {
    // 初始化GPIO和USART
    GPIO_InitTypeDef GPIO_InitStructure;
    USART_InitTypeDef USART_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_USART1, ENABLE);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &GPIO_InitStructure);

    USART_InitStructure.USART_BaudRate = 115200;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    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_Init(USART1, &USART_InitStructure);

    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

    NVIC_InitTypeDef NVIC_InitStructure;
    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_Cmd(USART1, ENABLE);

    while (1) {
        if (rx_head != rx_tail) {
            // 有数据接收
            uint8_t data = rx_buffer[rx_tail++];
            if (rx_tail >= BUFFER_SIZE) {
                rx_tail = 0;
            }
            // 处理接收到的数据
        }
    }
}

上面的代码中，我们使用USART1来进行UART通信，同时开启了接收中断，并在中断处理函数中将接收到的数据存入了一个循环队列中。在主程序中，我们不断检查循环队列中是否有新的数据，并进行相应的处理。