MM32F0010A1T的串口2接收处理函数

MM32F0010A1T的串口2接收处理函数可以通过以下代码实现：

#include "stdio.h"
#include "MM32F0010.h"

#define UART2_RX_BUF_SIZE 64

uint8_t UART2_RX_BUF[UART2_RX_BUF_SIZE];
uint8_t UART2_RX_STA = 0;

void UART2_IRQHandler(void)
{
    if (USART_GetITStatus(UART2, USART_IT_RXNE) != RESET)
    {
        uint8_t res = USART_ReceiveData(UART2);
        if ((UART2_RX_STA & 0x80) == 0)
        {
            if (UART2_RX_STA < UART2_RX_BUF_SIZE)
            {
                UART2_RX_BUF[UART2_RX_STA++] = res;
            }
            else
            {
                UART2_RX_STA |= 0x80;
                UART2_RX_STA = 0;
            }
        }
    }
}

int fputc(int ch, FILE *f)
{
    USART_SendData(UART2, (uint8_t)ch);
    while (USART_GetFlagStatus(UART2, USART_FLAG_TXE) == RESET)
        ;
    return ch;
}

int main(void)
{
    USART_InitTypeDef USART_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;
    GPIO_InitTypeDef GPIO_InitStructure;

    RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART2, ENABLE);
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

    GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_1);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_1);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
    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(UART2, &USART_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = UART2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_ITConfig(UART2, USART_IT_RXNE, ENABLE);

    USART_Cmd(UART2, ENABLE);

    while (1)
    {
        if ((UART2_RX_STA & 0x80) == 0x80)
        {
            printf("UART2_RX_BUF overflow\r\n");
            UART2_RX_STA = 0;
        }
        if (UART2_RX_STA & 0x40)
        {
            printf("UART2_RX_BUF:\r\n");
            for (int i = 0; i < UART2_RX_STA & 0x3f; i++)
            {
                printf("%c", UART2_RX_BUF[i]);
            }
            printf("\r\n");
            UART2_RX_STA = 0;
        }
    }
}