帮我写一个stm32f10串口2dma接收数据代码示例包括处理数据完整性和错误检测的完整代码

以下是一个基本的stm32f10串口2dma接收数据的代码示例，包括处理数据完整性和错误检测的完整代码：

#include "stm32f10x.h"

#define BUFFER_SIZE 256

uint8_t rx_buffer[BUFFER_SIZE];
uint16_t rx_index = 0;
uint8_t rx_complete = 0;

void USART2_IRQHandler(void)
{
    if (USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)
    {
        rx_buffer[rx_index++] = USART_ReceiveData(USART2);
        if (rx_index >= BUFFER_SIZE)
        {
            rx_index = 0;
        }
    }
}

void DMA1_Channel6_IRQHandler(void)
{
    if (DMA_GetITStatus(DMA1_IT_TC6) != RESET)
    {
        DMA_ClearITPendingBit(DMA1_IT_TC6);
        rx_complete = 1;
    }
}

int main(void)
{
    USART_InitTypeDef USART_InitStructure;
    DMA_InitTypeDef DMA_InitStructure;
    NVIC_InitTypeDef NVIC_InitStructure;

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    GPIO_InitTypeDef GPIO_InitStructure;
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    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_3;
    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(USART2, &USART_InitStructure);

    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&USART2->DR;
    DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)rx_buffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = BUFFER_SIZE;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
    DMA_Init(DMA1_Channel6, &DMA_InitStructure);

    DMA_ITConfig(DMA1_Channel6, DMA_IT_TC, ENABLE);

    NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel6_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);

    USART_Cmd(USART2, ENABLE);
    DMA_Cmd(DMA1_Channel6, ENABLE);

    while (1)
    {
        if (rx_complete)
        {
            // 处理接收到的数据
            // ...

            // 处理完毕后清空接收缓冲区
            rx_index = 0;
            rx_complete = 0;
        }
    }
}

在这个示例中，我们使用了USART2和DMA1的通道6来实现串口数据的接收。当USART2接收到数据时，会触发USART2_IRQHandler中断，将数据存储到rx_buffer中。当DMA1_Channel6传输完成时，会触发DMA1_Channel6_IRQHandler中断，设置rx_complete标志位，表示接收完成。

在主循环中，我们检查rx_complete标志位，如果接收完成，则处理接收到的数据，并清空接收缓冲区。这里的数据处理包括处理数据完整性和错误检测等操作，具体实现根据具体需求而定。

需要注意的是，在实际应用中，我们可能需要对接收到的数据进行一些预处理，比如去除无用的字符、转换编码格式等操作。此外，我们还需要考虑数据的安全性和可靠性，比如加密、校验和等操作。