DMA ADC采样报错TEIF0

TEIF0是STM32中DMA传输错误中断标志位之一。在ADC采样过程中，如果DMA传输出现错误，会导致TE0标志位置位。这可能是于DMA配置错误、数据缓冲区溢出其他硬件问题引起的。

要解决这个问题，可以尝试以下几个步骤：

1. 检查DMA配置：确保DMA通道和流的配置正确，包括源地址、目的地址和传输大小等参数。

2. 检查数据缓冲区大小：确保DMA传输的数据缓冲区足够大，以容纳ADC采样数据。

3. 检查硬件连接：确保ADC和DMA之间的连接正确并可靠，避免干扰或信号损坏。

4. 检查中断处理：在DMA传输错误中断处理函数中，可以打印相关信息或采取其他适当的措施来处理错误情况。

如果以上步骤都没有解决问题，可以尝试参考STM32的官方文档、论坛或联系技术支持获取更详细的帮助。

相关问题

串口空闲中断 +DMA中断接收

串口空闲中断和DMA中断接收是两种不同的接收方式。

串口空闲中断接收是指当串口接收到数据后，数据传输完成并且串口空闲时，触发中断来进行数据处理。这种方式比较简单，适用于数据量较小的情况。

DMA中断接收是指使用DMA控制器来进行数据传输，当DMA传输完成后触发中断进行数据处理。这种方式适用于数据量较大的情况，可以提高数据传输的效率。

下面是一个基于STM32的串口空闲中断+DMA中断接收的例子：

#include "stm32f4xx.h"
#include "stm32f4xx_conf.h"

#define USARTx USART2
#define DMAx DMA1
#define DMAx_Streamx DMA1_Stream5
#define DMAx_Streamx_IRQn DMA1_Stream5_IRQn
#define DMAx_Streamx_IRQHandler DMA1_Stream5_IRQHandler

#define BUFFER_SIZE 1024

uint8_t buffer[BUFFER_SIZE];
volatile uint16_t bufferIndex = 0;

void initUSART()
{
    USART_InitTypeDef USART_InitStruct;
    GPIO_InitTypeDef GPIO_InitStruct;
    NVIC_InitTypeDef NVIC_InitStruct;
    DMA_InitTypeDef DMA_InitStruct;

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);

    GPIO_InitStruct.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3;
    GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
    GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
    GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
    GPIO_Init(GPIOA, &GPIO_InitStruct);

    GPIO_PinAFConfig(GPIOA, GPIO_PinSource2, GPIO_AF_USART2);
    GPIO_PinAFConfig(GPIOA, GPIO_PinSource3, GPIO_AF_USART2);

    USART_InitStruct.USART_BaudRate = 115200;
    USART_InitStruct.USART_WordLength = USART_WordLength_8b;
    USART_InitStruct.USART_StopBits = USART_StopBits_1;
    USART_InitStruct.USART_Parity = USART_Parity_No;
    USART_InitStruct.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStruct.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
    USART_Init(USARTx, &USART_InitStruct);

    USART_ITConfig(USARTx, USART_IT_IDLE, ENABLE);

    DMA_InitStruct.DMA_Channel = DMA_Channel_4;
    DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralToMemory;
    DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t)buffer;
    DMA_InitStruct.DMA_BufferSize = BUFFER_SIZE;
    DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)&USARTx->DR;
    DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
    DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
    DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;
    DMA_InitStruct.DMA_Priority = DMA_Priority_Medium;
    DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Disable;
    DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
    DMA_Init(DMAx_Streamx, &DMA_InitStruct);

    NVIC_InitStruct.NVIC_IRQChannel = DMAx_Streamx_IRQn;
    NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0;
    NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStruct);

    USART_Cmd(USARTx, ENABLE);
    DMA_Cmd(DMAx_Streamx, ENABLE);
}

void DMAx_Streamx_IRQHandler()
{
    if (DMA_GetITStatus(DMAx_Streamx, DMA_IT_TCIF5) != RESET)
    {
        DMA_ClearITPendingBit(DMAx_Streamx, DMA_IT_TCIF5);
        DMA_Cmd(DMAx_Streamx, DISABLE);
        bufferIndex = BUFFER_SIZE - DMA_GetCurrDataCounter(DMAx_Streamx);
    }
}

void USART2_IRQHandler()
{
    if (USART_GetITStatus(USART2, USART_IT_IDLE) != RESET)
    {
        USART_ClearITPendingBit(USART2, USART_IT_IDLE);
        DMAx_Streamx->CR &= ~(1 << 0); // Disable DMA Stream
        DMA_ClearFlag(DMAx_Streamx, DMA_FLAG_TCIF5 | DMA_FLAG_HTIF5 | DMA_FLAG_TEIF5 | DMA_FLAG_DMEIF5 | DMA_FLAG_FEIF5);
        DMA_Cmd(DMAx_Streamx, ENABLE);
    }
}

int main()
{
    initUSART();

    while (1)
    {
        if (bufferIndex > 0)
        {
            // 处理接收到的数据
            bufferIndex = 0;
        }
    }
}

该例子中使用DMA控制器进行数据传输，并通过串口空闲中断触发DMA传输完成中断。在DMA传输完成中断中，通过DMA_GetCurrDataCounter函数获取当前未传输的数据长度，即接收到的数据长度。在串口空闲中断中，通过禁用并重新启用DMA Stream来触发DMA传输完成中断。

stm32f427串口3DMA接收 代码

以下是基于STM32F427的USART+DMA轮询接收程序，直接存储器访问 (DMA) 的串口3DMA接收代码：

#include "stm32f4xx.h"
#include "usart.h"
#include "dma.h"

#define USART_RX_DMA_STREAM              DMA1_Stream1
#define USART_RX_DMA_CHANNEL             DMA_Channel_4
#define USART_RX_DMA_IRQ                 DMA1_Stream1_IRQn
#define USART_RX_DMA_FLAG_TC             DMA_FLAG_TCIF1
#define USART_RX_DMA_FLAG_HT             DMA_FLAG_HTIF1
#define USART_RX_DMA_FLAG_FE             DMA_FLAG_FEIF1
#define USART_RX_DMA_FLAG_TE             DMA_FLAG_TEIF1
#define USART_RX_DMA_FLAG_DME            DMA_FLAG_DMEIF1

#define USART_RX_DMA_BUF_SIZE            1024

uint8_t usart_rx_dma_buf[USART_RX_DMA_BUF_SIZE];

void USART3_DMA_Init(void)
{
    DMA_InitTypeDef DMA_InitStructure;

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);

    DMA_DeInit(USART_RX_DMA_STREAM);

    DMA_InitStructure.DMA_Channel = USART_RX_DMA_CHANNEL;
    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&USART3->DR;
    DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)usart_rx_dma_buf;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
    DMA_InitStructure.DMA_BufferSize = USART_RX_DMA_BUF_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_FIFOMode = DMA_FIFOMode_Disable;
    DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
    DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
    DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
    DMA_Init(USART_RX_DMA_STREAM, &DMA_InitStructure);

    DMA_Cmd(USART_RX_DMA_STREAM, ENABLE);

    USART_DMACmd(USART3, USART_DMAReq_Rx, ENABLE);
}

void USART3_DMA_IRQHandler(void)
{
    if (DMA_GetFlagStatus(USART_RX_DMA_STREAM, USART_RX_DMA_FLAG_TC) != RESET)
    {
        DMA_ClearFlag(USART_RX_DMA_STREAM, USART_RX_DMA_FLAG_TC);
    }

    if (DMA_GetFlagStatus(USART_RX_DMA_STREAM, USART_RX_DMA_FLAG_HT) != RESET)
    {
        DMA_ClearFlag(USART_RX_DMA_STREAM, USART_RX_DMA_FLAG_HT);
    }

    if (DMA_GetFlagStatus(USART_RX_DMA_STREAM, USART_RX_DMA_FLAG_FE) != RESET)
    {
        DMA_ClearFlag(USART_RX_DMA_STREAM, USART_RX_DMA_FLAG_FE);
    }

    if (DMA_GetFlagStatus(USART_RX_DMA_STREAM, USART_RX_DMA_FLAG_TE) != RESET)
    {
        DMA_ClearFlag(USART_RX_DMA_STREAM, USART_RX_DMA_FLAG_TE);
    }

    if (DMA_GetFlagStatus(USART_RX_DMA_STREAM, USART_RX_DMA_FLAG_DME) != RESET)
    {
        DMA_ClearFlag(USART_RX_DMA_STREAM, USART_RX_DMA_FLAG_DME);
    }
}

int main(void)
{
    USART3_Configuration();
    USART3_DMA_Init();

    while (1)
    {
        // do something
    }
}