stm32 dma adc高速采集 标准库

以下是STM32 DMA ADC高速采集的标准库代码实现：

1. 初始化ADC和DMA

// 初始化ADC
ADC_InitTypeDef ADC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);

// 配置ADC通道
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_41Cycles5);

// 初始化DMA
DMA_InitTypeDef DMA_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(ADC1->DR);
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&g_ADCValue[0];
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = ADC_BUFFER_SIZE;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);

// 开启DMA
DMA_Cmd(DMA1_Channel1, ENABLE);

// 开启ADC DMA请求
ADC_DMACmd(ADC1, ENABLE);

2. 启动ADC转换

// 启动ADC转换
ADC_SoftwareStartConvCmd(ADC1, ENABLE);

3. 在中断处理程序中读取ADC值

void DMA1_Channel1_IRQHandler(void)
{
    if (DMA_GetITStatus(DMA1_IT_TC1) != RESET)
    {
        DMA_ClearITPendingBit(DMA1_IT_TC1);
        for (int i = 0; i < ADC_BUFFER_SIZE; i++)
        {
            // 读取ADC值
            uint16_t value = g_ADCValue[i];
            // 处理ADC值
            // ...
        }
    }
}

注意事项：

- ADC_BUFFER_SIZE是要采集的数据个数，建议不要太大，否则会影响响应速度。
- 在中断处理程序中处理完数据后，要记得清除中断标志位，否则会一直触发中断。