stm32407，ADC采集数据10秒DMA搬运数据存到flash里面，在从flash里面读出数据通过DAC输出出来

好的，这个问题主要涉及到STM32F407芯片的ADC、DMA、FLASH和DAC模块的使用。下面我来简单介绍一下这些模块的使用方法。

首先，需要初始化ADC模块，并设置采样时间、采样通道等参数。

然后，需要初始化DMA模块，并设置传输方向、传输大小等参数。在采集数据时，通过DMA自动搬运数据到指定的内存地址中。

接着，需要初始化FLASH模块，并设置写保护、擦除等参数。在采集完数据后，将数据存储到FLASH中。

最后，需要初始化DAC模块，并设置输出通道、输出电压等参数。在从FLASH中读出数据后，通过DAC模块将数据输出。

具体的代码实现可以参考以下步骤：

1. 初始化ADC模块

ADC_InitTypeDef ADC_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);

/* Configure the ADC1 in continuous mode */
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Backward;
ADC_Init(ADC1, &ADC_InitStructure);

/* Configure the ADC1 channel */
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_28Cycles);

2. 初始化DMA模块

DMA_InitTypeDef DMA_InitStructure;

/* Enable DMA1 clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);

/* Configure DMA1 Stream0 channel0 */
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) & (ADC1->DR);
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&g_ADCValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = ADC_SAMPLE_NUM;
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_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(DMA2_Stream0, &DMA_InitStructure);

DMA_Cmd(DMA2_Stream0, ENABLE);

3. 初始化FLASH模块

FLASH_Unlock();
FLASH_ClearFlag(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR | FLASH_FLAG_PGSERR);

FLASH_EraseSector(FLASH_Sector_7, VoltageRange_3);

for (i = 0; i < ADC_SAMPLE_NUM; i++)
{
    FLASH_ProgramHalfWord(FLASH_SECTOR7_BASE_ADDRESS + i * 2, g_ADCValue[i]);
}

4. 初始化DAC模块

DAC_InitTypeDef DAC_InitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);

/* Configure and enable DAC channel1 */
DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;
DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Enable;
DAC_Init(DAC_Channel_1, &DAC_InitStructure);
DAC_Cmd(DAC_Channel_1, ENABLE);

5. 从FLASH中读出数据并输出

for (i = 0; i < ADC_SAMPLE_NUM; i++)
{
    uint16_t value = *(uint16_t*)(FLASH_SECTOR7_BASE_ADDRESS + i * 2);
    DAC_SetChannel1Data(DAC_Align_12b_R, value);
}

希望这些代码能够帮助你完成你的任务。