1，初始化代碼
ADC_InitTypeDef?ADC_InitStructure?=?{?0?};
	GPIO_InitTypeDef?GPIO_InitStructure?=?{?0?};
	DMA_InitTypeDef?DMA_InitStructure?=?{?0?};
	NVIC_InitTypeDef?NVIC_InitStructure?=?{?0?};

	RCC_APB2PeriphClockCmd?(?RCC_APB2Periph_GPIOA,?ENABLE?);
	RCC_APB2PeriphClockCmd?(?RCC_APB2Periph_ADC1,?ENABLE?);
	RCC_AHBPeriphClockCmd?(?RCC_AHBPeriph_DMA1,?ENABLE?);
	RCC_ADCCLKConfig?(?RCC_PCLK2_Div8?);

	GPIO_InitStructure.GPIO_Pin?=?GPIO_Pin_3?|?GPIO_Pin_6;
	GPIO_InitStructure.GPIO_Mode?=?GPIO_Mode_AIN;
	GPIO_Init?(?GPIOA,?&GPIO_InitStructure?);

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

	ADC_RegularChannelConfig?(?ADC1,?ADC_Channel_3,?1,?ADC_SampleTime_239Cycles5?);
	ADC_RegularChannelConfig?(?ADC1,?ADC_Channel_6,?2,?ADC_SampleTime_239Cycles5?);

	ADC_Cmd?(?ADC1,?ENABLE?);

	ADC_BufferCmd?(?ADC1,?DISABLE?);?//?disable?buffer
	ADC_ResetCalibration?(?ADC1?);
	while?(ADC_GetResetCalibrationStatus(ADC1))
	;
	ADC_StartCalibration?(?ADC1?);
	while?(ADC_GetCalibrationStatus(ADC1))
	;
	Calibrattion_Val?=?Get_CalibrationValue?(?ADC1?);

	DMA_DeInit?(?DMA1_Channel1?);
	DMA_InitStructure.DMA_PeripheralBaseAddr?=?(u32)?&ADC1->RDATAR;
	DMA_InitStructure.DMA_MemoryBaseAddr?=?(u32)?adc_dma_buf;
	DMA_InitStructure.DMA_DIR?=?DMA_DIR_PeripheralSRC;
	DMA_InitStructure.DMA_BufferSize?=?ADC_DMA_BUF_SIZE?*?PD_CHANNEL_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_VeryHigh;
	DMA_InitStructure.DMA_M2M?=?DMA_M2M_Disable;
	DMA_Init?(?DMA1_Channel1,?&DMA_InitStructure?);

	DMA_ITConfig?(?DMA1_Channel1,?DMA_IT_TC,?ENABLE?);

	NVIC_InitStructure.NVIC_IRQChannel?=?DMA1_Channel1_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority?=?4;
	NVIC_InitStructure.NVIC_IRQChannelCmd?=?ENABLE;
	NVIC_Init?(?&NVIC_InitStructure?);

2，數(shù)據(jù)采集夠之后，在

DMA1_Channel1_IRQHandler

中，停止采集：

DMA_Cmd?(?DMA1_Channel1,?DISABLE?);
		ADC_DMACmd?(?ADC1,?DISABLE?);
		DMA1_Channel1->CNTR?=?0;
		ADC_SoftwareStartConvCmd?(?ADC1,?DISABLE?);

3，啟動采集

DMA_Cmd?(?DMA1_Channel1,?DISABLE?);

	DMA1_Channel1->CNTR?=?user_curve_avg_size?*?2;
	DMA_Cmd?(?DMA1_Channel1,?ENABLE?);
	ADC_DMACmd?(?ADC1,?ENABLE?);
	ADC_SoftwareStartConvCmd?(?ADC1,?ENABLE?);

問題，緩沖區(qū)是一個

adc_dma_buf[cnt][2]
就是兩個通道交替保存采集的數(shù)據(jù)，多次啟動-停止會發(fā)現(xiàn)有時候一通道的值會和二通道的值交換位置

在中斷中增加一句“ADC_Cmd(ADC1, DIABLE);”即可，因為雖然你把DMA關(guān)閉了，但是你的ADC是循環(huán)轉(zhuǎn)換的，實際上ADC還是在不停的采樣數(shù)據(jù)，所以重新開啟傳輸?shù)臅r候有幾率出現(xiàn)數(shù)據(jù)錯位的情況。

感謝，按照你的方法確實解決了問題，順便請教下你，有沒有濾波器相關(guān)的，我這邊需要低通濾波器，已經(jīng)用matlab把系數(shù)搞出來了

您好，目前沒有濾波器相關(guān)例程