void ADC1_CH6_DMA_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
DMA_InitTypeDef DMA_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2 | RCC_AHB1Periph_GPIOA, ENABLE);//???????é?±??
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);//???????é?±??
// DMA_DeInit(DMA2_Stream0);
/* DMA2 Stream0 channe0 configuration **************************************/
DMA_InitStructure.DMA_Channel = DMA_Channel_0; //???¨?¨?????????¨???????÷
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_Address; //???¨???è???·??????
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC_ConvertedValue; //???¨???????·
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;//???¨?????????è??????
DMA_InitStructure.DMA_BufferSize = 2;//???¨DMA?????÷???ó??
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;// ???¨???§?????÷???·????????????
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//???????·??????????
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//???¨???§???????í??
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//???¨???????????????í??
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//?¤×÷???????è??,?¤×÷?????·????
DMA_InitStructure.DMA_Priority = DMA_Priority_High;//dma?¨??????????????
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; //???¨????fifo??????????????,fifo ???????¨????????????
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;//???¨fifo??·§????
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; //?è??????·?????
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA2_Stream0, &DMA_InitStructure);
DMA_Cmd(DMA2_Stream0, ENABLE);
/* Configure ADC1 Channel6 pin as analog input ******************************/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;//gpio???è????????°??????è????6.7?è????????????
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* ADC Common Init **********************************************************/
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent; //????????????
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2; //???ù????
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled; //????DMA
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;//adc?????????±
ADC_CommonInit(&ADC_CommonInitStructure); //?ù??adc???è?¨??
/* ADC1 Init ****************************************************************/
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;//?è????12??????
ADC_InitStructure.ADC_ScanConvMode = ENABLE;//???í???????????¨?è????
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//???í???????ù?????¨???????ù?????©
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;//?¨?????í????·?
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//??????????????????
ADC_InitStructure.ADC_NbrOfConversion = 2;//?è?????????ò×?????adc?¨????????2
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channe6 configuration *************************************/
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 1, ADC_SampleTime_3Cycles);
//?è?????¨??adc???ò×é???¨?????è????????×??????ò?????ù?±??
/*
*ADCx:???¨???ù??adc?¨??
*ADC_Channel?????¨???????¨????????
*Rank?????¨?????????ò1-16
*ADC_SampleTime_3Cycles?????¨?????±??
*/
ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 2, ADC_SampleTime_3Cycles);
/* Enable DMA request after last transfer (Single-ADC mode) */
ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);//?????ò??????DMA??×???????
/* Enable ADC3 DMA */
ADC_DMACmd(ADC1, ENABLE);//?????ò????????dma
/* Enable ADC3 */
ADC_Cmd(ADC1, ENABLE);//????dma
}
双通道adc采集
