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- <div class="blockcode"><blockquote>// ADC DMA初始化
- void ADC_Configuration(void)
- {
- ADC_InitTypeDef ADC_InitStructure;
- DMA_InitTypeDef DMA_InitStructure;
- GPIO_InitTypeDef GPIO_InitStructure;
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_ADC1,ENABLE);
- RCC_ADCCLKConfig(RCC_PCLK2_Div6); //72MHz 6·ÖƵ 72M/6=12M ADCÖÜÆÚ
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_2;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- DMA_DeInit(DMA1_Channel1);
- DMA_InitStructure.DMA_BufferSize = 6;
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
- DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
- DMA_InitStructure.DMA_MemoryBaseAddr = (u32)ADC_ConvertedValue;
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
- DMA_InitStructure.DMA_MemoryInc=DMA_MemoryInc_Enable;
- DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
- DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)(&ADC1->DR);
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
- DMA_InitStructure.DMA_PeripheralInc=DMA_PeripheralInc_Disable;
- DMA_InitStructure.DMA_Priority=DMA_Priority_High;
- DMA_Init(DMA1_Channel1,&DMA_InitStructure);
- DMA_Cmd(DMA1_Channel1, ENABLE);
- 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_T2_CC2;
- ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
- ADC_InitStructure.ADC_NbrOfChannel = 2;
- ADC_Init(ADC1, &ADC_InitStructure);
- ADC_RegularChannelConfig(ADC1,ADC_Channel_0,1, ADC_SampleTime_239Cycles5 );
- ADC_RegularChannelConfig(ADC1,ADC_Channel_2,1, ADC_SampleTime_239Cycles5 );
- ADC_ExternalTrigConvCmd(ADC1,ENABLE);
- ADC_Cmd(ADC1, ENABLE);
- ADC_DMACmd(ADC1,ENABLE);
-
- ADC_ResetCalibration(ADC1);
- while(ADC_GetResetCalibrationStatus(ADC1));
- ADC_StartCalibration(ADC1);
- while(ADC_GetCalibrationStatus(ADC1));
- }
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