求问,STM32L151RDT6多通道采用的是ADC+DMA方式,但是驱动不起来是什么原因?
2019-07-14 18:17发布
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以下为具体程序代码,求大神解答
- void AD_Configuration(void)
- {
- DMA_InitTypeDef DMA_InitStructure;
- GPIO_InitTypeDef GPIO_InitStructure;
- ADC_InitTypeDef ADC_InitStructure;
-
- /*Enable DMA1 Clock*/
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
- /*DMA1 Channel1 Configuration*/
- DMA_DeInit(DMA1_Channel1);
- DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_ADDRESS;
- DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADC_ConvertedValue;
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
- DMA_InitStructure.DMA_BufferSize = 2;
- 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);
- /*ENABLE DMA1 CHANNEL1*/
- DMA_Cmd(DMA1_Channel1, ENABLE);
- /*------------ADC1 configuration with DMA enabled---------*/
- /*Enable the HSI oscillator*/
- RCC_HSICmd(ENABLE);
- /*Enable GPIOA Clock*/
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
- GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- /*Check that HSI oscillator is ready*/
- while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);
-
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
- ADC_DeInit(ADC1);
- ADC_InitStructure.ADC_ScanConvMode = ENABLE;
- ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
- ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
- ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
- ADC_InitStructure.ADC_NbrOfConversion = 2;
- ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
- ADC_Init(ADC1, &ADC_InitStructure);
- /*ADC1 regular channel10 configuration*/
- ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 1, ADC_SampleTime_48Cycles);
- ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 2, ADC_SampleTime_48Cycles);
-
- ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
-
- //Enable ADC1 DMA
- ADC_DMACmd(ADC1, ENABLE);
-
- //Enable ADC1
- ADC_Cmd(ADC1, ENABLE);
- /*Wait until the ADC1 is ready*/
- while(ADC_GetFlagStatus(ADC1, ADC_FLAG_ADONS) == RESET);
- /*Start ADC1 Software Conversion*/
- ADC_SoftwareStartConv(ADC1);
- }
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