stm32f205

只看该作者 · 2017-11-10 13:14

用stm32f205芯片，写了个读取电压的程序，用ADC+DMA，单通道读取，程序一直跑不起来，麻烦各位大神帮小生看看，感激不尽！！下面是驱动部分...，不知道哪里写错了
static void ADCx_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;

GPIO_Init(GPIOC, &GPIO_InitStructure);
}

static void ADCx_Mode_Config(void)
{
DMA_InitTypeDef DMA_InitStruct;
ADC_InitTypeDef ADC_InitStruct;
ADC_CommonInitTypeDef ADC_CommonInitStruct;

RCC_APB2PeriphClockCmd ( RCC_APB2Periph_ADC1, ENABLE );
RCC_AHB1PeriphClockCmd ( RCC_AHB1Periph_DMA2, ENABLE );

DMA_DeInit(DMA2_Stream0);
  DMA_InitStruct.DMA_Channel = DMA_Channel_0;
  DMA_InitStruct.DMA_PeripheralBaseAddr = (uint32_t)(&(ADC1->DR));
  DMA_InitStruct.DMA_Memory0BaseAddr = (uint32_t)&ADC_ConvertedValue;
  DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralToMemory;/*ÍâÉèµ½ÄÚ´æ*/
  DMA_InitStruct.DMA_BufferSize = 1;
  DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Disable;
  DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
  DMA_InitStruct.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStruct.DMA_Priority = DMA_Priority_High;
  DMA_InitStruct.DMA_FIFOMode = DMA_FIFOMode_Disable;
  DMA_InitStruct.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
  DMA_InitStruct.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_InitStruct.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

  DMA_Init(DMA2_Stream0, &DMA_InitStruct);
DMA_Cmd(DMA2_Stream0, ENABLE);

ADC_InitStruct.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStruct.ADC_ScanConvMode = DISABLE;
ADC_InitStruct.ADC_ContinuousConvMode = ENABLE;
ADC_InitStruct.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStruct.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStruct.ADC_NbrOfConversion = 1;

ADC_CommonInitStruct.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStruct.ADC_Prescaler = ADC_Prescaler_Div6;
ADC_CommonInitStruct.ADC_DMAAccessMode = ADC_DMAAccessMode_3;
ADC_CommonInitStruct.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_10Cycles;

ADC_Init(ADC1, &ADC_InitStruct);
ADC_CommonInit(&ADC_CommonInitStruct);

ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_15Cycles);

ADC_Cmd(ADC1, ENABLE);
ADC_SoftwareStartConv(ADC1);
}