STM32

f4 adc dma 双缓冲

2019-07-21 01:42发布

站内问答 / STM32/STM8
8458 1 1751
搞了好多天了，看了论坛上的相关帖子，发现我的程序在硬件仿真的时候，只进入一次中断，之后就时钟不进入了，数据也没有传输得到，adc溢出，求大神指教啊！！

unsigned int adc_value_buf_one[32];
unsigned int adc_value_buf_two[32];
volatile unsigned char adc_conv_comp_flag=0;

void ADC_Config(void)
{
  ADC_InitTypeDef       ADC_InitStructure;
  ADC_CommonInitTypeDef ADC_CommonInitStructure;
  DMA_InitTypeDef       DMA_InitStructure;
  GPIO_InitTypeDef      GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure; 

  /* Enable ADCx, DMA and GPIO clocks ****************************************/ 
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);  
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);  
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
  
DMA_DeInit(DMA2_Stream0);
  /* DMA2 Stream0 channel0 configuration **************************************/
  DMA_InitStructure.DMA_Channel = DMA_Channel_0;  //?????÷?¨??
  DMA_InitStructure.DMA_PeripheralBaseAddr = ((uint32_t)0x4001224C);//???è???·,adc_dr
  DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&adc_value_buf_one;//?????÷???·
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;//????????·??ò
  DMA_InitStructure.DMA_BufferSize = 32;//??????????????????
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//???è???????????????????ó?????è????????
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//?????÷???????????????????ó???????÷????????
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//???è?????í??
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//?????÷?????í??
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//???·????
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;//?????÷??????
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; //FIFO????        
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;//FIFO·§??????
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;//?????÷??·?????
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;//???è??·?????
DMA_DoubleBufferModeConfig(DMA2_Stream0, (uint32_t)&adc_value_buf_two,DMA_Memory_0);//?????????????? DMA_Memory_0?×??????
  DMA_DoubleBufferModeCmd(DMA2_Stream0, ENABLE);
        
//????????
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 4;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
DMA_ITConfig(DMA2_Stream0,DMA_IT_TC,ENABLE);

  DMA_Init(DMA2_Stream0, &DMA_InitStructure);//DMA2_Stream0???????÷????
  //DMA_Cmd(DMA2_Stream0, ENABLE);

DMA_ClearITPendingBit(DMA2_Stream0, DMA_IT_TCIF0);//?????????÷0?????ê??????±ê????
  DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);//DMA2?????÷0?????ê??????????





  /* Configure ADC1 Channel 6 7 14 15 pin as analog input ******************************/
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_5;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* ADC Common Init **********************************************************/
  ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;//?à??adc????????
  ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;//adc?±??2·???  42MHZ
  ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;//?????à??adc??????????dma
  ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;//?à??adc??????2?????ù?×???®???????±
  ADC_CommonInit(&ADC_CommonInitStructure);

  /* ADC1 Init ****************************************************************/
  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;//12??·?±???
  ADC_InitStructure.ADC_ScanConvMode = ENABLE;//?¨?è????
  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//????×???????
  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;//???ò?¨????????·?????
  ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;//???ò×é????????
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//????????
  ADC_InitStructure.ADC_NbrOfConversion = 4;//???ò?¨??×????ò??×???×???
  ADC_Init(ADC1, &ADC_InitStructure);

  /* ADC1 regular channel7 configuration ,first convent,Sample Time is 3Cycles**************************************/
  ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 1, ADC_SampleTime_144Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 2, ADC_SampleTime_144Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 3, ADC_SampleTime_144Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 4, ADC_SampleTime_144Cycles);

 /* Enable DMA request after last transfer (Single-ADC mode) */
  ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);

  /* Enable ADC1 DMA */
  ADC_DMACmd(ADC1, ENABLE);

  /* Enable ADC1 */
  ADC_Cmd(ADC1, ENABLE); 
}


 void ADC_start(void) 
 { 
/* ??????????????????·????ù???????í????·?ADC×??? */  
ADC_SoftwareStartConv(ADC1); 
/* Enable ADC1 DMA */ 
ADC_DMACmd(ADC1, ENABLE); 

/* Enable ADC1 */ 
ADC_Cmd(ADC1, ENABLE); 
/* Enable DMA channel0 */ 
DMA_Cmd(DMA2_Stream0, ENABLE); 
//DMA_ITConfig(DMA2_Stream0,DMA_IT_TC| DMA_IT_HT,ENABLE); 
DMA_ITConfig(DMA2_Stream0,DMA_IT_TC,ENABLE); 
 } 
 
 
//DMA?????ê??????????
void DMA2_Stream0_IRQHandler(void)
{
if(DMA_GetITStatus(DMA2_Stream0,DMA_IT_TCIF0) != RESET)
{
DMA_ClearITPendingBit(DMA2_Stream0,DMA_IT_TCIF0);
//USER_LED=~USER_LED;
}
// else
// {
// DMA_ClearFlag(DMA2_Stream0,DMA_FLAG_HTIF0);
// }
}
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1条回答
电子小手
2019-07-21 05:48
找到问题了。(uint32_t)0x4001224C);这个是adc3的dr地址，改成(uint32_t)0x4001204C);就行了

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