STM32F401VGT6两路ADC使用DMA连续采集问题

0609020221

[mw_shl_code=c,true]#define ADC1_DR_ADDRESS ((uint32_t)0x4001204C) #define avg_time 20 #define ADC_Buffer 2000 int main(void) { u16 i; u16 j = 0; ADC_DMA_Config(); ADC_Config(); USART_Configuration(); for (i=0; i<ADC_Buffer; i++) { ADC_Buffer_Tmp = 0; } while(1) { ADC_SoftwareStartConv(ADC1);/* Start ADC Software Conversion */ while(RESET == DMA_GetFlagStatus(DMA2_Stream0,DMA_FLAG_TCIF0)); for(i=0; i<ADC_Buffer; i++) { ADC_Buffer_Tmp = ADC1ConvertedValue*3.3/4096; printf("%f \r\n",ADC_Buffer_Tmp); } Delay(500); } } void ADC_Config(void) { GPIO_InitTypeDef GPIO_InitStructure; ADC_CommonInitTypeDef ADC_CommonInitStructure; ADC_InitTypeDef ADC_InitStructure; RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC,ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1; //PC0 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ; GPIO_Init(GPIOC, &GPIO_InitStructure); /*ADC Common configuration *************************************************/ ADC_DeInit(); ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent; ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles; ADC_CommonInitStructure.ADC_DMAAccessMode =ADC_DMAAccessMode_1 ; ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2; ADC_CommonInit(&ADC_CommonInitStructure); /* ADC1 regular channel 12 configuration ***********************************/ ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; 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_Init(ADC1, &ADC_InitStructure); ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_3Cycles); ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_3Cycles); //ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE); /* Enable ADC1 *************************************************************/ ADC_Cmd(ADC1, ENABLE); ADC_DMACmd(ADC1, ENABLE); ADC_SoftwareStartConv(ADC1);/* Start ADC Software Conversion */ } void ADC_DMA_Config() { DMA_InitTypeDef DMA_InitStructure; /* DMA2 Stream0 channel0 configuration **************************************/ RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE); DMA_InitStructure.DMA_Channel = DMA_Channel_0; DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_ADDRESS; DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC1ConvertedValue; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory; DMA_InitStructure.DMA_BufferSize = ADC_Buffer; 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_Normal ; DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable; DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull; DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single; DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single; DMA_Init(DMA2_Stream0, &DMA_InitStructure); DMA_Cmd(DMA2_Stream0, ENABLE); } 通过串口输出两路采集结果，当输出2000个数据后，ADC1ConvertedValue中的数据没有更新，和前2000个数据一模一样。大家帮忙看看什么地方出了问题，万分感谢！ [mw_shl_code=c,true] [/mw_shl_code] [/mw_shl_code]

0609020221

没有人回答？

正点原子

帮顶。。。。