求助stm32f4 dma多路adc的问题

社会我佩奇 · 发表于 2018-7-20 20:55:27

#include "sys.h"
#include "delay.h"
#include "usart.h"
#include "led.h"
#include "lcd.h"
#include "adc.h"

int Adc_Value[4];

void adc_configure(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_DMA2, ENABLE);

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_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_Div4;
  ADC_CommonInit(&ADC_CommonInitStructure);

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 = 6;
  ADC_Init(ADC1, &ADC_InitStructure);

  ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 1, ADC_SampleTime_480Cycles );
  ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 2, ADC_SampleTime_480Cycles );
  ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 3, ADC_SampleTime_480Cycles );
  ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 4, ADC_SampleTime_480Cycles );

DMA_DeInit(DMA2_Stream0);
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
  DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR;
  DMA_InitStructure.DMA_Memory0BaseAddr = (u32)&Adc_Value;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_BufferSize = 0X14;
  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_PeripheralDataSize_HalfWord;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  DMA_Init(DMA2_Stream0, &DMA_InitStructure);

DMA_Cmd(DMA2_Stream0, ENABLE);
ADC_DMARequestAfterLastTransferCmd(ADC1,ENABLE);
  ADC_DMACmd(ADC1, ENABLE);

ADC_SoftwareStartConv(ADC1);
}

int main(void)
{
uart_init(9600);
adc_configure();
while(1)
{
if(DMA_GetFlagStatus(DMA2_Stream0,DMA_FLAG_TCIF0)!=RESET)
{
printf("%d",Adc_Value[0]);
   printf("%d",Adc_Value[1]);
   printf("%d",Adc_Value[2]);
   printf("%d",Adc_Value[3]);
   DMA_ClearFlag(DMA2_Stream0,DMA_FLAG_TCIF0);
}
}
}
这是代码，可是串口助手显示全是0 并没有转换出电压请问大佬们怎么回事