stm32F4多通道ADC+DMA接收不到数据

会飞的菜鸡 · 发表于 2019-7-30 19:00:00

小弟最近在用stm32F407做一个11路的ADC数据采集，我的思路是ADC1的多通道转换后的数据直接通过DMA存储到ADCConvertedValue[ADC_CHANNEL_SIZE]这个数组中。测试发现，数组的数据一直为0，如果不使用DMA模式，则能够读取到转换后的数据，因而我猜测大概率是DMA配置的问题。然而小弟才疏学浅，看了半天也没有找出原因所在，希望大家发现问题不吝赐教！

#include "myadc.h"
#define ADC_CHANNEL_SIZE  11
extern unsigned short ADCConvertedValue[ADC_CHANNEL_SIZE];

void ADC_Config_Conver(void)
{

GPIO_InitTypeDef  GPIO_InitStructure;
DMA_InitTypeDef    DMA_InitStructure;
ADC_InitTypeDef    ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;

//GPIO
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//使能GPIOA时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);//使能GPIOB时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);//使能GPIOC时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);//使能ADC1时钟

RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,ENABLE);       //ADC1复位
  RCC_APB2PeriphResetCmd(RCC_APB2Periph_ADC1,DISABLE);       //复位结束
  //先初始化IO口
  //PC0,1,2,3对应ADC1的通道10，11，12，13,14,15
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;//模拟输入
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;// 上拉
GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化
//PA5,6,7对应ADC1的通道5，6，7
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;//模拟输入
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;// 上拉
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化
//PB0,1对应ADC1的通道8,9
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;//模拟输入
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;// 上拉
GPIO_Init(GPIOB, &GPIO_InitStructure);//初始化

//DMA---------------------------------------------------------
DMA_Cmd(DMA2_Stream0, DISABLE);
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&(ADC1->DR);
DMA_InitStructure.DMA_Memory0BaseAddr = (u32)&ADCConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = ADC_CHANNEL_SIZE;
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_FIFOMode = DMA_FIFOMode_Enable;
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_DoubleBufferModeConfig(DMA2_Stream0,(uint32_t)(u16 *)(m_ADCValue1),DMA_Memory_0); //DMA_Memory_0?????
// DMA_DoubleBufferModeCmd(DMA2_Stream0,ENABLE);

DMA_Cmd(DMA2_Stream0, ENABLE);
//-------------------------------ADC---------------------------------------------------------
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInit(&ADC_CommonInitStructure);

/* ADC1 Init ****************************************************************/
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_ExternalTrigConv =  0;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 11;
ADC_Init(ADC1, &ADC_InitStructure);

ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
ADC_DMACmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE);
ADC_RegularChannelConfig(ADC1, ADC_Channel_5, 1, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 2, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 3, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 4, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 5, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 6, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 7, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 8, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 9, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 10, ADC_SampleTime_480Cycles);
ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 11, ADC_SampleTime_480Cycles);

ADC_SoftwareStartConv(ADC1);
//while(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC)==RESET);
}