STM32 ADC 多通道 DMA 问题？？

Posted 2023-04-30

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以下是DMA的配置
void DMA1_Configuration(void)

DMA_InitTypeDef DMA_InitStructure;

DMA_DeInit(DMA1_Channel1); //初始化DMA

DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR;//外设地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&DMA_ADC1; //内存地址

DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //外设作为数据的来源
DMA_InitStructure.DMA_BufferSize = 50;
// DMA_InitStructure.DMA_BufferSize = 2;

DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外设地址不递增
DMA_InitStructure.DMA_MemoryInc = DMA_PeripheralInc_Enable;//内存地址递增

DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//外设数据宽度半个字
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//内存数据宽度半个字

DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //工作在循环模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //高优先级
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //没有设置为内存到内存

DMA_Init(DMA1_Channel1, &DMA_InitStructure); //初始化DMA1
DMA_Cmd(DMA1_Channel1,ENABLE);

设置内存地址为递增，但是在调试时，我发现每次写入的地址都不变，没有递增，请问这是什么原因？纠结了很长时间？？？求教呀。。。

直接给你个能用的，你自己研究研究

vu16 ADC_ConvertedValue[Sample_Num][Channel_Num];
void ADC_DMA_Config(void)

DMA_InitTypeDef DMA_InitStructure;

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = Sample_Num*Channel_Num;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外设地址不变
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//内存地址递增
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_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel1,ENABLE);

void ADC1_Config(void)

GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
ADC_DMA_Config();

RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
// ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//ADC1和ADC2工作在独立模式
ADC_InitStructure.ADC_ScanConvMode = ENABLE;//多通道
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//连续转换
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;//软件启动转换
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//转换结果右对齐
ADC_InitStructure.ADC_NbrOfChannel = Channel_Num;//通道数目
ADC_Init(ADC1, &ADC_InitStructure);
// ADC_TempSensorVrefintCmd(ENABLE);//使能片内温度传感器

RCC_ADCCLKConfig(RCC_PCLK2_Div6); //PCLK 6分频
ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_55Cycles5);//通道，转换次序，转换时间
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 3, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 4, ADC_SampleTime_55Cycles5);
// ADC_RegularChannelConfig(ADC1, ADC_Channel_16, 6, ADC_SampleTime_239Cycles5);

ADC_DMACmd(ADC1, ENABLE);

ADC_Cmd(ADC1, ENABLE);
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);//开始校准
while(ADC_GetCalibrationStatus(ADC1));
ADC_SoftwareStartConvCmd(ADC1, ENABLE);//使能ADC的软件转换启动功能

参考技术A 可以，多通道数据采集不只是dma一种方式，具体你可以看一下野火stm32的pdf文件