首页 > 其他分享 >stm32f429iDisc AD规则组多通道+DMA转运

stm32f429iDisc AD规则组多通道+DMA转运

时间：2024-07-11 13:31:36浏览次数：12  
标签：DMA ENABLE AD 多通道 InitStructure ADC ADC1 GPIO

扫描模式+非连续触发

uint16_t Adc_Value[5] = {0};
DMA_InitTypeDef DMA_InitStructure;
void AD_Init(void){
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
	
// -------------------------------------GPIO配置---------------------------------------
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
	GPIO_InitStructure.GPIO_Speed = GPIO_High_Speed;
	GPIO_Init(GPIOC, &GPIO_InitStructure);
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
// ---------------------------------------ADC配置----------------------------------------
	ADC_CommonInitTypeDef ADC_CommonInitStructure;
	ADC_InitTypeDef ADC_InitStructure;
	
	ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
	ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;
	ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1; // DMA配置
	ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_8Cycles; 
	
	ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;  // 分辨率
	ADC_InitStructure.ADC_ScanConvMode = ENABLE;  // 扫描
	ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;  // 非连续
	ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; // 无外部触发ADC
	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_TRGO; // 触发事件:因无外部触发，无用配置
	ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
	ADC_InitStructure.ADC_NbrOfConversion = 5; // ADC转换通道数
	ADC_CommonInit(&ADC_CommonInitStructure);
	ADC_Init(ADC1, &ADC_InitStructure);
	
	ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 1, ADC_SampleTime_84Cycles); // 配置通道和采样周期
	ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 2, ADC_SampleTime_84Cycles); // 配置通道和采样周期
	ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 3, ADC_SampleTime_84Cycles); // 配置通道和采样周期
	ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 4, ADC_SampleTime_84Cycles); // 配置通道和采样周期
	ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 5, ADC_SampleTime_84Cycles); // 配置通道和采样周期
// --------------------------------------DMA配置----------------------------------------
	DMA_InitStructure.DMA_Channel = DMA_Channel_0;
	DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
	DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)Adc_Value;
	DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
	DMA_InitStructure.DMA_BufferSize = 5;
	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_Disable;
//	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);
	ADC_DMACmd(ADC1, ENABLE);
	
	ADC_Cmd(ADC1, ENABLE);
}
// ----------------------------------main()中循环调用------------------------------------
void AD_ValueTransfer(void){
	DMA_Cmd(DMA2_Stream0, DISABLE);
	ADC_DMACmd(ADC1, DISABLE);
	DMA_Init(DMA2_Stream0, &DMA_InitStructure);
	ADC_DMACmd(ADC1, ENABLE);
	DMA_Cmd(DMA2_Stream0, ENABLE);
	
	ADC_SoftwareStartConv(ADC1); //软件触发ADC1，此时ADC1进入采样转换状态
	while(DMA_GetFlagStatus(DMA2_Stream0,DMA_FLAG_TCIF0) == RESET);
	DMA_ClearFlag(DMA2_Stream0,DMA_FLAG_TCIF0);
}
// ------------------------------------获取转换值--------------------------------------
uint16_t Get_Adc_Value(uint8_t i){
	return Adc_Value[i];
}

扫描模式+连续触发

uint16_t Adc_Value[5] = {0};
DMA_InitTypeDef DMA_InitStructure;
void AD_Init(void){
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
	
// -------------------------------------GPIO配置---------------------------------------
	GPIO_InitTypeDef GPIO_InitStructure;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
	GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
	GPIO_InitStructure.GPIO_Speed = GPIO_High_Speed;
	GPIO_Init(GPIOC, &GPIO_InitStructure);
	
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
	GPIO_Init(GPIOA, &GPIO_InitStructure);
// ---------------------------------------ADC配置----------------------------------------
	ADC_CommonInitTypeDef ADC_CommonInitStructure;
	ADC_InitTypeDef ADC_InitStructure;
	
	ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
	ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;
	ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1; // DMA配置
	ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_8Cycles; 
	
	ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;  // 分辨率
	ADC_InitStructure.ADC_ScanConvMode = ENABLE;  // 扫描
	ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;  // 连续
	ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; // 无外部触发ADC
	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_TRGO; // 触发事件:因无外部触发，无用配置
	ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
	ADC_InitStructure.ADC_NbrOfConversion = 5; // ADC转换通道数
	ADC_CommonInit(&ADC_CommonInitStructure);
	ADC_Init(ADC1, &ADC_InitStructure);
	
	ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 1, ADC_SampleTime_84Cycles); // 配置通道和采样周期
	ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 2, ADC_SampleTime_84Cycles); // 配置通道和采样周期
	ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 3, ADC_SampleTime_84Cycles); // 配置通道和采样周期
	ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 4, ADC_SampleTime_84Cycles); // 配置通道和采样周期
	ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 5, ADC_SampleTime_84Cycles); // 配置通道和采样周期
// --------------------------------------DMA配置----------------------------------------
	DMA_InitStructure.DMA_Channel = DMA_Channel_0;
	DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
	DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)Adc_Value;
	DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
	DMA_InitStructure.DMA_BufferSize = 5;
	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_Disable;
//	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);
	ADC_DMACmd(ADC1, ENABLE);
	ADC_Cmd(ADC1, ENABLE);

    ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
	ADC_SoftwareStartConv(ADC1); //软件触发ADC1，此时ADC1进入采样转换状态
}
// -------------------------------main()中直接获取转换值---------------------------------
uint16_t Get_Adc_Value(uint8_t i){
	return Adc_Value[i];
}

标签：DMA,ENABLE,AD,多通道,InitStructure,ADC,ADC1,GPIO
From： https://blog.csdn.net/qq_39683145/article/details/140349324

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