STM32 ADC+DMA(标准库)

编译工具：MDK5代码生成工具：CubeMX（veision5.6.1）芯片：STM32072CBT6

直接上代码

ADC.h文件

#ifndef _adc_h #define _adc_h #include "sys.h" #define LEAKAGE_0 ADC_Channel_0 #define LEAKAGE_1 ADC_Channel_1 #define LEAKAGE_2 ADC_Channel_2 #define LEAKAGE_3 ADC_Channel_3 #define LEAKAGE_4 ADC_Channel_4 #define LEAKAGE_5 ADC_Channel_5 #define LEAKAGE_6 ADC_Channel_6 void ADC1_DMA_Init(void); #endif

ADC.c文件

#include "adc.h" #define ADC1_DR_Address ((u32)0x40012400+0x4c) uint16_t adcvalue[7]; void ADC1_GPIO_Config(void) { GPIO_InitTypeDef GPIO_InitStructure; /* Enable DMA clock */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_AHBPeriph_GPIOA , ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 |GPIO_Pin_2 |GPIO_Pin_3 | GPIO_Pin_4 |GPIO_Pin_5 | \ GPIO_Pin_6 | GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN; GPIO_Init(GPIOB, &GPIO_InitStructure); } void ADC1_Mode_Config(void) { DMA_InitTypeDef DMA_InitStructure; ADC_InitTypeDef ADC_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; /* DMA channel1 configuration */ DMA_DeInit(DMA1_Channel1); DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR; //ADC地址 DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&adcvalue;//内存地址 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = 7; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外设地址固定 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存地址递增 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //半字（16位） DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //循环传输 DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(DMA1_Channel1, &DMA_InitStructure); ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular); /* ADC1 configuration */ ADC_StructInit(&ADC_InitStructure); ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b; ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward ; ADC_Init(ADC1, &ADC_InitStructure); /*配置ADC时钟，为PCLK2的2分频，即24Hz*/ RCC_ADCCLKConfig(RCC_ADCCLK_PCLK_Div2); ADC_ChannelConfig(ADC1, LEAKAGE_0, ADC_SampleTime_55_5Cycles); ADC_ChannelConfig(ADC1, LEAKAGE_1,ADC_SampleTime_55_5Cycles); ADC_ChannelConfig(ADC1, LEAKAGE_2,ADC_SampleTime_55_5Cycles); ADC_ChannelConfig(ADC1, LEAKAGE_3,ADC_SampleTime_55_5Cycles); ADC_ChannelConfig(ADC1, LEAKAGE_4,ADC_SampleTime_55_5Cycles); ADC_ChannelConfig(ADC1, LEAKAGE_5,ADC_SampleTime_55_5Cycles); ADC_ChannelConfig(ADC1, LEAKAGE_6,ADC_SampleTime_55_5Cycles); NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_InitStructure.NVIC_IRQChannelPriority = 1; NVIC_Init(&NVIC_InitStructure); DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE); ADC_GetCalibrationFactor(ADC1); //校准ADC /* Enable DMA channel1 */ DMA_Cmd(DMA1_Channel1, ENABLE); /* Enable ADC1 DMA */ ADC_DMACmd(ADC1, ENABLE); /* Enable ADC1 */ ADC_Cmd(ADC1, ENABLE); while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_ADEN)); ADC_StartOfConversion(ADC1); } void DMA1_Channel1_IRQHandler(){ if(DMA_GetFlagStatus(DMA1_IT_TC1)!=RESET){ DMA_ClearFlag(DMA1_IT_TC1); ADC_StartOfConversion(ADC1); } } void ADC1_DMA_Init(void) { ADC1_GPIO_Config(); ADC1_Mode_Config(); }