环境: 主机:XP 开发环境:MDK4.23 MCU:STM32F103CBT6
说明: 通过脚PA1,PA2采集AD。每路AD采集10次。 #include "ad_driver.h" //全局变量 //AD采样存放空间 __IO uint16_t ADCConvertedValue[20]; //函数 //初始化AD void init_ad(void) { ADC_InitTypeDef ADC_InitStructure; DMA_InitTypeDef DMA_InitStructure; GPIO_InitTypeDef GPIO_InitStructure; //---------------------充电AD初始化-------------------- //启动DMA时钟 RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //启动ADC1时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE); //采样脚设置 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1 | GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; GPIO_Init(GPIOA, &GPIO_InitStructure); //DMA1通道1配置 DMA_DeInit(DMA1_Channel1); //外设地址 DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_ADDRESS; //内存地址 DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADCConvertedValue; //dma传输方向单向 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //设置DMA在传输时缓冲区的长度 DMA_InitStructure.DMA_BufferSize = 20; //设置DMA的外设递增模式,一个外设 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //设置DMA的内存递增模式 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //外设数据字长 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //内存数据字长 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //设置DMA的传输模式:连续不断的循环模式 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //设置DMA的优先级别 DMA_InitStructure.DMA_Priority = DMA_Priority_High; //设置DMA的2个memory中的变量互相访问 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; DMA_Init(DMA1_Channel1, &DMA_InitStructure); //使能通道1 DMA_Cmd(DMA1_Channel1, ENABLE); //ADC1配置 //独立工作模式 ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //扫描方式 ADC_InitStructure.ADC_ScanConvMode = ENABLE; //连续转换 ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //外部触发禁止 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //数据右对齐 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //用于转换的通道数 ADC_InitStructure.ADC_NbrOfChannel = 2; ADC_Init(ADC1, &ADC_InitStructure); //规则模式通道配置 ADC_RegularChannelConfig(ADC1, ADC_Channel_1 , 1, ADC_SampleTime_239Cycles5); ADC_RegularChannelConfig(ADC1, ADC_Channel_2 , 2, ADC_SampleTime_239Cycles5); //使能ADC1的DMA ADC_DMACmd(ADC1, ENABLE); //使能ADC1 ADC_Cmd(ADC1, ENABLE); //使能ADC1复位校准寄存器 ADC_ResetCalibration(ADC1); //检查校准寄存器是否复位完毕 while(ADC_GetResetCalibrationStatus(ADC1)); //开始校准 ADC_StartCalibration(ADC1); //检测是否校准完毕 while(ADC_GetCalibrationStatus(ADC1)); //开启ADC1的软件转换 ADC_SoftwareStartConvCmd(ADC1, ENABLE); } //获得充电电压 float voltage_charge(void) { uint8_t i = 0; uint16_t sum = 0; float v = 0; //取得10次充电电压平均值 for (i = 0;i < 10;i++) { sum += ADCConvertedValue[i * 2]; } sum /= 10; //变换成电压值 v = 0.002991 * sum; return v; } //获得放电电压 float voltage_discharge(void) { uint8_t i = 0; uint16_t sum = 0; float v = 0; //取得10次充电电压平均值 for (i = 0;i < 10;i++) { sum += ADCConvertedValue[i * 2 + 1]; } sum /= 10; //变换成电压值 v = 0.002991 * sum; return v; }
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