#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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