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#include "volgather.h"
#include "usart.h"
#include "delay.h"
#include "stdio.h"
#define ADC1_DR_Address  (u32)0x4001244C

__IO uint16_t  ADC_ConvertedValue;
float  ADC_ConvertedValueLocal;


/*
 * 函数名：ADC1_GPIO_Config
 * 描述  ：使能ADC1和DMA1的时钟，初始化PA.01
 * 输入  : 无
 * 输出  ：无
 * 调用  ：内部调用
 */
static void ADC1_GPIO_Config(void)
{
GPIO_InitTypeDef GPIO_InitStructure;


RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);//Enable DMA clock 
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);//Enable ADC1 and GPIOC clock

/* Configure PA1  as analog input */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOA, &GPIO_InitStructure); // PA1,输入时不用设置速率
}


/* 函数名：ADC1_Mode_Config
 * 描述  ：配置ADC1的工作模式为MDA模式
 * 输入  : 无
 * 输出  ：无
 * 调用  ：内部调用
 */
static void ADC1_Mode_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;
ADC_InitTypeDef ADC_InitStructure;

/* DMA channel1 configuration */
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address; //ADC地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue;//内存地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//外设地址固定
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;  //内存地址固定
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//半字
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);
DMA_Cmd(DMA1_Channel1, ENABLE);//Enable DMA channel1 

/* ADC1 configuration */
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//独立ADC模式
ADC_InitStructure.ADC_ScanConvMode = DISABLE ;//禁止扫描模式，扫描模式用于多通道采集
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;//开启连续转换模式，即不停地进行ADC转换
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;//不使用外部触发转换
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //采集数据右对齐
ADC_InitStructure.ADC_NbrOfChannel = 1; //要转换的通道数目1
ADC_Init(ADC1, &ADC_InitStructure);


RCC_ADCCLKConfig(RCC_PCLK2_Div6); //配置ADC时钟，为PCLK2的2分频，即12MHz
ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_55Cycles5);//配置ADC1的通道1为55.5个采样周期，序列为1 
ADC_DMACmd(ADC1, ENABLE);//Enable ADC1 DMA 
ADC_Cmd(ADC1, ENABLE);//Enable ADC1 
ADC_ResetCalibration(ADC1);//复位校准寄存器   
while(ADC_GetResetCalibrationStatus(ADC1));//等待校准寄存器复位完成 
ADC_StartCalibration(ADC1);//ADC校准 
while(ADC_GetCalibrationStatus(ADC1));// 等待校准完成
ADC_SoftwareStartConvCmd(ADC1, ENABLE);// 由于没有采用外部触发，所以使用软件触发ADC转换 
}

/*
 * 函数名：ADC1_Init
 * 描述  ：无
 * 输入  ：无
 * 输出  ：无
 * 调用  ：外部调用
 */
void ADC1_Init(void)
{
ADC1_GPIO_Config();
ADC1_Mode_Config();
}


/*void Filter(unsigned char Gather_Num)
{
unsigned int  Temp_Val=0;
for(unsigned char i=0;i<Gather_Num;i++)
{
Temp_Val+=(ADC_ConvertedValue>>12)*330;
Delay_us(4);
}
        ADC_ConvertedValueLocal=Temp_Val/Gather_Num;
        
//return ADC_ConvertedValueLocal;
} */
void Voltage_Conv(unsigned char Gather_Num)
{ 
  
 // Filter(Gather_Num); //读取AD转换的值
  ADC_ConvertedValueLocal = (float)(ADC_ConvertedValue>>12)*3.3;
  printf("\r\n The current AD HEX_value = 0x%04X \r\n",ADC_ConvertedValue); 
  printf("\r\n The current AD DEC_value = %fV \r\n",ADC_ConvertedValueLocal); 
 

}

为什么ADC_ConvertedValue有输出值，而ADC_ConvertedValueLocal总输出0.0000呢