HK32f103cbt6 ADC 问题

#include "power-adc.h"



#define USED_ADC1 ADC1

#define USED_ADC_RCC RCC_APB2Periph_ADC1

#define USED_ADC_GPIO_RCC RCC_APB2Periph_GPIOA



#define USED_ADC_PORT GPIOA

#define USED_ADC_PIN  GPIO_Pin_4

#define USED_ADC_CHANNEL ADC_Channel_4



float voltage;

//ADC时钟开启

void ADC_RCC_Configuration(void)

{

    RCC_APB2PeriphClockCmd(USED_ADC_GPIO_RCC | USED_ADC_RCC, ENABLE);

    RCC_ADCCLKConfig(RCC_PCLK2_Div6);

}

//ADC GPIO设置

void ADC_GPIO_Config(void)

{

    GPIO_InitTypeDef        GPIO_InitStructure;

    GPIO_InitStructure.GPIO_Pin = USED_ADC_PIN;

    //GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;

    GPIO_Init(USED_ADC_PORT,&GPIO_InitStructure);

}

//ADC 设置

void ADC_Config(ADC_TypeDef* ADCx,uint8_t ADC_Channel)

{

    ADC_InitTypeDef ADC_InitStructure;

          //ADC_StructInit(&ADC_InitStructure);

    ADC_DeInit(ADCx);

    ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;

    ADC_InitStructure.ADC_ScanConvMode =DISABLE;

    ADC_InitStructure.ADC_ContinuousConvMode = DISABLE ;

    ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;

    ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;

    ADC_InitStructure.ADC_NbrOfChannel = 1;

    ADC_Init(ADCx,&ADC_InitStructure);

    DELAY_SOME(10);

    ADC_RegularChannelConfig(ADCx, ADC_Channel, 1, ADC_SampleTime_239Cycles5 );

    DELAY_SOME(10);

    ADC_Cmd(ADCx, ENABLE);

    DELAY_SOME(10);



    ADC_ResetCalibration(ADCx);

    while(ADC_GetResetCalibrationStatus(ADCx));

    DELAY_SOME(10);

    ADC_StartCalibration(ADCx);

    while(ADC_GetCalibrationStatus(ADCx));







}

//初始化ADC

void ADC_INIT()

{

    //ADC时钟开启

    ADC_RCC_Configuration();

    //ADC GPIO设置

    ADC_GPIO_Config();



    //ADC 设置

    ADC_Config(USED_ADC1,USED_ADC_CHANNEL);

}



//获取ADC的值

void get_ADC_Value()

{

    ADC_ClearFlag(USED_ADC1,ADC_FLAG_EOC);

    ADC_SoftwareStartConvCmd(USED_ADC1, ENABLE);//开启ADC

    DELAY_SOME(10);

    while(RESET == ADC_GetFlagStatus(USED_ADC1,ADC_FLAG_EOC)); 

    voltage = 3.3*ADC_GetConversionValue(USED_ADC1)/4096;

    ADC_ClearFlag(USED_ADC1,ADC_FLAG_EOC);

    ADC_SoftwareStartConvCmd(USED_ADC1, DISABLE);//关闭ADC



}