求助 AD采样采不到值

找个用户名好难 · 发表于 2016-6-20 21:44:00

请大神帮我看看，我用的STM32F103C8T6，我这样为什么采不到电压数据
#include "stm32f10x.h"
#include "ADC.h"

uint16_t adv;

void ADC_Config(void)
{

   GPIO_InitTypeDef  GPIO_InitStructure;
   ADC_InitTypeDef  ADC_InitStructure;
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_ADC1, ENABLE);    //使能PA端口、ADC时钟
   RCC_ADCCLKConfig(RCC_PCLK2_Div8);    //配置ADC时钟，为PCLK2的8分频，即9MHz

   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;
       GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;    //模拟输入
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
   GPIO_Init(GPIOA,&GPIO_InitStructure);    //根据设定参数初始化GPIOA.0

   ADC_DeInit(ADC1);
      ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;    //独立模式
   ADC_InitStructure.ADC_ScanConvMode = DISABLE;          //单通道模式
   ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;       //连续转换
   ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //不使用外部触发转换
   ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;                //右对齐
   ADC_InitStructure.ADC_NbrOfChannel = 1;                               //扫描通道数1
   ADC_ClearFlag(ADC1,ADC_FLAG_EOC); //????
   ADC_Init(ADC1,&ADC_InitStructure);
   ADC_DMACmd(ADC1, DISABLE);                                           //关闭DMA请求
   ADC_Cmd(ADC1,ENABLE);                            //使能或者失能指定的ADC
   ADC_ResetCalibration(ADC1);
   while(ADC_GetResetCalibrationStatus(ADC1));    //等待复位校准寄存器复位完成
   ADC_StartCalibration(ADC1);
   while(ADC_GetCalibrationStatus(ADC1));    //等待ADC校准完成

}

uint16_t ADC_Value(void)
{

ADC_RegularChannelConfig(ADC1,ADC_Channel_1,1,ADC_SampleTime_55Cycles5);
ADC_SoftwareStartConvCmd(ADC1,ENABLE);             //使能ADC的软件转换启动功能
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));//判断ADC转换结束标志位等待转换结束
adv = ADC_GetConversionValue(ADC1);
return adv;

}

#include "stm32f10x.h"
#include "adc.h"
int main(void)
{
   ADC_Config();
   while(1)
   {
ADC_Value();

   }
}