一、ADC概念

实现模拟信号转换成数字信号就是这样子= =

二、代码框架

#include "stm32f10x.h"
void delay(u32 kk)
{
  while(kk--);
}
int main()
{
  u16 ad=0,adc0=0;  

  GPIO_InitTypeDef GPIO_InitStructure;
  ADC_InitTypeDef ADC_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_ADC1, ENABLE);

  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
  GPIO_Init(GPIOA, &GPIO_InitStructure);

    ADC_InitStructure.ADC_Mode= ADC_Mode_Independent;
    ADC_InitStructure.ADC_ScanConvMode=DISABLE;
    ADC_InitStructure.ADC_ContinuousConvMode=ENABLE;
    ADC_InitStructure.ADC_ExternalTrigConv=ADC_ExternalTrigConv_None;
    ADC_InitStructure.ADC_DataAlign=ADC_DataAlign_Right;
    ADC_InitStructure.ADC_NbrOfChannel=1;
    ADC_Init(ADC1,&ADC_InitStructure);
    ADC_RegularChannelConfig(ADC1,ADC_Channel_0, 1,ADC_SampleTime_1Cycles5);
    ADC_Cmd(ADC1,ENABLE);
    ADC_SoftwareStartConvCmd(ADC1,ENABLE);

  while(1)
  {
        while(ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC)==RESET);
        ad=ADC_GetConversionValue(ADC1);
        adc0=ad;
  }

}