IndoorEnvSystem/stm32/HARDWARE/ADC/adc.c

 #include "adc.h"
 #include "delay.h"

 
	   
		   
//<EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD>ADC
//<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ǽ<EFBFBD><EFBFBD>Թ<EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD>Ϊ<EFBFBD><EFBFBD>
//<EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ĭ<EFBFBD>Ͻ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD>0~3																	   
void  Adc_Init(void)
{ 	
	ADC_InitTypeDef ADC_InitStructure; 
	GPIO_InitTypeDef GPIO_InitStructure;

	RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB |RCC_APB2Periph_ADC1	, ENABLE );	  //ʹ<EFBFBD><EFBFBD>ADC1ͨ<EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>
   

	RCC_ADCCLKConfig(RCC_PCLK2_Div6);   //<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ADC<EFBFBD><EFBFBD>Ƶ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>6 72M/6=12,ADC<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD>䲻<EFBFBD>ܳ<EFBFBD><EFBFBD><EFBFBD>14M

	//PA1 <EFBFBD><EFBFBD>Ϊģ<EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>                         
	GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;		//ģ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	GPIO_Init(GPIOB, &GPIO_InitStructure);	

	ADC_DeInit(ADC1);  //<EFBFBD><EFBFBD>λADC1 

	ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;	//ADC<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ģʽ:ADC1<EFBFBD><EFBFBD>ADC2<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڶ<EFBFBD><EFBFBD><EFBFBD>ģʽ
	ADC_InitStructure.ADC_ScanConvMode = ENABLE;	//ģ<EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD>ͨ<EFBFBD><EFBFBD>ģʽ
	ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;	//ģ<EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ڵ<EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD>ģʽ
	ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;	//ת<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ⲿ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
	ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;	//ADC<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ҷ<EFBFBD><EFBFBD><EFBFBD>
	ADC_InitStructure.ADC_NbrOfChannel = 1;	//˳<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>й<EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ADCͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>Ŀ
	ADC_Init(ADC1, &ADC_InitStructure);	//<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ADC_InitStruct<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD>IJ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʼ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ADCx<EFBFBD>ļĴ<EFBFBD><EFBFBD><EFBFBD> 

	ADC_Cmd(ADC1, ENABLE);	//ʹ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ADC1
	
	ADC_ResetCalibration(ADC1);	//ʹ<EFBFBD>ܸ<EFBFBD>λУ׼
    while(ADC_GetResetCalibrationStatus(ADC1));
    ADC_StartCalibration(ADC1);
    while(ADC_GetCalibrationStatus(ADC1));

}				  
//<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ADCֵ
//ch:ͨ<EFBFBD><EFBFBD>ֵ 0~3
u16 Get_Adc(u8 ch)   
{
  	//<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD>ADC<EFBFBD>Ĺ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ͨ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>У<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>
	ADC_RegularChannelConfig(ADC1, ch, 1, ADC_SampleTime_239Cycles5 );	//ADC1,ADCͨ<EFBFBD><EFBFBD>,<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ʱ<EFBFBD><EFBFBD>Ϊ239.5<EFBFBD><EFBFBD><EFBFBD><EFBFBD>	  			    
  
	ADC_SoftwareStartConvCmd(ADC1, ENABLE);		//ʹ<EFBFBD><EFBFBD>ָ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>ADC1<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>	
	 
	while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC ));//<EFBFBD>ȴ<EFBFBD>ת<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>

	return ADC_GetConversionValue(ADC1);	//<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>һ<EFBFBD><EFBFBD>ADC1<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>ת<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
}


u16 Get_Adc_Average(u8 ch,u8 times)
{
	u32 temp_val=0;
	u8 t;
	for(t=0;t<times;t++)
	{
		temp_val+=Get_Adc(ch);
		delay_ms(5);
	}
	return temp_val/times;
}