/****************************************************************************
【文  件  名  稱】ADC.c
【功  能  描  述】三星S3C44B0X板demo程序代碼
【程  序  版  本】2.0
【創(chuàng)建人及創(chuàng)建日期】龔俊//2003-07-02 15:27
【修改人及修改日期】龔俊//2004-2-12 9:18
****************************************************************************/

//***************************************************************************
#include "44b.h"
#include "def.h"
#include "option.h"
#include "utils.h"

/****************************************************************************
【功能說明】模數(shù)轉(zhuǎn)換初始化
****************************************************************************/
void ADC_Init(void)
{
	rCLKCON = rCLKCON | (1<<12);		//控制系統(tǒng)主時鐘進(jìn)入ADC單元模塊
	rADCCON = 0x1|(0<<2);		//ADC轉(zhuǎn)換使能，選擇AIN7
	Delay(100);		//延時若干個100us
	rADCPSR = 10;		//ADC轉(zhuǎn)換頻率為：(int)(MCLK/(2*(rADCPSR+1))/16)

    //printf("ADC Feq = %d(Hz)\n\n",(int)(MCLK_D/(2.*(10+1.))/16.) );
}
//***************************************************************************

/****************************************************************************
【功能說明】ADC某一通道進(jìn)行轉(zhuǎn)換，返回轉(zhuǎn)換的數(shù)據(jù)
****************************************************************************/
unsigned short Read_Adc(unsigned char ch)
{
	int i;
    static int prevCh=-1;

    if(prevCh!=ch)
    {
		rADCCON = 0x1|(ch<<2);		//設(shè)置AD轉(zhuǎn)換通道
   		for(i=0;i<150;i++);		//最小15uS
	}
	
    rADCCON=0x1|(ch<<2);	//開始AD轉(zhuǎn)換
	while(rADCCON & 0x1);	//避免標(biāo)志FLAG錯誤
    while(!(rADCCON & 0x40));		//等待AD轉(zhuǎn)換結(jié)束
	for(i = 0; i < rADCPSR; i++);		//避免第二次標(biāo)志FLAG錯誤
    prevCh=ch;
	return rADCDAT;		//返回AD轉(zhuǎn)換值
}
//***************************************************************************

/****************************************************************************
【功能說明】ADC Test
****************************************************************************/
void ADC_Test(void)
{
    int a0=0,a1=0,a2=0,a3=0,a4=0,a5=0,a6=0,a7=0;

   	printf( "\nADC Test\n" ) ;
   	printf( "Please change R1 and see what happen\n" ) ;
   	printf( "Press ESC key to exit!\n\n" ) ;
   	
   	ADC_Init() ;		//模數(shù)轉(zhuǎn)換初始化
    
    while( !( kbhit && (getkey()==ESC_KEY) ) )
    {
		a0 = Read_Adc(0);		//ADC某一通道進(jìn)行轉(zhuǎn)換，返回轉(zhuǎn)換的數(shù)據(jù)
		a1 = Read_Adc(1);		//ADC某一通道進(jìn)行轉(zhuǎn)換，返回轉(zhuǎn)換的數(shù)據(jù)
		a2 = Read_Adc(2);		//ADC某一通道進(jìn)行轉(zhuǎn)換，返回轉(zhuǎn)換的數(shù)據(jù)
		a3 = Read_Adc(3);		//ADC某一通道進(jìn)行轉(zhuǎn)換，返回轉(zhuǎn)換的數(shù)據(jù)
		a4 = Read_Adc(4);		//ADC某一通道進(jìn)行轉(zhuǎn)換，返回轉(zhuǎn)換的數(shù)據(jù)
		a5 = Read_Adc(5);		//ADC某一通道進(jìn)行轉(zhuǎn)換，返回轉(zhuǎn)換的數(shù)據(jù)
		a6 = Read_Adc(6);		//ADC某一通道進(jìn)行轉(zhuǎn)換，返回轉(zhuǎn)換的數(shù)據(jù)
		a7 = Read_Adc(7);		//ADC某一通道進(jìn)行轉(zhuǎn)換，返回轉(zhuǎn)換的數(shù)據(jù)
		printf("ADC0-7 OUTPUT : (%4d) %4d %4d %4d %4d %4d %4d %4d\n",a0,a1,a2,a3,a4,a5,a6,a7);
		
		Delay(400);		//延時
    }
    
    printf( "\n" ) ;
}
//***************************************************************************