#include“c8051f020.h“
#include“intrins.h“


#define?SYSCLK?		22118400
#define?SAMPLERATE	5000


unsigned??sum=0;
float?vc;
xdata?unsigned?sample[5];
unsigned?char?flag=0;

void?SysclkInit（void）
{

	unsigned?int?i;

	OSCXCN=0x67;

	for（i=0;i<256;i++）;
	while（!（OSCXCN&0x80））;

	OSCICN=0x88;

}






void?ADC0Init（void）
{
	ADC0CN=0x04;		//ADC0禁止；正常工作模式；定時器3溢出ADC0轉(zhuǎn)換開始；ADC0轉(zhuǎn)換數(shù)據(jù)右對齊
	REF0CN=0x07;		//使能溫度傳感器，片內(nèi)VREF，和VREF輸出緩沖器
	AMX0SL=0x00;		//選擇AIN0作為ADC多路轉(zhuǎn)換輸出
	ADC0CF=（SYSCLK/2500000）<<3;		//ADC轉(zhuǎn)換時鐘2.5MHZ
	ADC0CF&=~0x07;		//PGA增益=1
	EIE2&=~0x02;		//禁止ADC0中斷
	AD0EN=1;			//使能ADC0
}


void?Timer3Init（int?counts）
{
	TMR3CN=0x02;		//停止定時器3；清除TF3；使用系統(tǒng)時鐘作為時基
	TMR3RL=-counts;		//初始化重裝值
	TMR3=0xffff;		//立即開始重裝
	EIE2&=~0x01;		//禁止定時器3中斷
	TMR3CN|=0x04;		//啟動定時器3

}





void?main（void）
{
	unsigned?char?j;


	WDTCN=0xde;
	WDTCN=0xad;

	SysclkInit（）;

//	PortInit（）;
	Timer3Init（SYSCLK/SAMPLERATE）;
	ADC0Init（）;
	ADC0CN|=0x80;
	EA=1;
	EIE2|=0x02;
	while（1）
		{
		if（flag）
			{
			flag=0;
			for（j=0;j<5;j++）
				sum=sum+sample[j];
			sum=sum/5;
			vc=（（float）sum/4096）*2.50;
			}
		_nop_（）;
		}
	

}

void?ADC0_ISR（void）?interrupt?15?using?3
{

	static?unsigned?char?i=0;
	AD0INT=0;		//清除ADC0轉(zhuǎn)換結(jié)束標(biāo)志
	sample[i]=ADC0;	//讀和存儲ADC0值
	i++;
	if（i==5）
		{
		flag=1;
		i=0;
		EIE2&=~0x02;
		}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????869702??2009-08-17?20:24??c8051f020例程\020應(yīng)用筆記.pdf

?????文件???????6134??2009-08-19?13:59??c8051f020例程\ADC0\ADC0

?????文件???????1515??2009-08-17?10:19??c8051f020例程\ADC0\ADC0.c

?????文件???????3138??2009-08-19?13:59??c8051f020例程\ADC0\ADC0.hex

?????文件????????103??2009-08-19?13:59??c8051f020例程\ADC0\ADC0.lnp

?????文件???????4692??2009-08-19?13:59??c8051f020例程\ADC0\ADC0.LST

?????文件???????9485??2009-08-19?13:59??c8051f020例程\ADC0\ADC0.M51

?????文件???????5185??2009-08-19?13:59??c8051f020例程\ADC0\ADC0.OBJ

?????文件???????2909??2009-08-26?09:33??c8051f020例程\ADC0\ADC0.Opt

?????文件????????187??2009-08-26?09:33??c8051f020例程\ADC0\ADC0.plg

?????文件???????2155??2009-08-15?15:58??c8051f020例程\ADC0\ADC0.Uv2

?????文件???????2911??2009-08-19?14:00??c8051f020例程\ADC0\ADC0_Opt.Bak

?????文件???????2134??2009-08-15?15:26??c8051f020例程\ADC0\ADC0_Uv2.Bak

?????文件??????16700??2009-07-25?12:04??c8051f020例程\ADC0\c8051F020.h

?????文件????????603??2009-07-22?15:20??c8051f020例程\ADC0\LedShow.c

?????文件???????2337??2009-07-22?15:42??c8051f020例程\ADC0\LedShow.LST

?????文件???????2794??2009-07-22?15:42??c8051f020例程\ADC0\LedShow.OBJ

?????文件?????????32??2009-07-25?08:12??c8051f020例程\ADC0\my.h

?????文件???????5115??2002-04-16?15:32??c8051f020例程\ADC0\STARTUP.A51

?????文件??????11674??2009-08-19?13:59??c8051f020例程\ADC0\STARTUP.LST

?????文件????????749??2009-08-19?13:59??c8051f020例程\ADC0\STARTUP.OBJ

?????文件???????1034??2009-07-25?08:49??c8051f020例程\ADC0\UART0.c

?????文件???????2433??2009-07-25?12:06??c8051f020例程\ADC0\UART0.LST

?????文件???????1477??2009-07-25?12:06??c8051f020例程\ADC0\UART0.OBJ

?????文件??????10885??2001-09-03?19:14??c8051f020例程\ADC0_Buf1\ADC0_Buf1.c

?????文件???????9802??2001-09-03?19:13??c8051f020例程\ADC0_Int1\ADC0_Int1.c

?????文件??????10368??2001-09-03?19:16??c8051f020例程\ADC0_Int2m\ADC0_Int2m.c

?????文件??????10893??2001-09-03?19:21??c8051f020例程\ADC0_OSA1\ADC0_OSA1.c

?????文件???????8122??2001-09-04?11:02??c8051f020例程\ADC0_Poll1\ADC0_Poll1.c

?????文件?????100261??2009-08-10?15:33??c8051f020例程\an022.pdf

............此處省略246個文件信息