c8051f020例程

c8051f020的学习例程，c8051f020学习必备！！！

#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；定时器3溢出ADC0转换开始；ADC0转换数据右对齐
	REF0CN=0x07;		//使能温度传感器，片内VREF，和VREF输出缓冲器
	AMX0SL=0x00;		//选择AIN0作为ADC多路转换输出
	ADC0CF=（SYSCLK/2500000）<<3;		//ADC转换时钟2.5MHZ
	ADC0CF&=~0x07;		//PGA增益=1
	EIE2&=~0x02;		//禁止ADC0中断
	AD0EN=1;			//使能ADC0
}


void Timer3Init（int counts）
{
	TMR3CN=0x02;		//停止定时器3；清除TF3；使用系统时钟作为时基
	TMR3RL=-counts;		//初始化重装值
	TMR3=0xffff;		//立即开始重装
	EIE2&=~0x01;		//禁止定时器3中断
	TMR3CN|=0x04;		//启动定时器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转换结束标志
	sample[i]=ADC0;	//读和存储ADC0值
	i++;
	if（i==5）
		{
		flag=1;
		i=0;
		EIE2&=~0x02;
		}
}

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件     869702  2009-08-17 20:24  c8051f020例程\020应用笔记.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

............此处省略246个文件信息