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 #include<reg51.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
/***************引脚声明*********************/
#define lcd P0
sbit rs=P2^7;	  //LCD液晶控制端
sbit en=P2^6;
sbit SPK=P1^7;  //蜂鸣器引脚
sbit CS=P1^2;   //将CS位定义为P1.2引脚
sbit CLK=P1^0;  //将CLK位定义为P1.0引脚
sbit DIO=P1^1;  //将DIO位定义为P1.1引脚
sbit key=P2^5;  //定义按键引脚
sbit a=P2^0;		//模拟量通道选择端
sbit b=P2^1;		//模拟量通道选择端
sbit c=P2^2;		//模拟量通道选择端
sbit LED = P3^7;
sbit LED1 = P3^6;

/***********LCD显示数组**************************/

uchar table1[]="V=0.00V";
uchar table3[]="I=0.00A";
uchar table5[]="PO=000%";

/***************全局变量************************/
uchar flag=0;      //换挡标志位


void delay(uint count)		 //延时
{
  uint i,j;