main.c

《Proteus在MCS-51&ARM7系统中的应用百例》逆向之 Chapter 7 《Proteus在MCS-51&ARM7系统中的应用百例》MCS-51例子的C语言版本。

#include <reg51.h>
typedef unsigned char BYTE;

BYTE LED_0;
BYTE LED_1;
BYTE LED_2;
BYTE ADC  ;

sbit P21=P2^1;
sbit P22=P2^2;
sbit P23=P2^3;

sbit CLOCK=P2^4;
sbit ST   =P2^5;
sbit EOC  =P2^6;
sbit OE   =P2^7;


BYTE code TABLE[]={	0x3F,0x06,0x5B,0x4F,0x66,
				 	0x6D,0x7D,0x07,0x7F,0x6F};


void INT_T0() interrupt 1
{
	CLOCK=~CLOCK;	
}

void delay()
{
	BYTE i=10;
	
	do
	{
		BYTE j=250;
		do
		{}while(--j);
	}while(--i); 	
}

void DISP()
{
	BYTE temp;
	
	temp=TABLE[LED_0];
	P23=0;
	P0=temp;
	delay();
	P23=1;

	temp=TABLE[LED_1];
	P22=0;
	P0=temp;
	delay();
	P22=1;

	temp=TABLE[LED_2];
	P21=0;
	P0=temp;
	delay();
	P21=1;
			
}


main()
{
	LED_0=0;
	LED_1=0;
	LED_2=0;

	TMOD=0x02;
	TH0=245;
	TL0=0;
	IE=0x82;
	TR0=1;

	while(1)
	{
		ST=0;
		ST=1;
		ST=0;
		while(!EOC);
		OE=1;
		ADC=P1;
		OE=0;
		LED_2=ADC/100;
		LED_1=(ADC%100)/10;
		LED_0=(ADC%100)%10;
		DISP();	
	}
}