main.c

《Proteus在MCS-51&ARM7系统中的应用百例》逆向之 Chapter 5 《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 COUNT;
BYTE FLASH; 

sbit P10=P1^0;
sbit P11=P1^1;
sbit P12=P1^2;
sbit P13=P1^3;

void INT_T0()	interrupt 1
{
	switch(COUNT)
	{
		case 0x00: {
						P10=~P10;
						FLASH++;
				
						if(FLASH==40)
						{
							FLASH=0x00;
							COUNT++;
							break;
						}
						break;
				 	}

		case 0x01:	{
						P11=~P11;
						FLASH++;
				
						if(FLASH==40)
						{
							FLASH=0x00;
							COUNT++;
							break;
						}
						break;
					}
		case 0x02:	{
						P12=~P12;
						FLASH++;
				
						if(FLASH==40)
						{
							FLASH=0x00;
							COUNT++;
							break;
						}
						break; 	
					}
		case 0x03:	{
						P13=~P13;
						FLASH++;
				
						if(FLASH==40)
						{
							FLASH=0x00;
							COUNT=0x00;
							break;
						}
						break;
					}

		default:	break;  	
	}
	
	
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
} 


main()
{
	COUNT=0x00;
	FLASH=0x00;
	TMOD=0x01;
	TH0=(65536-50000)/256;
	TL0=(65536-50000)%256;
	IE=0x82;
	TR0=1;
	while(1);
}