main.c

15寸

#include <at89x52.h>

#define address 0x0aa
#define power 0x0fe
#define menu 0x0f8
#define up 0x0fd
#define enter 0x0fb
#define down 0x0fc


void clsconnect_key(void);
void power_key(void);
void manu_key(void);
void up_key(void);
void down_key(void);
void enter_key(void);
void init(void);
void delay(unsigned char t);

bit interruptFlag,flag = 0;
unsigned char command,recommand;


main()
{
	init();
	while(1)
	{

	if(interruptFlag==1)
		{
			interruptFlag=0;
			if(SM2)
			{
				if(command==address)
				{
					SM2=0;
					recommand = address;					
					TB8 = 1;
					SBUF = recommand;
					while(~TI){}
					P2 = 0xff;				   //led
				}
				TI = 0;
				RI = 0;
				EA = 1;
				REN = 1;
			}


			else
			{
				if(RB8)
				{
					if(command == address)
					{
						clsconnect_key();
						TB8 = 1;
						SBUF = recommand;
						while(~TI){}
					}
					REN= 1;
					TI = 0;
					RI = 0;
					EA = 1;
				}
				else  
				{
					switch(command)
					{
						case power :
						power_key()	;break;				
						case menu :
						manu_key()	;break;				
						case up :
						up_key()	;break; 				
						case down : 
						down_key()	;break;				
						case enter :
						enter_key()	;break;



					}						
					if(flag == 1)
					{
						flag = 0;
						TB8 = 1 ;
						SBUF = recommand;
						while(~TI){}
						TI = 0;
						RI = 0;

						EA = 1;
						REN = 1;
					}
				}

			}
		}
	}	

}

void clsconnect_key()
{
	P2 = 0xdf;
	recommand=command ;

}

void power_key()
{
	P2 = 0xfe;
	recommand=command ;
	flag = 1;
	delay(255);
	P2 = 0xff;
}

void manu_key()
{
	P2 = 0xf7 ;
	recommand=command ;
	flag = 1;
	delay(255);
	P2 = 0xff;
}


void up_key()
{
	P2 = 0xfb ;
	recommand=command ;
	flag = 1;
	delay(255);
	P2 = 0xff;
}


void down_key()
{
	P2 = 0xfd ;
	recommand=command ;
	flag = 1;
	delay(255);
	P2 = 0xff;
}

void enter_key()
{
	P2 = 0xef;
	recommand=command ;
	flag = 1;
	delay(255);
	P2 = 0xff;
}

void serial(void) interrupt 4 using 1
{
	EA=0;
	
	REN=0;

	command = SBUF;
	interruptFlag = 1;
	RI=0;
}

void init()
{
	P2 = 0xff;
	interruptFlag=0;
	TI = 0;	
	SCON  = 0x0f0;                      /* mode 1: 8-bit UART, enable receiver   */
    TMOD  = 0x20;                      /* timer 1 mode 2: 8-Bit reload          */
	TH1   = 0x0f3;                      /* reload value 2400 baud                */
    TL1	  = 0x0f3;
	PCON  = 0x00;
	TR1   = 1;                         /* timer 1 run                           */
	TB8   = 1;
	ES    = 1;
	EA	  = 1;	
}

void delay(unsigned char t)
{
	unsigned char i , j;
	for(i = 0;i < t;i ++)
	{
		for(j = 0; j < 180 ; j++)
		{}
	}
}