液晶显示屏.c

刚学时编的小程序

#include<AT89X51.H>
#include<INTRINS.H>

sbit RS=P0^0;
sbit RW=P0^1;
sbit E=P0^2;
sbit PSB=P0^3;
sbit RST=P0^4;
sbit b=P1^7;              //忙标志位
										   
unsigned char c;	
			   
unsigned char a[]= {0xa2,0xd9,0xa2,0xda,0xbe,0xa7};

 busy()
{
	P1=0xff;
	RS=0;
	RW=1;
	E=1;
	while(b==1);
	E=0;
}

SEND_I(unsigned char A)
{
	busy();
	RS=0;
	RW=0;
	P1=A;
	E=1;
	_nop_();
	_nop_();
	E=0;
}

SEND_D(unsigned char A)
{
	busy();
	RS=1;
	RW=0                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     ;
	P1=A;
	E=1;
	_nop_();
	_nop_();
	E=0;
}

READ_D(unsigned char A)
{
	busy();
	RS=1;
	RW=1;
	E=1;
	_nop_();
	A=P1;
	_nop_();
	E=0;
}

void Print(unsigned char *str)
{
	while(*str!='\0')
	{
		SEND_D(*str);
		str++;
	}
}

chushi()
{
	RST=1;
	PSB=1;
	SEND_I(0x34);
	SEND_I(0x30);
	SEND_I(0x01);
	SEND_I(0x06);
	SEND_I(0x0c);
}

main()
{
   chushi();
   SEND_I(0x80);
   Print("液晶显示屏液晶显示屏");
   Print("显示程序");
   Print("~!@#$%^&*()_+|{}");
   while(a[c]!=0)
   {
	   SEND_D(a[c]);
	   c++;
   }
}