ldy.h

LCD显示 在液晶屏上显示文字 51单片机应用

//定义单片机端口地址
#pragma small
sfr SP=0x81;
sfr DPL=0x82;
sfr DPH=0x83;
sfr PCON=0x87;
sfr TCON=0x88;
sfr TMOD=0x89;
sfr TL0=0x8a;
sfr TL1=0x8b;
sfr TH0=0x8c;
sfr TH1=0x8d;
sfr P1=0x90;
sfr P0=0x80;
sfr P2=0xa0;
sfr SCON=0x98;
sfr SBUF=0x99;
sfr IE=0xa8;
sfr P3=0xb0;
sfr IP=0xb8;
sfr PSW=0xd0;
sfr ACC=0xe0;
sfr B=0xf0;
sbit P37=0xb7;
sbit P36=0xb6;
sbit P35=0xb5;
sbit P34=0xb4;
sbit P33=0xb3;
sbit P32=0xb2;
sbit P31=0xb1;
sbit P30=0xb0;
sbit CY=PSW^7;  //0xd7; PSW=0xd0
sbit P17=0x97;
sbit P16=0x96;
sbit P15=0x95;
sbit P14=0x94;
sbit P13=0x93;
sbit P12=0x92;
sbit P11=0x91;
sbit P10=0x90;
sbit P07=0x87;
sbit P06=0x86;
sbit P05=0x85;
sbit P04=0x84;
sbit P03=0x83;
sbit P02=0x82;
sbit P01=0x81;
sbit P00=0x80;
sbit P27=0xa7;
sbit P26=0xa6;
sbit P25=0xa5;
sbit P24=0xa4;
sbit P23=0xa3;
sbit P22=0xa2;
sbit P21=0xa1;
sbit P20=0xa0;