lcd.rar_AT89C51 LCD_at89c51 1602汇编

/*实验名称：字符型LCD接口实验 功能：在LCD上显示 AT89S51 DEMO www.mcuprog.com 作者：http://www.mcuprog.com 05-02-01 */ #include <reg51.h> sbit E=P3^5; sbit RW=P3^6; sbit RS=P3^7; typedef unsigned char uchar; //------------------------------------- void Delay(unsigned int t) // delay 40us { for(;t!=0;t--) ; } //============================================= void SendCommandByte(unsigned char ch) { RS=0; RW=0; P0=ch; E=1; Delay(1); E=0; Delay(100); //delay 40us } //------------------------------------------------------- void SendDataByte(unsigned char ch) { RS=1; RW=0; P0=ch; E=1; Delay(1); E=0; Delay(100); //delay 40us } //------------------------------------------------- void InitLcd() {SendCommandByte(0x30); SendCommandByte(0x30); SendCommandByte(0x30); SendCommandByte(0x38); //设置工作方式 SendCommandByte(0x0c); //显示状态设置 SendCommandByte(0x01); //清屏 SendCommandByte(0x06); //输入方式设置 } //============================================= void DisplayMsg1(uchar *p) { unsigned char count; SendCommandByte(0x80); //设置DDRAM地址 for(count=0;count<16;count++) {SendDataByte(*p++); } } //============================================= void DisplayMsg2(uchar *p) { unsigned char count; SendCommandByte(0xc0); //设置DDRAM地址 for(count=0;count<16;count++) {SendDataByte(*p++); } } //============================================= main() {char msg1[16]=" AT89S51 DEMO "; char msg2[16]="www.mcuprog.com "; InitLcd(); DisplayMsg1(msg1); DisplayMsg2(msg2); while(1); }