带中文字库12864LCD显示程序.docVIP

//带中文字库的12864LCD显示程序#include reg52.H#include intrins.H #define uchar unsigned char#define uint unsigned int sbit dula = P2^6;sbit wela = P2^7;//SCM12864-05端口定义#define LCD_DATA P0 //数据口sbit RS = P3^5; //并行的指令/数据选择信号, H数据, L命令sbit RW = P3^6; //并行读写选择信号, H读, L写sbit E = P3^4; //并行使能端, H有效, L无效sbit PSB = P3^7; //并/串接口选择, H并,L串sbit RET = P3^3; //复位, L有效 uchar code datas1[] = {广东工业大学};uchar code datas2[] = {自动化学院2004级};uchar code datas3[] = {网络工程 (4)班};uchar code datas4[] = {fengmk2@}; //延时约2usvoid delayUs(){nop_();_nop_();}//延时 a * 1msvoid delayMs(uint a){??? uint i, j;??? for(i = a; i 0; i--)??????? for(j = 100; j 0; j--);} //检测LCD是否处于忙状态, 若忙返回1, 空闲返回0bit checkBusy(){ bit busy;??? RS = 0;??? RW = 1;??? E = 1;??? delayUs();??? busy = (bit)(LCD_DATA0x80);??? E = 0;??? return busy;} //等待LCD到空闲void wait(){??? while(checkBusy());} //写命令void writeCmd(uchar cmd){??? wait();??? RS = 0;??? RW = 0;??? E = 0;??? delayUs();??? LCD_DATA = cmd;??? delayUs();??? E = 1;??? delayUs();??? E = 0;} //写数据void writeData(uchar dat){??? wait();??? RS = 1;??? RW = 0;??? E = 0;??? delayUs();??? LCD_DATA = dat;??? delayUs();??? E = 1;??? delayUs();??? E = 0;} //初始化LCDvoid init(){??? PSB = 1; //并口方式??? writeCmd(0x30); //基本指令, 扩充指令为34H??? delayMs(10);??? writeCmd(0x0c); //显示开, 关光标??? delayMs(10);??? writeCmd(0x01); //清屏??? delayMs(10);} void setPosition(uchar x, uchar y){ uchar p;??? switch(x%4)??? {??????? case 0: p = 0x80; break; //第一行开始地址??????? case 1: p = 0x90; break; //第二行??????? case 2: p = 0x88; break; //第三行??????? case 3: p = 0x98; break; //第四行??? }??? p += y;??? writeCmd(p);} void writeString(uchar * str){ uchar i = 0;??? while(str[i] != \0)??? {??????? writeData(str[i++]);??? }} /**//***************************LCD12864***************************/ void main(){//先关闭数码管, 使两个锁存器锁存, 因开了数码管, USB电压驱动不够, 将无法使LCD正常工作??? dula = wela = 0;??? init();??? setPosition(0, 0);??? writeString(datas1);??? se