12864液晶显示C程序代码

//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[] = {"陕西科技大学"}; uchar code datas2[] = {"自动化0601班"}; uchar code datas3[] = {"高张宋黄"}; uchar code datas4[] = {"09电子设计大赛"}; void 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0 bit checkBusy() { bit busy; RS = 0; RW = 1; E = 1; delayMs(1); busy = (bit)(LCD_DATA&0x80); E = 0; return busy; } void write(uchar cmd,bit way) //way:0写命令，1写数据 { while(checkBusy()); RS = way; RW =0; E = 0; delayMs(1); LCD_DATA = cmd; delayMs(1); E = 1; delayMs(1); E = 0; } //初始化LCD void init() { PSB = 1; //并口方式 write(0x30,0); //基本指令, 扩充指令为34H delayMs(10); write(0x0c,0); //显示开, 关光标 delayMs(10); write(0x01,0); //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; write(p,0); } void writeString(uchar * str) { uchar i = 0; while(str[i] != '\0') { write(str[i++],1); } } /**//***************************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); setPosition(1, 0); writeString(datas2); setPosition(2, 0); writeString(datas3); setPosition(3, 0); writeString(datas4); while(1); }