LCD1602的主控芯片是HD44780或者其它兼容芯片。
与此相仿的是LCD12864液晶显示器，它是一种图形点阵显示器，能显示的内容比LCD1602要丰富得多，除了普通字符外，还可以显示点阵图案，带有汉字库的还可以显示汉字，它的并行驱动方式与LCD1602相差无几，所以，在这里花点时间是值得的。
//File1#ifndef __ZHANGTYPE_H__#define __ZHANGTYPE_H__#define uint8 unsigned char#define uint16 unsigned short int#define uint32 unsigned long int#define int8 signed char#define int16 signed short int#define int32 signed long int#define uint64 unsigned long long int#define int64 signed long long int#endif//File2#ifndef __FUN_H__#define __FUN_H__#include "ZhangType.h"#includevoid Delay(uint16 time);#endif//File3#include "fun.h"void Delay(uint16 time){ while(time--);}//File4#ifndef __1602_H__#define __1602_H__#include#include "ZhangType.h" //变量类型#include "fun.h" //常用函数 #define SETMODE 0x38 //16*2显示,5*7点阵,8位数据接口#define DISOPEN 0x0C //显示开,不显示光标,光标不闪烁#define DISMODE 0x06 //读写字符后地址加1,屏显不移动#define SETADDR 0x80 //设置数据地址指针初始值#define CLEAR 0x01 //清屏,数据指针清零#define RET 0x02 //回车,数据指针清零#define PORT P2 //I/O口sbit RS = P1^0;sbit RW = P1^1;sbit E = P1^2;void Init1602(void); //初始化1602void Write1602_Com(uint8 com); //写命令void Write1602_Dat(uint8 dat); //写数据void CheckBusy(void); //检查忙void Write1602_One_Dat(uint8 X,uint8 Y,uint8 dat);//写一个数据void Write1602_Str(uint8 addr,uint8 length,uint8 *pbuf);//写一个数据串#endif////File5#include "1602.h"void Write1602_Com(uint8 com){ E=0; RS=0; //命令 Delay(50); //延时 RW=0; //写 Delay(50); PORT=com; //端口赋值 Delay(50); E=1; //高脉冲 Delay(50); E=0;}void Write1602_Dat(uint8 dat){ E=0; RS=1; //数据 Delay(50); //延时 RW=0; //写 Delay(50); PORT=dat; //端口赋值 Delay(50); E=1; //高脉冲 Delay(50); E=0;}void CheckBusy(void){ uint8 temp; RS=0; //命令 RW=1; //读 E=0; while(1) { PORT=0xFF; //端口为输入 E=1; //高脉冲 temp=PORT; E=0; if ((temp&0x80)==0) //检查BF位是否为0 break; }}void Init1602(void){ Write1602_Com(SETMODE); //模式设置 Delay(500); Write1602_Com(DISOPEN); //显示设置 Delay(500); Write1602_Com(DISMODE); //显示模式 Delay(500); Write1602_Com(CLEAR); //清屏 Delay(500);}void Write1602_One_Dat(uint8 x,uint8 y,uint8 dat){ x&=0x0f; y&=0x01; if(y) x|=0x40; x|=0x80; Write1602_Com(x); Write1602_Dat(dat);}void Write1602_Str(uint8 addr,uint8 length,uint8 *pbuf){ uint8 i; Write1602_Com(addr); for(i=0;i { Write1602_Dat(pbuf[i]); }}//File6/********************************************************名称:主文件(_main.c)*功能:测试*日期:2014/09/09*******************************************************/#include "1602.h"#include "fun.h" uint8 code hot[8]={ //摄氏温度字模0x10,0x06,0x09,0x08,0x08,0x09,0x06,0x00};uint8 code pi[8]={0x00,0x1f,0x0a,0x0a,0x0a,0x13,0x00,0x00 //pai};uint8 code strMCU[]="I love MCU!";uint8 code strTest[]="LCD1602 Test!";uint8 code blog[]="Welcome to my blog!";uint8 i;void main(){ Init1602(); //初始化1602 //自定义CGRAM Write1602_Str(0x40,8,hot); //摄氏温标 Write1602_Str(0x48,8,pi); //pai Write1602_Str(0x80,strlen(strMCU),strMCU); //"I love MCU!" Write1602_Str(0x80+0x40,strlen(strTest),strTest); //"LCD1602 Test!" for(i=0;i<50;i++) //延时一段时间 Delay(10000); Write1602_Com(CLEAR); //指令执行时间较长 Delay(500); //多加一些延时 for(i=0;i<16;i++) Write1602_Dat(0); Write1602_Com(0xc0); //设置DDRAM地址 for(i=0;i<16;i++) Write1602_Dat(1); for(i=0;i<50;i++) //延时一段时间 Delay(10000); Write1602_Com(CLEAR); //指令执行时间较长 Delay(500); //多加一些延时 Write1602_Str(0x80+0x10,strlen(blog),blog); //写在显示之外 while(1) { Write1602_Com(0x18); //左移 for(i=0;i<20;i++) //延时 Delay(10000); }}
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