LCD1602控制总线模式

源程序如下，可以对比时序方式，理解总线的操作方法。#includereg51.h>//#includeabsacc.h>#define uchar unsigned char#define uint unsigned int #define busy 0x80uchar xdata LCMWriteCOM _at_ 0x80ff; //写指令寄存器uchar xdata LCMReadCOM _at_ 0xa0ff ; //读指令寄存器uchar xdata LCMWriteData _at_ 0xc0ff ; //写数据寄存器uchar xdata LCMReadData _at_ 0xe0ff ; //读数据寄存器uchar data LCMLineOne[16]="Welcome"; //第一行显示的数据uchar data LCMLineTwo[16]="Happy day"; //第二行显示的数据void Delayms(uchar ms){uchar i,j;for(i=0;ims;i++)for(j=0;j57;j++);}//写指令寄存器void LCMWriteC(uchar COMData){ uchar LCMStatus;do{LCMStatus=(LCMReadCOMbusy); }while(LCMStatus!=0);LCMWriteCOM=COMData;}//读指令寄存器uchar LCMReadC(){uchar LCMStatus;do{LCMStatus=(LCMReadCOMbusy); }while(LCMStatus!=0);LCMStatus=LCMReadCOM;return(LCMStatus);}//读数据寄存器uchar LCMReadD(uchar addr){uchar LCMStatus;do{LCMStatus=(LCMReadCOMbusy); }while(LCMStatus!=0);LCMWriteC(0x80+addr);LCMStatus=LCMReadData;return(LCMStatus);}//写数据寄存器带地址void LCMWriteDAdd(uchar addr,uchar LCMData){uchar LCMStatus;do{LCMStatus=(LCMReadCOMbusy); }while(LCMStatus!=0);LCMWriteC(0x80+addr);LCMWriteData=LCMData;}//写数据寄存器无地址void LCMWriteD(uchar LCMData){uchar LCMStatus;do{LCMStatus=(LCMReadCOMbusy); }while(LCMStatus!=0);LCMWriteData=LCMData;}//初始化void LCMInit(void){ Delayms(15);LCMWriteCOM=0x38;Delayms(5);LCMWriteCOM=0x38;Delayms(5);LCMWriteCOM=0x38;Delayms(5);LCMWriteC(0x38);LCMWriteC(0x08);LCMWriteC(0x01);LCMWriteC(0x06);LCMWriteC(0x0c);}main(){ uchar i;LCMInit();while(1){ LCMWriteC(0x80); //第一行开始地址for(i=0;i16;i++)LCMWriteD(LCMLineOne[i]);LCMWriteC(0x80+0x40); //第二行开始地址for(i=0;i16;i++)LCMWriteD(LCMLineTwo[i]);}}