lcdbase.c

Mp3的设计方案

#include "c51core.h"
#include "compiler.h"
#include "intrins.h"

#define  LCDPORT P4
#define  nop  _nop_

uchar code CH[]="播放器测试程试";

sbit CS1=P1^7;
sbit CS2=P1^6;
sbit LA0=P1^4;
sbit LRW=P1^5;

sbit LCDRS=P1^7;
sbit LCDRW=P1^6;
sbit LCDEN=P1^4;



void delay(uint time)
{uchar i;
 for(i=0;i<time;i++);}

void LcdWrite(bit rd,uchar lcddata)
{LCDRS=rd;
 LCDRW=0;
 LCDEN=1;
 LCDPORT=lcddata;
 delay(50);
 LCDEN=0;
}
 
uchar LcdRead(void)
{uchar lcddata;
 LCDRS=0;
 LCDRW=1;
 LCDEN=1;
 lcddata=LCDPORT;
 delay(50);
 LCDEN=0;
 return(lcddata);
}

void ReadBusy()
{uchar busy;
 do{busy=LcdRead();}while(busy&0x80);
 }

void LcdWriteCH(uchar pos,uchar data1,uchar data2)
{ReadBusy();
 LcdWrite(0,pos);
 ReadBusy();
 LcdWrite(1,data1);
 ReadBusy();
 LcdWrite(1,data2);
}


void inilcd(void)

{LcdWrite(0,0x30);
 LcdWrite(0,0x04);
 ReadBusy();
 LcdWrite(0,0x0f);
 ReadBusy();
 LcdWrite(0,0x01);
 ReadBusy();
 LcdWrite(0,0x02);
}