////////////mylcd.h//////////////
#include "C8051F040.h"	// Register definition file.
typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;
#define toup sendc(0x14)  //lcd光標右移
#define todown sendc(0x10)//lcd光標左移
#define curshow sendc(0x0f)//顯示光標
#define home sendc(0x02)//移到首行
#define cls sendc(0x01)//清屏
sbit lcdrs=P5^2;//硬件控制接口
sbit lcdrw=P5^1;
sbit lcdcs=P5^0;
void delay1ms(uint time){//延遲1ms*time,這不是一個精確值
	uint i;
	uint j;
	for (i=0;i<time;i++){
		for(j=0;j<300;j++);
	}
}	
void sendc(uchar c){//給lcd送命令
	SFRPAGE = 0x0f;//以下實際上是對lcd發送命令的時序圖進行操作的
	P4=c;
	lcdrs=0;
	lcdrw=0;
	EA=0;
	lcdcs=1;
	lcdcs=0;
	lcdcs=1;
	lcdrw=1;
	P4=0xff;//先置1，后讀取
	lcdrs=0;
	while(P4>=0x80);
	lcdcs=0;
	lcdcs=1;
	EA=1;
	if(c==1)
		delay1ms(2);
                
}
void sendd(uchar c){//給lcd送數據
	SFRPAGE = 0x0f;
	EA=0;
	P4=c;
	lcdrs=1;
	lcdrw=0;
	lcdcs=1;
	lcdcs=0;
	lcdcs=1;
	lcdrw=1;
	P4=0xff;//先置1，后讀取
	lcdrs=0;
	while(P4>=0x80);
	lcdcs=0;
	lcdcs=1;
	EA=1;
}	
uchar readd(){//給顯示lcd送顯示字符
	uchar k;
	SFRPAGE = 0x0f;
	EA=0;
	lcdrw=1;
	P4=0xff;
	lcdrs=1;
	k=P4;
	lcdcs=0;
	lcdcs=1;
	P4=0xff;//先置1，后讀取，否則所讀數據可能有誤
	lcdrs=0;
	while(P4>=0x80);//讀LCD是否為忙
	lcdcs=0;
	lcdcs=1;
	EA=1;
	return k;
}