實驗原理圖

實驗程序

#includereg51.h>

#includestdio.h>

#includestdlib.h>

#includeintrins.h>

#includeabsacc.h>

#define busy 0x80 //用于檢測LCD 狀態(tài)字中的Busy 標識

#define RSaddr 0x1000

#define RWaddr 0x2000

#define CSaddr 0x0400

#define adtn 0xc8ff

#define wc 0xcfff

#define wd 0xdfff

#define rc 0xefff

unsigned char code homepage[] = {www.ispdown.com};

unsigned char code email[] = {ispdown@21cn.com};

//5ms 延時

void delay5ms(void)

{

unsigned int TempCyc = 5552;

while(TempCyc--);

}

//----------------------------------

//400ms 延時

void delay400ms(void)

{

unsigned char TempCycA = 5;

unsigned int TempCycB;

while(TempCycA--)

{

TempCycB=7269;

while(TempCycB--);

};

}

//--------------------------------

void waitLcd()

{

char temp;

bit flag=1;

while(flag==1)

{

//temp=XBYTE[CSaddr+RWaddr+adtn];

temp=XBYTE[rc];

if (temp>>7==0) flag=0;

P1=temp;

}

P1=0xff;

}

//---------------------------------

void WC_Lcd(bit isCheck,char c)

{

if (isCheck==1) waitLcd();

//XBYTE[CSaddr+adtn]=c;

XBYTE[wc]=c;

}

//--------------------------------

void WD_Lcd(char c)

{

waitLcd();

//XBYTE[CSaddr+RSaddr+adtn]=c;

XBYTE[wd]=c;

}

//----------------------------------

void LcdInit()

{

delay5ms();