/***********************************************************************

工    程：ST7920驅(qū)動(dòng)的12864液晶的3線串行驅(qū)動(dòng)模式

引腳定義：RS(CS)=====>  PD3   //PB0

    RW(SID)====> PD4     //PB1

          EN(SCLK)===>   PD6//   PB2

    PSB為硬件控制，接高電平為8位或4位的并行模式，接低電平為串行模式

************************************************************************/

#include

#include

#define uchar unsigned char

#define uint unsigned int 

#define nop()  NOP()

#define xtal 8

#define Set_CS() DDRD |= (1<<3);PORTD |= (1<<3)

#define Set_SID() DDRD |= (1<<4);PORTD |= (1<<4)

#define Set_SCLK() DDRD |= (1<<6);PORTD |= (1<<6)

#define Clr_CS() DDRD |= (1<<3);PORTD &=~(1<<3)

#define Clr_SID() DDRD |= (1<<4);PORTD &=~(1<<4)

#define Clr_SCLK() DDRD |= (1<<6);PORTD &=~(1<<6)

//====================================================================

//函數(shù)聲明

void Delay(uint ms);      //延時(shí)子程序

void W_1byte(uchar RW, uchar RS, uchar W_data);

void Write_8bits(uint W_bits);

void LCD_Init(void);

/********************************************************************

********************************************************************/ 

//===================================================================

const uchar mynew1[]={"歡迎你來到我的家"};

const uchar mynew2[]={"Create by:LQG  "};

const uchar mynew3[]={"海內(nèi)存知己"};

const uchar mynew4[]={"天涯若比鄰"};

/********************************************************************

********************************************************************/

void main()

{ uchar i = 0;

DDRD &= ~BIT(7);

PORTD &= ~BIT(7);

DDRC |=BIT(6);

PORTC &= ~BIT(6);

DDRC &= ~BIT(7);

PORTC &= ~BIT(7);

Clr_CS();

Clr_SID();

Clr_SCLK();

LCD_Init();

while(1)

{ 

  nop();

  nop();

  W_1byte(0,0,0x80);   //顯示的地址0x80

  nop();

  for(i=0;mynew1[ i]!='