单片机源程序如下:

//12864并行接口参考程序，控制器st7920

#include "reg52.h"

#include "Lcd12864.h"

#include "Key.h"

#define uchar unsigned char

#define uint unsigned int

static unsigned long Seed = 1;

#define A 48271L

#define M 2147483647L

#define Q (M / A)

#define R (M % A)

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

伪随机数发生器

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

double Random(void)

{

long TmpSeed;

TmpSeed=A*(Seed%Q)-R*(Seed/Q);

if(TmpSeed>=0)

Seed=TmpSeed;

else

Seed=TmpSeed+M;

return (double)Seed/M;

}

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

为伪随机数发生器播种

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

void InitRandom(unsigned long InitVal)

{

Seed=InitVal;

}

//延时子程序

void delay(unsigned int t)

{

unsigned int i,j;

for(i=0;i

for(j=0;j<10;j++);

}

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

初始化MPU

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

void InitCpu(void)

{

TMOD=0x0;

TH0=0;

TL0=0;

TR0=1;

ET0=1;

EA=1;

}

#define N 25

struct Food

{

unsigned char x;

unsigned char y;

unsigned char yes;

}food;//食物结构体

struct Snake

{

unsigned char x[N];

unsigned char y[N];

unsigned char node;

unsigned char direction;

unsigned char life;

}snake;//蛇结构体

unsigned char Flag=0;

unsigned char Score=0;

unsigned char Speed=5;

unsigned char KeyBuffer=0;

#define FUNC 1

#define UP 2

#define DOWN 3

#define LEFT 4

#define RIGHT 5

#define PASSSCORE 20//预定义过关成绩

void Timer0Int(void) interrupt 1

{

switch(OSReadKey())

{

case 90:

KeyBuffer=FUNC;

if(++Speed>=10)

Speed=1;

Flag|=1<<1;//速度变化标志置1

break;

case 13:

KeyBuffer=DOWN;

/*if(snake.direction!=2)

snake.direction=1;*/

break;

case 33:

KeyBuffer=UP;

/*if(snake.direction!=1)

snake.direction=2;*/

break;

case 23:

KeyBuffer=RIGHT;

/*if(snake.direction!=4)

snake.direction=3;*/

break;

case 43 :

KeyBuffer=LEFT;

/*if(snake.direction!=3)

snake.direction=4;*/

break;

default:

break;

}

}

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

画墙壁，初始化界面

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

void DrawBoard(void)

{

unsigned char n;

for(n=0;n<31;n++)

{

Lcd_Rectangle(3*n,0,3*n+2,2,1);

Lcd_Rectangle(3*n,60,3*n+2,62,1);

}

for(n=0;n<21;n++)

{

Lcd_Rectangle(0,3*n,2,3*n+2,1);

Lcd_Rectangle(90,3*n,92,3*n+2,1);

}

Lcd_HoriLine(93,31,35,1);

Lcd_HoriLine(93,63,35,1);

}

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

打印成绩

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

void PrintScore(void)

{

unsigned char Str[3];

Lcd_WriteStr(6,0,"成绩");

Str[0]=(Score/10)|0x30;//十位

Str[1]=(Score%10)|0x30;//个位

Str[2]=0;

Lcd_WriteStr(7,1,Str);

}

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

打印速度级别

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

void PrintSpeed(void)

{

unsigned char Str[2];

Lcd_WriteStr(6,2,"级别");

Str[0]=Speed|0x30;

Str[1]=0;

Lcd_WriteStr(7,3,Str);

}

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

游戏结束处理

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

void GameOver(void)

{

unsigned char n;

Lcd_Rectangle(food.x,food.y,food.x+2,food.y+2,0);//消隐出食物

for(n=1;n

{

Lcd_Rectangle(snake.x[n],snake.y[n],snake.x[n]+2,snake.y[n]+2,0);//消隐食物，蛇头已到墙壁内，故不用消去

}

if(snake.life==0)//如果蛇还活着

Lcd_WriteStr(2,1,"过关");

else //如果蛇死了

Lcd_WriteStr(2,1,"输了");

Lcd_WriteStr(1,2,"游戏结束");

}

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

游戏的具体过程，也是贪吃蛇算法的关键部分

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

void GamePlay(void)

{

unsigned char n;

InitRandom(TL0);

food.yes=1;//1表示需要出现新事物，0表示已经存在食物尚未吃掉

snake.life=0;//表示蛇还活着

snake.direction=DOWN;

snake.x[0]=6;snake.y[0]=6;

snake.x[1]=3;snake.y[1]=6;

snake.node=2;

PrintScore();

PrintSpeed();

while(1)

{

if(food.yes==1)

{

while(1)

{

food.x=Random()*85+3;

food.y=Random()*55+3;//获得随机数

whil