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#include "stc.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<t;i++) for(j=0;j<10;j++); } /********************************* 初始化MPU **********************************/ void InitCpu(void) { TMOD=0x01; 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; //speed越大，速度越慢 unsigned char KeyBuffer=0; #define FUNC 1 //(P3^1)表示级别 #define UP 2 //(P3^3)表示左 #define DOWN 3 //(P3^5)表示右 #define LEFT 4 //(P3^4)表示下 #define RIGHT 5 //(P3^2)表示上 #define PASSSCORE 20 //预定义过关成绩 void Timer0Int(void) interrupt 1 { switch(OSReadKey()) { case 5: KeyBuffer=FUNC; //表示级别 /*if(++Speed>=10) Speed=1; Flag|=1<<1;//速度变化标志置1*/ break; case 21: KeyBuffer=DOWN; //表示右 /*if(snake.direction!=2) snake.direction=1;*/ break; case 13: KeyBuffer=UP; //表示左 /*if(snake.direction!=1) snake.direction=2;*/ break; case 9: KeyBuffer=RIGHT; //表示上 /*if(snake.direction!=4) snake.direction=3;*/ break; case 17: KeyBuffer=LEFT; //表示下 /*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<snake.node;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 while(food.x%3!=0) food.x++; while(food.y%3!=0) food.y++; for(n=0;n<snake.node;n++)//判断产生的食物坐标是否和蛇身重合 { if((food.x==snake.x[n])&&(food.y==snake.y[n])) break; } if(n==snake.node) { food.yes=0; break;//产生有效的食物坐标 } } } if(food.yes==0) { Lcd_Rectangle(food.x,food.y,food.x+2,food.y+2,1); } for(n=snake.node-1;n>0;n--) { snake.x[n]=snake.x[n-1]; snake.y[n]=snake.y[n-1]; } switch(snake.direction) { case DOWN:snake.x[0]+=3;break; case UP:snake.x[0]-=3;break; case RIGHT:snake.y[0]-=3;break; case LEFT:snake.y[0]+=3;break; default:break; } for(n=3;n<snake.node;n++)//从第三节开始判断蛇头是否咬到自己 { if(snake.x[n]==snake.x[0]&&snake.y[n]==snake.y[0]) { GameOver(); snake.life=1; break; } } if(snake.x[0]<3||snake.x[0]>=90||snake.y[0]<3||snake.y[0]>=60)//判蛇头是否撞到墙壁 { GameOver(); snake.life=1; } if(snake.life==1) break;//蛇死，则跳出while(1)循环 if(snake.x[0]==food.x&&snake.y[0]==food.y)//判蛇是否吃到食物 { Lcd_Rectangle(food.x,food.y,food.x+2,food.y+2,0);//消隐食物 snake.x[snake.node]=200; snake.y[snake.node]=200;//产生蛇新的节坐标先放在看不见的位置 snake.node++;//蛇节数加1 food.yes=1;//食物标志置1 if(++Score>=PASSSCORE) { PrintScore(); GameOver(); break; } PrintScore(); } for(n=0;n<snake.node;n++) { Lcd_Rectangle(snake.x[n],snake.y[n],snake.x[n]+2,snake.y[n]+2,1); }//根据蛇的节数画出蛇 delay(Speed*1000); //调速 delay(Speed*1000); Lcd_Rectangle(snake.x[snake.node-1],snake.y[snake.node-1],snake.x[snake.node-1]+2,snake.y[snake.node-1]+2,0); switch(KeyBuffer) { case FUNC: KeyBuffer=0; if(++Speed>=10) Speed=1; PrintSpeed(); break; case DOWN: KeyBuffer=0; if(snake.direction!=UP) snake.direction=DOWN; break; case UP: KeyBuffer=0; if(snake.direction!=DOWN) snake.direction=UP; break; case RIGHT: KeyBuffer=0; if(snake.direction!=LEFT) snake.direction=RIGHT; break; case LEFT: KeyBuffer=0; if(snake.direction!=RIGHT) snake.direction=LEFT; break; default: break; } }//结束while(1) } void Main() { InitCpu();//初始化CPU Lcd_Reset(); //初始化LCD屏 Lcd_WriteStr(2,1,"航峰兴业"); delay(5000); delay(5000); Lcd_WriteCmd(0x01); //清除显示，并且设定地址指针为00H Lcd_Clear(0);//清屏 DrawBoard();//画界面 GamePlay();//玩游戏 GameOver();//游戏结束 while(1);//要想重玩，只能重启，可继续完善该游戏 }
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