typedef unsigned int u16;
typedef unsigned char u8;
sbit up=P3^1;
sbit down=P3^0;
sbit lt=P3^2;
sbit rt=P3^3;
u8 coordx[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe,};
u8 coordy[]={0x80,0x40,0x20,0x10,0x08,0x04,0x02,0x01,};
u8 foodx;
u8 foody;
u8 snake_x[20]={0};
u8 snake_y[20]={0};
u8 length;
u8 direction;
void initsnake();
void Keyboard();
void move();
void creatfood();
void snakegrow(void);
void drawsnake();
void initsnake()//蛇的初始化
{
snake_x[0]=0;//1
snake_y[0]=0;//1
length=1;
direction=2;
}
void move()//移动
{
u8 len=length-1;//u16,漏-1
for (len;len>0;len--)
{
snake_x[len]=snake_x[len-1];
snake_y[len]=snake_y[len-1];
}
switch(direction)//case不加（）
{
case 1:
snake_y[0]--;
break;
case 2:
snake_y[0]++;
break;
case 3:
snake_x[0]--;
break;
case 4:
snake_x[0]++;
break;
default:
break;
}
}
void Keyboard()//按钮
{
if(up==0)
{
Delay(10);//避免
if(up==0)
{
direction=1;
}
while(!up);//!up,原up==1
}
if(down==0)
{
Delay(10);
if(down==0)
{
direction=2;
}
while(!down);//!down
}
if(lt==0)
{
Delay(10);
if(lt==0)
{
direction=3;
}
while(!lt);//改
}
if(rt==0)
{
Delay(10);
if(rt==0)
{
direction=4;
}
while(!rt);//改
}
}
void creatfood()//食物创造
{
u8 i;//u16
foodx=rand()%8;
foody=rand()%8;
for(i=0; i<length; i++)
{
if((foodx==snake_x[i])&&(foody==snake_y[i]))//括号运算优先级
{
creatfood();
}
}
}
void snakegrow()//吃食物后增厂长
{
if(foody==snake_y[0]&&foodx==snake_x[0])
{
creatfood();
snake_x[length]=snake_x[length-1];
snake_y[length]=snake_y[length-1];
length++;
}
}
void drawsnake()//调佣mtrixled来绘制蛇和食物
{
u8 i;//u16
for(i=0;i<length;i++)//应该是小于length
{
MatrixLED_ShowColumn(coordy[snake_y[i]],coordx[snake_x[i]]);
MatrixLED_ShowColumn(coordy[foody],coordx[foodx]);
}
}
void judgedeath()//判断死亡
{
u8 i;//u16
if((snake_x[0]>7)||(snake_y[0]>7))
{
_74H595_WriteByte(0x00);//MatrixLED_ShowColumn(0x00,0xff);//清屏
while(1);
}
for(i=4; i<length;i++)
{
if((snake_x[0]==snake_x[i])&&(snake_y[0]==snake_y[i]))
{
P0=0xFF;//MatrixLED_ShowColumn(0x00,0xff);
while(1);
}
}
}
void Timer0Init()
{
TMOD|=0X01;//选择为定时器0模式，工作方式1，仅用TR0打开启动。
TH0=0XD8; //给定时器赋初值，定时10ms
TL0=0XF0;
ET0=1;//打开定时器0中断允许
EA=1;//打开总中断
TR0=1;//打开定时器
}
void Timer0() interrupt 1
{
static u16 i;
TH0=0XD8; //给定时器赋初值，定时10ms
TL0=0XF0;
i++;
if(i==50)
{
i=0;
move();
}
}
void main()
{
Timer0Init();
initsnake();
while (1)
{
drawsnake();
judgedeath();
snakegrow();
Keyboard();
}
}