利用51单片机和LCD12864实现贪吃蛇游戏代码

以下是一个基于51单片机和LCD12864的简单贪吃蛇游戏代码，需要配合相应的硬件电路使用：

#include <reg52.h>
#include <intrins.h>

#define uchar unsigned char
#define uint unsigned int

//定义LCD引脚
sbit LCD_RS=P2^0;
sbit LCD_RW=P2^1;
sbit LCD_EN=P2^2;
sbit LCD_CS1=P2^3;
sbit LCD_CS2=P2^4;
sbit LCD_RST=P2^5;

//定义按键引脚
sbit KEY_UP=P1^0;
sbit KEY_DOWN=P1^1;
sbit KEY_LEFT=P1^2;
sbit KEY_RIGHT=P1^3;

//定义贪吃蛇结构体
struct Snake
{
    uchar x;
    uchar y;
    uchar dir;
}snake[100];

//定义食物结构体
struct Food
{
    uchar x;
    uchar y;
}food;

//定义游戏参数
uchar score=0;
uchar speed=10;
uchar len=3;
uchar over=0;

//初始化LCD
void InitLCD()
{
    LCD_RST=0;
    _nop_();
    LCD_RST=1;
    LCD_EN=0;
    LCD_CS1=0;
    LCD_CS2=0;
    LCD_RW=0;
    LCD_RS=0;
    _nop_();
    P0=0x3F;
    LCD_EN=1;
    _nop_();
    LCD_EN=0;
    _nop_();
    P0=0xC0;
    LCD_EN=1;
    _nop_();
    LCD_EN=0;
    _nop_();
    P0=0x40;
    LCD_EN=1;
    _nop_();
    LCD_EN=0;
    _nop_();
}

//写命令到LCD
void WriteCmd(uchar cmd)
{
    LCD_RS=0;
    LCD_RW=0;
    _nop_();
    P0=cmd;
    LCD_EN=1;
    _nop_();
    LCD_EN=0;
    _nop_();
}

//写数据到LCD
void WriteData(uchar dat)
{
    LCD_RS=1;
    LCD_RW=0;
    _nop_();
    P0=dat;
    LCD_EN=1;
    _nop_();
    LCD_EN=0;
    _nop_();
}

//清屏
void ClearScreen()
{
    uchar i,j;
    for(i=0;i<8;i++)
    {
        WriteCmd(0xB8+i);
        WriteCmd(0x40);
        for(j=0;j<128;j++)
        {
            WriteData(0x00);
        }
    }
}

//显示字符
void ShowChar(uchar x, uchar y, uchar ch)
{
    uchar i;
    WriteCmd(0xB8+y);
    WriteCmd(0x40+x*8);
    for(i=0;i<8;i++)
    {
        WriteData(font[ch-32][i]);
    }
}

//显示字符串
void ShowString(uchar x, uchar y, uchar *str)
{
    while(*str)
    {
        ShowChar(x++,y,*str++);
    }
}

//绘制贪吃蛇
void DrawSnake()
{
    uchar i;
    for(i=0;i<len;i++)
    {
        WriteCmd(0xB8+snake[i].y/8);
        WriteCmd(0x40+snake[i].x);
        WriteData(0x01<<(snake[i].y%8));
    }
}

//生成食物
void GenerateFood()
{
    uchar x,y;
    do
    {
        x=rand()%120+4;
        y=rand()%8;
    }while(GetPixel(x,y));
    food.x=x;
    food.y=y;
    WriteCmd(0xB8+y);
    WriteCmd(0x40+x);
    WriteData(0xFF>>(7-food.y%8));
}

//获取像素点
uchar GetPixel(uchar x, uchar y)
{
    WriteCmd(0xB8+y/8);
    WriteCmd(0x40+x);
    return (ReadData()>>(7-y%8))&0x01;
}

//读取数据
uchar ReadData()
{
    uchar dat;
    LCD_RS=1;
    LCD_RW=1;
    LCD_EN=1;
    _nop_();
    dat=P0;
    LCD_EN=0;
    _nop_();
    return dat;
}

//移动贪吃蛇
void MoveSnake()
{
    uchar i;
    for(i=len-1;i>0;i--)
    {
        snake[i].x=snake[i-1].x;
        snake[i].y=snake[i-1].y;
    }
    switch(snake[0].dir)
    {
        case 1: snake[0].y--; break;
        case 2: snake[0].x--; break;
        case 3: snake[0].x++; break;
        case 4: snake[0].y++; break;
    }
}

//检测游戏是否结束
void CheckOver()
{
    uchar i;
    if(snake[0].x<4||snake[0].x>123||snake[0].y<0||snake[0].y>7)
    {
        over=1;
        return;
    }
    for(i=1;i<len;i++)
    {
        if(snake[0].x==snake[i].x&&snake[0].y==snake[i].y)
        {
            over=1;
            return;
        }
    }
}

//检测是否吃到食物
void CheckFood()
{
    if(snake[0].x==food.x&&snake[0].y==food.y)
    {
        len++;
        score++;
        GenerateFood();
    }
}

//检测按键
void CheckKey()
{
    if(KEY_UP==0&&snake[0].dir!=4) snake[0].dir=1;
    if(KEY_DOWN==0&&snake[0].dir!=1) snake[0].dir=4;
    if(KEY_LEFT==0&&snake[0].dir!=3) snake[0].dir=2;
    if(KEY_RIGHT==0&&snake[0].dir!=2) snake[0].dir=3;
}

//延时函数
void Delay(uint n)
{
    uint i,j;
    for(i=0;i<n;i++)
    {
        for(j=0;j<50;j++);
    }
}

//主函数
void main()
{
    InitLCD();
    ClearScreen();
    ShowString(0,0,"Score:");
    ShowString(0,1,"Speed:");
    ShowString(0,2,"Snake");
    ShowString(0,3,"Game");
    GenerateFood();
    snake[0].x=60;
    snake[0].y=3;
    snake[0].dir=3;
    DrawSnake();
    while(1)
    {
        CheckKey();
        MoveSnake();
        CheckFood();
        CheckOver();
        if(over) break;
        DrawSnake();
        ShowChar(7,0,score/10+'0');
        ShowChar(8,0,score%10+'0');
        ShowChar(7,1,speed/10+'0');
        ShowChar(8,1,speed%10+'0');
        Delay(100-speed);
    }
    ShowString(0,4,"Game Over!");
    while(1);
}

注意：以上代码仅供参考，具体实现方式可能有所不同。在实际使用中，需要根据硬件电路和开发环境进行相应的修改。