【单片机开发】基于stm32的掌上游戏机设计（贪吃蛇）

项目相关链接：
1.STM32掌机：音乐播放器
2.STM32掌机：贪吃蛇
3.STM32掌机：俄罗斯方块

（一）效果展示

（二）软件设计

在这里我采用了定时器中断定时读取ADC值，来控制方向

#include "sys.h"
#include "SNAKE.h"
#include "gui.h"
#include "lcd.h"
#include "stdlib.h"
#include "key.h"
#include "adc.h"#define KEY_UP    3
#define KEY_DOWN  4
#define KEY_LEFT  2
#define KEY_RIGHT 1  
#define SNAKE_Max_Long 50//蛇的最大长度 
u8 pause=0;
u8 start=0;
u8 key=0;static Rand=1;void TIM3_Init(u16 per,u16 psc)
{TIM_TimeBaseInitTypeDef  TIM_TimeBaseInitStructure;NVIC_InitTypeDef NVIC_InitStructure;RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE); //时钟使能//定时器TIM3初始化TIM_TimeBaseInitStructure.TIM_Period=per;   //自动装载值TIM_TimeBaseInitStructure.TIM_Prescaler=psc; //分频系数TIM_TimeBaseInitStructure.TIM_ClockDivision=TIM_CKD_DIV1;TIM_TimeBaseInitStructure.TIM_CounterMode=TIM_CounterMode_Up; //设置向上计数模式TIM_TimeBaseInit(TIM3,&TIM_TimeBaseInitStructure);TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE ); //使能指定的TIM3中断,允许更新中断//中断优先级NVIC设置NVIC_InitStructure.NVIC_IRQChannel = TIM3_IRQn;  //TIM3中断NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;  //先占优先级0级NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;  //从优先级3级NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道被使能NVIC_Init(&NVIC_InitStructure);  //初始化NVIC寄存器TIM_Cmd(TIM3, ENABLE);  //使能TIMx					 
}//蛇结构体
struct Snake
{s16 X[SNAKE_Max_Long];s16 Y[SNAKE_Max_Long];u8 Long;//蛇的长度u8 Life;//蛇的生命 0活着 1死亡u8 Direction;//蛇移动的方向
}snake;//食物结构体
struct Food
{u8 X;//食物横坐标u8 Y;//食物纵坐标u8 Yes;//判断是否要出现食物的变量 0有食物 1需要出现食物
}food;//游戏等级分数
struct Game
{u16 Score;//分数u8 Life;//游戏等级	
}game;void touch(void)
{	key= PS2_Scan();	if(key==KEY_UP&&snake.Direction!=4)		//上{snake.Direction=3;} if(key==KEY_DOWN&&snake.Direction!=3)	   //下{snake.Direction=4;} if(key==KEY_LEFT&&snake.Direction!=1)	   //左{snake.Direction=2;} if(key==KEY_RIGHT&&snake.Direction!=2)	  //右{snake.Direction=1;}
}void TIM3_IRQHandler(void)
{if(TIM_GetITStatus(TIM3,TIM_IT_Update)!= RESET){touch();TIM_ClearITPendingBit(TIM3,TIM_IT_Update);	}
}  //界面显示
void show(void){   LCD_Clear(WHITE);LCD_DrawRectangle(0, 0, 101,101);Show_Str(0, 101, BLACK,WHITE,"SCORE:",16,1);LCD_ShowNum(90,101,0,1,16);}  void gameover()
{start=0;//停止游戏LCD_Clear(WHITE);Show_Str(0, 0, BLACK,WHITE,"game over",16,1);
}void play()
{u16 i,n,RAND=1;//i蛇的关节数 n用来判断食物和蛇的身体是否重合u8 life_buf[2];u8 socre_buf[4];snake.Long=2;//定义蛇的长度snake.Life=0;//蛇还活着snake.Direction=1;//蛇的起始方向定义为右game.Score=0;//分数为0game.Life=4;//蛇的生命值food.Yes=1;//出现新食物snake.X[0]=15;snake.Y[0]=15;snake.X[1]=15;snake.Y[1]=15;while(1){if(food.Yes==1)//出现新的食物{while(1){//在设定的区域内显示食物		//food.X=12+rand()%(240/12)*12;//food.Y=12+rand()%(160/12)*12;srand(RAND*TIM_GetCounter(TIM3)*TIM_GetCounter(TIM3));//添加随机种子 采用的RTC时钟		RAND++;food.X=5+rand()%10*10;food.Y=30+rand()%5*10;for(n=0;n<snake.Long;n++){if(food.X==snake.X[n]&&food.Y==snake.Y[n])break;}if(n==snake.Long)food.Yes=0;	break;}}if(food.Yes==0)//有食物就要显示{	LCD_Fill(food.X,food.Y,food.X+5,food.Y+5,RED);}//取得需要重新画的蛇的节数for(i=snake.Long-1;i>0;i--){snake.X[i]=snake.X[i-1];snake.Y[i]=snake.Y[i-1];}//通过按键来设置蛇的运动方向switch(snake.Direction){case 1:snake.X[0]+=5;break;//向右运动case 2:snake.X[0]-=5;break;//向左运动case 3:snake.Y[0]-=5;break;//向上运动case 4:snake.Y[0]+=5;break;//向下运动}for(i=0;i<snake.Long;i++)//画出蛇	LCD_Fill(snake.X[i],snake.Y[i],snake.X[i]+5,snake.Y[i]+5,BLUE);//画蛇身体while(pause==1){};delay_ms(500);//延时LCD_Fill(snake.X[snake.Long-1],snake.Y[snake.Long-1],snake.X[snake.Long-1]+5,snake.Y[snake.Long-1]+5,WHITE);//消除蛇身		//判断是否撞墙if(snake.X[0]<0||snake.X[0]>100||snake.Y[0]<0||snake.Y[0]>100)snake.Life=1;//蛇死掉了//当蛇的身体超过3节后判断蛇自身的碰撞for(i=3;i<snake.Long;i++){if(snake.X[i]==snake.X[0]&&snake.Y[i]==snake.Y[0])//自身的任一坐标值与蛇头坐标相等就认为是自身碰撞game.Life-=1;}if(snake.Life==1||game.Life==0)//以上两种判断以后如果蛇死掉了跳出内循环，重新开始{gameover();break;}	//判断蛇是否吃到了食物if(snake.X[0]==food.X&&snake.Y[0]==food.Y){LCD_Fill(food.X,food.Y,food.X+5,food.Y+5,GRAY);//把吃到的食物消除if(!((snake.Long==SNAKE_Max_Long)&&(snake.Long==SNAKE_Max_Long)))snake.Long++;//蛇的身体长一节game.Score+=10;socre_buf[0]=game.Score/100+0x30;socre_buf[1]=game.Score%100/10+0x30;socre_buf[2]=game.Score%100%10+0x30;socre_buf[3]='\0';LCD_Fill(90,100,106,116,WHITE);Show_Str(90, 100, BLACK,WHITE,socre_buf,16,1);food.Yes=1;//需要重新显示食物}delay_ms(300);}	
}void SNAKE_TASK()
{  Adc_Init();		  		//ADC初始化LCD_Clear(WHITE); NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);  //中断优先级分组 分2组TIM3_Init(50,7199);//启动定时器show();play();}