贪吃蛇蛇移动代码keil+c+proteus实现

#include<LPC21XX.h>
#include"lcd12864.h"
INT32U snakemove(void);
void delay(INT32U ms);
#define LCD12864_CTL_NO 11      
#define LCD12864_DAT_NO 16      
#define LCD12864_CSA (1<<(LCD12864_CTL_NO))  
#define LCD12864_CSB (1<<(LCD12864_CTL_NO+1))
#define LCD12864_RS (1<<(LCD12864_CTL_NO+2))  
#define LCD12864_RW (1<<(LCD12864_CTL_NO+3))
#define LCD12864_EN (1<<(LCD12864_CTL_NO+4))
#define LCD12864_CLR IO0CLR  
#define LCD12864_SET IO0SET  
#define LCD12864_DIR IO0DIR  
#define LCD12864_PIN IO0PIN  
#define LCD12864_SEL0 PINSEL0
#define LCD12864_SEL1 PINSEL1 
#define LCD_STARTROW   0xC0  
#define LCD_PAGE   0xB8  
#define LCD_LINE   0x40  
#define SINGLE_SCREEN_LINE  64 
#define LCD_DispOn  0x3F
void vWriteCMD2(INT8U ucCMD)
{
 LCD12864_CLR=LCD12864_RS;
 LCD12864_CLR=LCD12864_RW;

 LCD12864_CLR=0xFF <<LCD12864_DAT_NO;
 LCD12864_SET=ucCMD<<LCD12864_DAT_NO;
 LCD12864_SET=LCD12864_EN;
 LCD12864_CLR=LCD12864_EN;
}
void WriteData2(INT8U ucData)
{
 LCD12864_SET=LCD12864_RS;
 LCD12864_CLR=LCD12864_RW;

 LCD12864_CLR=0xFF <<LCD12864_DAT_NO;
 LCD12864_SET=ucData<<LCD12864_DAT_NO;
 
 LCD12864_SET=LCD12864_EN;
 LCD12864_CLR=LCD12864_EN;

}
void CleanAll2(void)
{
 INT8U page,lin;
 LCD12864_SET=LCD12864_CSA; 
 LCD12864_SET=LCD12864_CSB;
 for(page=0;page<8;page++)
 {
 
  vWriteCMD2(LCD_PAGE+page); 
  vWriteCMD2(LCD_LINE);  
  for(lin=0;lin<64;lin++)
   WriteData2(0x00);
 }
}

void LCDInit2(void)
{
 LCD12864_SEL0 &=0x003FFFFF;
 LCD12864_DIR |=0x00FFF800;
 LCD12864_CLR |=0x00FFF800;
 vWriteCMD2(LCD_DispOn); 
 vWriteCMD2(LCD_STARTROW); 
 CleanAll2();
}
void writeByte(uint8 page,uint8 lin,uint8 ucData)
{ 
 
 if(lin/SINGLE_SCREEN_LINE==0)
 {
  LCD12864_SET=LCD12864_CSA;
  LCD12864_CLR=LCD12864_CSB;
 }
 else{
  LCD12864_CLR=LCD12864_CSA;
  LCD12864_SET=LCD12864_CSB;
 }

             
 vWriteCMD2(LCD_PAGE+page);
 vWriteCMD2(LCD_LINE+lin%SINGLE_SCREEN_LINE);
 WriteData2(ucData);
}
INT32U snakemove(void)
{ 
 INT8U k=4;
 INT8U h=12;
 INT8U a=12;
 INT32U j,i=0;
 INT32U n=4;
    INT8U lin=0,page=0;
 INT8U empty[4]={0x00,0x00,0x00,0x00};
 INT8U snake[4]={0x0f,0x0f,0x0f,0x0f};
 INT8U snake1[12]={0x0f,0x0f,0x0f,0x0f,0x0f,0x0f,0x0f,0x0f,0x0f,0x0f,0x0f,0x0f};
 for(lin=0;lin<12;lin++)
  writeByte(page,lin,snake1[lin]);
 for(i=0;;i++)
 {
  if(n!=0)
  {
  for(lin=a;lin<a+k;lin++)
  {
   j=lin-h;
   writeByte(page,lin,snake[lin%k]);
   writeByte(page,j,empty[j%k]);
  }
  }
  else
  {
  for(lin=a;lin<a+k;lin++)
  {
   j=lin-h;
   writeByte(page,lin,snake[lin%k]);
   writeByte(page,lin+k,snake[lin%k]);
   writeByte(page,j,empty[j%k]);
  }
  lin=lin+4;
  h=h+4;
  }
  n--;
  lin=lin%128;
  a=lin;
  delay(200);
 }
 

 return 1;
} 
INT32S main()
{

 LCDInit2(); 
 snakemove();
}

void delay(INT32U ms)
{
  INT32U i=0;
  for(;ms>0;ms--)
  {
     for(i=0;i<2500;i++)
     {
       ;
       ;
       ;
       ;
     }
  }
}