单片机之旅——串口、8*8点阵

#include <AT89X52.H>


unsigned char code tab[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};

unsigned char code digittab[10][8]={ 
                                    {0x00,0x00,0x21,0x7f,0x01,0x00,0x00,0x00},     //1

                                    {0x00,0x00,0x27,0x45,0x45,0x45,0x39,0x00},    //2

                                    {0x00,0x00,0x22,0x49,0x49,0x49,0x36,0x00},    //3

                                    {0x00,0x00,0x0c,0x14,0x24,0x7f,0x04,0x00},     //4

                                    {0x00,0x00,0x72,0x51,0x51,0x51,0x4e,0x00},    //5

                                    {0x00,0x00,0x3e,0x49,0x49,0x49,0x26,0x00},    //6

                                    {0x00,0x00,0x40,0x40,0x40,0x4f,0x70,0x00},     //7

                                    {0x00,0x00,0x36,0x49,0x49,0x49,0x36,0x00},    //8

                                    {0x00,0x00,0x32,0x49,0x49,0x49,0x3e,0x00},     //9	
										  
									{0x00,0x00,0x3e,0x41,0x41,0x41,0x3e,0x00}    //0
                                    };


unsigned int timecount;

unsigned char cnta;

unsigned char cntb;

unsigned char temp;

unsigned char count;

unsigned char location = 2;
unsigned int flag  = 1;
bit flag_2 = 1;

void delayms(unsigned int m)
{
	unsigned int i,j;
	for(i = m; i > 0; i--)
		for(j = 110; j > 0; j--)
	;
}
void putchar(unsigned char data1)  
{
  	SBUF = data1;               //将待发送的字符送入发送缓冲器
 	while(TI == 0);            //等待发送完成
	TI = 0;                     //发送中断标志请0
}
//字符串发送函数
void putstring(unsigned char *dat)
{
  while(*dat != '\0')           //判断字符串是否发送完毕
 {
   putchar(*dat);        //发送单个字符
  dat++;                 //字符地址加1，指向先下一个字符

 }
}
void send_char()
{
	SCON = 0x50;         //串口工作方式设置
   TMOD = 0x20;         //定时器工作方式设置
 	TH1 = 0xfd;        //		
 	TI = 0;           // 清0发送中断标志         
 		TR1 = 1;          //开启定时器
 ES = 1;
 EA = 1;
 putstring("now,8*8 show 1,2,3,4,5,6,7,8,9,0\0");
}
void main(void)

{
 
  TMOD=0x01;

  TH0=(65536-3000)/256;

  TL0=(65536-3000)%256;

  TR0=1;

  ET0=1;
  PT0 = 0;
  EA=1;

	EX0 = 1;
	PX0 = 1;

  while(1)

    {;

    }

}
void button() interrupt 0
{
	delayms(10);
	flag_2 = ~flag_2;
		
}
void t0(void) interrupt 1 using 0

{
	if(~flag_2){
	if(flag)
	{
		send_char();
		flag = 0;	
	}
   
  TH0=(65536-3000)/256;

  TL0=(65536-3000)%256;

  P0=tab[cnta];

  if(temp == 0)
  {
  	if(cnta < 5)
	{
		P2=digittab[cntb][cnta+2];
	}else{
		P2 = 0x00;
	}			  		
  }else{
  	if(count != temp)
	{
		P2 = 0x00;
		count++;
	}else{
		if(location < 7)
		{
			P2=digittab[cntb][location];
			location++;
		}else{
			P2 = 0x00;
		}				
	}			   
  }		    	
  cnta++;
  if(cnta==8)

    {
	  count = 0;
	  location = 2;
      cnta=0;

    }

  timecount++;
  if(timecount%200 == 0)
  {
  	 temp++;
  }
  if(timecount==1600)

    {

      timecount=0;

      cntb++;
	  temp = 0;

      if(cntb==10)

        {

          cntb=0;

        }

    }
   }
}