qqq1.c

各种基本的小程序,用到了实验板中的各个功能,很有用哦!

#include<reg51.h>
#include<intrins.h>


sbit RSPIN = P0^2;
sbit RWPIN = P0^3;
sbit EPIN = P0^4;

unsigned char XPOS,YPOS;

void delay(unsigned int t)
{  unsigned int i,j;
   for(i=0;i<t;i++)
      for(j=0;j<10;j++)
         ;
}

void lcdwaitidle(void)
{  P2=0xff;
   RSPIN=0;
   RWPIN=1;
   EPIN=1;
   while((P2&0x80)==0x80);
   EPIN=0;
}

void lcdwcn(unsigned char c)
{  RSPIN=0;
   RWPIN=0;
   P2=c;
   EPIN=1;
   _nop_();
   EPIN=0;
}

void lcdwc(unsigned char c)
{  lcdwaitidle();
   lcdwcn(c);
}

void lcdwd(unsigned char d)
{  lcdwaitidle();
   RSPIN=1;
   RWPIN=0;
   P2=d;
   EPIN=1;
   _nop_();
   EPIN=0;
}

void lcdpos(void)
{  XPOS&=0x0f;
   YPOS&=0x03;
   if(YPOS==0x00)
      lcdwc(XPOS|0x80);
   else if(YPOS==0x01)
      lcdwc((XPOS+0x40)|0x80);
}

void lcdreset()
{ 
   lcdwc(0x38);
   
   lcdwc(0x01);
   lcdwc(0x06);
   lcdwc(0x0c);
}

void lcdfill(unsigned char n)
{
   for(YPOS=0;YPOS<2;YPOS++)
      for(XPOS=0;XPOS<16;XPOS++)
      {  lcdpos();
         lcdwd(n);  }
}

void lcdwda(unsigned char x,unsigned char y,unsigned char *s)
{  YPOS=y;
   for(XPOS=x;XPOS<16;XPOS++)
   {  lcdpos();
      lcdwd(*s);
      s++;
      delay(400);
   }
}

main()
{  unsigned char i;
   EPIN=0;
   while(1)
   {  lcdreset();
      for(i=0x30;i<=0x3a;i++)
      {  lcdfill(i);
         delay(5000);
      }
      lcdfill(' ');
      delay(2000);
      lcdwda(0,0,"    GJ-200U     ");
      lcdwda(0,1,"chinagujing.com ");
      delay(20000);
      lcdwda(0,0," Welcome! GJ-LTD");
      delay(2000);
      lcdwda(0,1,"start for MCS51 ");
      delay(20000);
      lcdwda(0,0,"TEL:[phone]");
      lcdwda(0,1,"FAX:[phone]");
      delay(20000);
   }
}