lcm.c

Keil 8051 C example RS232 to I2c

#include <stdio.h>  
//#include <at89x52.H> 
#include <reg54.h>
#include <intrins.h>
#include "SystemEvent.h"
#include "ExtVar.h"
#include "function.h"
//extern idata unsigned int _Counter; 
idata unsigned char _Idx;
idata unsigned char _px;
code char _CROM[]={" Cortez DTV"};
code char _PROM[]={"EVB v1 "};
code char _BinX[]={"Amtran"};
code char _Type[]={"2006"};



unsigned char ReadLCM(void);
void WriteLCMControl(unsigned char);
void WriteLCMData(unsigned char);
void PrintAChar(unsigned char,unsigned char);
void PrintAShortInt(unsigned char,unsigned char);
void PrintAInt(unsigned int,unsigned char);
void PrintAString(unsigned char *,int,unsigned char);

sbit _RS=P2^0x02;
sbit _RW=P2^0x01;
sbit _EN=P2^0x00;

 
//extern unsigned int _sec,_min,_hour;
 

//extern unsigned int _secx,_minx,_hourx;


void PrintAChar(unsigned char _stx,unsigned char _Offset){   
         while((ReadLCM()&0x80)==0x80); 
             
          WriteLCMControl(_Offset+0x80);
          while((ReadLCM()&0x80)==0x80); 
       
         WriteLCMData(_stx);
          while((ReadLCM()&0x80)==0x80); 
}

void PrintTestPage(void){



//  char buf[0x10];
  

  //    _Counter++;

       while((ReadLCM()&0x80)==0x80); 
     
          _px=0;
             PrintAString(_CROM,(sizeof(_CROM)-1),_px);
             _px+=sizeof(_CROM)-2;
  
             _px=0x0a;
             PrintAString(_PROM,(sizeof(_PROM)-1),_px);
             _px+=sizeof(_PROM)-2;
             PrintAInt(0x05,_px);

			 _px+=5;
             PrintAChar('F',_px);
 
 }

 
void PrintAInt(unsigned int _XData,unsigned char _Offset){
unsigned int _ix;
unsigned int _XD,_XC;
unsigned char _jx;

             _XD=_XData;
      
          while((ReadLCM()&0x80)==0x80);   
         

     for(_ix=0;_ix<0x04;_ix++){

          WriteLCMControl(_Offset+0x80+_ix);
          while((ReadLCM()&0x80)==0x80); 
         
         _XC=(_XD&0xf000);
		 _jx=(unsigned char)(_XC>>12);
         if(_jx>0x09){ _jx-=0x0a; _jx+='a'; } 
         else _jx+='0';

         WriteLCMData(_jx);
         while((ReadLCM()&0x80)==0x80); 
         _XD<<=4;
	 }

}

 
void PrintAShortInt(unsigned char _XData,unsigned char _Offset){
unsigned int _ix;
unsigned int _XD,_XC;
unsigned char _jx;

             _XD=_XData;
      
          while((ReadLCM()&0x80)==0x80);   
         

     for(_ix=0;_ix<0x02;_ix++){

          WriteLCMControl(_Offset+0x80+_ix);
          while((ReadLCM()&0x80)==0x80); 
         
         _XC=(_XD&0xf0);
		 _jx=(unsigned char)(_XC>>4);
         if(_jx>0x09){ _jx-=0x0a; _jx+='a'; } 
         else _jx+='0';

         WriteLCMData(_jx);
         while((ReadLCM()&0x80)==0x80); 
         _XD<<=4;
	 }

}

 
void PrintAString(unsigned char *_stx,int _ax,unsigned char _Offset){
unsigned int _ix;
   
          while((ReadLCM()&0x80)==0x80);   
         
     for(_ix=0;_ix<_ax;_ix++){

          WriteLCMControl(_Offset+0x80+_ix);
          while((ReadLCM()&0x80)==0x80); 
       
         WriteLCMData(*(_stx+_ix));
         while((ReadLCM()&0x80)==0x80); 
         
	 }

}
/*
void PrintAChar(unsigned char _stx,unsigned char _Offset){   
          while((ReadLCM()&0x80)==0x80);   
             
          WriteLCMControl(_Offset+0x80);
          while((ReadLCM()&0x80)==0x80); 
       
         WriteLCMData(_stx);
         while((ReadLCM()&0x80)==0x80); 
}

*/

 

unsigned char ReadLCM(void){
unsigned char _xbuf;
 
 
      _RS=0;
      _RW=1;
	  _EN=1;
     P0=0xff;
     _xbuf=P0; 
      _EN=0;
   	  _RS=1;
      _RW=1;
 

  
 	    
     return(_xbuf);
}

void WriteLCMControl(unsigned char _xbuf){

     
      _RW=0;
 	  _RS=0;

	  _EN=1;

      P0=_xbuf; 

      _EN=0;

 	  _RW=1;
 	  _RS=1;

 
}

void WriteLCMData(unsigned char _xbuf){
 

      _RW=0;
      _RS=1;   
	  _EN=1;
     P0=_xbuf; 
      _EN=0;
      _RW=1;
      _RS=1;    
 
}



void LCM_Init(void){  
unsigned char _ix;
 
       while((ReadLCM()&0x80)==0x80);  // wait LCD busy  
       WriteLCMControl(0x38);          // write LCM control mode 
	   while((ReadLCM()&0x80)==0x80);  // wait LCD busy        
         WriteLCMControl(0x0c);			// write LCM control mode 
       while((ReadLCM()&0x80)==0x80);  // wait LCD busy   
         WriteLCMControl(0x06);			// write LCM control mode 
 	   while((ReadLCM()&0x80)==0x80);  // wait LCD busy  
 
     for(_ix=0;_ix<20;_ix++){
           WriteLCMData((unsigned char)_ix+0x80);	

           WriteLCMData((unsigned char)_ix+0xc0);
 	   while( (ReadLCM()&0x80)==0x80);  
	 }

    WriteLCMControl(1);
        //     _px=0;
        //     PrintAString(_CROM,(sizeof(_CROM)-1),_px);

        //_px=0x40;
        //     PrintAString(_BinX,(sizeof(_BinX)-1),_px);
		_px=0x48;
	//	PrintAInt(0x1234,_px);  // for test
		PrintAShortInt(0x08,_px+6);  // for test
	}