Parallel Port 0 and Pin 0 in Keil Simulation

[bianchi77]

I have a simulation in Keil,

Why are the pins not blinking together with P0 ?

Thanks

 

[aameer]

Can u provide the code for it...

 

[bianchi77]

#define  LCD_DataPortL P0
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void Lcd_Write_Com( int  DH)	 //ÃüÁî
{	
    LCD_RS=0;
	LCD_CS =0;	 
	LCD_DataPortH=DH>>8;	
	LCD_DataPortL=DH;		
	LCD_WR=0;
	LCD_WR=1;
	LCD_CS =1;	
}
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void lcd_write_color(char hh,char ll)	//·¢ËÍÑÕÉ«Êý¾ÝΪÌá¸ßËٶȸß8λµÍ8λ·Ö±ð´«µÝ	
{
    LCD_RS=1;
	LCD_CS =0;	  				
	LCD_DataPortH=hh;	
	LCD_DataPortL=ll;					
	LCD_WR=0;
	LCD_WR=1;
	LCD_CS =1;	
}

---------- Post added at 12:42 ---------- Previous post was at 12:41 ----------

Can u provide the code for it...

The code :

#define  LCD_DataPortL P0
.
.
.
.
.
void Lcd_Write_Com( int  DH)	 //ÃüÁî
{	
    LCD_RS=0;
	LCD_CS =0;	 
	LCD_DataPortH=DH>>8;	
	LCD_DataPortL=DH;		
	LCD_WR=0;
	LCD_WR=1;
	LCD_CS =1;	
}
.
.
.
.
.
.
void lcd_write_color(char hh,char ll)	//·¢ËÍÑÕÉ«Êý¾ÝΪÌá¸ßËٶȸß8λµÍ8λ·Ö±ð´«µÝ	
{
    LCD_RS=1;
	LCD_CS =0;	  				
	LCD_DataPortH=hh;	
	LCD_DataPortL=ll;					
	LCD_WR=0;
	LCD_WR=1;
	LCD_CS =1;	
}

 

[aameer]

You are using 8051 micro controller right...
Have you used pull resistors for port 0

 

[bianchi77]

You are using 8051 micro controller right...
Have you used pull resistors for port 0

I don't think pull up resistors will help, since I can't see output signal in those pins on simulation and on a real chip....
so how can I make the P0 pin runing together with Port P0 ?

 

[bianchi77]

I don't think pull up resistors will help, since I can't see output signal in those pins on simulation and on a real chip....
so how can I make the P0 pin runing together with Port P0 ?

I moved it to P3 and it's ok...