Found this code online...

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Neyolight

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Hi ALL

Ok so i found this bit of code online:

//#include <p18f4450.h>
#include <p18cxxx.h>
//#pragma config WDT = OFF, LVP = OFF, FOSC = INTOSC_HS //internal oscillator

#pragma config WDT=OFF,LVP=OFF,FOSC=HSPLL_HS,PLLDIV=5,CPUDIV=OSC2_PLL3 //run with external oscillator

void main (void);
void InterruptHandlerLow (void);

#define LCD_DATA PORTD ------> I DONT GET WHAT THESE 4 lines are doing? And How they are doing what they are doing?
#define LCD_EN PORTCbits.RC2
#define LCD_RW PORTCbits.RC1
#define LCD_RS PORTCbits.RC0

#define A PORTAbits.RA0
#define B PORTAbits.RA1
#define C PORTAbits.RA2
#define D PORTAbits.RA3




thanks
 

#define LCD_DATA PORTD .
After writing this line you can access PORTD as LCD_DATA. Means using LCD_DATA in your code is same as using PORTD.

Now
PORTD=0x00;
and
LCD_DATA=0x00; are same.
 
Thanks

I posted this question and within an hour I reliased what it was
 

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