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lcd.c driver file

 
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UDIPTA



Joined: 29 Apr 2009
Posts: 13
Location: Kolkata,India

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lcd.c driver file
PostPosted: Sat Aug 01, 2009 12:01 am     Reply with quote
I would like to use port C of pic16f876a to drive lcd. But standard lcd driver lcd.c uses port B or port D. Can it be modified for port C utilization? If yes, then where do I have to change in the code?

I do not want to use flex lcd as it creates some problems.
Please say how standard lcd.c can be used in my program.
anandpv2009



Joined: 26 Jul 2009
Posts: 31

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PostPosted: Tue Aug 04, 2009 11:58 am     Reply with quote
I am also looking for such a driver. I can't use the port as output while using flex_lcd driver. I think it is not just a easy task......
bkamen



Joined: 07 Jan 2004
Posts: 1611
Location: Central Illinois, USA

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Re: lcd.c driver file
PostPosted: Tue Aug 04, 2009 12:16 pm     Reply with quote
UDIPTA wrote:
I would like to use port C of pic16f876a to drive lcd. But standard lcd driver lcd.c uses port B or port D. Can it be modified for port C utilization? If yes, then where do I have to change in the code?

I do not want to use flex lcd as it creates some problems.
Please say how standard lcd.c can be used in my program.



in LCD.C
Code:

#ifndef LCD_DATA_PORT
   #if defined(__PCB__)
      #define LCD_DATA_PORT      0x06     //portb
      #define set_tris_lcd(x)   set_tris_b(x)
   #elif defined(__PCM__)
      #define LCD_DATA_PORT      getenv("SFR:PORTD")     //portd
   #elif defined(__PCH__)
      #define LCD_DATA_PORT      getenv("SFR:PORTD")    //portd
   #elif defined(__PCD__)
      #define LCD_DATA_PORT      getenv("SFR:PORTD")    //portd
   #endif   
#endif


You change it to the port you want.

PORTC would be your answer.

But also look closely at the header...

Code:

////  Example of pin access:                                               ////
////     #define LCD_ENABLE_PIN  PIN_E0                                    ////
////     #define LCD_RS_PIN      PIN_E1                                    ////
////     #define LCD_RW_PIN      PIN_E2                                    ////
////     #define LCD_DATA4       PIN_D4                                    ////
////     #define LCD_DATA5       PIN_D5                                    ////
////     #define LCD_DATA6       PIN_D6                                    ////
////     #define LCD_DATA7       PIN_D7                                    ////


Don't forget to define your control pins.

-Ben
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