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LCD16x2 Driver

 
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wordizlife



Joined: 08 Mar 2012
Posts: 38
Location: Canada

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LCD16x2 Driver
PostPosted: Wed Mar 21, 2012 6:01 pm     Reply with quote
Hello,

I am testing a 16x2 LCD driver source code on a PIC16F877A, and I am having trouble understanding what one section of it does:

Code:
#include <pic.h>
static bit LCD_RS @ ((unsigned)&PORTE*8+0); // Register select
static bit LCD_EN @ ((unsigned)&PORTE*8+2); // Enable
static bit LCD_RW @ ((unsigned)&PORTE*8+1); // R/W
#define EN_TRIG ((LCD_EN = 1),(LCD_EN = 0));


The error I am getting when I compile is that the #include <pic.h> cannot be found.

What does this portion of code mean?:
Code:
@ ((unsigned)&PORTE*8+0);


Couldn't that whole portion of code be replaced by the code below since TRISE = 0x89?:
Code:

#include<16F877A.h>
static bit LCD_RS = 0x9.0 // Register Select
static bit LCD_EN = 0x9.2 // ENable
static bit LCD_RW = 0x9.1 // R/W
#define EN_TRIG ((LCD_EN = 1),(LCD_EN = 0));
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Wed Mar 21, 2012 6:35 pm     Reply with quote
That's because it's for the Hi-Tech C compiler. Are you using CCS or
Hi-Tech ?

If you are using the CCS compiler:
If you need an lcd driver, don't waste your time converting Hi-Tech code
to CCS. Just use the CCS compatible drivers. Either use lcd.c from the
CCS drivers directory:
Quote:

c:\program files\picc\drivers\lcd.c

Or use the Flex lcd driver in the Code Library forum
http://www.ccsinfo.com/forum/viewforum.php?f=2
wordizlife



Joined: 08 Mar 2012
Posts: 38
Location: Canada

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PostPosted: Wed Mar 21, 2012 6:57 pm     Reply with quote
I am using CCS.

So I will be looking at the lcd.c file.

I had created my own LCD header file but I am having trouble sending data to the screen that is coming from another pic and thought that my coding would probably have been the problem.
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