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Problem with pointer to a constant

 
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Kabukimqn85
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Problem with pointer to a constant
PostPosted: Mon Oct 27, 2008 7:29 am     Reply with quote
I have this array to hold an image. I'm using pic16f887 and I can't hold more than 256 array.

Code:

File img.h
const char IMGA[256]={121,212,545...} // this holds a part of an image


Code:

File main.c

#include <16f887.h>
#DEVICE PASS_STRINGS = IN_RAM // I saw this in forum to create a pointer to a constant

void draw_bitmap(char *IMG)
{
//Process...

}



the problem is I can't access to values.

IMG[index]
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Mon Oct 27, 2008 12:29 pm     Reply with quote
The 'const' array size limit for 16F PICs is 256 bytes:
http://www.ccsinfo.com/forum/viewtopic.php?t=36068

See the code at the end of this thread. It uses a switch-case statement
to select which 'const' text to display:
http://www.ccsinfo.com/forum/viewtopic.php?t=36068
Also see this one:
http://www.ccsinfo.com/forum/viewtopic.php?t=880&start=1

There might be other ways to do it.
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