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Error in compiling mmcsd.c library

 
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isururivi



Joined: 09 Aug 2011
Posts: 3

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Error in compiling mmcsd.c library
PostPosted: Mon May 26, 2014 1:20 am     Reply with quote
When I am going to write to sd card I include mmcsd.c file and fat.c file.
But when I compile my project file it shows the following error:

data item too big ----->
uint8_t g_mmcsd_buffer[MMCSD_MAX_BLOCK_SIZE];
dyeatman



Joined: 06 Sep 2003
Posts: 1934
Location: Norman, OK

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PostPosted: Mon May 26, 2014 6:35 am     Reply with quote
The CCS manual says this:

Quote:
Data item too big
Define expansion is too large
A fully expanded DEFINE must be less than 255 characters. Check to be sure the DEFINE is
not recursively defined.
Define syntax error
This is usually caused by a missing or misplaced (or) within a define.
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ckielstra



Joined: 18 Mar 2004
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PostPosted: Tue May 27, 2014 4:51 am     Reply with quote
Just a wild guess:
You are compiling the code for use with a PIC16 or smaller device?

MMC & SD cards have to be accessed in blocks of 512 bytes. Many PIC16 chips don't have large enough RAM memory to hold all this data. Save yourself a lot of trouble and choose a chip with more than 1500 bytes of RAM, best a PIC18.
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