PIC24FJ96GA010 + CCS + FAT32 = Impossible

[ea7fnj]

fat32 ccs

Hi guys!

I've been programming a FAT32 for a SD in a PIC24 using the libraries in CCS forums. I tried to migrate the code but it failed in everywhere.

So, I've spent more than two months trying it but there is no success.

Does anybody try it with success? I supposed this code works fine in PIC18.

Can anybody help me?

73's

 

[bepobalote]

c30 fat32 source

why don't you try to use the ELM-FAT:
http://elm-chan.org/fsw/ff/00index_e.html
I have ported it flawlessly (only small modifications) on several PICs.

 

[ea7fnj]

microchip fat32 sourcecode

Hi!

Thanks for the info.

Did you port using PCWHD compiler? It's giving me somre errors.

Nice code!

 

[bepobalote]

fat ccs compiler

I used the default Microchip compiler.

 

[ea7fnj]

pic18*fat32

I used the default Microchip compiler.

Aaahhh, ok ok ok.

So you used C30 complier, didn't you?

In this case, the Microchip C compiler is so expensive. I've my own license of CCS C compiler, and it's the tool that I can use in this situation.

CCS C Compiler isn't as 'ANSI' as Microchip C Compiler. It has some differents but usable.

Does anybody use CCS to implement FAT32 over SD memory with a PIC24FJ?

This post has so many readings, more than 190 xD

 

[FvM]

pic24*fat32

You didn't tell, which problems you experienced in implementing the project with PCD. Looking at your code, I guess that the low level SPI access already doesn't work correctly. Did you ever verify the operation of MMCOut(), MMC8Clock() and MMCIn()? As discussed at CCS forum, the SPI built-in functions don't work when mixing spi_write() and spi_read(). I rather suggest this simple low level routines. Macros could be used for a further optimization. However, I didn't check your MMCInit() code.

void MMCOut(int8 indata)
{
spi_read2(indata);  
}     
       
void MMC8Clock()                        
{
spi_read2(0xFF);    
}
                                  
int8 MMCIn()
{
return spi_read2(0xFF);
}

Of course, there may be other issues, too. But obviously, the low level code must be correct first. Please consider, that I didn't implement any FAT operation with PIC24, I only had a look at your SPI code.

 

[gorkin]

programming pic24fj96ga010

Dont wast time using poor and non ANSI C compiler like CCS. Use a good and ANSI C compiler like hitech or microchip on mplad ide!

There are lot of source code of system files (the elm is one). I think that microchip has own application note describing one system file for some cards used today.

Gorkin