PIC16F876 to PIC18F2620

andreluizeng · Joined: 04 Apr 2006 Posts: 117 Location: Brasil

Hi,

Im having some problem to run a code on PIC18F2620 that works fine on PIC16F876.

The main problem is in spi communication, when i try to initialize a mmc card connected at bus, with 16F876 it works fine, but when i use 18F2620 i cant initialize the card.

the only things that are diferente between softwares are the address of registers like SSPBUF, SSTAT and IO PORTS.

has somebody the same problem ?

thanks.
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Andre

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Always post your compiler version.

andreluizeng · Joined: 04 Apr 2006 Posts: 117 Location: Brasil

Sorry..

IDE 4.013
PCB 4.013
PCM 4.013
PCH 4.013
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Andre

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

Post a small test program. Show the #include, #fuses, #use delay(),
and any other #use statements (such as fast_io). Put in a small main()
that shows the setup_spi() statement, and TRIS statements, if you use
any. This program should be for the 18F2620.

I can then compile it for your version (or one that's close to it)
and for the latest version. I can compare the .LST files to see
if your version has a problem with the setup_spi() function.

Franck26 · Joined: 29 Dec 2007 Posts: 122 Location: Ireland

Hello,
Do you have the same quartz frequency on your 2 boards?

Franck.

andreluizeng · Joined: 04 Apr 2006 Posts: 117 Location: Brasil

PCM, Im going to do this...

Franck, Im using the same board.. just changing the pics on it...
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Andre

Guest · Posted: Fri Jan 25, 2008 8:07 am

Hi,

i solved the problem...

PCM, I checked the list file of 16f and 18f and i found something diferent between softwares..

then i made my own spi initialization.. and it works fine...

but it is really getting hard to trust on CCS built-in functions....

thanks for the help.

Ttelmah · Guest

If you go and look at the 'Version 4' sticky thread at the top of this group, you will find that 4.013, predates the point were V4, really began to be pretty reliable... :-(
I'd suggest, since you have a demonstable 'fault' with the inbuilt SPI, you moan at CCS, who will normally give a latter version free in this case.
I'd suspect that your code would work fine, using the inbuilt functions, in perhaps 4.040.

Best Wishes