[ECOS] re: Reading flash config value from application

Gary Thomas gary@mlbassoc.com
Wed Jun 21 22:43:00 GMT 2006


On Wed, 2006-06-21 at 18:32 -0400, Andre-John Mas wrote:
> I have uncommented the CHATTER in flash.c and see the read 
> being called in the Redboot, but not in my application when 
> I use the 'CYGACC_CALL_IF_FLASH_CFG_OP2' call. Am I meant to 
> be calling something to load the data from the flash, so it 
> is available to the macro?

No, it doesn't work that way.  RedBoot only reads the 'fconfig'
data once from FLASH and then keeps a copy in RAM.  When your
application tries to fetch data, it uses the RAM version.

> 
> Andre
> 
> > 
> > From: "St. Zarifakis" <stz@swistec.de>
> > Date: 2006/06/21 Wed PM 12:04:07 EDT
> > To: ajmas@bigfoot.com
> > CC: ecos-discuss@sources.redhat.com
> > Subject: Re: [ECOS] re: Reading flash config value from application
> > 
> > Hi,
> > 
> > Andre-John Mas wrote:
> > 
> > >Hi,
> > >
> > >Just tried the code below and the 'CYGACC_CALL_IF_FLASH_CFG_OP' call returns false, just as in the code I had.
> > >
> > >Its possible as Thomas suggests that maybe I have code which does not match what Gary has. I am currrently using 2.0.51, I believe.
> > >  
> > >
> > Could you try the following code ? It should display all available 
> > variables. It works on my system which is eCosCentric's v2.0.50:
> > HTH
> >     Stamatis
> > 
> > #include <stdio.h>
> > 
> > #include <pkgconf/hal.h>
> > #include <cyg/hal/hal_if.h>
> > #include <cyg/infra/diag.h>
> > 
> > void test_func(void)
> > {
> >     // Testfunktion 1: Ausgabe der fconfig-Variablen
> >     struct cyg_fconfig fc;
> >     char key[64];
> > 
> >     diag_printf("fconfig test started\n");
> >     fc.offset = 0;
> >     fc.key = key;
> >     fc.keylen = sizeof(key);
> >     while (CYGACC_CALL_IF_FLASH_CFG_OP2(CYGNUM_CALL_IF_FLASH_CFG_NEXT, 
> > &fc)) {
> >         diag_printf("  Offset: %d, key: '%s', type: %d\n", fc.offset, 
> > fc.key, fc.type);
> >         fc.keylen = sizeof(key);
> >     }
> >     // zurück
> >     diag_printf("... done\n");
> >     return;
> > }
> > 
> > 
> > -- 
> > Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
> > and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
> > 
> 

-- 
------------------------------------------------------------
Gary Thomas                 |  Consulting for the
MLB Associates              |    Embedded world
------------------------------------------------------------


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