RE: [ECOS] Re: Flash support for ea2648 target

[Sergei Gavrikov <sergei dot gavrikov at gmail dot com>]

On Tue, 2 Mar 2010, viren.dobariya@aftek.com wrote:
> > On Tue, 2 Mar 2010, viren.dobariya wrote:
> > > Hi, sergei,
> > >      I am still struggling with flash problem in EA-2468 board.
> > >      In this mail, you mention that Youqiang Zou added
> > > CYG_FLASH_DRIVER definition to flash_ea2468.c. Can you explain me
> > > detail?
> > > Should I add same definition for my board??
> >
> > As I could understand, it is possible the same definition should be added
> > to current platform specific driver. But, Youqiang also pointed that he
> > use other flash parts, so, do not apply his lines as is. To know what the
> > macro is (does), please, refer to eCos documentation:
> >
> > http://ecos.sourceware.org/docs-latest/ref/io-flash.html
> > http://ecos.sourceware.org/docs-latest/ref/ecos-flash-v2-dev.html
> >
> > Sergei
>
> Hi, Sergei,
>   Thanks for documentation.
>   Can you ask Youqiang Zou that how did he add CYG_FLASH_DRIVER 
> defination?? If he gives us example then i will add according to my 
> device.
>
>
> Thanks,
> Viren

I was looking the cludges when I got his e-mail and I'd seen that he did
CC to the list, but, may be he is not subscribed to the list, so, you have
got no copy. Well, he wrote

---------------------------------------------------------------------->8
> From elitechip@gmail.com Sun Feb 28 18:42:54 2010
Date: Mon, 1 Mar 2010 00:42:54 +0800
From: youqiang zou <elitechip@gmail.com>
To: sergei.gavrikov@gmail.com
Cc: ecos-discuss@ecos.sourceware.org
Subject: Re: [ECOS] Re: Re: Flash support for ea2648 target

Refered to the arm_aim711_flash.c, I?changed?the flash_ea2468.c as the below
list.
?
// Device properties
#include <pkgconf/devs_flash_ea2468.h>

// The EA LPC2468 OEM board has one SST 39VF3201 part
#define CYGNUM_FLASH_INTERLEAVE (1)
#define CYGNUM_FLASH_SERIES???? (1)
#define CYGNUM_FLASH_WIDTH????? (16)
#define CYGNUM_FLASH_BASE?????? (0x80000000)
//--------------------------------------------------------------------------
// Platform specific extras
#define CYGPKG_DEVS_FLASH_SST_39VF3201
#ifdef CYGINT_DEVS_FLASH_SST_39VFXXX_REQUIRED
//--------------------------------------------------------------------------
// Now include the driver code.
#include "cyg/io/flash_sst_39vfxxx.inl"
static const cyg_flash_block_info_t cyg_flash_sst_block_info[1] = {
??? { FLASH_BLOCK_SIZE, FLASH_NUM_REGIONS * CYGNUM_FLASH_SERIES }
};
CYG_FLASH_DRIVER(cyg_flash_sst_flashdev,
???????????????? &cyg_sst_funs,
???????????????? 0,???????????????????? // Flags
???????????????? CYGNUM_FLASH_BASE,???? // Start
???????????????? CYGNUM_FLASH_BASE + (FLASH_BLOCK_SIZE * FLASH_NUM_REGIONS *
CYGNUM_FLASH_SERIES) - 1,??? // End
???????????????? 1,???????????????????? // Number of block infos
???????????????? cyg_flash_sst_block_info,
???????????????? NULL?????????????????? // priv
??? );
#endif
// ------------------------------------------------------------------------
// EOF flash_ea2468.c
?
I had not the EA2468 board, my platform is:
??? Platform: LPC2478 Board (ARM7TDMI-S)
??? RAM: 0xa0000000-0xa2000000 [0xa000aac8-0xa1ffc000 available]
??? FLASH: 0x81000000-0x811fffff, 512 x 0x1000 blocks
?
Should change the MACRO
??? #define CYGPKG_DEVS_FLASH_SST_39VF3201
to
??? #define CYGPKG_DEVS_FLASH_SST_39VF1601
---------------------------------------------------------------------->8

My comments: as I can see there is fitted other flash parts on his board,
so, I do not think that you must change own definition, just define
CYG_FLASH_DRIVER properly acording the used FLASH's "geometry".


Sergei
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