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

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

On Tue, 2 Mar 2010, Sergei Gavrikov wrote:

[Add Youqiang Zou to CC]

> 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

        Youqiang> Refered to the arm_aim711_flash.c, I?changed?the
        Youqiang> flash_ea2468.c as the below list.

        Youqiang> // The EA LPC2468 OEM board has one SST 39VF3201 part
        Youqiang> #define CYGNUM_FLASH_INTERLEAVE (1)
        Youqiang> #define CYGNUM_FLASH_SERIES     (1)
        Youqiang> #define CYGNUM_FLASH_WIDTH      (16)
        Youqiang> #define CYGNUM_FLASH_BASE       (0x80000000)

[drop some implementation details]

        Youqiang> I had not the EA2468 board, my platform is:
        Youqiang> Platform: LPC2478 Board (ARM7TDMI-S)
        Youqiang> RAM: 0xa0000000-0xa2000000 [0xa000aac8-0xa1ffc000 available]
        Youqiang> FLASH: 0x81000000-0x811fffff, 512 x 0x1000 blocks

I assume that is the real RedBoot's output and that looks like that
CYGNUM_FLASH_BASE address was pointed on 0x81000000. Other chip select
pin? So, check that too. Also, CYGNUM_FLASH_WIDTH says about 16-bit.

They said here
http://ecos.sourceware.org/docs-latest/ref/ecos-flash-library.html 
Will Robinson!


Sergei
--

> 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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