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

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

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On Wed, Feb 24, 2010 at 08:11:07AM -0600, Viren wrote:
> hi,
> In my board, SST39VF3201 flash is available.
> and entry of this part is also in this file -->flash_sst_39vfxxx.inl
> Then also it gives same error.

Just a guess (I doubt, but). It may be bus width issue or it may be a
bus timing...

It seems for me, there is an additional place to get info in HAL setup:
hal/arm/lpc24xx/ea2468/current/src/ea2468_misc.c

BTW, you can build eCos `flash1' test and walk through out SST flash
init sections in GDB (using the built RedBoot without FLASH support):

;# chdir in a suitable place
ecosconfig new ea2468
ecosconfig add flash
ecosconfig tree
make
make -C io/flash/current tests 

arm-eabi-nm install/tests/io/flash/current/tests/flash1|grep flash

It's good to know for break points (useful bps: cyg_flash_get_info,
cyg_flash_init).

Then try to investigate
arm-eabi-gdb -nx install/tests/io/flash/current/tests/flash1


Sergei
-- 

> Thanks,
> Viren
> 
> 
> 
> 
> > Please, do not top-post!
> > http://en.wikipedia.org/wiki/Top_posting
> >
> > On Wed, Feb 24, 2010 at 05:02:09AM -0600, viren.dobariya@aftek.com wrote:
> >> hi,
> >>   I check in sst_init function but my prog don't reach there.
> >> so, i debug whole code and findout from where it generates error.
> >>
> >> it returns from cyg_"flash_init function" from
> >> "ecos-3.0/packages/io/flash/v3_0/src/flash.c".
> >>
> >> In cyg_flash_init() function:
> >>
> >> #if (1 == CYGHWR_IO_FLASH_DEVICE)
> >>   // Make sure there is one device, otherwise we could end up
> >>   // accessing a non-existent cyg_flash_dev structure.
> >>
> >>    if (&(cyg_flashdevtab[0]) == &cyg_flashdevtab_end) {
> >>         return CYG_FLASH_ERR_INVALID;
> >>   }
> >>
> >> >From above loop, it always return CYG_FLASH_ERR_INVALID.
> >>
> >> so that's why i get error given below.
> >> FLASH: driver init failed: Invalid FLASH address.
> >>
> >> how to solve this error?
> >
> > As Uwe said, you have to check the real Manufacturer/Device IDs for your
> > flash parts.
> >
> > So, first, take a glass and know what is "your" SST flash IC variant
> > is fitted on the board. Download data sheet and know the Device ID code
> > for the IC. If the codes will be different from the "Uwe's" parts, you
> > have to change the SST flash define here:
> >
> > devs/flash/arm/ea2468/current/src/flash_ea2468.c
> >
> > The available SST 39VFXXX parts (=defines) are described here:
> >
> > devs/flash/sst/39vfxxx/current/include/flash_sst_39vfxxx.inl
> >
> >
> > I hope this help.
> >
> > Sergei
> > --
> >
> >> please reply me.
> >>
> >> Thanks,
> >> Viren
> >
> >> > Hi,
> >> >
> >> > the EA2468 target uses the generic CYGPKG_DEVS_FLASH_SST_39VF3201
> >> flash
> >> > driver. You should check, if the flash device returns the proper
> >> > manufacturer ID (0x00BF) and device ID (0x235B) in function sst_init()
> >> > in flash_sst_39vfxxx.inl. Maybe the flash part changed?
> >> >
> >> > Uwe
> >> >
> >> > --
> >> > Before posting, please read the FAQ:
> >> http://ecos.sourceware.org/fom/ecos
> >> > and search the list archive:
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> >
> > --
> > Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
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> >
> >
> 

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