Chris
Sat Mar 15 17:07:02 PDT 2008
That is completely up to the existing bootloader. The PXA255 knows nothing
and does nothing but execute at zero at boot. Obviously your hardware has
flash at that address and some sort of Unix/Linux bootloader aleady there.
What the behavior of that bootloader is we can't tell you. Can you use it
to write eboot.bin to Flash? Again, we don't know (I suspect it could be
done if you can use it to update the Unix bootloader).
Files on a CF card are purely pulled in by the bootloader - the processor
has no concept of a "CF card" let alone a FAT file system. You need to
either get more info on the bootloader you have and its behavior, or just
JTAG down your CE bootloader. Will that bootloader pull files of a CF card?
Again, we can't say. Depends on what the code for your bootloader does.
--
Chris Tacke, Embedded MVP
OpenNETCF Consulting
Giving back to the embedded community
http://community.OpenNETCF.com
"garlic" <garlic@yahoo.com.sg> wrote in message
news:0B9DFD8C-28D0-460D-9B24-D692047540C5@microsoft.com...
> But i am able to update a unix os onto it using a CF card. I thought the
> Bootloader in the CF card will overright the BL in the Flash, why can't it
> do
> that.
> what are the files that should reside in the CF card?
>
>
>
> "Chris Tacke, eMVP" wrote:
>
>> Yes, JTAG is likely the only way to get the bootloader onto it (unless it
>> already has a bootloader which can update itself - kind of a Catch-22
>> though.
>>
>>
>> --
>>
>> Chris Tacke, Embedded MVP
>> OpenNETCF Consulting
>> Giving back to the embedded community
>>
http://community.OpenNETCF.com
>>
>> "garlic" <garlic@yahoo.com.sg> wrote in message
>> news:B0449F5B-6F74-40FA-93DF-DDAD93B29788@microsoft.com...
>> >
>> > I know they are end of life next year.
>> > It is an abandon board, use to run on Unix, thus no WinCE BSP
>> >
>> > I try communicating the board with RS232, Ethernet but to no avail.
>> > I thought of getting JTAG to download WinCE support bootloader into
>> > Flash
>> > .
>> > Is this the only approach
>> >
>> >
>> >
>> > Thanks
>> > Alvin
>> >
>> >
>> > "Bruce Eitman [eMVP]" wrote:
>> >
>> >> If you are going to change the error messages, you should note that so
>> >> we
>> >> don't waste time reviewing you change thinking it is the problem.
>> >>
>> >> Why aren't you using a PXA255 BSP?
>> >> Why are you starting a project using a PXA255, isn't it end of life
>> >> really
>> >> soon? Or are you just experimenting?
>> >>
>> >> --
>> >> Bruce Eitman (eMVP)
>> >> Senior Engineer
>> >> beitman AT applieddata DOT net
>> >>
>> >> Applied Data Systems
>> >> www.applieddata.net
>> >> An ISO 9001:2000 Registered Company
>> >> Microsoft WEP Gold-level Member
>> >>
>> >> "garlic" <garlic@yahoo.com.sg> wrote in message
>> >> news:174A967A-B34D-4FDF-8BE2-25DE4AE63951@microsoft.com...
>> >> > Is there a startup.s [entry function for BL] or BL files for Pxa255
>> >> > that i
>> >> > can download.
>> >> > I did sysgen but i have error,
>> >> > ya, you are right, _winCEroot env path is C:\Wince500. I make that
>> >> > up
>> >> > :>
>> >> >
>> >> >
>> >>
>> >>
>> >>
>>
>>
>>