Re: minicom returning invalid AT ... command - CLOSED

On 10/17/07, Brian Green <brian.green_at_bdgreen.info> wrote:
> pHilipp Zabel wrote:
> > On 10/17/07, Sébastien Lorquet <squalyl_at_gmail.com> wrote:
> >> I think that d2s does not cares about SD card format. It just writes a
> >> header and dump data from flash to SD card's sectors.
> >> So you don't have to format anything, or create any partition on your card!
> >> just dd the original saved data on the card, it does not follow any
> >> partition/FS format. you have to dd it to /dev/sdb, not /dev/sdb1 we're ok?
> >>
> >> I found somewhere on hh.org hx-4700 wiki that a saved wince4.2 image was
> >> around ~130 MB, so even if you transfer the first 256 MBs from your 1GB card
> >> to a new 256MB card, it will work without problem.
> >
> > Exactly, the hx4700 flash is 128MB and d2s called without parameters
> > copies everything except the first 256k (HTC bootloader) onto the SD
> > (plus a small header of 412 bytes and 4 bytes footer IIRC). So 130MB
> > is just an approximate value > 412+133955584+4 bytes.
> >
> > The header format can be seen in the script at
> > http://www.linuxtogo.org/~ph5/hx4700/wince.
> > It starts with:
> > 16 bytes "ROADSTER ", then
> > 16 bytes "0000000000000000",
> > 16 bytes "1.01 ",
> > then 336 bytes with (to me) unknown purpose, mostly 0x00, except for
> > two words in my d2s images, then
> > 4 bytes "HTCS",
> > 8 bytes "A0040000", <-- this is the start adress (256k bytes into
> > flash memory, after the bootloader)
> > 8 bytes "07FC0000", <-- this is the size of the data to be copied,
> > 133955584 bytes)
> > 8 bytes "4CF096E8", <-- this is most likely incorrect, should be the
> > crc32 checksum of the following data.
> > Then the actual image contents (133955584 bytes) follow, and then the footer,
> > 4 bytes "HTCE".
> >
> > I'm not sure, but it might be that in the unknown data in the header
> > the CID of the mmc/sd card is encoded, so maybe the image is only
> > recognized if you use the same card for backup and restore. Did
> > anybody successfully backup to one card and restore from another?
> >
> > cheers
> > Philipp
>
> Thanks everybody!
>
> I managed to verify that at least the header of my img file and the ROM
> update 1.10 (SP29841.exe) where essentially equivalent - and, this gave
> me confidence to continue ...
>
> dd'd (my, original) img file to my 1GB SD card ("/dev/sdb" - thanks,
> Sébastien), and reset the hx4700. A reboot and up pops Win Mobile. It
> takes a long time but a 1GB SD card is OK.
>
> Similarly, upgrade to WM 5.0 went without hitch.
>
> The http://www.linuxtogo.org link was crucial - why doesn't it Google?

No idea, maybe the linuxtogo.org user directories are not spidered? Or
ranking low because it's not HTML?
You could put this information in a wiki somewhere, or maybe Google
indexing this mailing lists's archives will be good enough :)

cheers
Philipp
Received on Wed Oct 17 2007 - 15:56:29 EDT