Re: minicom returning invalid AT ... command

Hi Philipp

pHilipp Zabel wrote:
> On 10/16/07, Brian Green <brian.green_at_bdgreen.info> wrote:
>> Hi
>>
>> I'm trying to re-installed Mobile 5.0 to my hx4700.
>>
>> Currently the hx4700 has the SDG Systems (1.2.4.hx4700) bootloader in
>> ROM, with GPE 2.7 Linux 2.6.16.hh2 - Familiar v 0.8.4.
>>
>> I believe I still have the original image created by dd back in 2006
>> which I have just restored, using dd, to a freshly formatted 1GB SD.
>>
>> When I try to execute s2d, minicom gives:
>>
>> "
>> Welcome to minicom 2.2
>>
>> OPTIONS: I18n
>> Compiled on Nov 26 2006, 03:37:56.
>> Port /dev/ttyUSB0
>>
>> Press CTRL-A Z for help on special keys
>>
>> Invalid command : AT V1 X4 &c1 E1 Q0
>
> That's ok. "AT V1 X4 &c1 E1 Q0" is what minicom sends to initialize
> the modem on the other end (see minicom -s -> modem & dialing -> init
> string), and the htc bootloader obviously doesn't understand AT
> commands.
>
>> For a help screen, use command ? or h
>> USB>
>> "
>>
>> Entering the command s2d gives:
>>
>> "
>> Invalid command : s2d
>> For a help screen, use command ? or h
>> "
>
> And that's ok, too, because in the bootloader version shipped with the
> hx4700, the s2d command is not implemented. The only way to put that
> image back into flash is to put the SD card in and have the bootloader
> recognize it automatically on startup (it says 'press power to flash'
> or similar if the checksums are correct).
> Or maybe soon with my small USB flashing tool
> (http://www.linuxtogo.org/~ph5/htc-tools/), if somebody supplies the
> hx4700 wince partition list for htc-flash.c and isn't afraid to test.
> Patches welcome :)
>

OK. I started the SDG bootloader with Contacts, Inbox, and Reset.

I get the SDG Systems Embedded Reflash Utility screen. Then "Can't read
control file". Which is repeated when I press Record.

So, the checksum is wrong?

>> I didn't receive the "Invalid command : AT ..." error message when I was
>> setting up and testing the rig, and pressing Enter would immediately
>> produce the (another) USB> prompt - I'm sure I haven't changed any settings.
>>
>> Any advice on what's gone wrong, or what is the correct settings for
>> minicom?
>>
>> Similarly, is there any way I can verify the image before I commit the s2d!
>
> There is a checksum somewhere in the header. Is there somebody on the
> list who knows something more specific about that?
>
> cheers
> Philipp
Received on Tue Oct 16 2007 - 15:07:24 EDT