JTAG interface board

[nick loeve]

Hi

On Thu, Oct 16, 2008 at 3:49 PM, Pete <biovore at gmail.com> wrote:
> On Thu, Oct 16, 2008 at 9:22 AM, Leo McManus <LeoMcManus at 3rdrootdsp.com>
> wrote:
>>
>> Am looking at buying a Freerunner for use on a embedded course.
>>
>> When I looked at buying last year the phone came with a developer
>> board...and a pretty case!
>>
>> If I buy a freerunner now it will not come with the interface board.
>>
>> What restrictions will this put on my development. Will I be unable to
>> modify the U-Boot code. Can I flash all the blocks within the flash?
>>
>> TA
>>
>> Leo
>>
>> "In a study, scientists report that drinking beer can be
>> good for your liver. I'm sorry, did I say 'scientists'?
>> I meant Irish people."
>>
>>
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>>
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>
>
> You can update uboot and install new kernels and rootfs using openmoko's
> dlf-util program.  But if you mess up programming uboot, your going to brick
> you phone.

You can flash u-boot in NAND via dfu-util, but you can only alter
u-boot in NOR with the debug board. So without the board you can still
play around with bootloader, kernel and rootfs, and if you stuff up,
then the u-boot in NOR will still be available to use to reflash and
recover.

Cheers

>
> They sell a JTAB / serial port board for the freerunner.  This board is nice
> because it can work on any arm system that has the 20 pin JTAG connector.
> Openmoko still sells the "Dboard" on the US direct site
> http://us.direct.openmoko.com/.  Basicly its a FTDI high speed usb to serial
> interface chip wired up to be a JTAG. Its nice because its a simple open
> jtag system, that programs like xilinx and openOCD can operate.
>
> --
> Peter Fetterer
> KB3GTN
>
> The force is like duct tape.
> It has a light side and a darkside
> and binds the universe together.
>
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>
>



-- 
Nick Loeve