Reply by Amontec, Larry●November 16, 20042004-11-16
Clint Sharp wrote:
> Hi All, I have a router that has had a flash ROM problem, to the extent
> that it gets stuck before it properly initialises (proven by ROM
> substitution) to a point where I can replace the corrupt contents. The
> router is MPC850 based and has a JTAG port on the board, can I use this
> port/BDM mode to read out a good ROM and re-flash the corrupted ROM? If
> not, can you point me in the direction of a DIY programmer that will
> handle Sharp LH28F016 chips?
Hi,
Our Chameleon POD (a reconfigurable dongle) can works as Macraigor Raven
Emulator, as Macraigor Wiggler, as P&E Micro BDM interface. In fact we
are able to clone all the popular BDM & JTAG interface emulators working
on the parallel port.
Also, you will be able to do your own custom EPP/ECP application, since
Amontec gives all documentation of the POD, including schematic and VHDL
examples.
You just have to buy Chameleon POD, all pre-configurations are coming
for FREE with our Chameleon POD Programmer tool.
It should be a nice solution for you.
For more info, please goto www.amontec.com
Kind regards,
Laurent Gauch
Reply by Allan R. Batteiger●November 15, 20042004-11-15
Clint Sharp <clint@clintsmc.demon.co.uk> wrote in news:xyoK07HZESmBFwq5
@clintsmc.demon.co.uk:
Clint
From what I can tell the only interface anyone has to program flash or
control the chip is BDM. The spec may indicate JTAG, but the jtag may be
limited functionality, or no one has developed any software to use it
instead of the BDM. The two units I have used are Macraigor and PE Micro
both work using BDM.
Allan
Reply by Clint Sharp●November 15, 20042004-11-15
In message <to5md.3019151$yk.469793@news.easynews.com>, Allan R.
Batteiger <arb@rtsi.com> writes
>Last time I check the MPC850 has BDM not JTAG. PE Micro make a PPC BDM
>device that should do the job. You need to check about the flash chips to
>be sure.
Yep. Doesn't support my flash.
>
>Allan
So, I've misread this PDF?
http://www.freescale.com/files/netcomm/doc/app_note/AN2387.pdf
Or is it inaccurate? I'm new to JTAG but remember BDM from earlier
chips...
From what I can gather, I can either use a 'wiggler' type device (if it
is JTAG compliant) and use the target device I/O pins to pretend to be a
programmer or download a boot loader to the device and load the code via
a serial port... neither of which seems attractive as all the devices
that support my CPU are way more expensive than the router I want to
re-flash.
There are a couple of freeware offerings that look promising but it
would be really nice if someone could give me a heads-up or point me at
something they know to work. Basically, the router is an Efficient
networks 5861 DSL device with an XPC850 chip and a Sharp LH28F016 flash
--
Clint Sharp
Reply by Allan R. Batteiger●November 15, 20042004-11-15
Clint Sharp <clint@clintsmc.demon.co.uk> wrote in
news:idV+vEEho9lBFwDe@clintsmc.demon.co.uk:
> Hi All, I have a router that has had a flash ROM problem, to the extent
> that it gets stuck before it properly initialises (proven by ROM
> substitution) to a point where I can replace the corrupt contents. The
> router is MPC850 based and has a JTAG port on the board, can I use this
> port/BDM mode to read out a good ROM and re-flash the corrupted ROM? If
> not, can you point me in the direction of a DIY programmer that will
> handle Sharp LH28F016 chips?
Last time I check the MPC850 has BDM not JTAG. PE Micro make a PPC BDM
device that should do the job. You need to check about the flash chips to
be sure.
Allan
Reply by Clint Sharp●November 14, 20042004-11-14
Hi All, I have a router that has had a flash ROM problem, to the extent
that it gets stuck before it properly initialises (proven by ROM
substitution) to a point where I can replace the corrupt contents. The
router is MPC850 based and has a JTAG port on the board, can I use this
port/BDM mode to read out a good ROM and re-flash the corrupted ROM? If
not, can you point me in the direction of a DIY programmer that will
handle Sharp LH28F016 chips?
--
Clint Sharp