With the 2126x sharcs, I've noticed that the JTAG can fail if the
processor doesn't boot up properly.
The only way I get reliable operation is to power the board up, make
sure the processor got a good reset, and then plug in the emulator.
--- In a..., "lyngan103" wrote:
>
> --- In a..., Mike Rosing wrote:
> >
> > On Mon, 22 Jan 2007 ly_ngan@ wrote:
> >
> > > Hi all,
> > >
> > > I have some problems about the connection between JTAG header (2x7
> > >pins) and ADI BF533. I had followed the schematics provided by ADI,
> in
> > >which construct the JTAG header from BF533 (EMU, TDO, TDI, TRST and
> TCK
> > >pins) using two ADG774ABRQ.
> >
> > I assume you have TMS as well?
> >
> > >
> > > However, I failed to connect my board to the USB ICE emulator, an
> error code 0x80048008 occurs.
> > >
> > > Did anyone try the ADI JTAG header connection before? Could you
> please
> > >give me some comments or suggestions about my problems?
> >
> > I've not connected to blackfin but to plenty of other adi parts. The
> > lines need to be really clean. Put a scope on it and make sure you
> don't
> > have any cross talk from other signals. Make sure your ground
> connection
> > is really solid between ice and target. It's not as easy as it looks,
> you
> > need some care to ensure the jtag is happy.
> >
> > Patience, persistence, truth,
> > Dr. mike
> >
> Thank you Dr. Mike.
>
> Yes, TMS is connected as well.
>
> The TMS, TCK and TDI signal pins from BF533 are pulled-up through a 10K
> resistor, whereas the TRST pin is pulled-down by a 4K7 resistor.
>
> The wiring between my DSP and JTAG header are kept as short as possible
> now, so I am wondering are there any problems in my connection (which
> pin should be pull-up or pull-down).
>
> I will check the wiring and grounding conditions of my board as you
> suggested.
>
> Please give me further comments any time. Thank you so much.
>
> Best Regards,
> lyngan
> Start a New Thread

--- In a..., Mike Rosing wrote:
>
> On Mon, 22 Jan 2007 ly_ngan@... wrote:
>
> > Hi all,
> >
> > I have some problems about the connection between JTAG header (2x7
> >pins) and ADI BF533. I had followed the schematics provided by ADI,
in
> >which construct the JTAG header from BF533 (EMU, TDO, TDI, TRST and
TCK
> >pins) using two ADG774ABRQ.
>
> I assume you have TMS as well?
>
> >
> > However, I failed to connect my board to the USB ICE emulator, an
error code 0x80048008 occurs.
> >
> > Did anyone try the ADI JTAG header connection before? Could you
please
> >give me some comments or suggestions about my problems?
>
> I've not connected to blackfin but to plenty of other adi parts. The
> lines need to be really clean. Put a scope on it and make sure you
don't
> have any cross talk from other signals. Make sure your ground
connection
> is really solid between ice and target. It's not as easy as it looks,
you
> need some care to ensure the jtag is happy.
>
> Patience, persistence, truth,
> Dr. mike
>
Thank you Dr. Mike.

Yes, TMS is connected as well.

The TMS, TCK and TDI signal pins from BF533 are pulled-up through a 10K
resistor, whereas the TRST pin is pulled-down by a 4K7 resistor.

The wiring between my DSP and JTAG header are kept as short as possible
now, so I am wondering are there any problems in my connection (which
pin should be pull-up or pull-down).

I will check the wiring and grounding conditions of my board as you
suggested.

Please give me further comments any time. Thank you so much.

Best Regards,
lyngan Start a New Thread

On Mon, 22 Jan 2007 l...@hotmail.com wrote:

> Hi all,
>
> I have some problems about the connection between JTAG header (2x7
>pins) and ADI BF533. I had followed the schematics provided by ADI, in
>which construct the JTAG header from BF533 (EMU, TDO, TDI, TRST and TCK
>pins) using two ADG774ABRQ.

I assume you have TMS as well?

>
> However, I failed to connect my board to the USB ICE emulator, an error code 0x80048008 occurs.
>
> Did anyone try the ADI JTAG header connection before? Could you please
>give me some comments or suggestions about my problems?

I've not connected to blackfin but to plenty of other adi parts. The
lines need to be really clean. Put a scope on it and make sure you don't
have any cross talk from other signals. Make sure your ground connection
is really solid between ice and target. It's not as easy as it looks, you
need some care to ensure the jtag is happy.

Patience, persistence, truth,
Dr. mike Start a New Thread

Hi all,

I have some problems about the connection between JTAG header (2x7 pins) and ADI BF533. I had followed the schematics provided by ADI, in which construct the JTAG header from BF533 (EMU, TDO, TDI, TRST and TCK pins) using two ADG774ABRQ.

However, I failed to connect my board to the USB ICE emulator, an error code 0x80048008 occurs.

Did anyone try the ADI JTAG header connection before? Could you please give me some comments or suggestions about my problems?

Thank you so much.

Look forward to see you reply.

Best Regards,
lyngan Start a New Thread