Very Computer

by **Radek Solt** » Tue, 28 Aug 2001 00:59:24

Hello,
I'm new to the group and to TI's DSP, but not to the DSP at all -
I had to do with Motorola's DSP 56002 and 56302
and I've got a question:

Can I build a JTAG interface that is compatible with TI's Code
Composer Studio?

I've learned that the C6701 PCI EVM emulates JTAG in an Altera PLD -
I have all the tools for programming such a PLD, but I certainly
cannot make a PCI card. However I know there are also JTAG tools for
PC parallel port...

Thanks in advance,

Radek Soltys

by **Mike Rosin** » Wed, 29 Aug 2001 03:03:12

> Hello,
> I'm new to the group and to TI's DSP, but not to the DSP at all -
> I had to do with Motorola's DSP 56002 and 56302
> and I've got a question:

> Can I build a JTAG interface that is compatible with TI's Code
> Composer Studio?

> I've learned that the C6701 PCI EVM emulates JTAG in an Altera PLD -
> I have all the tools for programming such a PLD, but I certainly
> cannot make a PCI card. However I know there are also JTAG tools for
> PC parallel port...

In principle, yes. there are several third party units available
that all work with CC, so the interface must be available somewhere.

In practice, it's going to be non-trivial.

Patience, persistence, truth,
Dr. mike

by **Herma** » Thu, 30 Aug 2001 11:27:54

Well, we have made a JTAG interface once using a PC parallel port, but some
pins behave funny, so you need at least some schmitt inverter chips as
drivers. The software is easiest to do under a simple OS such as DOS.
Doing this kind of thing under windoze or Linux is difficult.

You'll need loads of patience...

Cheers,

Herman

> Hello,
> I'm new to the group and to TI's DSP, but not to the DSP at all -
> I had to do with Motorola's DSP 56002 and 56302
> and I've got a question:

> Can I build a JTAG interface that is compatible with TI's Code
> Composer Studio?

> I've learned that the C6701 PCI EVM emulates JTAG in an Altera PLD -
> I have all the tools for programming such a PLD, but I certainly
> cannot make a PCI card. However I know there are also JTAG tools for
> PC parallel port...

> Thanks in advance,

> Radek Soltys

by **Suresh** » Thu, 30 Aug 2001 20:31:52

Hai,

Designing a JTAG needs lots of timing constrains to be taken into
consideration. A JTAG de*'s totaly depends on its software as
JTAG doesnt have and processor inside it, so you shoud be good in
developing drivers. If you want to develop this for your project
better purchase a JTAG available in market as lots of de*'s are
available

JS

by **Brian Carlso** » Thu, 30 Aug 2001 21:24:56

The Altera CPLD does not emulate the JTAG. The JTAG is
handled by a JTAG test bus controller (TBC) that can be easily
mapped to any interface such as ISA or a parallel port.
The TI part that does this is SN74ACT8990. This part handles
all the scan control and timing so you only write 16-bit words to registers
it and it does the work. The CCS drivers talk to this device through
the respective boards' interfaces.

Brian

> Hello,
> I'm new to the group and to TI's DSP, but not to the DSP at all -
> I had to do with Motorola's DSP 56002 and 56302
> and I've got a question:

> Can I build a JTAG interface that is compatible with TI's Code
> Composer Studio?

> I've learned that the C6701 PCI EVM emulates JTAG in an Altera PLD -
> I have all the tools for programming such a PLD, but I certainly
> cannot make a PCI card. However I know there are also JTAG tools for
> PC parallel port...

> Thanks in advance,

> Radek Soltys

by **Radek Solt** » Fri, 21 Sep 2001 17:09:19

Thank you, list members!
I didn't mean to design such an interface, but was looking for
some available schematics and drivers.
I've bought a TI 6701 PCI EVM with JTAG at ebay.com at a bargain price
and seen parallel port JTAG XDS510 emulator pod there too.

Radek

> The Altera CPLD does not emulate the JTAG. The JTAG is
> handled by a JTAG test bus controller (TBC) that can be easily
> mapped to any interface such as ISA or a parallel port.
> The TI part that does this is SN74ACT8990. This part handles
> all the scan control and timing so you only write 16-bit words to registers
> it and it does the work. The CCS drivers talk to this device through
> the respective boards' interfaces.

> Brian

Very Computer

Q: New to the group - Can I build a JTAG interface?

Q: New to the group - Can I build a JTAG interface?

Q: New to the group - Can I build a JTAG interface?

Q: New to the group - Can I build a JTAG interface?

Q: New to the group - Can I build a JTAG interface?

Q: New to the group - Can I build a JTAG interface?

Q: New to the group - Can I build a JTAG interface?