Connecting DM642 EVM board to the PC

Hi Everybody!!!

Just got a new kit from Spectrum Digital with TMS320DM642 chip... model
TMDSEVM642 with TVP Video Decoders... (EVMDM642 - 720 MHz version) and I
have some doubts about plugging it into the PC...

First: what exactly is JTAG? what is it for?
what I understood is the following: I need a JTAG emulator to use the
board with pc (like this one: http://emulators.spectrumdigital.com/)...
this emulator can use the parallel port or USB (they cost a lot!!!)... but
if I plug it directly to PCI slot, or use the ethernet port, I don't need
this emulator...

Is that it?

Another thing: does anyone know where to find more document sources for
this equipment?

Thanks a lot!!!
Bye!
		
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julianoys wrote:
> 
> what I understood is the following: I need a JTAG emulator to use the
> board with pc

Yes. The JTAG emulator lets you program, control and debug your DSP
system.

> this emulator can use the parallel port or USB (they cost a lot!!!)... but
> if I plug it directly to PCI slot, or use the ethernet port, I don't need
> this emulator...

No. You still need to use JTAG for programming and debugging. Your
program can use the PCI or Ethernet in any way it likes, but without
JTAG you can't get your program onto the target.

Typically, you would have your card in one PC, and run your compiler/
debugger (Code Composer Studio) on another PC connected to the JTAG
emulator. The "target" system (DSP+PC) would run your software while
the "host" PC would be used for debugging.

> Another thing: does anyone know where to find more document sources for
> this equipment?

TI produce a huge amount of documents and app notes. www.dspvillage.com
would be a good place to start.

Cheers

mark-r

-- 
"Let's meet the panel. You couldn't ask for four finer comedians -
so that answers your next question..."
 -- Humphrey Lyttleton

>TI produce a huge amount of documents and app notes. www.dspvillage.com
>would be a good place to start.
>
>Cheers
>
>mark-r

To be more precise try these documents:

1] Emulation Fundamentals for TI 's DSP Solutions (Rev. B) 
   (spra439b.htm, 0 KB)
   16 May 2002  Abstract

2] spra823a.pdf


--Bhooshan

		
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First of all, thanks mark-r and Bhooshan for your replies...

I've already worked with TMS320VC5402 DSK... I've just checked some info,
and I've found out that 

this DSK has an embedded JTAG emulator... The DSK board had a parallel
connector from which I used a cable (included in the DSK package) and
connected to the pc parallel port for uploading and debuggind 

procedures through Code Composer Studio as told in the DSK manual...

"The DSK provides embedded JTAG emulation that is accessible via the
IEEE-1284 parallel port 

interface, as well as support for an external XDS510 emulator.  The
selected JTAG method is user-

configurable via  DIP switch 1. TMS320C5402 DSK Help (SPRH075A)"

Now, this new DSP board I'm working (TMS320DM642 Evaluation Module with
TVP Video Decoders) seems to 

have no embedded JTAG emulator, just a JTAG (14 pin) connector...

"A typical development system includes a target board, a JTAG emulator and
a copy of TI's Code 

Composer Studio IDE. Developer Starter Kits (DSKs) include entry-level
versions of an embedded JTAG 

emulator and Code Composer Studio that only work with the DSK board
itself. Evaluation modules (EVMs) 

require an external JTAG emulator and full Code Composer Studio and are
suitable for engineers 

designing their own hardware. http://c6000.spectrumdigital.com/"

This would mean I need to buy a JTAG Emulator...
My doubt is: The EVM board have a PCI slot connector, an Ethernet
connector and a serial port... (I 

really don't know yet what they are used for...) couldn't I use one of
them along with Code Composer 

Studio and use it without needing to buy an external JTAG Emulator? I
mean... Do I need to buy a JTAG Emulator??? I need to begin working with
this device, but I don't even know how to plug it into the pc!!!

Thanks for the attention guys!!!
		
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Hello there again...

I've done some more research over the net and found some interesting posts
about my doubt about using the PCI interface instead of buying a JTAG
emulator... if I understood them correctly and I'm not saying studid
things...

They account for a DM642 PCI loader... one of them says that Texas has a
library that does that... could someone please explain about this for
me???

http://www.dsprelated.com/groups/c6x/show/3789.php
http://www.dsprelated.com/groups/c6x/show/3399.php
http://61ic.com/download/DSP/TI/200501/606.html
http://focus.ti.com/catalog/docs/thirdpartysoftwarefolder.tsp?softwareId=4459

Thanks!!!
		
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