Lpc2000

Hello people!

I'm new in this group, and new in LPC2000 family.
I need help to build a serial JTAG for this family, is this possible?
I only find parallel JTAG still now.

Tanks!


--
Eduardo Peters
from Brazil

----- Original Message ----- 

From: "P e t e r s" <dudupeters@...>
To: <lpc2000@yahoogroups.com>
Sent: Thursday, February 23, 2006 2:00 PM
Subject: [lpc2000] JTAG Serial


> Hello people!
>
> I'm new in this group, and new in LPC2000 family.
> I need help to build a serial JTAG for this family, is this possible?
> I only find parallel JTAG still now.

It could be done, but you'd have to develop your own software. It wouldn't 
be all that popular, given the trend towards eliminating serial ports from 
laptops.

Leon

I have to agree with Leon even though I have built my
own serial based JTAG debugger.  Is USB an option for
you?  For me, I just wanted something that would work
with my laptop and using a serial device with the FTDI
USB 2 Serial adapters has been pretty successful for
me in the past.  I am now in the process of getting
rid of the serial component of my JTAG debugger and
just using USB.

Pros of Serial:
-I had lots of fun learning how to implement the JTAG
interface (I used an Ubicom SX28 chip to bit bang out
the necessary JTAG signals and talk to the PC via the
UART) and building a command line debugger that has
(...or will have) the features that I want.

Cons of Serial:
-Other interfaces (USB and Parallel) are much faster. 
When you are debbugging something, the last thing you
want to be doing is waiting around for the debugger to
do its thing.
-You will most likely have to build your own interface
and debugger or make some major changes to an existing
JTAG interface hook into GDB.
-If you don't want to learn all the details of how the
ARM7 core is debugged using JTAG, then the time and
effort required to build your own serial based
debugger would be complete agony :)


--- Leon Heller <leon.heller@...> wrote:
> It could be done, but you'd have to develop your own
> software. It wouldn't 
> be all that popular, given the trend towards
> eliminating serial ports from 
> laptops.
> 
> Leon 


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Look this
http://www.olimex.cl/product_info.php?products_id=28

What you think about this JTAG.
Still same problems, how don't write in flash, I think that is
possible work with him.
I buy this JTAG yesterday, and when I receive him, will be test and
post here the results.

On 2/23/06, Stanley Frederickson <robostanley@...> wrote:
> I have to agree with Leon even though I have built my
> own serial based JTAG debugger.  Is USB an option for
> you?  For me, I just wanted something that would work
> with my laptop and using a serial device with the FTDI
> USB 2 Serial adapters has been pretty successful for
> me in the past.  I am now in the process of getting
> rid of the serial component of my JTAG debugger and
> just using USB.
>
> Pros of Serial:
> -I had lots of fun learning how to implement the JTAG
> interface (I used an Ubicom SX28 chip to bit bang out
> the necessary JTAG signals and talk to the PC via the
> UART) and building a command line debugger that has
> (...or will have) the features that I want.
>
> Cons of Serial:
> -Other interfaces (USB and Parallel) are much faster.
> When you are debbugging something, the last thing you
> want to be doing is waiting around for the debugger to
> do its thing.
> -You will most likely have to build your own interface
> and debugger or make some major changes to an existing
> JTAG interface hook into GDB.
> -If you don't want to learn all the details of how the
> ARM7 core is debugged using JTAG, then the time and
> effort required to build your own serial based
> debugger would be complete agony :)
>
>
> --- Leon Heller <leon.heller@...> wrote:
> > It could be done, but you'd have to develop your own
> > software. It wouldn't
> > be all that popular, given the trend towards
> > eliminating serial ports from
> > laptops.
> >


--
Eduardo Peters
Canoinhas-SC
0 47 8405 0331
Skype: dudupeters
MSN: peterseduardo@...
Google Talk: dudupeters@gmail.com

> Look this
> http://www.olimex.cl/product_info.php?products_id=28
> 
> What you think about this JTAG.
> Still same problems, how don't write in flash, I think that is
> possible work with him.
> I buy this JTAG yesterday, and when I receive him, will be test and
> post here the results.


This is a "wiggler" clone.
Using the correct software, it *is* possible to program the FLASH-ROM 
with it.

An example for correct software would be Rowley Crossworks.
It just works.

	

	
		
___________________________________________________________ 
Telefonate ohne weitere Kosten vom PC zum PC: http://messenger.yahoo.de

But in image, seem that is a serial port, e I never saw a "wiggler" serial!
This is possible?

On 2/24/06, haare_in_der_dusche <haare_in_der_dusche@yahoo.de> wrote:
> > Look this
> > http://www.olimex.cl/product_info.php?products_id=28
> >
> > What you think about this JTAG.
> > Still same problems, how don't write in flash, I think that is
> > possible work with him.
> > I buy this JTAG yesterday, and when I receive him, will be test and
> > post here the results.
>
>
> This is a "wiggler" clone.
> Using the correct software, it *is* possible to program the FLASH-ROM
> with it.
>
> An example for correct software would be Rowley Crossworks.
> It just works.


--
Eduardo Peters
+55 47 8405 0331
Canoinhas - SC - Brazil
peters (at) canoinhas.com

I think the photo at Olimex is wrong.  The same device at Sparkfun is
parallel http://www.sparkfun.com/commerce/product_info.php?products_id=275

I have one and it kind of works according to the James Lynch Tutorial
under WinXP.  Eventually I want to try it with OpenOCD under Linux but
I haven't had time.

I really wish I could afford a proper JTAG programmer for the LPC2xxx
devices.  I'm ok with ISP and, in my one big project, I didn't have
enough pins to deal with JTAG anyway.  Still, I would like to see how
Insight works when it's done properly.

Richard

--- In lpc2000@yahoogroups.com, "P e t e r s" <dudupeters@...> wrote:
>
> But in image, seem that is a serial port, e I never saw a "wiggler"
serial!

> This is possible?
> 
> On 2/24/06, haare_in_der_dusche <haare_in_der_dusche@...> wrote:
> > > Look this
> > > http://www.olimex.cl/product_info.php?products_id=28
> > >
> > > What you think about this JTAG.
> > > Still same problems, how don't write in flash, I think that is
> > > possible work with him.
> > > I buy this JTAG yesterday, and when I receive him, will be test and
> > > post here the results.
> >
> >
> > This is a "wiggler" clone.
> > Using the correct software, it *is* possible to program the FLASH-ROM
> > with it.
> >
> > An example for correct software would be Rowley Crossworks.
> > It just works.
> 
> 
> --
> Eduardo Peters
> +55 47 8405 0331
> Canoinhas - SC - Brazil
> peters (at) canoinhas.com
>