Lpc2000

1)  Can another driver chip be substituted for the 74AC244?  Since
only four drivers are needed, couldn't a 74xx125 or equivalent be
used?  What about different logic families, such as the HC or LS parts?

2)  What driver(s) need to be installed to let the software talk
directly to the parallel port on Windows XP?

3)  Does anyone have a detailed, step-by-step HOWTO on setting up a
gcc-gbd-wiggler development environment under Windows?

I'm using the LP2106 and LPC2131 boards from New Micros in Dallas TX.

Thanks for any help with this.  I've been successful with getting the
toolchain up and running, using the serial bootloader.  I'd like to
get a JTAG interface working, too.

Dale Wheat

--- In lpc2000@yahoogroups.com, "dalewheat" <dalewheat@y...> wrote:
> 1)  Can another driver chip be substituted for the 74AC244?  Since
> only four drivers are needed, couldn't a 74xx125 or equivalent be
> used?  What about different logic families, such as the HC or LS 
parts?

It's not really my circuit, I just designed the PCB. Mine works fine 
with an HC244, but it really should use the AC244.


> 
> 2)  What driver(s) need to be installed to let the software talk
> directly to the parallel port on Windows XP?

Applications like the Macraigor and Crossworks software that support 
the Wiggler already have the necessary drivers.


> 
> 3)  Does anyone have a detailed, step-by-step HOWTO on setting up a
> gcc-gbd-wiggler development environment under Windows?

Try the gnuarm Yahoo group.

Leon

Hi Dale,

dalewheat wrote:
> 1)  Can another driver chip be substituted for the 74AC244?  Since
> only four drivers are needed, couldn't a 74xx125 or equivalent be
> used?  What about different logic families, such as the HC or LS parts?

The main purpose of the driver is to isolate the 3.3v JTAG pins
from the (nominal) 5v parallel port levels with good wave shape.
Since most software solutions allows different clock speeds, you
have multiple options (AC is faster (I believe) than HC which has
slighly different logic levels than LS).

> 
> 2)  What driver(s) need to be installed to let the software talk
> directly to the parallel port on Windows XP?
> 
> 3)  Does anyone have a detailed, step-by-step HOWTO on setting up a
> gcc-gbd-wiggler development environment under Windows?
> 
 > ...

 From post 8298 (I had to look up in the index to get the post number)
by "g pf", digging deeper into his link you will find:
 
http://www.siwawi.arubi.uni-kl.de/avr_projects/arm_projects/wiggler_intro/index.html

which give you one option for items 2) and 3).

Also, a past post with a link on using the Eclipse IDE to compile and
program the ARM also gave very good info with hints on making it work.

Enjoy,
- Gary Greene

Hi Dale.

You might be interested in my tutorial "ARM Development with Eclipse" 
which gives a detailed setup of the GCC/Wiggler. If you check the 
Links section of this group, there's a link to the tutorial and its 
example code.

Cheers,
Jim Lynch