LPC21xx newbie questions

Hi

I decided to choose LPC21xx ARM devices  as my microcontroller for small
applications.

I still havent found out what the cheapest and easiest way is to develop and
debug.

Are there any free or low cost solutions that allow jtag graphical debugging
(win or linux ) ?
Is there a low cost alternative to keil-ARM tools ? (The Keil Ulink Jtag and
their LPC21xx based boards look a good starting point ,but a bit expensive )

Are there any RTOSses for these tiny devices ?

I need some hints so i can go for it.


Johan

"Sagaert Johan" ...
> I decided to choose LPC21xx ARM devices  as my microcontroller for small
> applications.
    .....
> I need some hints so i can go for it.


Go for it then, and subscribe to the mail-list at
    http://groups.yahoo.com/group/lpc2100/

A very active group where all these questions are answered in detail (also
in the archives, read them first, strarting at the end).

Regards,
Arie de Muijnck

In article <43b509da$0$19449$ba620e4c@news.skynet.be>, Sagaert Johan
<sagaert.j@AT.belgacom.net> writes
>Hi
>
>I decided to choose LPC21xx ARM devices  as my microcontroller for small
>applications.
>
>I still havent found out what the cheapest and easiest way is to develop and
>debug.
>
>Are there any free or low cost solutions that allow jtag graphical debugging
>(win or linux ) ?
>Is there a low cost alternative to keil-ARM tools ? (The Keil Ulink Jtag and
>their LPC21xx based boards look a good starting point ,but a bit expensive )

None of these kit is expensive. I assume this is for home or hobby use? 

There are the IAR boards with JTAG and eval compiler... similar to the
Keil but the compiler has a 32K limit. 

However both the Keil and the IAR compilers are vastly more efficient
than the GNu unless you have hours to spend optimising your own version
to get it closer.

>Are there any RTOSses for these tiny devices ?

Yes, but why do you need one? The vast majority of embedded systems
don't use an RTOS. 

Regards
  Chris
-- 
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\
\/\/\/\/\ Chris Hills  Staffs  England     /\/\/\/\/
/\/\/ chris@phaedsys.org      www.phaedsys.org \/\/\
\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/

Chris Hills wrote:
> However both the Keil and the IAR compilers are vastly more efficient
> than the GNu unless you have hours to spend optimising your own version
> to get it closer.

What optimizations do you mean?

On Fri, 30 Dec 2005 11:20:08 +0100, "Sagaert Johan" <sagaert.j  AT
belgacom.net> wrote:

>Hi
>
>I decided to choose LPC21xx ARM devices  as my microcontroller for small
>applications.
>
>I still havent found out what the cheapest and easiest way is to develop and
>debug.
>
>Are there any free or low cost solutions that allow jtag graphical debugging
>(win or linux ) ?

Depending what you mean by low-cost, the rowley offering looks to be
good value for money. available for both windows and linux.
http://www.rowley.co.uk

With a wiggler clone (easy to build) together with OCdemon and insight
you can debug programs in RAM. Not to sure how good this combination
is for debugging code directly in flash.

>Is there a low cost alternative to keil-ARM tools ? (The Keil Ulink Jtag and
>their LPC21xx based boards look a good starting point ,but a bit expensive )
>
>Are there any RTOSses for these tiny devices ?

There are quite a few RTOSes available, from free to fairly expensive.
If you google for ARM RTOS you should get quite a number of hits.

>I need some hints so i can go for it.
>
As someone else suggested, join the lpc2000 group on yahoo.

Regards
  Anton Erasmus

Andreas Schwarz <usenet@andreas-s.net> writes:

> Chris Hills wrote:
>> However both the Keil and the IAR compilers are vastly more efficient
>> than the GNu unless you have hours to spend optimising your own version
>> to get it closer.
>
> What optimizations do you mean?

-O2, according to <http://www.compuphase.com/dhrystone.htm> !


-- 

John Devereux

"Sagaert Johan" <sagaert.j AT belgacom.net> wrote in message
news:43b509da$0$19449$ba620e4c@news.skynet.be...
> Hi
>
> I decided to choose LPC21xx ARM devices  as my microcontroller for small
> applications.
>
> I still havent found out what the cheapest and easiest way is to develop
and
> debug.
>
> Are there any free or low cost solutions that allow jtag graphical
debugging
> (win or linux ) ?
> Is there a low cost alternative to keil-ARM tools ? (The Keil Ulink Jtag
and
> their LPC21xx based boards look a good starting point ,but a bit
expensive )
>
> Are there any RTOSses for these tiny devices ?
>
> I need some hints so i can go for it.
>

Try the following links:

http://www.FreeRTOS.org (bias declared)
http://www.gnuarm.org
http://www.olimex.com
and finally ...
http://www.olimex.com/dev/pdf/ARM%20Cross%20Development%20with%20Eclipse%20version%203.pdf

Regards,
Richard.

http://www.FreeRTOS.org