LPC2xxx eCOS port

Started by Hugh O'Keeffe January 5, 2004
Hi,
Anyone on the group done any work on this ? I know that eCOS is
available for ARM7, however, I'm guessing that it will need specific
device drivers for LPC2xxx peripherals such as UARTS, VIC and Flash ?
Any feedback appreciated Hugh @ http://www.ashling.com/support/lpc2100/



An Engineer's Guide to the LPC2100 Series

Hugh,

> Hi,
> Anyone on the group done any work on this ? I know that eCOS
> is available for ARM7, however, I'm guessing that it will
> need specific device drivers for LPC2xxx peripherals such as
> UARTS, VIC and Flash ? Any feedback appreciated

With only 128K of FLASH on an LPC, you're not going to get much
meaningful eCOS code onto a 2106. Why not port uC/OS?

--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
CrossWorks for MSP430 and ARM processors




Hello Hugh,

i found the following message some days ago:

http://www.cygwin.com/ml/ecos-devel/2003-10/msg00015.html

I already contacted Ashwin, but haven't got any answer from him (perhaps on
chrismas holidays ?)

Greetings,

Martin

----- Original Message -----
From: "Hugh O'Keeffe" <>
To: <>
Sent: Monday, January 05, 2004 11:21 AM
Subject: [lpc2100] LPC2xxx eCOS port > Hi,
> Anyone on the group done any work on this ? I know that eCOS is
> available for ARM7, however, I'm guessing that it will need specific
> device drivers for LPC2xxx peripherals such as UARTS, VIC and Flash ?
> Any feedback appreciated > Hugh @ http://www.ashling.com/support/lpc2100/ >
>




Message
Hi Paul,
 
My understanding is that eCOS is highly configurable (via GUI) , footprints < 32K are possible and it is open-source with no up-front/royalty costs.  AFAIK, uC/OS is already ported to LPC2xxx, however, this OS is not open-source and does require an upfront payment (see http://www.ucos-ii.com/).
 
 
-----Original Message-----
From: Paul Curtis [mailto:p...@rowley.co.uk]
Sent: 05 January 2004 10:27
To: l...@yahoogroups.com
Subject: RE: [lpc2100] LPC2xxx eCOS port

Hugh,

> Hi,
> Anyone on the group done any work on this ? I know that eCOS
> is available for ARM7, however, I'm guessing that it will
> need specific device drivers for LPC2xxx peripherals such as
> UARTS, VIC and Flash ? Any feedback appreciated

With only 128K of FLASH on an LPC, you're not going to get much
meaningful eCOS code onto a 2106.  Why not port uC/OS?

--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
CrossWorks for MSP430 and ARM processors


Yahoo! Groups Links
To


Hugh,

The port of uC/OS to hardware costs nothing as long as the port is
contributed back to Jean's site so he can host it. The OS is
inexpensive, delivered with the uC/OS book on CD. I'm not sure of the
deployment costs, though, but I'm sure it's competetive with other OS
offerings, otherwise Micrium would go out of business.

I'm not swayed one way or the other on RTOS support in embedded systems,
I've never really had a good re asonto use one. Even for big embedded
systems with 16 68K boards on VMEbus with 56 simulataneous serial inputs
at 38K4 streaming to a terrestrial datacast system, I wasn't persuaded
to use an RTOS, just interrupts.

Oh, and all my code fits well inside 4K for any conceivable task, of
course! ;-)

--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
<http://www.rowley.co.uk/>
CrossWorks for MSP430 and ARM processors

-----Original Message-----
From: Hugh O'Keeffe [mailto:]
Sent: 05 January 2004 10:39
To:
Subject: RE: [lpc2100] LPC2xxx eCOS port Hi Paul,

My understanding is that eCOS is highly configurable (via GUI) ,
footprints < 32K are possible and it is open-source with no
up-front/royalty costs. AFAIK, uC/OS is already ported to LPC2xxx,
however, this OS is not open-source and does require an upfront payment
(see http://www.ucos-ii.com/).

Hugh @ http://www.ashling.com/support/lpc2100/

-----Original Message-----
From: Paul Curtis [mailto:]
Sent: 05 January 2004 10:27
To:
Subject: RE: [lpc2100] LPC2xxx eCOS port Hugh,

> Hi,
> Anyone on the group done any work on this ? I know
that eCOS
> is available for ARM7, however, I'm guessing that it
will
> need specific device drivers for LPC2xxx peripherals
such as
> UARTS, VIC and Flash ? Any feedback appreciated

With only 128K of FLASH on an LPC, you're not going to
get much
meaningful eCOS code onto a 2106. Why not port uC/OS?

--
Paul Curtis, Rowley Associates Ltd
http://www.rowley.co.uk
CrossWorks for MSP430 and ARM processors
_____

> .

_____

> .



Message
Hi Paul,
 
I've seen the book and its an excellent guide to OS use in embedded systems, however, for commercial use Micrium do require some upfront license agreement + cash (I think its 100s of $). 
 
eCOS is totally free for use in commercial applications, however, you are on your own from a support point-of-view (unless you pay companies for support (e.g ecoscentric.com)).
 
My interest is sparked by the requirement to port an existing eCOS application to LPC2xxxx, hence, using another OS is not an option.
 
 
Hugh @ http://www.ashling.com/support/lpc2100/
 
 
 -----Original Message-----
From: Paul Curtis [mailto:p...@rowley.co.uk]
Sent: 05 January 2004 14:04
To: l...@yahoogroups.com
Subject: RE: [lpc2100] LPC2xxx eCOS port

Hugh,

The port of uC/OS to hardware costs nothing as long as the port is
contributed back to Jean's site so he can host it.  The OS is
inexpensive, delivered with the uC/OS book on CD.  I'm not sure of the
deployment costs, though, but I'm sure it's competetive with other OS
offerings, otherwise Micrium would go out of business.

I'm not swayed one way or the other on RTOS support in embedded systems,
I've never really had a good re asonto use one.  Even for big embedded
systems with 16 68K boards on VMEbus with 56 simulataneous serial inputs
at 38K4 streaming to a terrestrial datacast system, I wasn't persuaded
to use an RTOS, just interrupts.

Oh, and all my code fits well inside 4K for any conceivable task, of
course!  ;-)

--
Paul Curtis, Rowley Associates Ltd http://www.rowley.co.uk
<http://www.rowley.co.uk/>
CrossWorks for MSP430 and ARM processors

      -----Original Message-----
      From: Hugh O'Keeffe [mailto:h...@ashling.com]
      Sent: 05 January 2004 10:39
      To: l...@yahoogroups.com
      Subject: RE: [lpc2100] LPC2xxx eCOS port
     
     
      Hi Paul,
     
      My understanding is that eCOS is highly configurable (via GUI) ,
footprints < 32K are possible and it is open-source with no
up-front/royalty costs.  AFAIK, uC/OS is already ported to LPC2xxx,
however, this OS is not open-source and does require an upfront payment
(see http://www.ucos-ii.com/).
     
     
     

      Hugh @ http://www.ashling.com/support/lpc2100/

            -----Original Message-----
            From: Paul Curtis [mailto:p...@rowley.co.uk]
            Sent: 05 January 2004 10:27
            To: l...@yahoogroups.com
            Subject: RE: [lpc2100] LPC2xxx eCOS port
           
           
            Hugh,
           
            > Hi,
            > Anyone on the group done any work on this ? I know
that eCOS
            > is available for ARM7, however, I'm guessing that it
will
            > need specific device drivers for LPC2xxx peripherals
such as
            > UARTS, VIC and Flash ? Any feedback appreciated
           
            With only 128K of FLASH on an LPC, you're not going to
get much
            meaningful eCOS code onto a 2106.  Why not port uC/OS?
           
            --
            Paul Curtis, Rowley Associates Ltd
http://www.rowley.co.uk
            CrossWorks for MSP430 and ARM processors
           
           
           
  _____ 

            > .
     
  _____ 

      > .

Yahoo! Groups Links
To




On Mon, Jan 05, 2004 at 02:31:29PM -0000, Hugh O'Keeffe wrote:
>
> eCOS is totally free for use in commercial applications, however, you
> are on your own from a support point-of-view (unless you pay companies
> for support (e.g ecoscentric.com)).
>
> My interest is sparked by the requirement to port an existing eCOS
> application to LPC2xxxx, hence, using another OS is not an option.

>
> My understanding is that eCOS is highly configurable (via
> GUI) ,
> footprints < 32K are possible and it is open-source with no
> up-front/royalty costs. AFAIK, uC/OS is already ported to LPC2xxx,
> however, this OS is not open-source and does require an upfront
> payment
> (see [4]http://www.ucos-ii.com/).

Does eCos really work on the LPC with just 64kBytes RAM? From
the ecos-mailinglist archive people recommend at least 200kBytes RAM.
Well it is highly configurable, but with half of the memory used by the OS
there is no much room for the application.

M.