Lpc2000

Hello,
Is anybody using IAR Embedded Workbench for ARM microcontrollers.
I'm curious about your opinions concerning this software.

Hi,

  Yes I use the EWARM with our current product line. I have my
problems with the compiler and also getting "timely" updates to the
software. 

  I also think some of the "warnings" are a little strange at time or
my be a little "picky". Other then that it's pretty good and in terms
of code generation I find it very good. 

   I currently use ARM over Thumb and a project that I ported from the
Philips XAG49 processor turned out to be pretty easy especially with
the JTAG and Kickstart boards. It reduced the code size down by 10%
from the XA version and increased the data size by 15% but I have not
optimized the data area yet. Software excution speed without
optimization to 2 times faster then the XA and with maximum
optimization when to about 3.5 times faster.

regards,
Charles

--- In lpc2000@yahoogroups.com, "arm_beta_tester" <h11@o...> wrote:

>
> Hello,
> Is anybody using IAR Embedded Workbench for ARM microcontrollers.
> I'm curious about your opinions concerning this software.
>

I use IAR EWAVR and IAR EWARM.

In my experience IAR offers a clean interface, clean debugger, and excellent
support (West Coast office).  The C-Spy plug-ins are a nice feature.  I've
found the IAR compiler to be more strict (perhaps more compliant?) than
Keil.  I've heard the MISRA feature touted as a built-in Lint.


Example - Keil code IAR does not like:

#define P_EP(n) ((USB_EP_EVENT & (1 << (n))) ? USB_EndPoint##n : NULL)

const void (* USB_P_EP[16]) (DWORD event) = {
  P_EP(0),
  P_EP(1),
  P_EP(2)
};


Reworked for IAR:

typedef void (*PUSB_P_EP)( DWORD event );

const PUSB_P_EP USB_P_EP[] = {

  USB_EndPoint0,
  USB_EndPoint1,
  USB_EndPoint2
};

I heard rumor at one point Keil did not completely implement floating point
numbers to spec, which lead to rounding errors; but offered faster floating
point performance.  Keep this in mind when comparing floating point
performance between the two.


Joel

I have used both Keil and IAR.  I prefer IAR for a lot of reasons:

 

*	Debugger display of special purpose registers far superior
*	Watch display superior
*	Seems more compliant

 

It does have its bugs/design "flaws".  

*	If a map file is open and you recompile, the map file is not
updated
*	Similarly, if a source file is open in the IDE and you modify it
outside, it is not updated in the IDE display.  Amazingly, the external
update is not used for the compile, but the older open source is...  I
really would like this fixed so I could use external editors better.
*	The in-line assembler is not as robust as Keil - it is hard to
access relocatable addresses.

 

IAR has been slow to fix these nuisance bugs, but they have been very
good about addressing "real' bugs.  And there have been very few of
those.  


Tech support has been good.  Generally, the response in within hours.
But during "show time", when tech support is supporting shows, emails
take a bit long to get response.  They have been good at helping with
"my problems" where the product worked, but I didn't know how to get
something done

 

Still, with these limitations, I seem to get a lot more done in IAR
environment.


Dan

.  

 

  _____  

From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf
Of arm_beta_tester
Sent: Tuesday, November 29, 2005 3:28 PM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] IAR Embedded Workbench for ARM - EWARM

 

Hello,
Is anybody using IAR Embedded Workbench for ARM microcontrollers.
I'm curious about your opinions concerning this software.







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[Non-text portions of this message have been removed]

Dan

> It does have its bugs/design "flaws".
>
> *	If a map file is open and you recompile, the map file is not
> updated
> *	Similarly, if a source file is open in the IDE and you modify it
> outside, it is not updated in the IDE display.  Amazingly, the external
> update is not used for the compile, but the older open source is...  I
> really would like this fixed so I could use external editors better.

Something which bugs me too and did cost me some hair.
(I wonder why they do not fix it ?!)

Another point is that the IDE does not support environmet variables in the
pre-processor tabs which means if you change e.g. from one RTOS version
to another you have to change also the project.
Others do better here.

But other than this, I like the build tool, esp. it is possible to have
per file options that differ from global options.
Only pity here, you can't choose ARM or Thumb mode on a per file basis.
AFAIK you have to use pragmas.

The (German) support is quiet responsiv though bug fixes sometimes take too
long. There are others doing better (but also worser).

One big negative point about IAR (and many others):
It does not work under linux :(
So I stick for my daily work with emacs,make,gcc and a debugger from a
Bavarian manufacturer ;-)

-- 
42Bastian Schick

At 04:29 PM 11/29/05 -0800, Joel Winarske wrote:
>I've heard the MISRA feature touted as a built-in Lint.

If they are touting MISRA checking as lint they haven't seen a good 
lint.  MISRA is a subset of what a good lint can find.

>Example - Keil code IAR does not like:
>
>#define P_EP(n) ((USB_EP_EVENT & (1 << (n))) ? USB_EndPoint##n : NULL)
>
>const void (* USB_P_EP[16]) (DWORD event) = {
>   P_EP(0),
>   P_EP(1),
>   P_EP(2)
>};


Good heavens, that may be legal C it's some of the ugliest I've seen in a 
while.  I'd want an awfully good reason before using such a 
construct.  PC-Lint BTW throws up all over it :)

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,   be 
they legal, genetic, or physical.  If you don't believe me, try to chew a 
radio signal. "  -- Kelvin Throop, III
http://www.aeolusdevelopment.com/

> If they are touting MISRA checking as lint they haven't seen a good
> lint.  MISRA is a subset of what a good lint can find.

PC-Lint for single workstation only runs $239.  http://www.gimpel.com/

Do you suggest a better lint?

> 
> >Example - Keil code IAR does not like:
> >
> >#define P_EP(n) ((USB_EP_EVENT & (1 << (n))) ? USB_EndPoint##n : NULL)
> >
> >const void (* USB_P_EP[16]) (DWORD event) = {
> >   P_EP(0),
> >   P_EP(1),
> >   P_EP(2)
> >};
> 
> 
> Good heavens, that may be legal C it's some of the ugliest I've seen in a
> while.  I'd want an awfully good reason before using such a
> construct.  PC-Lint BTW throws up all over it :)
> 

Yes.  It was taken from the Keil USB examples.  Ugly and useful for proving
a point ;)

Joel

--- In lpc2000@yahoogroups.com, "Dan Beadle" <dan.beadle@i...> wrote:
>
> *	Similarly, if a source file is open in the IDE and you 
modify it
> outside, it is not updated in the IDE display.  Amazingly, the 
external
> update is not used for the compile, but the older open source 
is...  I
> really would like this fixed so I could use external editors 
better.

Odd...this works fine with my installation of EWARM. I use Multi-
Edit for complicated search and replace (with the files open in both 
EWARM and Multi-Edit), and files are ALWAYS updated in the EWARM IDE 
when I save them in Multi-Edit.

Actually, that's my biggest complaint with EWARM -- the rather 
primitive search and replace functions. I would like a proper 
regular expression capability, and also the ability to 
Search/Replace in all files.

Cheers,

Damon

At 12:31 AM 11/30/05 -0800, Joel Winarske wrote:
> > If they are touting MISRA checking as lint they haven't seen a good
> > lint.  MISRA is a subset of what a good lint can find.
>
>PC-Lint for single workstation only runs $239.  http://www.gimpel.com/
>
>Do you suggest a better lint?

That's the one I use.  I know of several other static analysis checkers 
some more expensive and some cheaper but I haven't compared them.  PC-Lint 
has more than paid for itself.  Very good value for the money.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,   be 
they legal, genetic, or physical.  If you don't believe me, try to chew a 
radio signal. "  -- Kelvin Throop, III
http://www.aeolusdevelopment.com/

> >PC-Lint for single workstation only runs $239.  http://www.gimpel.com/
> >
> >Do you suggest a better lint?
> 
> That's the one I use.  I know of several other static analysis checkers
> some more expensive and some cheaper but I haven't compared them.  PC-Lint
> has more than paid for itself.  Very good value for the money.
> 

I need to set it up for IAR and ARM, I've used it for some time with my Keil
8051 setup.

Would anyone mind posting their PC-Lint config file for using with IAR and
ARM?

Joel

Robert Adsett wrote:
> At 12:31 AM 11/30/05 -0800, Joel Winarske wrote:
> 
>>>If they are touting MISRA checking as lint they haven't seen a good
>>>lint.  MISRA is a subset of what a good lint can find.
>>
>>PC-Lint for single workstation only runs $239.  http://www.gimpel.com/
>>
>>Do you suggest a better lint?
> 
> 
> That's the one I use.  I know of several other static analysis checkers 
> some more expensive and some cheaper but I haven't compared them.  PC-Lint 
> has more than paid for itself.  Very good value for the money.
> 

Try open-source linux-variant splint!

-- 
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