Lpc2000

Dear All,

I am a new user of lpc2000 series.  I don't know
how to write "NOP" in the C code.  I have tried
_asm("NOP") and #asm("nop") but failed.

Beeno

At 01:28 AM 4/28/04 +0800, you wrote:
>I am a new user of lpc2000 series.  I don't know
>how to write "NOP" in the C code.  I have tried
>_asm("NOP") and #asm("nop") but failed.
Two questions:
Which compiler?
What do you mean by failed?

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

If your assembler does not have NOP (the ARM architecture does not have it),
use for instance:

  MOV R0, R0

/sten
Nohau Corp

----- Original Message ----- 
From: "Beeno Rabbit" <beenorabbit@...>
To: <lpc2000@yahoogroups.com>
Sent: Tuesday, April 27, 2004 10:28 AM
Subject: [lpc2000] NOP Question


Dear All,

I am a new user of lpc2000 series.  I don't know
how to write "NOP" in the C code.  I have tried
_asm("NOP") and #asm("nop") but failed.

Beeno

You can use the following in your C function. This should work for 
ADS 1.2 C compiler. Please post if it works or not. 

Does gcc support __asm ?

__asm
{
    NOP
}

OR

__asm
{
    MOV r0, r0
}


ADS 1.2 assembler supports the NOP pseudo instruction.

Relevant text from the assembler guide
http://www.arm.com/pdfs/DUI0068B_ADS1_2_Assembler.pdf

NOP ARM pseudo-instruction
NOP generates the preferred ARM no-operation code.

The following instruction might be used, but this is not guaranteed:
MOV r0, r0
Syntax
NOP

Usage
NOP cannot be used conditionally. Not executing a no-operation is the 
same as executing
it, so conditional execution is not required.
ALU status flags are unaltered by NOP.

--- In lpc2000@yahoogroups.com, "Beeno Rabbit" <beenorabbit@u...> 
wrote:
> I am using ADS2.1 compiler (Code Warrior).  I don't know how to 
code "NOP" in the C code.
> Any example for this?
> 
> Beeno
> 
> 
> 
>   ----- Original Message ----- 
>   From: Robert Adsett 
>   To: lpc2000@yahoogroups.com 
>   Sent: Wednesday, April 28, 2004 1:52 AM
>   Subject: Re: [lpc2000] NOP Question
> 
> 
>   At 01:28 AM 4/28/04 +0800, you wrote:
>   >I am a new user of lpc2000 series.  I don't know
>   >how to write "NOP" in the C code.  I have tried
>   >_asm("NOP") and #asm("nop") but failed.
>   Two questions:
>   Which compiler?
>   What do you mean by failed?
> 
>   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
> 
> 
> 
> --------------------------------------------------------------------
----------
>   Yahoo! Groups Links
> 
>     a.. To visit your group on the web, go to:
>     http://groups.yahoo.com/group/lpc2000/
>       
>     b.. To unsubscribe from this group, send an email to:
>     lpc2000-unsubscribe@yahoogroups.com
>       
>     c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of 
Service.

Hi Beeno,

#define NOP __asm                    \
{                                    \
        nop;                         \
}

should work for both ADS & SDT.

Cheers,
-Mike.

--- Beeno Rabbit <beenorabbit@...> wrote:
> I am using ADS2.1 compiler (Code Warrior).  I don't
> know how to code "NOP" in the C code.
> Any example for this?
> 
> Beeno
> 
> 
> 
>   ----- Original Message ----- 
>   From: Robert Adsett 
>   To: lpc2000@yahoogroups.com 
>   Sent: Wednesday, April 28, 2004 1:52 AM
>   Subject: Re: [lpc2000] NOP Question
> 
> 
>   At 01:28 AM 4/28/04 +0800, you wrote:
>   >I am a new user of lpc2000 series.  I don't know
>   >how to write "NOP" in the C code.  I have tried
>   >_asm("NOP") and #asm("nop") but failed.
>   Two questions:
>   Which compiler?
>   What do you mean by failed?
> 
>   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
> 
> 
> 
>
------------------------------------------------------------------------------
>   Yahoo! Groups Links
> 
>     a.. To visit your group on the web, go to:
>     http://groups.yahoo.com/group/lpc2000/
>       
>     b.. To unsubscribe from this group, send an
> email to:
>     lpc2000-unsubscribe@yahoogroups.com
>       
>     c.. Your use of Yahoo! Groups is subject to the
> Yahoo! Terms of Service. 
> 
> 



	
		
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Hi all,

The Arm uCOS-II port includes Thumb mode tasks now!!!

Features:
1. The OS can be built for either ARM or Thumb mode
tasks.
2. The following 3 tool-chains can be used to build:
ADS, SDT or GCC (arm-elf-gcc)
3. The uCOS kernel takes just over 4K bytes of ROM
(text & const sections) in Thumb mode when built using
SDT. ADS might yield a better code.
4. Includes HAL for LPC241x.

Download page:
http://geocities.com/michaelanburaj/uCOS/index.html
http://geocities.com/michaelanburaj/

Cheers,
-Mike.



	
		
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