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From: Raul on 23 Apr 2010 05:10
Hi,

I'm looking for a small scripting engine implementation for my
embedded project running on STM32F103T6 MCU @ 72MHz and FreeRTOS 6.0.4
and ST library 3.2.0.

Right now, I'm using a derivate of basic language with code:
c=0
for d=1 to 10000
set_onboard_led c
if c=0 then c=1 else c=0
next d
end

and get performance roughly 1 millisecond per 1 loop. The project is
level 2 optimized in GCC (-O2).
The script is running as an operating system task. I'm looking for an
alternative scripting solution that can do roughly 20 microseconds per
1 loop.

Thanks in advance!
From: FreeRTOS info on 23 Apr 2010 06:49
On 23/04/2010 10:10, Raul wrote:
> Hi,
>
> I'm looking for a small scripting engine implementation for my
> embedded project running on STM32F103T6 MCU @ 72MHz and FreeRTOS 6.0.4
> and ST library 3.2.0.
>
> Right now, I'm using a derivate of basic language with code:
> c=0
> for d=1 to 10000
> set_onboard_led c
> if c=0 then c=1 else c=0
> next d
> end
>
> and get performance roughly 1 millisecond per 1 loop. The project is
> level 2 optimized in GCC (-O2).
> The script is running as an operating system task. I'm looking for an
> alternative scripting solution that can do roughly 20 microseconds per
> 1 loop.
>
> Thanks in advance!


You might want to take a look at:
http://www.compuphase.com/pawn/pawn.htm

I don't know anything about it so cannot recommend it as such, but I do
know that people use it with FreeRTOS.

--

Regards,
Richard.

+ http://www.FreeRTOS.org
Designed for Microcontrollers. More than 7000 downloads per month.

+ http://www.SafeRTOS.com
Certified by TÜV as meeting the requirements for safety related systems.



From: David Brown on 23 Apr 2010 07:48
On 23/04/2010 11:10, Raul wrote:
> Hi,
>
> I'm looking for a small scripting engine implementation for my
> embedded project running on STM32F103T6 MCU @ 72MHz and FreeRTOS 6.0.4
> and ST library 3.2.0.
>
> Right now, I'm using a derivate of basic language with code:
> c=0
> for d=1 to 10000
> set_onboard_led c
> if c=0 then c=1 else c=0
> next d
> end
>
> and get performance roughly 1 millisecond per 1 loop. The project is
> level 2 optimized in GCC (-O2).
> The script is running as an operating system task. I'm looking for an
> alternative scripting solution that can do roughly 20 microseconds per
> 1 loop.
>
> Thanks in advance!

Have you looked at Lua? <http://www.lua.org/> It's quite a powerful
and flexible embeddedable scripting language. You'll want to configure
it to use integer numbers (by default it uses floating point).

From: Raul on 23 Apr 2010 08:39
On Apr 23, 2:48 pm, David Brown <da...(a)westcontrol.removethisbit.com>
wrote:
> On 23/04/2010 11:10, Raul wrote:
>
>
>
> > Hi,
>
> > I'm looking for a small scripting engine implementation for my
> > embedded project running on STM32F103T6 MCU @ 72MHz and FreeRTOS 6.0.4
> > and ST library 3.2.0.
>
> > Right now, I'm using a derivate of basic language with code:
> > c=0
> > for d=1 to 10000
> >    set_onboard_led c
> >    if c=0 then c=1 else c=0
> > next d
> > end
>
> > and get performance roughly 1 millisecond per 1 loop. The project is
> > level 2 optimized in GCC (-O2).
> > The script is running as an operating system task. I'm looking for an
> > alternative scripting solution that can do roughly 20 microseconds per
> > 1 loop.
>
> > Thanks in advance!
>
> Have you looked at Lua?  <http://www.lua.org/>  It's quite a powerful
> and flexible embeddedable scripting language.  You'll want to configure
> it to use integer numbers (by default it uses floating point).

Yes, LUA is definitely one of the good choices. But right now I have
not seen any good benchamarks on Internet. I'd not consider porting
the language just to see that it is too slow :)
Pawn looks also interesting - has anyone ported it to STM32 or cortex-
m3 platform?
From: David Brown on 23 Apr 2010 10:19
On 23/04/2010 14:39, Raul wrote:
> On Apr 23, 2:48 pm, David Brown<da...(a)westcontrol.removethisbit.com>
> wrote:
>> On 23/04/2010 11:10, Raul wrote:
>>
>>
>>
>>> Hi,
>>
>>> I'm looking for a small scripting engine implementation for my
>>> embedded project running on STM32F103T6 MCU @ 72MHz and FreeRTOS 6.0.4
>>> and ST library 3.2.0.
>>
>>> Right now, I'm using a derivate of basic language with code:
>>> c=0
>>> for d=1 to 10000
>>> set_onboard_led c
>>> if c=0 then c=1 else c=0
>>> next d
>>> end
>>
>>> and get performance roughly 1 millisecond per 1 loop. The project is
>>> level 2 optimized in GCC (-O2).
>>> The script is running as an operating system task. I'm looking for an
>>> alternative scripting solution that can do roughly 20 microseconds per
>>> 1 loop.
>>
>>> Thanks in advance!
>>
>> Have you looked at Lua?<http://www.lua.org/> It's quite a powerful
>> and flexible embeddedable scripting language. You'll want to configure
>> it to use integer numbers (by default it uses floating point).
>
> Yes, LUA is definitely one of the good choices. But right now I have
> not seen any good benchamarks on Internet. I'd not consider porting
> the language just to see that it is too slow :)
> Pawn looks also interesting - has anyone ported it to STM32 or cortex-
> m3 platform?

There's no porting to do - it's a C library, and can be compiled with
just about any compiler. I don't know about its performance (though it
will be slower if you don't configure for integers), but there should be
no problem getting it to build.
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