[PD] LibPd on microcontroller

[Lumis Xulepth]

Hi Joe, hi list

On 2016-05-15 15:06, Joe White wrote:
> Hi Chuckk,
> 
> I'm one of the developers of heavy. Apologies that you felt some
> information was lacking, would be very interested in hearing more
> about your experience and what wasn't answered.

I don't know what Chuckk's comments precisely are, I just found myself 
several times looking for the documentation. Maybe the hamburger on the 
top right isn't obvious for everyone?
Again, I still haven't used it on a specific platform but I think that 
once logged in and having compiled a few patches, navigation is easier. 
I like to be able to switch implementations (C/Unity/Vst etc...) 
documentation easily! :)

> 
> The code that heavy generates should compile on any platform that has
> a C99 compiler, and if it didn't we'd be very interested in looking
> into why. There are no OS specific dependencies and you can even swap
> out your own malloc, math, etc.. implementations.

To your knowledge, has there been usecases or tests of Heavy on MIPS 
platform? Recently I've been thinking about using OpenWRT boards (most 
are MIPS32), generally CPU is 300-600MHz with minimal linux running on 
it for realtime audio.

Thanks for your answers.

Lumis/Fergus

> 
> The code is optimised for SSE, AVX and NEON instruction sets and we
> also provide a single sample option for platforms where they are not
> available (i.e. javascript)
> 
> Here's an example of integration with portaudio
> https://github.com/enzienaudio/examples/tree/master/portaudio [3]
> 
> Thanks,
> Joe
> 
> On 13 May 2016 at 23:22, Chuckk Hubbard <badmuthahubbard at gmail.com>
> wrote:
> 
>> Apropos of the heavy compiler, I was reading up on it and simply
>> moved on because of what seems to me a lack of information. There
>> was an allusion to it working for a wide variety of platforms and so
>> on, but no actual lists of this supposedly wide variety.
>> Does someone have an idea if it could compile Pd patches to work
>> without an OS for some architecture? Otherwise, why would you bother
>> with it? (that's not a rhetorical question)
>> Thanks.
>> -Chuckk
>> 
>> On Mon, May 9, 2016 at 6:39 PM, cyrille henry <ch at chnry.net> wrote:
>> hello,
>> 
>> I recently send a mail in this list describing my experience of
>> audio synthesis on microcontroler, but i did not use libpd.
>> 
>> i did not recommend libpd for microcontrolers.
>> 
>> in fact, I did not recommend audio processing on hardware that did
>> not have support for float arithmetic.
>> (only me or crazy nerd do that).
>> 
>> a micro controller to use is for example the cortex M4. You can
>> find them on the teensy hardware.
>> teensy also provide a audio synthesis library, and is supported by
>> arduino IDE.
>> 
>> You can also have a look at the heavy compiler if you want to
>> embedded a pd patch.
>> 
>> Cyrille
>> 
>> Le 09/05/2016 17:01, Christof Ressi a écrit :
>> Hi,
>> 
>> has anyone experience in using LibPd on a microcontroller?
>> I wanna try to run some rather basic DSP code on this guy here:
>> 
> https://www.olimex.com/Products/IoT/MOD-WIFI-ESP8266-DEV/open-source-hardware
>> [1]
>> There are some existing Arduino/C++ frameworks and I thought I could
>> either write my own small DSP library in C++ or use LibPd.
>> 
>> I understood that LibPd is completely independed of audio drivers
>> and external libraries and since it's plain C code it should work on
>> everything that can run code. However, I have only encountered LibPd
>> in the context of other applications (processing, openFrameworks)
>> and mobile devices so far. Do you think it could work on an ESP8266?
>> I'm also a bit concerned about efficiency, as computation power is
>> rather limited:
>> 
>> "ESP8266EX is embedded with Tensilica L106 32-bit micro controller
>> (MCU), which features extra low
>> power consumption and 16-bit RSIC. The CPU clock speed is
>> 80MHz. It can also reach a maximum
>> value of 160MHz. Real Time Operation System (RTOS) is
>> enabled. Currently, only 20% of MIPS has
>> been occupied by the WiFi stack, the rest can all be used
>> for user application programming and
>> development."
>> 
>> Christof
>> 
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> 
> --
> 
> http://www.badmuthahubbard.com [4]
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> 
> Links:
> ------
> [1]
> https://www.olimex.com/Products/IoT/MOD-WIFI-ESP8266-DEV/open-source-hardware
> [2] https://lists.puredata.info/listinfo/pd-list
> [3] https://github.com/enzienaudio/examples/tree/master/portaudio
> [4] http://www.badmuthahubbard.com
> 
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