Re: [riot-devel] questions about riot os

[Kaspar Schleiser]

Hi,

On 03/22/2017 12:13 AM, Arjun Hary wrote:
> Is there a plan or a timeline for it? 

Nordic seems to have released its BLE stack for Mynewt under a
compatible license. AFAIK someone is already looking into porting that
to RIOT, but I don't know what's the state there.

Help is very appreciated!

Kaspar
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Re: [riot-devel] questions about riot os

[Arjun Hary]

Is there a plan or a timeline for it?

On Tue, Mar 21, 2017 at 4:07 PM, Kaspar Schleiser 
wrote:

> Hi,
>
> On 03/21/2017 11:38 PM, Arjun Hary wrote:
> > Thanks a lot. I have one more follow up question. Does RIOT have a full
> > Bluetooth stack?
>
> Not yet.
>
> Kaspar
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Re: [riot-devel] questions about riot os

[Arjun Hary]

Thanks a lot. I have one more follow up question. Does RIOT have a full
Bluetooth stack?

On Mon, Mar 20, 2017 at 10:02 AM, Kaspar Schleiser 
wrote:

> Hi Arjun,
>
> On 03/20/2017 05:03 PM, Arjun Hary wrote:
> > 1) After adding the softdevice the code size jumped to 46K bytes which
> > includes compilation of 6lowpan, ipv6. Is there a way to compile the
> > nordic ble linbrary without adding these modules. I tried the
> > DISABLE_MODULE macro and though the makefile complained , the code size
> > still remained the same. It looks like 6lowpan and ipv6 are required
> > modules. How do I change this.
>
> You'll need to remove the corresponding nordic softdevice dependencies
> from Makefile.dep. Currently, if you add modules to DISABLE_MODULE, they
> get removed *after* dependency resolution. In this case, meta-modules
> that are just used for dependency tracking are removed after their
> dependencies are added in.
>
> > 2)  Also as a general question, I see that RIOT claims the FLASH size
> > usage is around 5K. What features does the 5K include. Does it incude
> > pthreads, task switching, synchronization , messaging etc.
>
> That very much depends. Please take a look at tests/minimal, which
> currently compiles to ~2.7k flash for ARM platforms.
>
> 5k flash is enough for RIOT's threading, synchronization and messaging.
> The pthreads wrapper will not fit, though. Also, newlib's POSIX stdio is
> quite large, e.g., a simple printf will pull in ~4k of code on ARM
> platforms.
>
> Kaspar
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Arjun Hary

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 : zGlue Inc., Mountain View, CA

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Re: [riot-devel] questions about riot os

[Kaspar Schleiser]

Hi Arjun,

On 03/20/2017 05:03 PM, Arjun Hary wrote:
> 1) After adding the softdevice the code size jumped to 46K bytes which
> includes compilation of 6lowpan, ipv6. Is there a way to compile the
> nordic ble linbrary without adding these modules. I tried the
> DISABLE_MODULE macro and though the makefile complained , the code size
> still remained the same. It looks like 6lowpan and ipv6 are required
> modules. How do I change this.

You'll need to remove the corresponding nordic softdevice dependencies
from Makefile.dep. Currently, if you add modules to DISABLE_MODULE, they
get removed *after* dependency resolution. In this case, meta-modules
that are just used for dependency tracking are removed after their
dependencies are added in.

> 2)  Also as a general question, I see that RIOT claims the FLASH size
> usage is around 5K. What features does the 5K include. Does it incude
> pthreads, task switching, synchronization , messaging etc. 

That very much depends. Please take a look at tests/minimal, which
currently compiles to ~2.7k flash for ARM platforms.

5k flash is enough for RIOT's threading, synchronization and messaging.
The pthreads wrapper will not fit, though. Also, newlib's POSIX stdio is
quite large, e.g., a simple printf will pull in ~4k of code on ARM
platforms.

Kaspar
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