[riot-devel] Fix MSP430 ports of RIOT! [Was: *Stable* platforms for RIOT-OS]

ROUSSEL Kévin Kevin.Roussel at inria.fr
Mon Sep 1 11:48:35 CEST 2014

Hello David,

The G2553 and G2452 devices are not technically much different from the 
F1611 and F2617 we currently support.

The main problem with the chips you mention is the memory space; taken 
from TI manuals:
* G2553 : 16 Kb Flash ROM, 512 bytes RAM
* G2452 :  8 Kb Flash ROM, 256 bytes RAM

Having less than 1 Kb of RAM is clearly a show-stopper here: since RIOT 
is a true multitasking OS, you need to have a certain amount of RAM 
(circa 200 bytes) per task (thread), plus half a kilobyte for the 
interrupt-management system.

As it is said on RIOT presentation page (http://www.riot-os.org/), you 
need a device with at least 2 Kb of RAM if you really want to use RIOT 
OS. As a matter of fact, this is true with every OS out there (even 
TinyOS needs around 1 Kb RAM to be used correctly).

As comparison, the MSP430 device we currently support have these 
* F1611: 48 Kb Flash ROM, 10 Kb RAM
* F1612: 55 Kb Flash ROM, 5 Kb RAM
* F2617: 92 Kb Flash ROM, 8 Kb RAM
* F6137: 32 Kb Flash ROM, 4 Kb RAM
The use of a complete network stack (to support IoT, which is the main 
field of application of RIOT) makes the use of these high-end devices 
If you forget the network stack, and only use the core, having at least 
2 Kb is still an absolute necessity (4 Kb RAM being strongly recommended).

I'm afraid the introductory/low-end devices you mention are definitely 
not powerful enough for RIOT (nor another OS)...

Maybe could you get some (used) Sky/TelosB devices -- these are legacy, 
cheap devices -- if you want to try RIOT?

Sorry, and best regards,

Le 29/08/2014 16:40, David Lyon a écrit :
> On 2014-08-29 23:31, Emmanuel Baccelli wrote:
>> Awesome! Great work.
>> Best,
> Cool.
> I have a Ti Launchpad wit MSP w G2553 and G2452.
> What's the setup that I need?
> ok, I don't have radio, but maybe I could be satisfied using the serial
> port and bluetooth.
> Is there any documentation pointing to the process. Sorry, I'm not a
> MSP430 expert. But the hardware is here.
> Regards
> David
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      Kévin Roussel
      Doctorant, projet LAR
      Équipe MADYNES, INRIA Nancy Grand-Est / LORIA
      Tél. : +33 3 54 95 86 27
      Kevin.Roussel at inria.fr

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