As far as I know all of the 4k of RAM is available for use,
so you should have about 2.5k for your buffer allocs. Maybe
you can put in an allocation size detector for your simulation
so you can see where it (is assumed to) overflow? Or log all
the alloc/frees and match them up...
MS
Munaretto, Daniel wrote:
Thanks for your answer, in my program i allocate memory to create in each mote
a buffer-chain (i use structures that allocate memory dynamically). But i don't
know exactly how much dynamic memory i can use in Micaz motes.
For example, if after compiling i use 1419 bytes in RAM and 19748 bytes in ROM,
is the rest used for dynamic allocation?
i don't understand this passage about exactly how much memory i can use
dynamically..for me understanding would be really important.
Thanks for your availability,
Cheers
Daniele
-----Original Message-----
From: Michael Schippling [mailto:[EMAIL PROTECTED]
Sent: Fri 7/28/2006 7:12 PM
To: Munaretto, Daniel
Cc: [email protected]
Subject: Re: [Tinyos-help] Help with real node behaviour!Micaz,tinyos 1.x
Well there's 128K of PROM and 4K of RAM in the ATMEGA 128
and I believe it is all available. At the end of the TOS
compile you get a line that says how much your program is
using. If you are not doing any kind of dynamic allocation
this should be the maximum used. Perhaps you have a pointer
or something that is running amuck in a way that you don't
see in simulation.
I think using FLASH is rather slow and the number of MTBF
cycles is not conducive to temporary storage.
MS
Munaretto, Daniel wrote:
> I did other experiments and i found that, with little data size, the
nodes are able to send and receive all packets they generate. So it's definitely a
memory problem. But i think not to use so much memory and i free, when i can, the
used structures. Remember i need a buffer chain in each node cause i store
incoming packets and then i create new coded packets from these buffers.
> Now my question is: with Micaz motes, tinyos 1.x, how much memory in
ROM and RAM can i use?
> and is it possible to use the FLASH memory?if yes how?and what's the
size of it?
> If possible, i'd like to receive very precise informations for
understanding my problem in the best way.
>
> Thanks very much for your availability
> cheers
> Daniele
>
> -----Original Message-----
> From: Michael Schippling [mailto:[EMAIL PROTECTED]
> Sent: Thu 7/27/2006 9:25 PM
> To: Munaretto, Daniel
> Cc: [email protected]
> Subject: Re: [Tinyos-help] Help with real node
behaviour!Micaz,tinyos 1.x
>
>
>
> Sounds like your buffering scheme is overflowing and crashing
the mote.
> One clue is that I seem to see a lot of length 5 buffer pools
in TOS...
> You might want to double check that you are freeing buffers
after use.
> MS
>
> Munaretto, Daniel wrote:
> > Hi all,
> > after a lot of simulation in TOSSIM, i uploaded my programs
on the motes.
> > By reading the leds, i'm able to understand what happens.
> >
> > If i run on motes a normal flooding, it's all ok. All packets are sent and received.
> >
> > But if i run a more complex program, where before broadcasting packets i code packets i stored in the node's internal buffer, i notice i cannot receive over 5 packets (in my experiments i generate 8 packets per node). But if i run only one mote, it's able to generate all packets.
>
> > So if i run 2 nodes, one seems blocked or crashed after
receiving 5 packets (Leds stop to work, fixed on a color or void) and the other one
continue to send packets in a properly way.
>
> > I made with several motes and it's the same, also changing
batteries.
> >
> > Anyone could help me, please?
> > i don't know what's wrong, in TOSSIM was all ok.
> > And i'm using micaz motes, tinyos 1.x, after compiling i see:
used RAM=1657 bytes, used ROM=19600 bytes.
> >
> > Thanks very much, i hope someone could answer to me!
> > cheers
> > Daniele
> >
> >
> > _______________________________________________
> > Tinyos-help mailing list
> > [email protected]
> >
https://mail.millennium.berkeley.edu/cgi-bin/mailman/listinfo/tinyos-help
>
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