gb | 1 Sep 10:57 2015
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TLS_ECDHE_ECDSA / TinyDTLS on TI HW reset

Hi All,

I tried to run TinyDTLS (client on cc2650) with asymetric ECC cipher suite (PSK obviously running fine but definitely not suitable for real-world TLS handshake..)

At the time very expensive computation for EDCSA signature verifying is executing, software reboot (I guess, watchdog)

As I can not use IAR to debug onboard, I am not sure.

Thing is, Olag Bergam from TinyDTLS confirm to me ECC is very expensive so RAM issue or watchdog reset may occur.

So question is : does anyone ever tried this cipher suite on any Contiki compatible HW ?.

=> ATMEL now propose ECDH/ECDSA HW crypto engine, which will be a must have for sure ! (thingsquare is running ATMEL MCU..)

I am a bit surprise that Texas does even not propose anything about asynmetric crypto engine in it's last CC13xx or any other... ?

thanks for sharing experience.

Regards

Gilles



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Marco Casaroli | 1 Sep 03:01 2015
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New mote and contiki branding

Hello all,

I am launching a new mote based on CC2650 and I want to know how can I proceed to mention on my webpage that contiki is supported and also maybe have my mote listed in the hardware section of the contiki website.

Is it possible?

What do you think?

More devices, better for contiki?


Marco Casaroli
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Jan Szymanski | 31 Aug 04:22 2015
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sniffer platforms

Hi,

Is cc2650 sensortag supported as a sniffer for foren6?
If not what platforms are supported?
If yes, how to build it?

Jan

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R.Vinob chander | 28 Aug 14:31 2015
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make login error

Hi All,
i get this error when i login the hello-world on sky:
user <at> instant-contiki:~/contiki/examples/hello-world$ make TARGET=sky login
../../tools/sky/serialdump-linux -b115200 /dev/ttyUSB0
../../tools/sky/serialdump-linux: 1: ../../tools/sky/serialdump-linux: Syntax error: Unterminated quoted string
make: *** [login] Error 2


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Alper Kamil Demir | 28 Aug 10:40 2015
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RPL Border Router Example problem

I am running \contiki3\examples\ipv6\rpl-border-router example with instructions given at http://anrg.usc.edu/contiki/index.php/RPL_Border_Router
Everything is fine. However, I am not able to ping6 any motes other than rpl-border-router mote.
When I check the neighbors and routes on the Firefox with [aaaa::212:7401:1:101] on the URL, I am able to see Neighbors, but no Routes are shown. I assume it is because no RPL routing table is constructed. I assume that's why I am not able to ping6 any motes other than rpl-border-router mote.
Could you help me to understand why there is no Routes?
 
Best,
Alper
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R.Vinob chander | 28 Aug 02:50 2015
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keyboard problems

Hi All,
  With instant contiki3 on vmware fusion or virtual box om mac, many keys do not function as expected. e.g <at> does not map to shift+2, / maps to shift+7 etc.

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Assistant Professor, Department of IT
SSN College of Engineering,
Old Mahabalipuram Road
Kalavakkam - 603 110
Tamil Nadu, India

Phone: +9144-27469700 , +91 44 27474844/45/46
Extn: 370
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R.Vinob chander | 28 Aug 02:11 2015
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hello world on sky

Hi all,
 Running hello-world in instant contiki3 gives me the following error:

user <at> instant-contiki:~/contiki-3.0/examples/hello-world$ make TARGET=sky login
fatal: Not a git repository: '../../.git'
../../tools/sky/serialdump-linux -b115200 /dev/ttyUSB0
../../tools/sky/serialdump-linux: 1: ../../tools/sky/serialdump-linux: Syntax error: Unterminated quoted string
make: *** [login] Error 2


--
R. Vinob chander, B.E., M.E., (Ph.D)
Assistant Professor, Department of IT
SSN College of Engineering,
Old Mahabalipuram Road
Kalavakkam - 603 110
Tamil Nadu, India

Phone: +9144-27469700 , +91 44 27474844/45/46
Extn: 370
Mob: +91-9566101580

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R.Vinob chander | 27 Aug 16:23 2015
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contiki3 tutorials

Hi All,
 I could not run contiki 3 programs after unzipping the source files in ubuntu 14.04 LTS. Neither could i start the cooja simulator. i have installed the necessary toolchains for msp430 and avr mcs. No issues with contiki 2.7 programs though. What might be the problem? More particularly my problems are:
   - make login error 255...open: invalid argument (device getting detected and able to upload the programs though)
   - cooja not starting..mspsim module problem

unzipped contiki3 from:
unzipped contiki 2.7 from: (works fine on Truty Thahr)

Plannnig to check out instant contiki3 on Mac. Are there any good resources to deep dive into contiki3. 


--
R. Vinob chander, B.E., M.E., (Ph.D)
Assistant Professor, Department of IT
SSN College of Engineering,
Old Mahabalipuram Road
Kalavakkam - 603 110
Tamil Nadu, India

Phone: +9144-27469700 , +91 44 27474844/45/46
Extn: 370
Mob: +91-9566101580

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Song Yu | 27 Aug 13:35 2015
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what's the steps to port contiki to a new platform

Hi All:

this is the first time in my life to use a mailing list(why there isn't a forum?), hope it wont cause any trouble.

I'm developing a firmware of a communication SoC of our own, based on ARM11, all the peripherals are implemented by ourself. the chip has taped out, and I've made the firmware work with Linux GNU tool chain, the bin file could work on board.

Now i'd like to port the contiki OS to our platform, and have read a lot of guides and discussions(for weeks), but it seems everybody is using a chip on the market... so i'm not sure how difficult is it to bring it to our own platform.

OK, I was planning the first step is to build a basic "hello world" program with clock and uart implemented for contiki, but the uart confused me.

For example, the example project cc2538, in platform/cc2538dk/contiki-main.c, there is two kinds of output: printf and puts. it seems the printf is calling the stdio lib function and the puts is using the uart, so i think the printf contents will not appear on the uart output, am I right?

i've checked the final assembly. from the result i can see the printf didn't call anything related to the uart.

So why there is printf, anyway.

And how can I connect the standard printf library to my uart all the time? In contiki wiki it says the printf is calling putchar and the putchar is platform dependent, but i cannot find any clue the printf will call the user-implemented uart related code.

and as the title, I'm so thankful if anyone could give me a list of contiki porting step by step. i've familiar with the concepts like process etc.

thank you very much.



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Emmanuel Stapf | 26 Aug 23:46 2015
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Big log file: How to use the function cfs_coffee_reserve() ?

Hi all,

I am developing a program for the TelosB node where I want to log received packets in a file using the coffee file system. For the logging I want to use as much external flash memory as possible from the overall amount of 1 MB.

Unfortunately, when I am running my program the  log file is just filled up to a size of around 500000 Bytes.
So I read that I should reserve the right amount of memory for the file before opening it.

I tried using cfs_coffee_reserve() for that in such a way:


static char* filename = "sniffer_log.txt";
long file_size = 65536   // 1 sector = 256 pages

cfs_coffee_reserve(filename, file_size);

....

fd_write = cfs_open(filename, CFS_WRITE | CFS_APPEND);
cfs_write(fd_write, recv_pkt, length);


I found in cfs-coffee-arch.h that the default value of reserved memory for a file when opened is COFFEE_DYN_SIZE=4*1024, which equals the size of 16 pages in memory. So as you can see in the code I tried to reserve more memory which should result in 256 pages.
But when I run the code the file gets just filled to an even lower size of around 260000 Bytes.

I checked the implementation of cfs but it seems that I am missing something. No matter which value I choose for the file_size I can't log more data.
How exactly do I have to use the function cfs_coffee_reserve so that I can use the whole 1MB for logging?


Regards,

Emmanuel
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Sedat Bilgili | 26 Aug 14:40 2015
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Contiki 3.0 git and jar problems, and JAVA_HOME problem

Hello,

I downloaded InstantContiki 3.0 today. There were some git and jar problems but i solved them. I assume newer instant contiki 3.0 will correct them.

Now when i run Cooja, JAVA_HOME enviroment variable seems [null]. I checked JAVA_HOME env. variable and it seems correct.

So when i try to add a mote it gives me an error about not finding jni.h naturally because JAVA_HOME is null and i can't correct this.

I tried EXPORT JAVA_HOME=/"this is java's folder" command and it already is set (i checked with echo $JAVA_HOME)

How can i correct this ?

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Gmane