SAMR21 ram overflow issue w/ rpl_udp example

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1

Hi RIOTers,

I am trying to compile the latest rpl_udp example for my SAMR21 Xpro. The compile was fine but I had an error message from the link. It bailed out with a ram overflow error.

~/RIOT/examples/rpl_udp$ make BOARD=samr21-xpro … /home/user/gcc-arm-none-eabi-4_9-2014q4/bin/…/lib/gcc/arm-none-eabi/4.9.3/…/…/…/…/arm-none-eabi/bin/ld: /home/user/RIOT/examples/rpl_udp/bin/samr21-xpro/rpl_udp.elf section .bss' will not fit in region ram’ /home/user/gcc-arm-none-eabi-4_9-2014q4/bin/…/lib/gcc/arm-none-eabi/4.9.3/…/…/…/…/arm-none-eabi/bin/ld: region `ram’ overflowed by 3544 bytes collect2: error: ld returned 1 exit status make: *** [all] Error 1

The toolchain version is “gcc version 4.9.3 20141119 (release) [ARM/embedded-4_9-branch revision 218278] (GNU Tools for ARM Embedded Processors)”. The RIOT source code was pulled off github as of today. Any suggestion? Thanks.

Regards,

Steve M.

2

Hi Steve!

The default routing table size is at 128 entries, that’s too much for the samr21-xrpo :slight_smile:

Can you try the following: BOARD=samr21-xpro make clean all RPL_MAX_ROUTING_ENTRIES=6 and see how this works out for you? You can even play a little bit around with the entry size, maybe you will find better values for your use case.

Cheers, Cenk

3

Thanks Cenk, It worked. I tried 64 and 32 before I posted the message. I should have tried smaller numbers.

Regards,

Steve

4

You could play with larger numbers with reduced stack size. Reduce the kernel stack size.

Akshay

5

Thanks, Akshay. Will try.

Regards, Steve M.