Description
Description
While testing arduino-zero+xbee to samr21-xpro communication during the testing phase of 2018.10 I noticed, that sometimes the initialization of the network interface fails. To check what happened I used the DEBUG output and it apears to be an issue in the PAN ID initialization:
[xbee] AT_CMD: +++
[xbee] AT_CMD: ATMM2
[xbee] AT_CMD: ATAP1
[xbee] AT_CMD: ATAC
[xbee] AT_CMD: ATCN
[xbee] AT_CMD: SH
[xbee] AT_CMD: SL
[xbee] AT_CMD: CH�
[xbee] AT_CMD: ID
[xbee] api_at_cmd: response timeout
[xbee] init: error setting PAN ID
gnrc_netif: netdev init failed: -5
(CH also seems to be somewhat errorneous, as it prints a non-ASCII symbol)
I'm not 100% sure, but I think it happens if a reset happens while the device is sending something, but I also saw it directly on the first initialization after flash.
Would be great (or not so great for our stability) if someone can check if that also happens with xbee on other boards than arduino-zero.
Steps to reproduce the issue
Use a board (preferrably to make it easier one without a radio) and attach an xbee shield (e.g. arduino-zero in IoT-LAB. Compile gnrc_networking with the xbee module and flash it to the board and open the terminal. Try to reset several times, sometimes it works quite stable.
Expected results
Always reset to a workable state.
Actual results
Sometimes you will see the gnrc_netif: netdev init failed: -5 message shown above (or if you miss it, you won't be able to use the shell, since it isn't initialized due to the error).
Versions
IoT-LAB's arduino-zero + my local setup:
Operating System Environment
-----------------------------
Operating System: "Ubuntu" "16.04.5 LTS (Xenial Xerus)"
Kernel: Linux 4.4.0-138-generic x86_64 x86_64
Installed compiler toolchains
-----------------------------
native gcc: gcc (Ubuntu 5.4.0-6ubuntu1~16.04.10) 5.4.0 20160609
arm-none-eabi-gcc: arm-none-eabi-gcc (GNU Tools for Arm Embedded Processors 7-2018-q3-update) 7.3.1 20180622 (release) [ARM/embedded-7-branch revision 261907]
avr-gcc: avr-gcc (GCC) 4.9.2
mips-mti-elf-gcc: mips-mti-elf-gcc (Codescape GNU Tools 2016.05-03 for MIPS MTI Bare Metal) 4.9.2
msp430-gcc: msp430-gcc (GCC) 4.6.3 20120301 (mspgcc LTS 20120406 unpatched)
riscv-none-embed-gcc: riscv-none-embed-gcc (GNU MCU Eclipse RISC-V Embedded GCC, 64-bits) 7.2.0
clang: clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final)
Installed compiler libs
-----------------------
arm-none-eabi-newlib: "3.0.0"
mips-mti-elf-newlib: "2.1.0"
riscv-none-embed-newlib: "2.5.0"
avr-libc: "1.8.0svn" ("20111229")
Installed development tools
---------------------------
cmake: cmake version 3.12.0
cppcheck: Cppcheck 1.72
doxygen: 1.8.11
flake8: 2.5.4 (pep8: 1.7.0, pyflakes: 1.1.0, mccabe: 0.2.1) CPython 3.5.2 on Linux
git: git version 2.7.4
openocd: Open On-Chip Debugger 0.10.0+dev-00207-g4109263 (2017-11-02-16:35)
python: Python 2.7.12
python2: Python 2.7.12
python3: Python 3.5.2
coccinelle: spatch version 1.0.4 with Python support and with PCRE support