Troubleshooting

Question:

When I run make in the RIOT repository, I get something like:

mkdir -p 
mkdir: missing operand
Try 'mkdir --help' for more information.
Makefile:6: recipe for target 'all' failed
make: *** [all] Error 1

What am I missing?

Answer:

You have to run make from within your application directory, not directly from the RIOT repository.

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Question:

When I try to build my newly created application I get: bin/msba2/swsoci/core.a(kernel_init.o): In function kernel_init': kernel_init.c:(.text+0x9c): undefined reference to main' collect2: ld returned 1 exit status

Answer:

Make sure that you have

1. correctly set the APPLICATION environment variable and
2. appended UseModule <your_application_name> to the application's Makefile

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Question:

My MSB-A2 hangs in a reset loop and remains unflashable. How can I recover this node?

Answer:

Please visit How to Recover a unflashable MSB-A2

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Question:

The linker says something like RIOT/cpu/lpc2387/linkerscript.x:221 cannot move location counter backwards (from 4000fb4c to 4000ec98). What's wrong?

Answer:

Your application is too big and won't fit into RAM or the ROM of the target platform.

Question:

The flashtool says something like You don't have permission to access /dev/ttyUSB0. What's wrong?

Answer:

You need to edit your udev rules.

First create a group for your serial device (e.g. serial) and add the current user.:

addgroup serial
usermod -a -G serial ${USER}

Then use lsusb to find out the Vendor and Product ID for your device. Afterwards, add the following line to the file /etc/udev/44-serial.rules (replace <idVendor> and <idProduct> with the previously determined IDs, respectively).

ATTR{idVendor}=="<idVendor>", ATTR{idProduct}=="<idProduct>", GROUP="plugdev", MODE="0664"

Reload udev rules:

udevadm control --reload-rules

Question:

Flashing of a device somehow does not work although it should / did before.

Answer:

Try a different USB port/hub or a shorter cable.