atmega_common: thread_arch.c

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1

Dear RIOT users,

I am trying to port our platform to RIOT. It is based on an atmega1284p and I wanted to use the atmega_common platform. However, the thread_arch.c is missing functions and my device is randomly restarting (with no reset reason), after about half a second after the first context switch happened (via an interrupt).

Is anyone using any platforms that rely on the atmega_common or has an idea what might be happening?

Best Regards, Robert

2

Hi Robert,

The current support of context switching relies in the use of “intentionally triggered” external interrupts, due to the lack of software interrupts on AVR8 MCUs.

Please take a look on the implementation of this feature for other boards, such as the arduino-mega2560 or waspmote-pro (board.h file). You’ll need a free EXTI pin on your custom board.

I don’t know if this is the cause of your resets, but it seems to me that this could be.

Best,

3

Hi again,

the interrupt ist trigged and occurs two times until the reset happens.

Best Regards, Robert

4

Hi Robert,

have you checked the state of your watchdog? A reproducable reset after a certain amount of time points in that direction...

Cheers, Hauke

5

Hi Hauke,

the watchdog is disabled (checked it right in the IRQ).

- Robert