STM CircleOS forum / CAN FIFO overflow causes complete lockup, incl. independent watchdog

kubark42 · 2009-09-17 18:43:35

That was a frustrating forever trying to diagnose the problem. It turns out that if you read a couple registers from the CAN FIFO, but don't release the FIFO, that the entire Primer2 locks up and won't reboot, not even from a watchdog overflow. Definitely not what I would expect it to do, and not what the $1 indicates, either!

Whoops.

Francis · 2009-09-18 10:15:21

I have seen such situations only when 'looping' exception occur.
With the latest RIDE+RKit-ARM, the peripheral views have been completed, and are refreshed dynamically (on the fly). It is helpful to debug such issues.

kubark42 · 2009-09-22 15:26:31

I'm using the RIDE7 that I downloaded two weeks ago. Is this not the latest?

I unfortunately cannot debug this in situ, as I cannot place the computer next to the CANbus.

Last edited by kubark42 (2009-09-22 15:26:47)

Francis · 2009-09-23 12:09:36

If it is the latest, you can open the peripheral views and see the contents refreshed dynamically (on the fly). Perhaps it could help you. But, of course, you need to be connected while debugging...

kubark42 · 2009-09-30 14:41:07

What's the latest one? I downloaded Ride 7.24.09.0251 and RKit-ARM 1.22.09.0254, and I cannot see any of the bxCAN registers. The register window is there in the list, but when I open it, the window is empty.

Francis · 2009-10-01 07:27:08

You are right... a bug. We'll send you a patch.

# 1 2009-09-17 18:43:35 CAN FIFO overflow causes complete lockup, incl. independent watchdog

CAN FIFO overflow causes complete lockup, incl. independent watchdog

# 2 2009-09-18 10:15:21 CAN FIFO overflow causes complete lockup, incl. independent watchdog

Re: CAN FIFO overflow causes complete lockup, incl. independent watchdog

# 3 2009-09-22 15:26:31 CAN FIFO overflow causes complete lockup, incl. independent watchdog

Re: CAN FIFO overflow causes complete lockup, incl. independent watchdog

# 4 2009-09-23 12:09:36 CAN FIFO overflow causes complete lockup, incl. independent watchdog

Re: CAN FIFO overflow causes complete lockup, incl. independent watchdog

# 5 2009-09-30 14:41:07 CAN FIFO overflow causes complete lockup, incl. independent watchdog

Re: CAN FIFO overflow causes complete lockup, incl. independent watchdog

# 6 2009-10-01 07:27:08 CAN FIFO overflow causes complete lockup, incl. independent watchdog

Re: CAN FIFO overflow causes complete lockup, incl. independent watchdog

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