On Tue, Aug 31, 2010 at 6:40 PM, Marko Thaler <
address@hidden> wrote:
> Hello everybody,
>
> I am testing the new Lisa on a quadrotor and have a few questions:
> - I use Lisa with MKK ESCs. Has anybody encountered a freeze of ESCs while
> in flight? The red LEDs on all the MKK ESCs turn on and all the motors shut
> down. This happens while Lisa is running normally. I have tested all the I2C
> cabling but haven't observed anything unusual. Sometimes red LEDs turn on at
> power up, but after a reset everything is normal and functioning properly.
> - I am new to gdb (been previously using CrossWorks from Rowley). Is there a
> quick and dirty procedure write up on how to connect to Lisa? I had a couple
> of tries to attach gdb (gdbserver) to a running Lisa but with no luck.
> - When I do not have the MKK ESCs connected to the I2C port and the
> autopilot code is running, I can freeze the code with holding the throttle
> stick in the motor on/off position (down and right) for a couple of seconds
> (anything from 3 to 20 seconds). This condition is not always reproducible
> so sometimes it needs a couple of retries (go to center position and than
> back to down and right). I could practically always reproduce the freeze in
> the first three tries when ap_mode is in ATTITUDE_Z_HOLD. When in
> ATTITUDE_RC_CLIMB and ATTITUDE_DIRECT the freeze is rarely reproducible. The
> freeze never happened when ESCs were connected to Lisa.
>
> I know you should not abuse Lisa in this way, I am just writing up my
> observations if anybody encounters something similar.
>
> I will examine all the unusual behaviour in the code myself as soon as I get
> more comfortable with gdb (any help is deeply appreciated :).
>
> Thanks for your input and kind regards,
>
> Marko
>
>