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Re: [Paparazzi-devel] weird issue servo 5 on lisa/m2

From: Christophe De Wagter
Subject: Re: [Paparazzi-devel] weird issue servo 5 on lisa/m2
Date: Mon, 12 Nov 2012 17:44:48 +0100

Are you sure it is not making 400hz PWM? Most analog servo's can not cope with that and turn to one or the other extreme or vibrate like hell.


On Mon, Nov 12, 2012 at 3:16 PM, Gerard Toonstra <address@hidden> wrote:
Hi all,

I'm using the Lisa/M2 and my airframe has motor, rudder, elevator and two ailerons.
I'm using ppm on UART1_RX, an analog airspeed sensor on ADC1.

I'm currently in the process of testing the actuators and configuring trims.
All actuators on 1-4 are working. The one on servo 5 outputs something entirely
incorrect. The servo moves to the extreme minimum and stalls.

I've attempted to use servo6 as well (which is no="5" in airframe file?), but this also
doesn't help and produces similar output.

Is there anything I need to specify in the airframe to get the output to work correctly?
( I'm aware of the servo7/8 define, but this is 5/6).  I've looked at the code for ADC,
but couldn't figure it out if there was an issue with timers there. I just disabled the airspeed
sensor and DC cam, but this didn't help either. Any hints are welcome.



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