Re: [Paparazzi-devel] paparazzi Lisa/M v2 magnetometer not working?

[Gautier Hattenberger]

We had a similar problem using directly the hmc5883 (not through the mpu 
like aspirin). It seems that if you configure the reading mode (to 
continious mode) before the first initial reading of the sensor (which 
occurs after 1.3s in the worst case), the configuration is reset to 0 
(one shot mode).
This problem is solved for all IMU using the general hmc58xx driver (in 
sw/airborne/peripherals) but I think it is not the case of the aspirin 
V2.1 which is controlling the mag as a slave of the mpu 
(sw/airborne/subsystems/imu/imu_aspirin_2_spi.c), so not using the 
direct driver.
I suggest to add a delay before the configuration of the mag, I think 
this will solve your problem.

Gautier

Le 04/07/2014 12:34, oberthold a écrit :
> address@hidden writes:
>
> > I have a paparazzi Lisa/M v2.0 (W/ Aspirin V2.1) which I am having
> > troubles getting the magnetometer working properly.
> >
> > What I am doing to test & try getting it all worked out is via the
> > telemetry link I have set up via an xbee modem, and using the GCS
> > (ground control station) to change the flight mode to raw_sensors, the
> > monitor the responses in the "messages" window.
> >
> > So the gyroscope works great, as does the accelerometer (which I
> > calibrated and put the results in my airframe file) but the magnetometer
> > DOES have values for it, but they never change, no matter how I orient
> > the craft  (quadcopter) [X configuration] do the values change.
> > HOWEVER, what is weird is that whenever the Lisa/M is power-cycled, then
> > switched back into raw_sensors mode, the values are different.  So it's
> > like they work....  but don't update.
> >
> > Any clue what could be wrong?
> just adding to this: i seem to have the exact same problem, only i
> wasn't describing it as verbosely [1]. so setting telemetry to
> raw_sensors and observing the ACC/GYRO/MAG values the former two are ok
> but MAG values don't change (in about 8 out of 10 power
> cycles, lisa/m v2, aspirin v2.2, current master).
>
> bst, opt
>
> [1] https://lists.gnu.org/archive/html/paparazzi-devel/2014-07/msg00011.html
>
> _______________________________________________
> Paparazzi-devel mailing list
> address@hidden
> https://lists.nongnu.org/mailman/listinfo/paparazzi-devel