Re: [Paparazzi-devel] Aspirin v2.2 HMC data output FROZEN for IMU-MAG-RAW

[Sergey Krukowski]

Hallo!

Try to check if you can disturb the communication with the sensor by  
touching and trying to move it with the finger.
There could be a bad soldering.

Best Regards,
Sergey

> Hi,
>
> I haven't had this problem so far...
> It would probably be good to read the status register as well and react
> accordingly to the RDY or LOCK bits...
> Don't have time right now to look deeper into this (especially since I
> couldn't reproduce the problem).
>
> In the meantime, could you plz test the following:
> https://github.com/flixr/paparazzi/commit/8c55a843c2433d8d2ac025edb84e13f7b79cd29b
> This will try to reconfigure the hmc if a transaction failed, not sure  
> if a
> failed transaction is the problem though...
>
> Otherwise it probably needs proper debugging with the black magic  
> probe...
>
> Cheers, Felix
>
> On Tue, Jul 21, 2015 at 12:52 PM, banditniu <address@hidden> wrote:
>
> > HI,
> >
> >
> >
> >
> >
> >
> > Issue:  Aspirin v2.2 HMC data freezes after power-on
> > Description: After powering the IMU board, sometimes HMC58xx compass  
> > output
> > freezes. I have checked it by using IMU_MAG_RAW on telemetry/raw sensors
> > display.
> >
> >
> > When the issue occurs I have also checked the other sensors on the  
> > board,
> > it
> > seems IMU_ACCEL_RAW and IMU_GYRO_RAW are updated correctly.
> >
> > *issue*  I'm now on v5.4.The error counter of telemetry for IMU_MAG_RAW  
> > is
> > not increasing, it performs like this in the MESSAGE :
> >       imu_mag_raw:
> > <http://lists.paparazziuav.org/file/n17199/WP_20150720_22_17_33_Raw.jpg>
> >
> >
> >
> > After checking the HMC datasheet, I am suspicious about lock state of  
> > SR1
> > bit of HMC status register. Datasheet states that "When this bit is set,
> > the
> > six data output registers are locked and any new data will not be  
> > placed".
> >
> > I am still digging and try to solve this problem but I wonder that is  
> > the
> > issue board specific or has someone face an issue like that?
> >
> >
> >
> > Regards,
> >
> >
> >
> >
> >
> > --
> > View this message in context:
> > http://lists.paparazziuav.org/Aspirin-v2-2-HMC-data-output-FROZEN-for-IMU-MAG-RAW-tp17199.html
> > Sent from the paparazzi-devel mailing list archive at Nabble.com.
> >
> > _______________________________________________
> > Paparazzi-devel mailing list
> > address@hidden
> > https://lists.nongnu.org/mailman/listinfo/paparazzi-devel


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