Re: [Paparazzi-devel] Fwd: Eagletree Airspeed V3 on KroozSD

[Felix Ruess]

Hi,

although I don't really know why this happens, I suspect that it is a power issue at bootup (since it seems to work after reflashing) and the ets sensor somehow gets stuck.

Did you try to unplug and reconnect the sensor after power up?

The ETS_AIRSPEED message is directly sent by the airspeed_ets module (if you have the AIRSPEED_ETS_SYNC_SEND flag set to true) when you get a new measurement.

Hence you won't get this message if you can't get any measurements...

Hope that helps a bit,

Felix

On Sun, Jul 5, 2015 at 11:15 AM, Pascal Fust <address@hidden> wrote:

Hello,

although several entries have been written in this forum on this topic, I am still struggelling in getting the ETS-sensor to run repeatedly on I2C3 on my KroozSD. The sensor simply states a constant zero-value after a power-up without an upload of the firmware. Straight after a firmware upload, I'm getting acceptable values in the message toolbox. Even applying the delay as suggested with up to 4 secs didn't solve my problem.

One thing I noted in the message tool: when everything works fine (just after the firmware upload), I got two "folders" in the telemetry section - the AIRSPEED and the ETS_AIRSPEED. However, after a subsequent power-up, the ETS_AIRSPEED don't appear anymore.

What am I doing wrong here?

The Wiki states a different parametrizing of the ETS, if not connected to the I2C0. Since the KroozSD has no I2C0, I selected the I2C3. Where is the reason for an adaptation of the scales and offsets if connected differently, and what values will I need to apply on the I2C3?

My complete firmware file is attached, but the ETS section looks as follows:

  <modules>
   <load name="airspeed_ets.xml">                        
       <define name="AIRSPEED_ETS_I2C_DEV" value="i2c3"/>
       <define name="AIRSPEED_ETS_START_DELAY" value="1"/>
       <define name="USE_AIRSPEED_ETS" value="TRUE"/>     
       <define name="AIRSPEED_ETS_SCALE"   value="1.8"/>   
       <define name="AIRSPEED_ETS_OFFSET"  value="0"/>    
       <define name="AIRSPEED_ETS_SYNC_SEND"/>             
    </load>
....
  </modules>

  <firmware name="fixedwing">
    <target name="ap" board="krooz_sd">                     
       <configure name="FLASH_MODE" value="DFU"/>
    </target>     
    <target name="sim" board="pc"/>                         
      <define name="USE_I2C3"/>                    
      <define name="USE_AIRSPEED"/>          
....
  </firmware>

Thanks for your help.

Cheers, Pascal

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