[Paparazzi-devel] Using PPM signal from a Graupner HoTT receiver?

[Simon Liebold]

Hello all (and a happy new year!),

The past couple off weeks were too boring and I decided to pull my Paparazzi hardware (Umarin v2) out of the box and to give it another shot. Finally things started to come to life and the servos now respond on movements of the sensors (mode 1). Woohoo!

So far I was using an PPM encoder board (8 channel radio.xml setup). Now I found this article on the Wiki about switching the output of an Graupner Hott Receiver to PPM (http://paparazzi.enac.fr/wiki/Graupner_HOTT_setup). That would mean I don't need the encoder board and the bunch of connecting cables. Less parts = less trouble. At least that is what I am hoping.

Following the article, I set the receiver output to "SUMDFS06" (six channel of my MX-12 model), changed the radio.xml to six channels and connected the cable from port 1 or port 6 (tried both) of the receiver to the AP but no dice. It is still logging "RC 0,0,0,0,0,0".

I mean, I still could go back using the encoder board. But I thought I'd ask here first. Has anyone had some experience with that? Is this worth pursuing?


Simon

My radio.xml (the last two channels are commented out):

<radio name="mx-12" data_min="967" data_max="2033" sync_min="5000" sync_max="15000"
 pulse_type="NEGATIVE">
 <channel ctl="QUERRUDER" function="ROLL" min="1900" neutral="1500" max="1100" average="0"/>
 <channel ctl="HOEHENRUDER" function="PITCH" min="1900" neutral="1500" max="1100" average="0"/>
 <channel ctl="MOTOR" function="THROTTLE" min="1100" neutral="1100" max="1900" average="0"/>
 <channel ctl="SEITENRUDER" function="YAW" min="1900" neutral="1500" max="1100" average="0"/>
 <channel ctl="ROCKER" function="MODE" min="1100" neutral="1500" max="1900" average="1"/>
 <channel ctl="NOT_CONNECTED" function="UNUSED" min="1100" neutral="1100" max="1900" average="1"/>
 <!--<channel ctl="BOGUS1" function="UNUSED" min="1100" neutral="1100" max="1900" average="1"/>
 <channel ctl="BOGUS2" function="UNUSED" min="1100" neutral="1100" max="1900" average="1"/>-->
</radio>