Re: [Paparazzi-devel] First power-up of Autopilot OK, some questions

[Martin P]

Servos: hardware problem. 
With Chebuzz' help I fiddled around trying to see some signals on the scope. 
Touched something by chance and for a few moments I was able to control the 
servo with the radio. 

-------- Original-Nachricht --------
> Datum: Tue, 26 May 2009 10:15:30 -0700
> Von: David Conger <address@hidden>
> An: address@hidden
> Betreff: Re: [Paparazzi-devel] First power-up of Autopilot OK, some   
> questions

> Hello,
> 
> For #3 take a look here on my RCGroups thread. I had hoped this info  
> would make it to the Wiki eventually:
> http://www.rcgroups.com/forums/showpost.php?p=11632208&postcount=1183
> 
> For #4 take a look here:
> http://www.rcgroups.com/forums/showpost.php?p=12313331&postcount=1632
> Likely (guessing) your makefile declaration is for a Tiny2.1 not  
> Tiny2.11 where the resistor bridge value needs to be modified to  
> report the proper voltage. It's done in software and easiest to just  
> use the right inclusion per the reply on the post I give above. FYI:  
> TWOG and Tiny2.11 use the same declaration|value.
> 
> For #5 are you sure you used the pinout for the autopilot and then  
> modified the funjet1.xml to associate the proper servo ports? Pinouts  
> for Tiny2.11/TWOG are on the Wiki:
> TINY 2.11: http://paparazzi.enac.fr/wiki/Tiny_v2#Pinout
> TWOG: http://paparazzi.enac.fr/wiki/Twog_v1#Pinout
> Servo code section in funjet1.xml:
> "<!-- commands section -->
>    <servos>
>      <servo name="MOTOR"         no="0" min="1000" neutral="1000"  
> max="2000"/>
>      <servo name="AILEVON_LEFT"  no="2" min="1130" neutral="1500"  
> max="1880"/>
>      <servo name="AILEVON_RIGHT" no="6" min="1980" neutral="1515"  
> max="1170"/>
>    </servos>"
> "no=" is the value given in the pinout for the "SRV0" or  
> "SRV1" ..."SRV7".
> 
> Hope this helps.
> 
> -David Conger
> 
> 
> On May 26, 2009, at 1:46 AM, Martin P wrote:
> 
> > Hello all!
> >
> > With your help, I made some progress. Thanks again. Not  
> > surprisingly, more questions have arisen.
> >
> > 1) Xbee:
> > I got a pair of 2,4GHz xbee's for at least until the duty cycle  
> > issue is solved. Maybe it is even illegal to use more than 10% duty  
> > cycle with the xbee 868. The 2G4 modems work great, so far.
> >
> > 2) Calibrating the IR's:
> > I put the sensors in a styrofoam box and got the readings from the  
> > messages window. The horizontals were around 300, while the vertical  
> > was zero and increased slowly. They all drifted. Is this normal? If  
> > yes, should I wait until they stop drifting or should I take the  
> > inital values, or average?
> >
> > 3) IR sensor orientation
> > I'll probably find out which thermopile is which, but I did not find  
> > any hint on this. Which one is the top, which is the bottom? Which  
> > is the fore, aft, left and right sensor? I mean mechanically, for  
> > mounting on the airframe.
> >
> > 4) Battery voltage:
> > I connected a 3S lipo battery with roughly 12V, but the GCS reports  
> > something like 8V and in the terminal section I get messages like  
> > catastrophic lo batt voltage.
> > Do I have to adjust something?
> >
> > 5) Servos:
> > I tapped the receiver and I am able to switch to manual, auto1 and  
> > auto2 modes with the transmitter. I connected a servo and expected  
> > to be able to control it in manual mode by moving the transmitter  
> > sticks.
> > Tried different servo connectors on the Tiny, no luck.
> >
> > I am using the original funjet1.xml (which I will have to change  
> > because I will not (yet) fly a Funjet). In the messages window, I  
> > can see that the actuators react to the movement of the sticks.  
> > Tried to see the PWM signals on the scope. Did not see any pulses,  
> > all of the servo signal pins were constantly hi.
> >
> > Since I was indoors, I did not have a fix. Do I have to wait until I  
> > get a fix before attempting to control the servos?
> >
> > Greetz, Martin
> >
> >
> > _______________________________________________
> > Paparazzi-devel mailing list
> > address@hidden
> > http://lists.nongnu.org/mailman/listinfo/paparazzi-devel
> 
> 
> 
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