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Re: [Paparazzi-devel] MeekPE PPM encoder Problem.


From: Michel GORRAZ
Subject: Re: [Paparazzi-devel] MeekPE PPM encoder Problem.
Date: Wed, 14 Mar 2012 20:28:10 +0100

Hi,
(Christophe you're right) MeekPE can only be used with receivers that output their pulses one after each other. But it already make it work with a Spektrum one in the past.
If i remember correctly, on some Spektrum receiver, servo connector arrangement in not related to the channel order : first position connector is not necessarily channel one and next connector position doesn't mean next channel number.
Oscilloscope is your friend :)

@+


2012/3/14 Christophe De Wagter <address@hidden>

Does MeekPE work with spectrum? Please correct me if I am wrong but I thought it could only be used with receivers that output their pulses one after each other like any 35MHz but like almost no digital receiver.

On Mar 14, 2012 5:54 PM, "Luiz Flavio Felizardo" <address@hidden> wrote:
 Hi there everyone.
 I had to change from spektrum radio to a chinese generic one. So we made a MeekPE PPM Encoder Board, with all set as the page of the enconder describes. but the PPM signal refuses to show up on pprz, we did some tests on the osciloscope and we could see the signals leaving the ppm board towards lisa. Any ideas on what might be wrong? 

Airframe file:  
<subsystem name="radio_control" type="ppm"/>  
<define name="TELEMETRY_MODE_FBW" value="1"/>


<!DOCTYPE radio SYSTEM "radio.dtd">
<radio name="generic" data_min="800" data_max="2200" sync_min="5000" sync_max="15000" pulse_type="POSITIVE">
<channel ctl="D" function="THROTTLE" min="1000" neutral="1000" max="2000" average="0"/>
<channel ctl="C" function="ROLL"     min="1000" neutral="1500" max="2000" average="0"/>
<channel ctl="B" function="PITCH"    min="2000" neutral="1500" max="1000" average="0"/>
<channel ctl="A" function="YAW"      min="1000" neutral="1500" max="2000" average="0"/>
<channel ctl="G" function="SWITCH1"  min="1000" neutral="1500" max="2000" average="1"/>
<channel ctl="E" function="MODE"    min="1000" neutral="1500" max="2000" average="1"/>

ps.: channel 6 in the radio is supose to be the mode selector.

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