Replies to This Discussion

Permalink Reply by Sam on January 29, 2013 at 7:01am

I think I am seeing the same issue with different Spektrum gear. It popped up when I connected the gear channel to the Ardupilot: http://diydrones.com/forum/topics/spektrum-pwm-read-issue

Permalink Reply by Sam on January 30, 2013 at 6:57am

So my setup cannot be put into 11ms mode. Is anyone else having this issue with DSMX receivers? I dropped down to 4 PWM inputs and it may have helped the issue slightly but I'm still getting glitches in roll PWM values over 1600.

Permalink Reply by Eagle on February 20, 2013 at 7:16pm

Hi,

I solved my problem regarding the behavior of Spektrum DX8 Rx problems.

My setup is DSMX, 22 ms frame rate.

In order to validate that no channels are "glitching"... I used the Mission Planner Radio Calibration Tab and watched the "red lines"... If you ever did calibration you know what I'm talking about.  Basically MP will track any changes on the channels.

This is a picture after 15 minutes of monitoring:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Yaw peaked at 1907 because I did Arm the motors.  Throttle did go to 931 since I tested the Fail Safe.

Channel 7 never moved.... (for me, glitches were on Ch#7).  No wonder why my Quad was unable to finish mission since Chan#7 was configured to RTL :) ... the glitches were occuring every 15 secs or so. 

 

I solved this nightmare by upgrading APM2.5 PPM Encoder from version 2.2.65 to 2.3.13.

I followed these fine instructions.

Note: Be aware that when you short RST to GND, make sure Windows is switching USB drivers. Yes you hear the sound but make sure the driver is working!  I used Flip 3.4.7 to do the "flashing".  I used USB Drivers found in the package. I'm on Windows 7.

 

I hope I'm not missleading anybody here.

Cheers,

-Eric

 

Permalink Reply by Scott Berfield on February 21, 2013 at 10:54am

Hey Eric,

Thanks for the link to the flashing instructions. I am trying it right now and I cannot for the life of me get the PC to switch to the USB driver for the Atmel chip when I do the reset. I get the Disconnect/reconnect sound, but it just re-mounts the main Arduino Mega 2560 drivers. Any suggestions?

 

Scott

Permalink Reply by Eagle on February 21, 2013 at 5:16pm

Scott It work for me using the usb driver under the usb subdirectory of Flip 3.4.7

make sure you have a good connection for J2 jumper before the reset.

Permalink Reply by Scott Berfield on February 21, 2013 at 5:23pm

I'll try again. It never seems to see the Atmel chip on the connection. Maybe my jumper is faulty. time to get out the meter I guess.

Permalink Reply by Eagle on February 21, 2013 at 6:08pm

USB driver for APM is not the same as Flip use. 

During my tests I had some problems with faulty jumper...

...not sure that you need the meter.

I install J2 before connecting the APM to the USB port of my PC.

APM Driver:

 

 

 

 

 

 

 

After initialisation.

Short RTS to GND ... and another driver is use.

FLIP Driver:

 

 

 

 

 

 

 

 

Permalink Reply by Scott Berfield on February 21, 2013 at 9:58pm

OK - this is what I am doing/seeing.

1) Jumper on J2, board connected via USB to PC

2) Red LED is flashing, green power LED is on solid

3) On the PC, in the device driver, I see:

I touch a jumper wire to the two pads and hear the USB disconnect sound and see this in the Device Manager:

As you can see, the Arduino disappears.

4) If I keep the pads shorted, nothing more happens

5) If I release the short, I hear the USB connect sound and the Arduino reconnects using the stock drivers as above.

 

At no point do I have the option to tell it to connect using the other USB drivers.

Permalink Reply by Eagle on February 22, 2013 at 7:09pm

When windows asked me to locate drivers... I pointed the usb subdir in Flip.. Maybe try to remove Arduino driver and start from scratch regarding drivers for Windows.  Not sure what to tell you to help....

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