Re: [Paparazzi-devel] Changing telemetry files

[antoine drouin]

Hi Todd

A scope i a bit expensive. A tools that is way cheaper and that i
couldn't live without is the logic analyzer from saleae
(http://www.saleae.com/home/) - best of all, it works on linux

Regards

Poine



On Thu, Sep 23, 2010 at 10:17 AM, Todd Sandercock
<address@hidden> wrote:
> Hey all
> I verified that my receiver is working just by putting an LED and resistor
> on the ppm line and still couldn't get my RC link working at all. I even
> tried positive and negative pulses to see if that made a difference. I even
> used a transistor to reverse the polarity of the pulses still with no avail
> Soooo I pulled the 5806 revision off the SVN and it worked like a charm.
> I  added another couple channels to the radio file to see if it would still
> work and that was fine but when I made a radio file with 9 channels it
> didn't work again. That made me think that possibly my transmitter was
> actually sending 8 pulses even though it is a 6 channel transmitter.... Went
> back to the latest revision, made a radio file with 8 channels and now life
> is good again.
> Moral of the story is JR X2610 Transmitters send 8 pulses and if you have
> this problem buy an oscilloscope because it would be way easier to diagnose
> the problem.
> Thanks for everyone's help
> Todd
> ________________________________
> From: Eric Parsonage <address@hidden>
> To: address@hidden
> Sent: Tue, 21 September, 2010 8:37:01 PM
> Subject: Re: [Paparazzi-devel] Changing telemetry files
>
> Todd
>
> Revision: 5807
>          http://svn.sv.gnu.org/viewvc/?view=rev&root=paparazzi&revision=5807
> Author:   gautier
> Date:     2010-09-06 15:06:16 +0000 (Mon, 06 Sep 2010)
> Log Message:
> -----------
> Improve ppm decoding on lpc21: a valid synchro is needed to validate a ppm
> frame
> It also means that the number of channel between the radio and its config
> file has to match exactly
> In radio control: several valid frame are needed to go back to RC_OK
>
> Do you have the number of channels in your config matching ?
> Eric
>
> Mmmmm yeah that tells you that it's not working.
> I am going to have to find an oscilloscope. Or write something to debug it
> because it clearly isn't working and it used to work. With that change in
> the PPM decoder is there any way to see how many channels are actually
> coming through so that i can make sure that it's not just cutting the link
> because the number of channels in the radio file is different to what is
> actually happening??
> Still i would like to be able to change telemetry files anyway and currently
> if i change the files to others in the telemetry folder it wont compile.
> Does anyone else have this problem??
> Todd
> ________________________________
> From: Gareth Roberts <address@hidden>
> To: "<address@hidden>" <address@hidden>
> Sent: Tue, 21 September, 2010 6:33:10 PM
> Subject: Re: [Paparazzi-devel] Changing telemetry files
>
> What about the R/C status box in the GCS?  Or do you need something a bit
> less binary?
> --G
> On 21 Sep 2010, at 09:39, Todd Sandercock wrote:
>
> Hey all
> I was just trying to add some messages in the telemetry file so that i can
> check if my radio is actually getting through to paparazzi but it won't let
> me compile....
> I only added:
> <message name="RC" period="1.0"/>
> am i doing something wrong? Is there a better way of working out what's
> happening with my RC link?
> Thanks
> Todd
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