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- midelic
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On frsky you have every 3 tx frames one rx frame for telemetry..all frames sent every 9ms.
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- goebish
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- midelic
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- goebish
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- goebish
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- Daryoon
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Anyways, I did a longer capture. Shot video at the same time. Will link to that once it's uploaded.
Until then, summary of what I did:
Start video record and LA capture at the same time.
Turn on TX.
Plug in X4 lipo.
Press trim button down to turn off lights. Then press again to turn back on.
Press right stick in to switch to expert mode. Then switch back to normal.
Then I went into the Main Menu.
Then started to switch the frequency. It was at 5740Mhz. Proceeded to switch to the next frequency every ~2secs.
5735Mhz
5745Mhz
5750Mhz
5755Mhz
5760Mhz
5765Mhz
5770Mhz
5775Mhz
5780Mhz
LA capture completed 1B capture. So I switched off TX.
Hopefully you can see a pattern.
If not, I can repeat and go through all the frequencies with a longer capture window.
Additional info: Telemetry data should be enabled because I can see lipo voltage on the TX LCD.
Download: app.box.com/s/l5d08j2lqomy9u5bpux0
Video: Sorry about the low quality. Was messing with the software to keep the bitrate low...but I didn't think it was going to be THIS low. Upside, the video file was quick to upload to YouTube.
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- midelic
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- Xermalk
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Because they are not using a osd on the 5.8 ghz video.
The osd is added on the lcd by the tx. It doesn't show when recording with the tx. Or when using your own reciever.
And the voltage displayed is the quad battery voltage.
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- goebish
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Time for diner, I'll have a look after.
I doubt the telemetry comes from the 5.8GHz link.
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- midelic
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_spi_strobe(0xC0);0xC0
plus the timing every frame is sent every 10ms if there is no delay in between sent frames there is no telemetry.
Anyway it was too good to be true..
I think that voltage in the screen is tx internal voltage maybe from 5.8Ghz rx module...feed into mcu for monitoring.
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- goebish
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No, let me have a lunch and I'll crack itmidelic wrote: Anyway it was too good to be true..
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- goebish
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Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 34 00 2a db
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 33 00 2a dc
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 34 00 2a db
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 33 00 2a dc
Rx: ff 5f 00 33 00 13 00 01 00 00 00 01 2a 00 50 f0
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 33 00 2a dc
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 33 00 2a dc
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 34 00 2a db
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 33 00 2a dc
Rx: ff 5c 00 34 00 13 00 00 00 00 00 01 2a 00 53 f0
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 34 00 2b da
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 33 00 2a dc
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 34 00 2b da
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 34 00 2b da
Rx: ff 56 00 35 00 13 00 00 ff ff 00 01 2a 00 5a f0
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 33 00 2a dc
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 34 00 2b da
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 33 00 2a dc
Tx: 20 00 00 00 80 00 80 00 80 0e 19 00 34 00 2b da
Rx: ff 54 00 36 00 13 00 02 00 00 00 01 2a 00 57 f0
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- midelic
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- midelic
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- Daryoon
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Insert a new lipo. And it will show 4.19v again.
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- midelic
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- goebish
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midelic wrote: You said you use some program to "arrange" data.Which program you use?
Simple homemade code (C/Qt) that parse the salae logic spi decoder output, here's the code if you want to use it, takes data.txt as input.
pastebin.com/RhgkmZVP
And here's the data Daryoon has uploaded in Salae spi decoder output format:
speedy.sh/cAFys/data.zip
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- goebish
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speedy.sh/ZMznc/raw-data.zip
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- midelic
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thank you!Now is easier.
I couldn't do it myself here.I'm at work on company computer no administrative right cannot install programs.
Now is better.I can have a look.
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- goebish
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Is your logic analyzer plugged directly on an usb port or is it on a hub ?
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