RC Pulse receiver-decoder 200 to 2500usec

hgrueneis · Joined: 04 Apr 2009 Posts: 902 Location: A-4786 Brunnenthal

Hi,
some time ago , I did an 8-channel pulse decoder to decode the signals from an RC-receiver.
The system is based on an AT168 with a 5V supply and an external 24MHz osc. (not Q) and works good.
Tested several AT168 (smd and pin versions) with it and had no failure.
Reason for this is the fact that the servos can be controlled by MCU's instead of the receiver.
Capability of the decoder: 200 to 2500 microsecond (0.2 to 2.5msec) pulses on eight channels without glitches.
It works on systems that transmit pulses in an offset fashion serially (like the Spectrum).
The program is somewhat crude but works.
Works as slave SPI but can be modified for any other communication.

If anybody is interested in it, I will post the Bascom program here.
Can not be used commercially.
Regards
Hubert

luizabbadia · Joined: 11 Dec 2007 Posts: 112 Location: rio de janeiro

Yes, please.
I´m interested.Thanks

hgrueneis · Joined: 04 Apr 2009 Posts: 902 Location: A-4786 Brunnenthal

Here is the file

luizabbadia · Joined: 11 Dec 2007 Posts: 112 Location: rio de janeiro

Thanks!

Printpix52 · Joined: 18 Jun 2014 Posts: 282 Location: D.F.

Hello!!
As calculated in 41.66 nsec? Rolling Eyes

Regards!!

Printpix52 · Joined: 18 Jun 2014 Posts: 282 Location: D.F.

It is for 24 mhz = 41.66nseg Very Happy

As step 6300 is calculated? I could explain? Sorry for the inconvenience.

Crying or Very sad

hgrueneis · Joined: 04 Apr 2009 Posts: 902 Location: A-4786 Brunnenthal

@Pritpix52,
did you see the prescale of 8?
And 1 sec\24000000 cycles=41.66 nsec
Personally I use the info every 40 milliseconds for the servo update by my 16 ch. servo controller which is fed by an other MCU that reads the decoder and other MCUs 25 times per second (7 MCUs in all).
Use it or not.
Hubert

albertsm · Joined: 09 Apr 2004 Posts: 6025 Location: Holland

Thank you for sharing your work Hubert.
A nice example.