Discussions

HI All.

I've been going through the PPM Encoder software, and its taking some time to understand it enough to answer this question.

I have connected an RPM sensor (IR Opto through a hole in the main rotor shaft), to a spare input on my APM board (input No 5).  I want to have the board control engine / rotor RPM as well as fly.

When I'm starting up, the rotor is stationary or course so there is no change of signal on the RPM input. So my brief look at the PPM encoder code leads me to think that the input is ignored after that moment.

The timing of this signal, will also not be in sync with the other inputs from the RX.

Does anyone familiar enough with the PPM Encoder think this last issue, and the fact that at startup there is no pulse (it may be stopped 1 or 0 though), think that this would work as is ?

I may have to change the min and max timing on this input anyway, because the range is way out of 1-2mS normal for servos. But I if this is all thats required then I think the job is simple.  I didn't want to have to completely rewrite the PPM s/ware.

Thoughts please ?