DCCPacketScheduler::opsVerifyCV()

[KermMartian]

I'm sure it's something you've considered, but support for a DCCPacketScheduler::opsVerifyCV() method to match DCCPacketScheduler::opsProgramCV() would be great. Let me know if I can help. TIA!

[UncannyBingo]

That's a great idea. However, verifying ops mode writes—if I recall correctly—requires RailCom hardware, for which I don't have a design or prototype to test this kind of thing. I'm not at all opposed to your proposal, as I want to start exploring RailCom, but I'm curious if you have a proposal for an easy to build hardware accessory to support ops verifies?

[KermMartian]

I must admit that I'm only becoming familiar with the DCC protocol now for my CalcDCC project; my previous experience has all been with DC control. I do have EE experience, though, so I'll explore what this would require and get back to you.

[UncannyBingo]

If you haven't, you should have a look here: http://www.nmra.org/sites/default/files/s-9.3.2_2012_12_10.pdf

[KermMartian]

Looks reasonable enough. I suspect their circuit is unnecessarily complex for a first iteration, since it precisely detects decoder responses only within the spec. An alternative, much simpler design looks worth a try to me: http://usuaris.tinet.cat/fmco/dccgen_en.html#ack . If I can find an optoisolator lying around my parts box, I'll give it a try.

[UncannyBingo]

Nice find! I look forward to hearing your results!

Don't forget you'll need a RailCom-capable detector (most TCS decoders have it as an un-advertised feature)