RunRyder RC
WATCH
 1 page 4705 views POST REPLY
HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › PCM1024Z protocol
04-29-2003 08:24 PM  15 years agoPost 1
Angelos

rrKey Veteran

nr Oxford, OX11, UK

My Posts: All  Forum  Topic

I am happy to say that after weeks of extensive testing I have
figured out all the details of PCM1024Z protocol and I have developed
I fully working 10 channel PCM decoder. All features of PCM receivers
are implemented including battery failsafe, DSC, etc. See pictures of
the prototype here:

http://www.model-gadgets.com/tmp/pcm.htm

The decoder performed flawlessly for several hours with my computer
monitoring its outputs so I paired it with a GWS receiver front end
and took it in the air in my Zagi. Everything worked fine. The range
check is excellent (in fact better than my Futaba R149DP) so it is
time to go higher with an power model.

-Angelos

PM  EMAIL  GALLERY  Attn:RR  Quote
04-29-2003 08:41 PM  15 years agoPost 2
irq

rrKey Veteran

San Diego, CA

My Posts: All  Forum  Topic

*drool*, Amazing. What can you do with the debug port? Actually, I'd really appreciate hearing any extra information you have on this

PM  EMAIL  Attn:RR  Quote
04-29-2003 08:43 PM  15 years agoPost 3
z11355

rrMaster

New England

My Posts: All  Forum  Topic

Really very impressive reverse engineering.

PM  EMAIL  GALLERY  Attn:RR  Quote
04-29-2003 08:57 PM  15 years agoPost 4
Angelos

rrKey Veteran

nr Oxford, OX11, UK

My Posts: All  Forum  Topic

irq,
the debug port has ground and two programmable pins that help me check how the firmware works. I connect these to the oscilloscope and get the firmware to drive them so I can observe internal operations. One of these is programmed to generate one pulse for each frame that was received with errors so I can hook up a counter there and see how it performed in flight. The other pin generates a synchronization pulse that triggers the oscilloscope in order to lock at the beginning of the frame that I want. There are 4 different types of frames containing different information.

z11355,
don't call it reverse engineering because it is illegal In fact I did nothing more than observing the data stream then re-engineer a decoder

PM  EMAIL  GALLERY  Attn:RR  Quote
04-29-2003 09:05 PM  15 years agoPost 5
z11355

rrMaster

New England

My Posts: All  Forum  Topic

but thats allowed if that is how you did it (ie.
clean room external visibility)

PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 1 page 4705 views POST REPLY
HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › PCM1024Z protocol
 Print TOPIC  Make Suggestion 

 2  Topic Subscribe

Wednesday, November 21 - 8:30 pm - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

The RC discussion world needs to consolidate. RR is now one choice for that. Its software is cutting edge. It hosts on-topic advertising. Help RR increase traffic buy making suggestions, posting in RR's new areas (sites) and by spreading the word.

The RunRyder Difference

• Category system to allow Rep/Vendor postings.
• Classifieds with sold (hidden) category.
• Classifieds with separate view new.
• Answer PMs offsite via email reply.
• Member gallery photos with advanced scripting.
• Gallery photo viewer integrated into postings.
• Highly refined search with advanced back end.
• Hosts its own high end fast response servers.
• Hosts thousands of HD event coverage videos.
• Rewrote entire code base with latest technology.
• No off-topic (annoying) click bait advertising.
Login Here
 New Subscriptions 
 Buddies Online