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 Robotics / RCX / NQC / 1660
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Subject: 
Re: RCX to Spy messages thru IR communications route
Newsgroups: 
lugnet.robotics.spybotics, lugnet.robotics, lugnet.robotics.rcx, lugnet.robotics.rcx.nqc
Date: 
Fri, 26 Mar 2004 21:13:40 GMT
Viewed: 
832 times
  
In lugnet.robotics.spybotics, Jay Francis wrote:
I'm a little surprised that the Spybot doesn't need to see the packet header
byte - the byte containing the range/orientation bits preceding the 0x8n Ping
byte.  The header is deliberately generated with the stop bit cleared to force a
framing error.  I thought it was a convenient (or necessary??) method for the
Spybot to detect a start of packet.

Does your IR monitoring see this byte - or does it get gobbled up due to the
framing error?

I presume that somewhere that data is being dropped.  It isn't showing up as
data the tower reports to the operating system.

I haven't actually tried the function I posted the other day so it is entirely
possible that a Spybot will not recognize it as a valid Ping.

Have you tried it yet?

John Hansen
http://bricxcc.sourceforge.net/



Message has 1 Reply:
  Re: RCX to Spy messages thru IR communications route
 
(...) Hi John, It does work. The RCX appears in the Spybot's World Table. The Range is set to Anywhere. Pretty cool... --Jay (21 years ago, 29-Mar-04, to lugnet.robotics.spybotics, lugnet.robotics, lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)

Message is in Reply To:
  Re: RCX to Spy messages thru IR communications route
 
I'm a little surprised that the Spybot doesn't need to see the packet header byte - the byte containing the range/orientation bits preceding the 0x8n Ping byte. The header is deliberately generated with the stop bit cleared to force a framing error. (...) (21 years ago, 25-Mar-04, to lugnet.robotics.spybotics, lugnet.robotics, lugnet.robotics.rcx, lugnet.robotics.rcx.nqc)

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