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Viewing changes to test/receiver/pulse-width-x8/main.ino

  • Committer: Tim Marston
  • Date: 2013-11-21 00:05:58 UTC
  • Revision ID: tim@ed.am-20131121000558-06xtcb4fue72td7q
updated 8-channel pulse width reading test program's comments

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test/receiver/pulse-width-x8/main.ino
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// available, reading the analogue outputs is certainly more portable.  So, we
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// are multiplexing the separate channels to two streams of pulses, like this:
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//
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//     ch.1  ch.3  ch.5  ch.7  ch.2  ch.4  ch.6  ch.8
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//       |     |     |     |     |     |     |     |
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//       ▼     ▼     ▼     ▼     ▼     ▼     ▼     ▼
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//       ¯     ¯     ¯     ¯     ¯     ¯     ¯     ¯
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//       |     |     |     |     |     |     |     |
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//       '-----+-----+-----+     +-----+-----+-----'
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//                         |     |
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//    ____________________ | ___ | _____________________
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//                         |     |
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//         (int. 0) pin 2  o     o  pin 3 (int. 1)
 
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//                  ch1  ch3  ch5  ch7  ch2  ch4  ch6  ch8
 
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//                   |    |    |    |    |    |    |    |
 
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//                   ▼    ▼    ▼    ▼    ▼    ▼    ▼    ▼
 
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//                   ¯    ¯    ¯    ¯    ¯    ¯    ¯    ¯
 
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//            ___    |    |    |    |    |    |    |    |     ___
 
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//    GND ---|___|---+----+----+----+    +----+----+----+----|___|--- GND
 
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//             R                    |    |                     R
 
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//             ____________________ | __ | _____________________
 
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//                                  |    |
 
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//                  (int. 0) pin 2  o    o  pin 3 (int. 1)
 
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//
 
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// The two resistors in the circuit are pull-down resistors.  Without them, the
 
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// Arduino is unable to read the pulse wave (I guess because of the diodes --
 
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// it's fine without them!).
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//
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// (Note that on our receiver, and contrary to the above diagram, the channels
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// are not actually sent in order.  Channels 2 and 3 are reversed.  To this end,