/elec/quadcopter : revision 11

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added pulse-width reading test program that reads all 8 channels

added added

removed removed

// available, reading the analogue outputs is certainly more portable. So, we

// are multiplexing the separate channels to two streams of pulses, like this:

// ch1 ch3 ch5 ch7 ch2 ch4 ch6 ch8

// | | | | | | | |

// ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼

// ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯

// ___ | | | | | | | | ___

// GND ---|___|---+----+----+----+ +----+----+----+----|___|--- GND

// R | | R

// ____________________ | __ | _____________________

// | |

// (int. 0) pin 2 o o pin 3 (int. 1)

// The two resistors in the circuit are pull-down resistors. Without them, the

// Arduino is unable to read the pulse wave (I guess because of the diodes --

// it's fine without them!).

// ch.1 ch.3 ch.5 ch.7 ch.2 ch.4 ch.6 ch.8

// | | | | | | | |

// ▼ ▼ ▼ ▼ ▼ ▼ ▼ ▼

// ¯ ¯ ¯ ¯ ¯ ¯ ¯ ¯

// | | | | | | | |

// '-----+-----+-----+ +-----+-----+-----'

// | |

// ____________________ | ___ | _____________________

// | |

// (int. 0) pin 2 o o pin 3 (int. 1)

// (Note that on our receiver, and contrary to the above diagram, the channels

// are not actually sent in order. Channels 2 and 3 are reversed. To this end,