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// This software is intended to be run on a small Arduino (e.g., a Pro Mini),
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// whose purpose is dedicated to talking to the RC system. That is to say, it
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// listens to the PPM signal from the RC receiver and produces a compatible
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// single for the ESCs to control the motors. It additionally talks to the main
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// board via a trivial serial protocol. In so doing, this software relieves the
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// main board (and software running on it) of the task of interfacing with any
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// The 8 channels (from the RC receiver) need to be combined and fed to two
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// interrupts on the Arduino. They need to be combined in such a way as to
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// alternate pulses between the two interrupts (which are alternately used to
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// read the pulses). Like this:
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// ch1 ch3 ch5 ch7 ch2 ch4 ch6 ch8
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// ___ | | | | | | | | ___
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// GND ---|___|---+----+----+----+ +----+----+----+----|___|--- GND
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// ____________________ | __ | _____________________
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// (interrupt 0) (interrupt 1)
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// The two resistors in the circuit are pull-down resistors (so, say 100kΩ).
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// Without them, the Arduino is unable to read the pulse wave at all.
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// Note that your receiver may not send pulses sequentially, in "channel order".
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// If this turns out to be the case, you will need to arrange for the pulses to
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// wire up the channels in an order whereby the pulses alternatively alternately
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// between the two interrupts and adjust the channel order below.
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unsigned long channel_values[ NUM_CHANNELS ];
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if( Receiver::read_channels( channel_values ) )
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Testing::draw_receiver_channels( channel_values );
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// Motors::update_channels( channel_values );