Data link for use with components of remote control vehicles
Electronic components that are operable within remote control vehicles include Electronic Speed Controllers, radio control receivers, and telemetry transmitters. Hardware and software are described that support communication between a user computer and electronic components. A data link device has analog input and output interfaces that communicate to a mobile computing device such as smartphone. The data link device communicates with an electronic component to send and receive data such as parameters or operational data over a wired bidirectional bus interface. Software for performing data link operations run for example on an electronic component, a mobile computing device, a smartphone, a data link device, or a telemetry receive radio, or a combination of the above.
1. An apparatus for supporting communication between a mobile computing device and an electronic component operable within a remote control vehicle, said apparatus comprising:
a first analog input interface coupleable to a first analog output of a mobile computing device;
a first analog output interface coupleable to a first analog input of said mobile computing device;
a bidirectional wired bus interface coupleable to an electronic component, wherein said electronic component is operable within a remote control vehicle;
a wired cable coupled to said first analog input interface and to said first analog output interface, wherein said wired cable terminates in at least one audio jack connector comprising a tip, a ring, and a sleeve; and
a microprocessor coupled to said first analog input interface, said first analog output interface, and said bidirectional wired bus interface, wherein said microprocessor is configured in a first mode to:
(A) decode a first set of digital symbols received from said first analog input interface, thereby resulting in first digital data that includes parameters associated with said electronic component;
(B) store said first digital data,
(C) encode said first digital data in a format compatible with said bidirectional wired bus interface,
(D) decode information received from said bidirectional wired bus interface to produce second digital data, and
(E) encode a second set of digital symbols representing said second digital data for transmission on said first analog output interface.
2. The apparatus of claim 1 , wherein said bidirectional wired bus interface comprises a single bidirectional data path, and wherein said microprocessor is configured to arbitrate data flow on said single bidirectional data path.
3. The apparatus of claim 2 , wherein said microprocessor is configured to place said single bidirectional data path in a high impedance state when said microprocessor is not encoding data on said single bidirectional data path.
4. The apparatus of claim 1 , wherein said electronic component is coupled through a cable to said bidirectional wired bus interface, wherein said electronic component is an electronic speed controller coupleable to a battery and a motor, and wherein said electronic speed controller comprises a microprocessor configured to apply power received from the battery to said motor by controlling timing and duration of voltage pulses provided to said motor.
5. The apparatus of claim 1 , wherein said first analog input interface comprises a comparator configured to compare a voltage derived from said first analog output of said mobile computing device to a reference and to provide the result of said comparison to said microprocessor, and wherein said microprocessor and said comparator are comprised within the same integrated circuit.
6. The apparatus of claim 5 , wherein said comparator is configured to have a high amount of hysteresis.
7. The apparatus of claim 1 , further comprising a second analog input interface coupleable to a second analog output of said mobile computing device.
8. The apparatus of claim 1 , wherein said electronic component is one of a telemetry transmitter, a telemetry receiver, a hobby control receiver, a hobby alarm transmitter, and a hobby alarm receiver.
9. The apparatus of claim 1 , wherein said parameters associated with said electronic component comprise at least one of an alarm setting, a control setting, an operational variable setting, and firmware data.
10. The apparatus of claim 1 , wherein said information comprises data associated with said electronic component, and wherein said information comprises at least one of a current alarm setting, a current operational variable setting, data log values, an alarm, an operational measurement, and an operational statistic.
11. The apparatus of claim 1 , wherein said first digital data comprises a control setting, and wherein said format compatible with said bidirectional wired bus interface is a pulse width modulation format.
12. The apparatus of claim 1 , wherein said information received from said bidirectional wired bus interface is decoded using a pulse position measurement technique.