Module ir 

Available on crate feature cgb only.

The Game Boy Color’s infrared port.

What the hardware offers is a lamp and a light sensor. There is no clock, no framing and nothing to say a message has arrived. Talking to anything means building all of that out of Port::led and Port::signal.

let Some(port) = ir::open() else { return };

port.led(true);

Sending

A receiver settles to whatever infrared is already in the room, so a lamp held on reads as nothing after a moment and a message has to be pulses. A Philips remote control, for one, sends a run of 32 flashes of 10 and 17.5 microseconds where a single one of 880 would say the same thing.

Nothing here counts those out. The lengths belong to whatever is on the other end, and double speed halves what a loop of a given length takes.

See https://gbdev.io/pandocs/CGB_Registers.html.

Structs

Port

The port, open and drawing current.

Functions

open

Open the port, if this machine has one.