An half duplex serial port driver. The code has been fully optimized with a super simple spin interface for maximum speed and is also fully commented.

Provides full support for:

Receiving bytes,
Receiving words,
Receiving longs,
Receiving strings,

Transmitting bytes,
Transmitting words,
Transmitting longs,
Transmitting strings,

Baud Rate from 1 BPS to 19,200 BPS - Half Duplex.