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To facilitate communication between the embedded microcontrollers and the
host PC, a serial communications protocol was developed. The protocol
is relatively simple in design, but effective.
The protocol consists of three layers: physical, framing, and
application-specific. The physical layer relates to the actual medium
and means of transmission. Framing relates to encapsulation and
transmission/receipt of data packets. The application-specific layer
defines messages that specific applications use to communicate.
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