Protocol specification
======================

Messages
--------

<open TCP session>
+[greeting]
-message

SPEC
+driver_spec
-message

RESET
+[comment]
-message

RESET_RF
+[comment]
-message

TEST
+[comment]
-message

SLP_TR 0|1
+[comment]
-message

CLKM freq_mhz
+[comment]
-message

SET register value
+[comment]
-message

GET register
+value
-message

WRITE length raw-data
+[comment]
-message

READ
+length raw-data
-message

SETRAM addr value
+[comment]
-message

GETRAM addr
+value
-message

POLL
+0|1
-message

WAIT
+0|1
-message


Message format
--------------

Commands are not case-sensitive. Messages and comments consist of printable
ASCII characters and spaces.

Whitespace separating words is always exactly one space character.
Lines end with a * single newline, without trailing whitespace.
Numeric values are in C notation, i.e., 64, 0100, and 0x40 would all
represent the same value.

"raw-data" is a string of binary data of the indicated length. The other
formatting conventions remain valid after this string, i.e., it must be
followed by a single newline.

The device is implicitly opened when establishing a TCP session. The
device is implicitly closed when closing the TCP session.


Asynchrous interrupt notification (not implemented yet)
---------------------------------

The WAIT command is not answered until an interrupt or another command is
received. WAIT returns the interrupt status, just like POLL.
