Implement a secure ICS protocol targeting LoRa Node151 microcontroller for controlling irrigation.

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encdec8b10b

Encode and decode 8B10B encoding

Get

python3 -m pip install encdec8b10b

Usage

Encode Data Byte

from encdec8b10b import EncDec8B10B

running_disp = 0
byte_to_enc = 0xf
running_disp, encoded = EncDec8B10B.enc_8b10b(byte_to_enc, running_disp)
print(hex(encoded))
Output >> 0xba

Encode Control Byte

from encdec8b10b import EncDec8B10B

running_disp = 0
byte_to_enc = 0xbc # comma
ctrl = 1
running_disp, encoded = EncDec8B10B.enc_8b10b(byte_to_enc, running_disp, ctrl)
print(hex(encoded))
Output >> 0x17c

Decode Data Byte

from encdec8b10b import EncDec8B10B

byte_to_dec = 0xba
ctrl, decoded = EncDec8B10B.dec_8b10b(byte_to_dec)
print(hex(decoded))
Output >> 0xf
# ctrl variable confirm that it was a data byte
print(ctrl)
Output >> 0

Decode Control Byte

from encdec8b10b import EncDec8B10B

byte_to_dec = 0x17c # comma encoded
ctrl, decoded = EncDec8B10B.dec_8b10b(byte_to_dec)
print(hex(decoded))
Output >> 0xbc
# ctrl variable confirm that it was a control byte
print(ctrl)
Output >> 1

Verbosity

Both functions have a verbose-mode to make it easier to confirm everything that’s happening:

from encdec8b10b import EncDec8B10B

running_disp = 0
byte_to_enc = 0xA0
running_disp, encoded = EncDec8B10B.enc_8b10b(byte_to_enc, running_disp, verbose=True)

Output >> Encoder - In: A0 - Encoded: 146 - Running Disparity: 0

ctrl, decoded = EncDec8B10B.dec_8b10b(encoded, verbose=True)

Output >> Decoded: A0 - Control: 0

8B10B

8B10B Encoding were implemented by Al Widmer and Peter Franaszek in 1983. It is still widely used in high-speed electronics.

Thanks

Ryu Shinhyung for creating the tables used in this module
Chuck Benz for creating awesome combinational 8B10B modules
Alex Forencich for his 8B10B Matlab script

2.2 KiB Czysty Wina Historia