2019-04-28 15:11:06 +00:00
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# encdec8b10b
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Encode and decode 8B10B encoding
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## Usage
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### Encode Data Byte
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```
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from encdec8b10b import EncDec8B10B
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running_disp = 0
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byte_to_enc = 0xf
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running_disp, encoded = EncDec8B10B.enc_8b10b(byte_to_enc, running_disp)
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print(hex(encoded))
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0xba
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```
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### Encode Control Byte
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```
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from encdec8b10b import EncDec8B10B
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running_disp = 0
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byte_to_enc = 0xbc # comma
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ctrl = 1
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running_disp, encoded = EncDec8B10B.enc_8b10b(byte_to_enc, running_disp, ctrl)
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print(hex(encoded))
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0x17c
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```
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### Decode Data Byte
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```
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from encdec8b10b import EncDec8B10B
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byte_to_dec = 0xba
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ctrl, decoded = EncDec8B10B.dec_8b10b(byte_to_dec)
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print(hex(decoded))
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0xf
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# ctrl variable confirm that it was a data byte
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print(ctrl)
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0
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```
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### Decode Control Byte
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```
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from encdec8b10b import EncDec8B10B
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byte_to_dec = 0x17c # comma encoded
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ctrl, decoded = EncDec8B10B.dec_8b10b(byte_to_dec)
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print(hex(decoded))
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0xbc
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# ctrl variable confirm that it was a control byte
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print(ctrl)
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1
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```
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### Verbosity
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Both functions have a verbose-mode to make it easier to confirm everything that's happening:
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```
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from encdec8b10b import EncDec8B10B
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running_disp = 0
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byte_to_enc = 0xA0
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running_disp, encoded = EncDec8B10B.enc_8b10b(byte_to_enc, running_disp, verbose=True)
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Encoder - In: A0 - Encoded: 146 - Running Disparity: 0
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ctrl, decoded = EncDec8B10B.dec_8b10b(encoded, verbose=True)
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Decoded: A0 - Control: 0
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```
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## 8B10B
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8B10B Encoding were implemented by Al Widmer and Peter Franaszek in 1983. It is still widely used in high-speed electronics.
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- [Original article](https://ieeexplore.ieee.org/document/5390392)
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- [Wikipedia](https://en.wikipedia.org/wiki/8b/10b_encoding)
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### Thanks
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- [Ryu Shinhyung](https://opencores.org/projects/async_8b10b_encoder_decoder) for creating the tables used in this module
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- [Chuck Benz](http://asics.chuckbenz.com/) for creating awesome combinatorial 8B10B modules
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- [Alex Forencich](http://www.alexforencich.com/wiki/en/scripts/matlab/enc8b10b) for his 8B10B Matlab script
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