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philpem / rp2040_sdlc.pio
Last active June 14, 2024 20:24
SDLC in Pi 2040 PIO
; This is a first pass attempt at making a Pi Zero PIO module handle zero-bit stuffing and flag transmission
; It will need cycle delays adding, etc. to turn it into usable code.
; I got half-way through it, then realised it wasn't going to work for my use case (NABU Adaptor packet generation) because
; the NABU Adaptor has a LFSR-based bitstream randomizer (scrambler) after the SDLC block.
;
; Set up autopull, and a bit length of 9 (if such a thing is possible, I haven't checked).
; The first bit shifted is a 0 for normal data, or a 1 for 'raw' sending, which is used to send flags (0x17E).
.program sdlc
.side_set 1
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philpem / arduino.md
Last active January 21, 2023 13:31
Arduino / Atmel AVR references
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philpem / hyperbolic.ipynb
Last active December 4, 2018 12:19
Hyperbolic radio navigation proofs
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philpem / rrcfilter.ipynb
Created October 19, 2018 14:36
Root raised cosine filter using SciPy
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philpem / si44xxClE.ipynb
Created October 19, 2018 13:15
Si44xx Class E matching (Jupyter notebook)
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philpem / keybase.md
Created March 3, 2016 00:18

Keybase proof

I hereby claim:

  • I am philpem on github.
  • I am philpem (https://keybase.io/philpem) on keybase.
  • I have a public key ASBkTwASXx0xo0kS4P1bKk8l5bz7sZGLHDr6hUxO87ytWwo

To claim this, I am signing this object: