LPBB(4)

📦 version 15.1, in freebsd 14.5, freebsd 15.1, nixpkgs unstable

🦋 LPBB(4) — Kernel Interfaces Manual 🦋

okay bestie 💖 welcome to the <pink>lpbb</pink> page, aka the parallel port I2C bit-banging interface. it’s giving vintage hardware realness and we’re gonna read it together, no cap. ✨

✨ NAME ✨

lpbb — parallel port I2C bit-banging interface

🎀 SYNOPSIS 🎀

device iicbus
device iicbb

device lpbb
device iic

these are the config lines, exactly as written, fr fr. 🫶

🌸 DESCRIPTION 🌸

okay so the <pink>lpbb</pink> driver supports the Philips official I2C parallel bit-banging interface. that’s the whole flex. 💅

and here’s the iconic schematic + part list, preserved character-for-character — no remix, no edits, no cap: 🎀

                                                LS05 pin 14 (Vcc) o      -------
                                                                  |      |     |
                   +--+--+---------------------+--+--+------------+------+-o 1 |
                   |  |  |                     |  |  |           ===.1uF | +5V |
         -------- [R][R][R] 3x10K       3x10K [R][R][R]   LS05    |      |     |
         |      |  |  |  |                     |  |  |    pin 7 o-+------+-o 2 |
         | 12 o-+--+  |  |   3|\ 4             |  |  |    (Gnd)          | GND |
         | 17 o-+-----|--|----| >o-------------+--|--|--------------+    |     |
         |      |     |  |    |/        8 /|9     |  |     10 /|11  +----+-o 3 |
         | 15 o-+-----+--|--------------o< |------+--|------o< |----+    | SCL |
         |      |        |   1|\ 2        \|         |        \|         |     |
         |  9 o-+--------|----| >o-------------------+--------------+----+-o 4 |
         |      |        |    |/                            6 /|5   |    | SDA |
         | 11 o-+--------+----------------------------------o< |----+    -------
         | 10 o-+-+                                           \|          4-pin
         | 13 o-+-+--oGND                                              Connector
         | 25 o-+-+      ------------------ Part List --------------------------
         --------        | 1 - .1 uF capacitor   | 6 - 10K 5% resistors        |
         25-pin male D   | 1 - 4-pin connector   | 1 - 25-pin male D connector |
         connector to PC | 1 - 74LS05 open collector hex inverter              |
         printer port    -------------------------------------------------------

🔥 SEE ALSO 🔥

go give these pages a little kiss for me 😭💖

🫶 HISTORY 🫶

The lpbb manual page first appeared in FreeBSD 3.0. 👑

👑 AUTHORS 👑

This manual page was written by Nicolas Souchu. 🫶

xoxo, Debian 💋 October 25, 1998 🎀

📦 where this page comes from