Domain
Protocols
Wire-level communication protocols used between chips and boards. Each protocol is its own topic folder — SPI and I2C are never merged just because they're both "serial buses."
Topics
- SPI — Serial Peripheral Interfacewritten
- I2C — Inter-Integrated Circuitwritten
- UART — asynchronous serialwritten
- CAN — Controller Area Networkwritten
Planned
one-wire rs-485
Scope note
How Linux exposes these buses to userspace (spidev, i2c-dev, tty) is covered from the OS side in Linux → Drivers, and cross-linked from each protocol page.