SFP Uart Board

This firmware works for the SFP-UART board using a rp2040 as a usb->uart and i2c bridge. This works in tandem with the hardware to allow interfacing with various SFP modules that expose UART over non-standard pins. Due to limitations in drivers for both windows and linux in regards composite devices a different approach was taken for i2c. For I2C a hid interface was established that using a custom hid report, limitations in HID reports limits the size of the report preventing reading entire eeprom addresses at once. With limitation in mind an arbitrary 32 byte return was select.

A second CDC interface is provided as a debugging interface as required.

Large portions of this code were sourced from https://github.com/Nicolai-Electronics/rp2040-i2c-interface and https://github.com/Noltari/pico-uart-bridge

Disclaimer

This software is provided without warranty, according to the MIT License, and should therefore not be used where it may endanger life, financial stakes, or cause discomfort and inconvenience to others.

Raspberry Pi Pico Pinout