For educational purposes, I would like to write my own i2c protocol. Is it possible to write a custom i2c library to communicate using regular ports, or should I use the SCL and SDA ports? Do the SCL/SDA ports have special hardware implementations, or can you configure any port for i2c?
Do the SCL/SDA ports have special hardware implementations
The microcontroller datasheet is useful for that sort of information.
Thank you for the answer.
Did you mean that I can use external FET to imitate internal transistor shown on the picture below?
What about the challenges of using the same pin for both input and output? I believe I can address this by using additional components such as comparators and transistors (and additional pins of course).
