Developing an I2C Driver for QNX

An Inter-Integrated Circuit (I2C) is a serial communication protocol designed for low-speed, short-distance communication between integrated circuits on a board. The I2C bus requires only two lines: SDA (Serial Data Line) and SCL (Serial Clock Line). The SDA line carries the data between the master and slave devices, while the SCL line provides the clock signal used to synchronize this data transmission. Communication occurs by toggling the voltage levels on the SDA line between low and high states, which represent binary data. These transitions are timed according to the clock signal on the SCL line, allowing the receiving device to interpret the data as a synchronized stream of bits. This simplicity makes I2C ideal for connecting multiple low-speed peripherals over a shared bus with minimal wiring.