Arduino Sketch for designs based on the I2C 24-bit digital expander IC Texas Instruments TCA6424A. Implemented and tested on a PMOD2RPI interface board with a Seeeduino XIAO (Cortex M0+) and a I2C24IO PMOD module.
Running the sketch will output various LED patterns that indicate the IO signal status:
- ON/OFF for all pins on the module
- Moving a single bit through each of the 24 pins
- Moving 3 bits, one for each of the 3 output ports
- Increment pins from 0 until all port pins are ON/OFF
- Moving 6 bits, two for each of the 3 output ports
- Alternate the level for neighporing pins ON/OFF
