MATLAB: Simulink arduino library missing analog input as digital output block

Question

Hi,

I need to use Arduino analog input pins A2 and A3 as digital output, which is possible in Uno (https://www.arduino.cc/reference/en/language/functions/digital-io/digitalwrite/). This is so that I could accommodate the MCP4725 DAC breakout board https://learn.sparkfun.com/tutorials/mcp4725-digital-to-analog-converter-hookup-guide. However, the Simulink Arduino library only has digital output block for digital pins. Please advise. Thanks.

Answer 1

As of 2019b, the digital output block can only handle the digital output pins (D0-D13). Any value greater than 13, representing A0-A5, throws an error during build.

The analog pins A0-A5 are however accessible via MATLAB.

a = arduino();
writeDigitalPin(a, 'A0', 1);