Tag: MUX

MCP23017 Interrupts, Redux.

Posted on August 24, 2017

When testing a library, especially your own, it helps to complete the entire circuit board first. I found that: 1. I didn’t run a line from either of the MCP interrupt pins to either of the AVR interrupt pins 2. I didn’t connect ANY of the 8 I/O pins on the MCP port B to […]

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