Would like it to work on Seeed XIAO SAMD 21G18 processor

[mcbpalisade]

I tried to use this lovely package on one of Seeed Studio's "XIAO" postage stamp processors. It compiles fine, but I see no output. This chip does have a DAC and I see DAC handling in the conditional complation but can't follow it since I don't know what compiler directives are active. This is also a 48 MHz chip. If you use it with Seeed's expansion board you get no output on the piezo buzzer on pin 3. Scoping all pins that are exposed (there aren't many) shows nothing.

I'm at wits end as far as adding compiler #error output messages to figure out what the code is trying to do and where.

Thank you