The line:
ISR (SPI_STC_vect)
generates the “expected constructor, destructor…” error on the Wio Terminal, and all other Seeed boards I tried. It works fine on lots of Arduino boards. I’ve also experimented with ISR for internal timers, and same thing - good on an Arduino Uno, but the same error on Seeeds.
Is this a <SPI.h> library issue, or is ISR not the right command for Seeed board internal interrupts?
Thanks!