New answers tagged atmega32u4
2
I imagine (haven't really tried it) this would work, with some minor adaptation to match your code structure.
// VBUS or counting frames
// Any frame counting?
u8 USBConnected()
{
u8 f = UDFNUML;
delay(3);
return f != UDFNUML;
}
The method reads the UDFNUML - usb data frame number lower (byte) register, waits 3 milliseconds, which would be ...
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