DD series: Error in digitalPinToAnalogInput macro in pins_arduino.h

[nurazur]

When using the bootloader, the MVIO Fuse is evaluated as:
#define IS_MVIO_ENABLED() ((FUSE.SYSCFG1 & 0x01) == 0)
However the bits defining MVIO in FUSE.SYSCFG1 are bits 3 and 4, where bit 4 is 0 in case MVIO is set for dual supply configuration, and 1 when set to single supply configuration.
so the correct MVIO evaluation macro is this:
#define IS_MVIO_ENABLED() ((FUSE.SYSCFG1 & 0x10) == 0)

Tested for AVR64DD28 and AVR64DD32. The error is also in AVR64DD20 and AVR64DD14 pin definitions, but I can't test it because I do not have such parts available.

[WestfW]

Should probably be:

#define IS_MVIO_ENABLED() ((FUSE.SYSCFG1 & MVSYSCFG_SINGLE_gc) == 0)

Or even

#define IS_MVIO_ENABLED() ((FUSE.SYSCFG1 & FUSE_MVSYSCFG_gm) == MVSYSCFG_DUAL_gc)

[nurazur]

Because I do not want to touch the DxCore core files, here is a workaround that works for me:

In each file of the project where the ADC is used,
add these lines on top of the file:

#ifdef  IS_MVIO_ENABLED
#undef  IS_MVIO_ENABLED
#define IS_MVIO_ENABLED() ((FUSE.SYSCFG1 & FUSE_MVSYSCFG_gm) == MVSYSCFG_DUAL_gc)
#endif

[SpenceKonde]

This issue has been fixed in github.