The functions fast pin-I/O uses are currently missing, so don't define BUSIO_USE_FAST_PINIO. Also, we need typedef for BitOrder, but it refuses to compile without also including Arduino.h, at least under PlatformIO.
Testing for the define from build.board is not a good test (I recently updated them to refer to the specific part, instead of just the number of pins, for example) - instead, test for the MEGATINYCORE define, which is defined by Arduino.h and will always be there , and will be for all future versions of megaTinyCore. Also added a test for DxCore, which supports the new AVR Dx-series parts, and does SPI bit order in the same way. I confirmed that the examples now compile again on megaTinyCore with this change - and now compile for DxCore as well
As many (all?) ARM Cortex based chips, Infineon xmc boards also need
this quirk for BusIO to compile.
Original commit: 4921ca2cea ("Update Adafruit_SPIDevice.h")
XMC for arduino: https://github.com/Infineon/XMC-for-Arduino
WereCatf
Spence Konde (aka Dr. Azzy)
Robin Giese
Hans
lady ada
Roelof
Daniel Stuart
ElPercha
Ladyada
scott snyder