I try to use SPI on Teensy 4.0. I installed the library SPI-master from github, but I get error messages when compiling:
C:\Users\Koch\AppData\Local\Temp\arduino_build_47759\sketch\SPI_Test.ino.cpp.o: In function `setup':
C:\Users\Koch\Documents\Arduino\Teensy\SPI_Test/SPI_Test.ino:31...