Teensyduino 1.47 has been released.

https://www.pjrc.com/teensy/td_download.html

1.47 is the first official release to support Teensy 4.0.


However, not all libraries and features are supported on Teensy 4.0 yet. Here is a partial list of things known to not yet work on Teensy 4.0.

OctoWS2811
WS2812Serial
PulsePosition
USB types other than Serial
Optimization with LTO
legacy AVR register emulation
FreqMeasureMulti
SdFat
Snooze
TeensyThreads
Wire slave (normal master mode works)

My hope is to release 1.48 in early September, with most of the items on this list supported.

If you encounter problems, please reply on this thread with details. Please include complete code and everything needed to reproduce the problem.