檢視 Teensy 4.0 的原始碼

== IDE installation ==
# Download & Extract Arduino
# Install udev Rules
## The udev rule file gives non-root users permission to use the Teensy devices (serial, HID, etc). More Linux tips below.

sudo cp 49-teensy.rules /etc/udev/rules.d/

== SDIO 4 bit ==
[[File:Teensy_4_sdio_4_bit.JPG|500px|SDIO4 bit mode]]
# Format SD before running 
# Change pin define
## SD.begin(BUILTIN_SDCARD)