make <keyboard>:<keymap>:avrdude
+or if you want to flash multiple boards, use the following command
+
+ make <keyboard>:<keymap>:avrdude-loop
+
+When you're done flashing boards, you'll need to hit Ctrl + C or whatever the correct keystroke is for your operating system to break the loop.
+
## Halfkay
Halfkay is a super-slim protocol developed by PJRC that uses HID, and come on all Teensys (namely the 2.0).