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# Build Instructions for Teensy 3.1
Currently the Teensy 3.1 port of MicroPython builds under Linux and not under Windows.
The tool chain required for the build can be found at <>.
Download the current Linux *.tar.bz2 file. Instructions regarding unpacking the file and moving it to the correct location
as well as adding the extracted folders to the enviroment variable can be found at
In order to download the firmware image to the teensy, you'll need to use the
downloader included with TeensyDuino. The following assumes that you have
TeensyDuino installed and set the ARDUINO environment variable pointing to the
where Arduino with TeensyDuino is installed.
cd teensy
ARDUINO=~/arduino-1.0.5 make
To upload micropython to the Teensy 3.1.
Press the Program button on the Teensy 3.1
sudo ARDUINO=~/arduino-1.0.5/ make deploy
Currently, the Python prompt is through the USB serial interface, i.e.
minicom -D /dev/ttyACM0
### Install 49-teensy.rules into /etc/udev/rules.d
If you install the 49-teensy.rules file from
into your ```/etc/udev/rules.d``` folder then you won't need to use sudo:
sudo cp ~/Downloads/49-teensy.rules /etc/udev/rules.d
sudo udevadm control --reload-rules
Unplug and replug the teensy board, and then you can use: ```ARDUINO=~/arduino-1.0.5/ make deploy```
### Create a GNUmakefile to hold your ARDUINO setting.
Create a file call GNUmakefile (note the lowercase m) in the teensy folder
with the following contents:
$(info Executing GNUmakefile)
include Makefile
GNUmakefile is not checked into the source code control system, so it will
retain your settings when updating your source tree. You can also add
additional Makefile customizations this way.