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This document describes the process of running Klipper on a Beaglebone
PRU. The PRU support is experimental.
Building an OS image
====================
Start by installing the
[latest Jessie IoT](https://beagleboard.org/latest-images) image
(2017-03-19 or later). One may run the image from either a micro-SD
card or from builtin eMMC. If using the eMMC, install it to eMMC now
by following the instructions from the above link.
Then ssh into the beaglebone machine (ssh debian@beaglebone --
password is "temppwd") and install Klipper by running the following
commands:
```
git clone https://github.com/KevinOConnor/klipper
./klipper/scripts/install-beaglebone.sh
```
Install Octoprint
=================
One may then install Octoprint:
```
git clone https://github.com/foosel/OctoPrint.git
cd OctoPrint/
virtualenv venv
./venv/bin/python setup.py install
```
And setup OctoPrint to start at bootup:
```
sudo cp ~/OctoPrint/scripts/octoprint.init /etc/init.d/octoprint
sudo chmod +x /etc/init.d/octoprint
sudo cp ~/OctoPrint/scripts/octoprint.default /etc/default/octoprint
sudo update-rc.d octoprint defaults
```
It is necessary to modify OctoPrint's **/etc/default/octoprint**
configuration file. One must change the OCTOPRINT_USER user to
"debian", uncomment the BASEDIR, CONFIGFILE, and DAEMON settings and
change the references from "/home/pi/" to "/home/debian/":
```
sudo nano /etc/default/octoprint
```
Then start the Octoprint service:
```
sudo systemctl start octoprint
```
Make sure the octoprint web server is accessible - it should be at:
[http://beaglebone:5000/](http://beaglebone:5000/)
Building the micro-controller code
==================================
To compile the Klipper micro-controller code, start by configuring it
for the "Beaglebone PRU":
```
cd ~/klipper/
make menuconfig
```
To build and install the new micro-controller code, run:
```
sudo service klipper stop
make flash
sudo service klipper start
```
For the Replicape, it is also necessary to compile and install the
micro-controller code for a Linux host process. Run "make menuconfig"
a second time and configure it for a "Linux process":
```
make menuconfig
```
Then install this micro-controller code as well:
```
sudo service klipper stop
make flash
sudo service klipper start
```
Remaining configuration
=======================
Complete the installation by configuring Klipper and Octoprint
following the instructions in
[the main installation document](Installation.md#Configuring_Klipper).
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