As many of my readers know, the Raspberry Pi is a $35 dollar ARM computer with 2 USB ports, and ethernet port, HDMI, and some GPIO pins. My current plan is to use the Raspberry Pi as my main development machine, flashing all of my ATMEGA328 chips from it. This will allow me to not only program anywhere, but should my computer crash, my development environment will be perfectly safe (provided that I keep it backed up). This 700 MHz computer is pretty dinky, when I first ran the GUI several months ago, all I saw was how unreliable it was and that it would be impossible to get anything done on it.
Since then I purchased a high speed SD card from a quality manufacturer, and the performance is better. I also learned that you can divide the memory between the GPU and the general purpose memory. For my case, I decided to skip the monitor and keyboard, and SSH into it using KiTTY (an updated PuTTY client). I’m also using Xming to serve as a X11 Server on my windows system, so that I can do X11 forwarding of the Arduino IDE if needed. I hope to use the command line version, arduino-mk, but currently it doesn’t work as well as the Arduino IDE does.
I also discovered that many of my existing programs no longer work on the latest Arduino IDE v 1.0.1, because the avr-gcc team changed some things around. Luckily I have a backup of my old development environment, as well as a working VM with it on it, but my current plan is to update my existing code as needed, to work with the new versions, since they are the future.
Here’s a brief rundown of what I needed to setup on the Raspberry Pi to get it to work:
- Install the latest Rasbian onto your SD card following these instructions. I followed the Easy Way.
- I then connected the Raspberry Pi, SD, Ethernet, and power (from a reliable charger, I’m using a HP Touchpad USB charger). You’ll need to find the IP of the raspberry pi by checking your router for newly connected devices. Use KiTTY to SSH into it (using the IP and port 22). Username / password is pi / raspberry.
- Go ahead and update things (sudo apt-get update, sudo apt-get upgrade). I install vim, tmux, arduino and python-serial as well. I also copy a folder I made a while ago that has all of my vim, screen, and tmux settings.
- To get my usb-serial devices working, I need to update to the latest raspberry pi kernel. To do this, we need to install rpi-update. With that installed, update the kernel. As of this writing, the latest kernel is “Linux raspberrypi 3.6.11+ #414 PREEMPT”,
- Now you should be able to use LScreamer or Arduino to flash your projects!
What’s great about this setup, is that I can SSH into the raspberry pi from anywhere (provided I have opened up the right ports in my router). Yesterday at my brother’s house I was connected to my Raspberry Pi on my workbench, trying to get an Arduino program to compile. As I work on my latest project, I may implement some improvements to this Raspberry Pi setup, possibly automatically controlling my Oscilloscope and my power supply.
I find taking little steps to big goals gives you small accomplishments that build up, giving you that much more motivation to finish.