Raspberry PI Network

## Raspberry PI as Arduino network programmer ##


This guide will show you how to program an Arduino connected to your Raspberry PI from  the Arduino IDE on your local computer.
Linux and OS X for now

###On your Raspberry PI

First install avrdude

    apt-get install avrdude

Install avrdude-rpi using the installation tips from https://github.com/deanmao/avrdude-rpi they boil down to this:

	wget https://raw.githubusercontent.com/deanmao/avrdude-rpi/master/autoreset
	wget https://raw.githubusercontent.com/deanmao/avrdude-rpi/master/avrdude-autoreset
	sudo cp autoreset /usr/bin
	sudo cp avrdude-autoreset /usr/bin
	sudo mv /usr/bin/avrdude /usr/bin/avrdude-original
	sudo ln -s /usr/bin/avrdude-autoreset /usr/bin/avrdude

Next open the file /usr/bin/autoreset and change the reset pin to the pin you connected the Arduino reset to.
The GPIO pin number corresponds to the number of the pin of the header.

    vim /usr/bin/autoreset
 
###On your computer

Download and install Arduino IDE
go to the folder containing avrdude
On OS X this most likely is /Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin

    cd /Applications/Arduino.app/Contents/Resources/Java/hardware/tools/avr/bin
    mv avrdude avrdude-original
	wget https://gist.githubusercontent.com/erikkallen/11153072/raw/3e1cdfdef6aee12b9f0f47b50bc33849612f2a0d/avrdude
	chmod +x avrdude

VXI11 Ruby

## VXI11 Ruby

When working with electronics there is a big chance you need a test setup, This setup often contains big and expensive products like oscilloscopes and signal generators.
If your lab has big and expensive devices like this, chances are high that they can be controlled using the VXI11 protocol.

So the generic way of doing this is using windows download the drivers for the device, install something like Labview pay someone a large amount of money and your good to go.

But what if you don't like windows or paying a large amount of money, and you happen to have some ruby skills.
Well that's where the VXI11 gem comes in handy.

So how do you use it?

    # First require the gem
    require 'vxi11'
    # Create an instance of the VXI11 class
    v = VXI11.new
    # Search for devices
    v.find_devices
    # Connect to a found device
    v.connect "10.0.0.1"
    # Send the commands
    puts v.send_and_receive "*IDN?"
    
The example above is for getting the identification of a vxi11 device and should be implmented on any vxi11 capable device.
The other commands should be in the manual specific to your device.

So that's it for now.