Skip to content

Latest commit

 

History

History
132 lines (82 loc) · 3.77 KB

README.md

File metadata and controls

132 lines (82 loc) · 3.77 KB
Raw

pi-DIO

Copyright, Ian Dobbie - [email protected] and David Pinto - [email protected] 2015

A basic pyro server to allow digital IO tp be perfromed from cockpit via a RaspberryPi. This uses the GPIO pins to flip 3.3V digital signals from the Pi. Original desing is for the Oxford DeepSIM instrument and this enables control of the light paths via Newport flip mirrors.

Pinouts found from http://raspberrypi.stackexchange.com/questions/12966/what-is-the-difference-between-board-and-bcm-for-gpio-pin-numbering where the current system is using a model B revision 2.0 (second image down on the page).

The cockpit side code is in devices/pi-DIO.py of https://github.com/MicronOxford/cockpit.

This code now runs the Adafruit MCP9808 temperature sensor over i2c but this requires some config.

1.Install smb and i2c tools on Pi, sudo apt-get install -y python-smbus i2c-tools 2.Install the adafruit MC9808 library, this required the python-dev packages as well. enable i2c using the raspi-config tool (in adavnced options) 3.add i2c-bcm2708 and i2c-dev to the /etc/modules file 4.reboot

#Instalation:

  1. Install python and the raspberryPI GPIO python tools. We did this by gettting a pretty standard raspbian install. I alos had to add python_daemon using apt-get. This has a couple of extra dependencies as well.

  2. copy the DIO_server script into init.d, edit to reflect where the code is on the system (currently /usr/local/pi_DIO)

  3. edit the RPi.conf to reflect the port and IP address of the system.

2b) Check permissions the init.d file and the DIO_server.py must have execute permissions.

  1. Edit DIO.py to reflect what signals are on which pin of the system, reference the diagram linked to above to work out which GPIO pin is where on the connector. This should be moved into config file.

  2. test to see it starts.

#Basic calling conventions:

DIO.flipDownUp(mirror, position)

position=True flips up, position=False flips down, the relevant mirror. Mirrors start at 0 (it is an index into GPIO_PINS array to say which pin to flip for which logical mirror.

DIO.get_temperature() returns an averaged temperature reading Averages are based on two variables readsPerUpdate and updatePeriod

Temperature is logged to a rotating log file.

#Brief summary of the config file format

As is the cockpit convention it has a section heading in this case it is "[rpi]"

ipAddress: is the current host ip address, needed as the system may have several IPs and we need to know what to listen on.

port: Port to list on. Current standard is 7768.

GPIO lines: list of lines to use, currently in order [17,27,22,10,9,11,5]

TEMP_SENSORS = list of the i2c temp sensors addresses default first on is [0x18]

#Installing on new Pi Instructions for pi-DIO onto a brand new Pi in micron

Grab latest raspian distribution and install

Install openvpn so we can get network access in department. Standard install process is

sudo apt install openvpn

Additional programs that are useful

*screen

Required installs with apt *git *python3-pip *python3-smbus

Required python isntalls with pip *sudo pip install Pyro4 *sudo pip install RPi.GPIO

Clone and install Adafruit python temp sensor library cd ~ git clone https://github.com/adafruit/Adafruit_Python_MCP9808.git cd Adafruit_Python_MCP9808/ sudo python setup.py install

Clone this package cd ~ git clone https://github.com/iandobbie/pi-DIO.git

Clone my TSYS01 code into the pi-DIO directory cd pi-DIO git clone https://github.com/iandobbie/TSYS01.py.git mv TSYS01.py TSYS01

create a logs directory mkdir logs

Edit the RPi.conf to refect your real configuration. Then test run with python DIO_server.py