thejerrytan / CG3002Rpi

CG3002 Raspberry Pi code

CG3002 Raspberry Pi code

System dependencies

python-dev, flite, vim, python-devel

Setup pip, virtualenv and virtualenvwrapper for Linux and OS X

1. pip install -U pip
2. pip install virtualenv
3. pip install virtualenvwrapper
4. Add this line to your .bash_profile: export WORKON_HOME=~/.virtualenvs
5. Add this line to your .bash_profile: source /usr/local/bin/virtualenvwrapper.sh
6. Create virtualenv: mkvirtualenv reborn
7. Install dependencies: pip install -r requirements.txt
8. To enter virtualenv: workon name-of-virtualenv
9. To exit virtualenv: deactivate

Instructions to get matplotlib working with virtualenv (for MAC OS X)

Reference: http://matplotlib.org/faq/virtualenv_faq.html

1. Copy the following to a file called fpython in the site-packages directory of your virtualenv (Normally its /Users/YOU/.virtualenvs/name-of-virtualenv/lib/python2.7/site-packages/bin)

#!/bin/bash
# what real Python executable to use
PYVER=2.7
PATHTOPYTHON=/usr/local/bin/
PYTHON=${PATHTOPYTHON}python${PYVER}

# find the root of the virtualenv, it should be the parent of the dir this script is in
ENV=`$PYTHON -c "import os; print(os.path.abspath(os.path.join(os.path.dirname(\"$0\"), '..')))"`

# now run Python with the virtualenv set as Python's HOME
export PYTHONHOME=$ENV
exec $PYTHON "$@"

Make sure that fpython is an executable, if not, sudo chmod +x fpython on the command line

2. Run framework python when running scripts that require matplotlib - fpython name_of_script.py

3. Running step_detection:

Connect arduino with IMU chip to serial port, find address of your serial port. Easiest way is to open arduino IDE, tools -> port, or another way is to go to /dev (for MAC users) and trial and error from all the file descriptors listed there

Open serial_input.py, change SERIAL to your own serial address and PIPE to your own local address, DO NOT COMMIT this change Open step_dectection.py, change PIPE to your own local address, DO NOT COMMIT this change

Open 2 terminal window - first: fpython step_dection.py (this is the master process, hence must run first) second: fpython serial_input.py

How to terminate: fpython will run forever and is not well behaved to CTRL-C signals from keyboard, surest way is to kill process from activity monitor or commmand line

2 files will be created in local folder - pid contains pid of the master process, so client can send signal interrupts to master, pipe is the named pipe created to transfer data between 2 processes

This is the arduino code for the IMU, please use this as the serial comms is sensitive to the data formatted here

#include <Wire.h>
#include <LSM303.h>

LSM303 compass;

void setup()
{
  Serial.begin(115400);
  Wire.begin();
  compass.init();
  compass.enableDefault();
}

void loop()
{
  compass.read();
  double x = (compass.a.x / 1600.0);
  double y = (compass.a.y / 1600.0);
  double z = (compass.a.z / 1600.0);
  Serial.print(x);
  Serial.print(",");
  Serial.print(y);
  Serial.print(",");
  Serial.print(z);
  Serial.println();

  delay(20);
}