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• cgrlib
  • Installation
    • For Windows with Cygwin

cgrlib

cgrlib provides functions for taking data with the CGR-101 USB oscilloscope from Syscomp Electronic Design.

Installation

For Windows with Cygwin

1. Download the Cygwin installer

   Download the appropriate version of setup.exe from cygwin.com. I like to copy it to my Windows desktop so I can easily run it again when I need to add packages.

2. Run the installer, selecting install from internet

   I like to install the root directory to C:\cygwin for all users. I also like to store package information to C:\cygstore, but this doesn't really matter. After selecting file locations, you can use the Cygwin mirrors site to choose a mirror near you.

3. Install the default packages, plus the following:

   1. gnuplot
   2. python (2.7 branch)

   3. python-numpy

      This along with lapack and liblapack-devel really should be pulled in with cgrlib's installation script, but there are some problems with dependencies that make this hard right now.

   4. lapack

   5. liblapack-devel

   6. xorg-server

      We need to set up the X server to display waveforms with gnuplot.

   7. xinit

   8. xorg-docs

4. Start the Cygwin Terminal

   This creates your home directory and some useful configuration files.

5. Create a .startxwinrc file

   This is what you can use to start various X applications when the server starts. If you, like me, don't want to start any, a simple touch .startxwinrc from your home directory will suffice.

6. Edit your .bashrc file to set your DISPLAY variable

   echo 'export DISPLAY=:0' >> ~/.bashrc will keep gnuplot from complaining that it can't open the display. You'll need to restart your shell or re-read the rc file after adding the line. I like just typing bash to do this.

7. Install pip

   1. Download get-pip.py from pip. I like to save it to C:\cygwin\usr\.
   2. Run the installer with python get-pip.py.

8. Repair numpy

   I copied these instructions from centilemma.com. There's a lot of good information there.

   • cp /usr/lib/lapack/cygblas-0.dll /usr/bin
   • cp /usr/lib/lapack/cyglapack-0.dll /usr/bin

9. Install gnuplot-py

   This should be handled by setup.py, but I don't know how to specify allowing external and unverified packages.

   • pip install --allow-external gnuplot-py --allow-unverified gnuplot-py gnuplot-py

10. Finally, install cgrlib

    • pip install cgrlib

11. Start X using startxwin

12. Try capturing a waveform with the cgr-capture command.