PyLibNI845x provides a Python package ni845x that wraps the NI-845x driver software for Python using cython. Currently only the basic I2C is implemented, you are welcomed to add to the code (the basic SPI and advanced interfaces)
The package has been tested successfully with NI-845x software version 1.1 and 2.0 on windows XP.
To install cyipopt you will need the following prerequisites:
- python 2.6+
- numpy
- cython
- C++ compiler
Python(x,y) (http://code.google.com/p/pythonxy/) is a great way to get all of these if you are satisfied with 32bit. You will also need the drivers of the NI USB-4851 interface (http://sine.ni.com/nips/cds/view/p/lang/en/nid/202368). Download the source files of PyLibNI845x and update 'setup.py' to point to the header and lib files of the NI-845x driver software. Then, execute 'python setup.py install' from the command line.
The ni845x Python package provides a single class: device Here follows an example how to get the list of available devices:
> from ni845x import device
> dev = device()
> print dev.devices
To open a handle to the first available device:
> from ni845x import device
> dev = device()
> dev.open()
Basic I2C transactions:
> from ni845x import device
> dev = device()
> dev.open()
> dev.I2cConfig(address=0xA)
> dev.I2cWrite('hello world')
> read_data = dev.I2cRead(10)
> read_data = dev.I2cWriteRead('hello world again', 20)
Thank-you to the people at http://wingware.com/ for their policy of free licenses for non-commercial open source developers.
