A module to control Vialux DMDs based on ALP4.X API.It uses the .ddl files provided by Vialux.
ALP4lib is a Python module to control Vialux DMDs based on ALP4.X API. This is not an independant open source module, it uses the .ddl files provided by Vialux. This software is still experimental, use it at your own risk.
What is it?
This module wraps the basic function of the Vialux dlls to control a digitial micro-mirror device with a Vialux board. Vialux provides dlls and also modules for Matlab and Labview but not for Python. This code is tested with a device using the 4.3 version of the ALP API, other versions may have issues. LED control related functions are not implemented. Please read the ALP API description provided with the Vialux ALP installation.
- Windows 32 or 64,
- Vialux drivers and the ALP4.X dll files available for download on Vialux website.
Just copy the ALP4.py file in the working directory.
To automatically download and copy the module in the python directory (so it can be available from anywhere), run the command:
pip install ALP4lib
Copy the .dll
The win32 ALPX.dll files should be directly in the working directory and the win64 dll with the same name in a /x64 subfolder. Alternatively, a different dll directory can be set at the initialization of the DMD handler object. The dlls have the following names respectively for the 4.1, 4.2 and 4.3 versions of the ALP API: ‘alp41.dll’, ‘alp42.dll’ and ‘alp4395.dll’.
A simple example
import numpy as np from ALP4 import * import time # Load the Vialux .dll DMD = ALP4(version = '4.3', libDir = 'C:/Program Files/ALP-4.3/ALP-4.3 API') # Initialize the device DMD.Initialize() # Binary amplitude image (0 or 1) bitDepth = 1 imgBlack = np.zeros([DMD.nSizeY,DMD.nSizeX]) imgWhite = np.ones([DMD.nSizeY,DMD.nSizeX])*(2**8-1) imgSeq = np.concatenate([imgBlack.ravel(),imgWhite.ravel()]) # Allocate the onboard memory for the image sequence DMD.SeqAlloc(nbImg = 2, bitDepth = bitDepth) # Send the image sequence as a 1D list/array/numpy array DMD.SeqPut(imgData = imgSeq) # Set image rate to 50 Hz DMD.SetTiming(illuminationTime = 20000) # Run the sequence in an infinite loop DMD.Run() time.sleep(10) # Stop the sequence display DMD.Halt() # Free the sequence from the onboard memory DMD.FreeSeq() # De-allocate the device DMD.Free()
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