Mercurial > ~darius > hgwebdir.cgi > pyinst
view tek2024b_example.py @ 85:60ad91b4c67c default tip
Add 'quick' option to use a faster sweep time with no averaging.
Useful for testing the hardware is setup correctly without having to wait 3 minutes.
author | Daniel O'Connor <doconnor@gsoft.com.au> |
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date | Mon, 21 Oct 2024 14:12:50 +1030 |
parents | 91b476ebc0f2 |
children |
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#!/usr/bin/env python # Copyright (c) 2009 # Daniel O'Connor <darius@dons.net.au>. All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # 1. Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # # THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE # ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF # SUCH DAMAGE. # import matplotlib.pylab as pylab import numpy import scpi import time import usb488 def test(u): u.write("*IDN?") print("IDN reports " + u.read()) # Set data format to 16 bit big endian signed u.write("DATA:ENC RIB") u.write("DATA:WIDTH 2") # Turn channel 1 on u.write("SELECT:CH1 ON") # Set the curve source to channel 1 u.write("DATA:SOURCE CH1") # Fetch channel scale u.write("CH1:SCALE?") vscale = float(u.read(1).split()[1]) print("Channel 1 scale is %.2f volts/div" % (vscale)) # Fetch horizontal scale u.write("HOR:MAIN:SCALE?") hscale = scpi.getdata(u.read()) print("Horizontal scale is %f nsec/div" % (hscale * 1e9)) # Make sure the previous commands have been executed u.write("*WAI") # Fetch curve data (wait up to 1 second) since the read takes a little while u.write("CURVE?") then = time.time() result = u.read(1.0) now = time.time() print("CURVE read took %f milliseconds" % ((now - then) * 1000.0)) # Parse data ary = scpi.bindecode(result, dtype = numpy.dtype('>h')) # Convert to volts ary = ary / 32768.0 * vscale # Plot data pylab.plot(ary) pylab.show() if __name__ == "__main__": u = usb488.USB488Device() print("Found device") test(u)