Mercurial > ~darius > hgwebdir.cgi > pyinst
changeset 3:62ffab79227e
Add example.py with pylab plotting example.
Tested with the Tek 2024B.
author | Daniel O'Connor <darius@dons.net.au> |
---|---|
date | Wed, 13 May 2009 17:08:41 +0930 |
parents | adaff1c4fd6b |
children | 6b360c30eed6 |
files | example.py usb488.py |
diffstat | 2 files changed, 31 insertions(+), 10 deletions(-) [+] |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/example.py Wed May 13 17:08:41 2009 +0930 @@ -0,0 +1,31 @@ +#!/usr/bin/env python + +import usb488 +import matplotlib.pylab as pylab +import numpy +import time + +def main(): + u = usb488.USB488Device() + print "Found device" + + u.write("*IDN?") + print "ID is..", + print u.read() + + u.write("DATA:ENC RIB") # Big endian signed + u.write("DATA:WIDTH 2") # 2 bytes wide + u.write("SELECT:CH1 ON") # Turn channel 1 on + u.write("DATA:SOURCE CH1") # Set the curve source to channel 1 + u.write("CURVE?") # Ask for the curve data + time.sleep(1) # Wait for the data.. + # XXX: need some way of polling + result = u.read() + data = result[13:] # Chop off the header + dattype = numpy.dtype('>h') # Big endian 16 bit quantity + ary = numpy.fromstring(data, dtype = dattype) + pylab.plot(ary) + pylab.show() + +if __name__ == "__main__": + main()
--- a/usb488.py Wed May 13 15:26:42 2009 +0930 +++ b/usb488.py Wed May 13 17:08:41 2009 +0930 @@ -251,14 +251,4 @@ result = result[0:-1] return result -def main(): - u = USB488Device() - print "Found device" - - print "ID is.." - u.write("*IDN?") - print u.read() -if __name__ == "__main__": - main() -