changeset 16:c2c13d804fce

Rename examples, rework them to be clearer and use helper functions.
author Daniel O'Connor <darius@dons.net.au>
date Wed, 10 Aug 2011 12:51:07 +0930
parents 37d6ceb4850f
children 20df02be818a
files example.py example2.py rs_fsp7_example.py tek2024b_example.py
diffstat 4 files changed, 172 insertions(+), 119 deletions(-) [+]
line wrap: on
line diff
--- a/example.py	Wed Aug 10 12:50:37 2011 +0930
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,56 +0,0 @@
-#!/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 usb488
-import matplotlib.pylab as pylab
-import numpy
-import time
-
-def main():
-    u = usb488.USB488Device()
-    print "Found device"
-
-    u.write("*IDN?")
-    print "IDN reports " + 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
-    then = time.time()                            
-    result = u.read(1.0)	# Takes the CRO a while for this
-    now = time.time()
-    print "CURVE read took %f milliseconds" % ((now - then) * 1000.0)
-    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/example2.py	Wed Aug 10 12:50:37 2011 +0930
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,63 +0,0 @@
-#!/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 rsib
-import numpy
-from matplotlib import pylab
-    
-def test(r):
-    r.write('*IDN?')
-    print "ID is " + r.read(5)
-    r.write("*RST")
-    r.write("INIT:CONT OFF")
-    r.write("SYST:DISP:UPD ON")
-    r.write("FREQ:STAR 85MHz;STOP 125MHz")
-    r.write("DISP:WIND:TRAC:T:RLEV -20dBm")
-    r.write("INIT;*WAI")
-    r.write("*OPC?")
-    print "OPC - " + r.read(10)
-    r.write("CALC:MARK:PEXC 6DB")
-    r.write("CALC:MARK:FUNC:TOI ON")
-    r.write("CALC:MARK:FUNC:TOI:RES?")
-    print "Result " + r.read(10)
-
-    r.write("FORM:DATA ASC")
-    r.write("CALC:LIM5:NAME 'TEST1'")
-    r.write("CALC:LIM5:COMM 'Upper limit line'")
-    r.write("CALC1:LIM5:TRAC 2")
-    r.write("TRAC1? TRACE1")
-    data = r.read(10)
-    #print "Data - " + dat
-    data = map(float, data.split(','))
-    ary = numpy.array(data)
-    pylab.plot(ary)
-    pylab.show()
-    
-if __name__ == '__main__':
-    r = rsib.RSIBDevice('localhost')
-    test(r)
-    
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/rs_fsp7_example.py	Wed Aug 10 12:51:07 2011 +0930
@@ -0,0 +1,90 @@
+#!/usr/bin/env python
+
+# Copyright (c) 2011
+#      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 numpy
+from matplotlib import pylab
+import rsib
+import scpi
+
+def test(r):
+    # ID instrument
+    r.write('*IDN?')
+    print "ID is " + r.read(5)
+
+    # Reset to defaults
+    r.write("*RST")
+
+    # Set to single sweep mode
+    r.write("INIT:CONT OFF")
+
+    # Enable display updates
+    r.write("SYST:DISP:UPD ON")
+
+    # Set frequency range
+    r.write("FREQ:STAR 85MHz;STOP 125MHz")
+
+    # Set reference level
+    r.write("DISP:WIND:TRAC:Y:RLEV -20dBm")
+
+    # Trigger the sweep
+    r.write("INIT;*WAI")
+
+    # Wait up to 10 seconds for it to be done
+    r.write("*OPC?")
+    print "OPC - " + r.read(10)
+
+    # Set peak excursion
+    r.write("CALC:MARK:PEXC 6DB")
+    # Find 3rd order intercept & get result
+    r.write("CALC:MARK:FUNC:TOI ON")
+    r.write("CALC:MARK:FUNC:TOI:RES?")
+    print "Result " + r.read(10)
+
+    # Set data format
+    r.write("FORM REAL,32")
+    #r.write("FORM:DATA ASC")
+
+    # Set limit line
+    r.write("CALC:LIM5:NAME 'TEST1'")
+    r.write("CALC:LIM5:COMM 'Upper limit line'")
+    r.write("CALC1:LIM5:TRAC 2")
+
+    # Grab trace data
+    r.write("TRAC1? TRACE1")
+    data = r.read(10)
+    #print "Data - " + dat
+    #ary = ascdecode(data)
+    ary = bindecode(data)
+
+    # Plot data
+    pylab.plot(ary)
+    pylab.show()
+    
+if __name__ == '__main__':
+    r = rsib.RSIBDevice('analyzer')
+    test(r)
+    
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tek2024b_example.py	Wed Aug 10 12:51:07 2011 +0930
@@ -0,0 +1,82 @@
+#!/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 = float(u.read(1).split()[1])
+    print "Horizontal scale is %f sec/div" % (hscale)
+
+    # Make sure the previous commands have been executed
+    u.write("*WAI")
+
+    # Fetch curve data (wait up to 1 second)
+    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, header = ':CURVE ', 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)