added converter script from csv to keysight/agilent 81150A waveform binary

diff --git a/keysight_agilent_81150A/example.csv b/keysight_agilent_81150A/example.csv
new file mode 100644 (file)
index 0000000..fa29c2e
--- /dev/null
+++ b/keysight_agilent_81150A/example.csv
@@ -0,0 +1,50 @@
+0.000000000000000000e+00,0.000000000000000000e+00
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diff --git a/keysight_agilent_81150A/keysight_convert.py b/keysight_agilent_81150A/keysight_convert.py
new file mode 100755 (executable)
index 0000000..c93e592
--- /dev/null
+++ b/keysight_agilent_81150A/keysight_convert.py
@@ -0,0 +1,116 @@
+#!/usr/bin/env python
+"""keysight_convert.py v0.1 (written in python 2.7)
+
+convert csv files to keysight/agilent 81150A binary waveforms
+x values have to be floats between 0 and 1 (first point should start with x=0)
+y values have to be floats between -1 and +1
+
+if --normalize flag is on, input waveform will be automatically fit into the allowed value range
+
+csv format:
+
+<xval1>,<yval1>
+<xval2>,<yval2>
+<xval3>,<yval3>
+...
+
+example:
+
+./keysight_convert.py example.csv
+
+2016 by Michael Wiebusch
+http://mwiebusch.de
+"""
+import numpy as np
+from matplotlib import pyplot as plt
+import argparse
+import re
+
+
+#small helper fuction for little endian/big endian conversion stuff
+def flip(num):
+  return bytearray([num & 0xFF,(num & 0xFF00)>>8])
+
+#def normalize(vec):
+  #vec=vec-vec[0]
+  #vec=vec/max(abs(vec))
+  #return vec
+  
+
+
+def main():
+
+  # Parse command-line arguments
+  parser = argparse.ArgumentParser(usage=__doc__)
+  #parser.add_argument("-i","--input", help="input file (csv)")
+  parser.add_argument("filename", help="input file (csv)")
+  parser.add_argument("-o","--output", help="output binary file, otherwise input filename + .wfm extension will be used")
+  parser.add_argument("-n","--normalize", help="normalize input waveform to limits of binary format", action='store_true')
+  args = parser.parse_args()
+
+  #remove file extension, add wfm
+  infile_base = re.split('\.[^\.]+$',args.filename)[0]
+  outfile=infile_base+".wfm"
+  if args.output:
+    outfile=args.output
+
+  a = np.loadtxt(open(args.filename,"rb"),delimiter=",",skiprows=1)
+
+  #print a
+
+  x=a[:,0]
+  y=a[:,1]
+
+  #plt.plot(x,y)
+  #plt.show()
+
+  no_points = x.size
+  
+  if args.normalize:
+    print "normalizing"
+    x=x-x[0]
+    x=x/max(x)
+    y=y/max(abs(y))
+  
+  print "converting "+str(no_points)+" data points"
+  
+  #the file skeleton (with stuff in it that I don't understand
+  template = "42FEAF4201000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000800000000400000FF000000D80E05000000000000409F4000000000000000000000008040D594407DBFBE2AFFFFF73F0100000000000000"
+  #with open('template.bin', 'rb') as f:
+      #data = f.read()
+      
+  b = bytearray(template.decode("hex"))
+
+  ##debug output
+  #print ''.join('{:02X}'.format(x) for x in b)
+
+  #insert number of points
+  b[0x50] = no_points & 0xFF
+  b[0x51] = (no_points & 0xFF00)>>8
+  
+  #insert file name (first 8 characters)
+  for i in range(0,8):
+    if(i < len(infile_base)):
+      b[0x08+2*i] = infile_base[i]
+
+  #append data points
+  for i in range(0,no_points):
+    b=b+flip(min(0x4000,int(0x4000*x[i])))
+    b=b+flip(0)
+    b=b+flip(int(0x1FFF*y[i]))
+    b=b+flip(0)
+
+  #first point has to start at zero. or the function generator will crash. enforce it
+  b[0x80] = 0
+  b[0x81] = 0
+
+  #write out finished binary
+  print "done."
+  print "writing output file: "+outfile
+  with open(outfile, 'wb') as f:
+    f.write(b);
+  print "done."
+    
+   
+if __name__ == "__main__":
+  main()