--- a/HP3562A/coord_decoder.py Mon Feb 04 19:49:48 2008 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,126 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-state_decoder
-=============
-
-Module for decoding the internal state of the HP3562A DSA, using the
-GPIB command "DSBN" (Dump State BiNary).
-
-This file can be exectued as a python script. Use '-h' for more informations.
-"""
-
-from HP3562A import format_header, decode_float, decode_string, decode_header, read_trace
-from HP3562A.trace_decoder import decode_trace, HEADER as TRACE_HEADER
-from HP3562A.enum_types import *
-
-HEADER = [("Y coordinates", EYCOORD, 'h', 2),
- ("# of disp elements", int, "h", 2),
- ("First element", int, "h", 2),
- ("Total elements", int, 'h', 2),
- ("Display sampling", EDISPSMP, 'h', 2),
- ("Scaling", ESCAL, 'h', 2),
- ("Data pointer", long, 'l', 4),
- ("In data", long, 'l', 4),
- ("Log/linear x-axis", bool, 'h', 2),
- ("Sampled display data", bool, 'h', 2),
- ("Plot/Graph mode", bool, 'h', 2),
- ("Phase wrap", bool, 'h', 2),
- ("Not used", None, None, 36),
- ("X scale factor", decode_float, None, 4),
- ("Grid min Y scale", decode_float, None, 4),
- ("Grid max Y scale", decode_float, None, 4),
- ("/div", decode_float, None, 4),
- ("Min value of data", decode_float, None, 4),
- ("Max value of data", decode_float, None, 4),
- ("Y cumulative min", decode_float, None, 4),
- ("Y cumulative max", decode_float, None, 4),
- ("Y scale factor", decode_float, None, 4),
- ("Not used", None, None, 16),
- ("Stop value", decode_float, None, 8),
- ("Left grid", decode_float, None, 8),
- ("Right grid", decode_float, None, 8),
- ("Left data", decode_float, None, 8),
- ("Right data", decode_float, None, 8),
- ]
-
-def decode_coord(data):
- """
- Decode the data (as generated by the HP3562A DSA in response to a
- "DSBN" command), and returns a dict (header)
-
- header is the dictionnary of the header of the dumped data block,
- """
- header, idx = decode_header(data, HEADER)
- trace_header, idx = decode_header(data, TRACE_HEADER, idx)
- trace = read_trace(data, idx, trace_header["Number of elements"])
- return header, trace_header, trace
-
-
-def main():
- import sys
- import optparse
- import numpy
-
- opt = optparse.OptionParser("A simple tool for displaying dumped coord data block")
- opt.add_option('-f', '--filename', default=None,
- dest='filename',
- help='Output filename. If not set, read from stdin')
- opt.add_option('-m', '--mode', default='binary',
- dest='mode',
- help='Dumping mode (may be "binary" [default], "ascii" or "ansi")',
- )
- opt.add_option('-d', '--display-header', default=False,
- action="store_true",
- dest="displayheader",
- help="Display the trace header")
- opt.add_option('-P', '--noplot-trace', default=True,
- action="store_false",
- dest="plot",
- help="Do not display the plot of the trace")
- opt.add_option('-x', '--xmode', default='lin',
- dest='xmode',
- help='X coordinate mode (may be "lin" [default] or "log")')
- opt.add_option('-y', '--ymode', default='lin',
- dest='ymode',
- help='Y coordinate mode (may be "lin" [default], "log" or "db")')
-
- options, argv = opt.parse_args(sys.argv)
-
-
- if options.filename is None:
- print "Can't deal stdin for now..."
- sys.exit(1)
- try:
- coord_header, header, data = decode_coord(open(options.filename, 'rb').read())
- except Exception, e:
- print "ERROR: can't read %s an interpret it as a HP3562 trace"%options.filename
- print e
- sys.exit(1)
-
- if options.displayheader:
- print format_header(coord_header, HEADER, 100)
- print format_header(header, TRACE_HEADER, 100)
- if options.plot:
- f0 = header['Start freq value']
- dx = header['Delta X-axis']
- n = header['Number of elements']
- x = numpy.linspace(f0, f0+dx*n, len(data))
- y = data.copy()
-
- ym = coord_header['Min value of data']
- yM = coord_header['Max value of data']
- ys = coord_header['Y scale factor']
-
- y[y<ym] = ym
- y *= ys
-
- import pylab
- pylab.ylabel(header['Amplitude units'])
- pylab.grid()
- pylab.plot(x, y)
- pylab.xlabel('frequency (%s)'%header["X axis units"])
- pylab.ylabel("%s (%s)"%(coord_header['Y coordinates'], header['Amplitude units']) )
- pylab.show()
-
-if __name__ == "__main__":
- main()