Mercurial > pygpibtoolkit / changeset

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dump_as_ascii.py	Mon Dec 10 20:05:39 2007 +0100
@@ -0,0 +1,76 @@
+import sys
+import time
+import serial
+
+MODE = {'binary': 'DDBN',
+        'ascii': 'DDAS',
+        'ansi': 'DDAN',
+        }
+class ConnectionError(Exception):
+    pass
+
+def read_trace(cnx, mode="binary"): 
+    mode = mode.lower()
+    assert mode in MODE
+    mode = MODE[mode]
+    res = ""
+    cnx.write('%s\r'%mode)
+    i = 0
+    while i<5:
+        l = cnx.readline()
+        if l.strip() == "":
+            i += 1
+            time.sleep(0.1)
+            continue
+        #print "got a new line (%s chars) [i=%s]"%(len(l), i)
+        res += l 
+        i = 0
+    return res
+
+def open_connection(device="/dev/ttyUSB0", baudrate=115200, timeout=0.1,
+                    address=0, mode=1):
+    p = serial.Serial(port=device, baudrate=baudrate, timeout=timeout)
+
+    p.write('++addr %d\r'%address) # set address to 0
+    p.write('++mode %d\r'%mode) # read listen only mode
+    p.write('++mode\r')
+    i = 0
+    for i in range(10):    
+        rmode = p.readline().strip()
+        if rmode != "":
+            break
+        time.sleep(timeout)
+        
+    if rmode == '' or int(rmode) != mode:
+        raise ConnectionError("Can't set GPIB mode to %s"%mode)
+    return p
+
+
+import optparse
+opt = optparse.OptionParser()
+opt.add_option('-f', '--filename', default=None,
+               dest='filename',
+               help='Output filename. If not set, write to stdout')
+opt.add_option('-d', '--device', default='/dev/ttyUSB0',
+               dest='device',
+               help='Device of the RS232 connection (default: /dev/ttyUSB0)',
+               )
+opt.add_option('-m', '--mode', default='binary',
+               dest='mode',
+               help='Dumping mode (may be "binary" [default], "ascii" or "ansi")',
+               )
+opt.add_option('-a', '--address', default=0,
+               dest='address',
+               help='GPIB address of the device',
+               )
+options, argv = opt.parse_args(sys.argv)
+
+cnx = open_connection(device=options.device,
+                      address=int(options.address), mode=1)
+res = read_trace(cnx, mode=options.mode)
+
+if options.filename:
+    open(options.filename, 'w').write(res)
+else:
+    print res
+    

Binary file examples/dump.ansi has changed

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/dump.asc	Mon Dec 10 20:05:39 2007 +0100
@@ -0,0 +1,868 @@
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++0.000000E+00
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Binary file examples/dump_1_21_ftop.bin has changed

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/load_gpib_plot.py	Mon Dec 10 20:05:39 2007 +0100
@@ -0,0 +1,54 @@
+import sys
+import time
+import serial
+p = serial.Serial(port="/dev/ttyUSB0", baudrate=115200, timeout=0.1)
+
+p.write('++addr 5\r') # set address to 0
+p.write('++mode 0\r') # read listen only mode
+p.write('++mode\r')
+for i in range(10):    
+    mode = p.readline().strip()
+    if mode != "":
+        break
+    time.sleep(0.1)
+print "mode = ", mode
+if mode == '':
+    print "strange"
+    sys.exit()
+
+res = ""
+i=0
+
+replies={
+    "OE": "0",
+    "OH": "0,0,10000,7500",
+    "OI": "7470A",
+    "OP": "0,0,10000,7500",
+    "OO": "0,1,0,0,0,0,0,0",
+    "OF": "40,40",
+    "OS": "24",
+    }
+
+while i<15:
+    l = p.readline().strip()
+    if l == "":
+        i += 1
+        for k, v in replies.items():
+            if res.endswith(k) or res.endswith(k+';'):
+                print "got commend", k
+                p.write("%s"%v)
+                if k == "OS":
+                    replies[k] = "16"
+                break
+        p.write('\r')
+        time.sleep(0.1)
+        continue
+    print "got a new line (%s chars) [i=%s]"%(len(l), i)
+    res += l + "\n"
+    i = 0
+print "over"
+print "res = ", res
+
+open('out.gpib', 'w').write(res)
+
+

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/read_trace.py	Mon Dec 10 20:05:39 2007 +0100
@@ -0,0 +1,294 @@
+# -*- coding: utf-8 -*-
+
+import struct
+
+
+def decode_float(s):
+    assert len(s) in [4,8]
+    # exponential term 
+    e = ord(s[-1])
+    if e & 0x80:
+        e = e - 256
+
+    # mantissa
+    m = [ord(x) for x in s[:-1]]
+    M = 0.
+    for i in range(len(s)-1):
+        #M += m[i]<<(i*8)
+        M += float(m[i])/2**((i+1)*8)
+
+    #if m[0] & 0x80:
+    #    M = M - 2^(len(s))
+
+    return M * 2**(e+1)
+    mm = str(M)
+    
+    mm = '0.'+mm + 'e' + str(e)
+    if len(s) == 8:
+        print "mm = ", mm
+    return eval(mm)
+
+def decode_string(s):
+    nb = ord(s[0])
+    s = s[1:nb+2]
+    r = ""
+    for c in s:
+        if ord(c)>128:
+            c = chr(ord(c)-128)
+        r += c
+    return r
+
+EDSP = {0: "No data",
+        1: "Frequency response",
+        2: "Power spectrum 1",
+        3: "Power spectrum 2",
+        4: "Coherence",
+        5: "Cross spectrum",
+        6: "Input time 1",
+        7: "Input time 2",
+        8: "Input linear spectrum 1",
+        9: "Input linear spectrum 2",
+        10: "Impulse response",
+        11: "Cross correlation",
+        12: "Auto correlation 1",
+        13: "Auto correlation 2",
+        14: "Histogram 1",
+        15: "Histogram 2",
+        16: "Cumulative density function 1",
+        17: "Cumulative density function 2",
+        18: "Probability density function 1",
+        19: "Probability density function 2",
+        20: "Average linear spectrum 1",
+        21: "Average linear spectrum 2",
+        22: "Average time record 1",
+        23: "Average time record 2",
+        24: "Synthesis pole-zeros",
+        25: "Synthesis pole-residue",
+        26: "Synthesis polynomial",
+        27: "Synthesis constant",
+        28: "Windowed time record 1",
+        29: "Windowed time record 2",
+        30: "Windowed linear spectrum 1",
+        31: "Windowed linear spectrum 2",
+        32: "Filtered time record 1",
+        33: "Filtered time record 2",
+        34: "Filtered linear spectrum 1",
+        35: "Filtered linear spectrum 2",
+        36: "Time capture buffer",
+        37: "Captured linear spectrum",
+        38: "Captured time record",
+        39: "Throughput time record 1",
+        40: "Throughput time record 2",
+        41: "Curve fit",
+        42: "Weighted function",
+        43: "Not used",
+        44: "Orbits",
+        45: "Demodulation polar",
+        46: "Preview demod record 1",
+        47: "Preview demod record 2",
+        48: "Preview demod linear spectrum 1",
+        49: "Preview demod linear spectrum 2",
+        }
+
+ECH = {0: "Channel 1",
+       1: "Channel 2",
+       2: "Channel 1&2",
+       3: "No channel",
+       }
+
+EOVR = ECH
+
+EDOM = {0: 'Time',
+        1: 'Frequency',
+        2: 'Voltage (amplitude)',
+        }
+
+EVLT = {0: "Peak",
+        1: "RMS",
+        2: "Volt (indicates peak only)",
+        }
+
+EAMP = {0: "Volts",
+        1: "Volts squared",
+        2: "PSD (V²/Hz)",
+        3: "ESD (V²s/Hz)",
+        4: "PSD¹² (V/Hz¹²)",
+        5: "No unit",
+        6: "Unit volts",
+        7: "Unit volts²",
+        }
+        
+EXAXIS= {0: "No units",
+         1: "Hertz",
+         2: "RPM",
+         3: "Orders",
+         4: "Seconds",
+         5: "Revs",
+         6: "Degrees",
+         7: "dB",
+         8: "dBV",
+         9: "Volts",
+         10: "V Hz¹²",
+         11: "Hz/s",
+         12: "V/EU",
+         13: "Vrms",
+         14: "V²/Hz",
+         15: "%",
+         16: "Points",
+         17: "Records",
+         18: "Ohms",
+         19: "Hertz/octave",
+         20: "Pulse/Rev",
+         21: "Decades",
+         22: "Minutes",
+         23: "V²s/Hz",
+         24: "Octave",
+         25: "Seconds/Decade",
+         26: "Seconds/Octave",
+         #...
+         }
+
+EMEAS = {0: "Linear resolution",
+         1: "Log resolution",
+         2: "Swept sine",
+         3: "Time capture",
+         4: "Linear resolution throughput",
+         }
+
+EDEMOD1 = {45: "AM",
+           46: "FM",
+           47: "PM",
+           }
+
+EDEMOD2 = EDEMOD1
+
+EAVG = {0: "No data",
+        1: "Not averaged",
+        2: "Averaged",}
+
+
+
+EWIN = {0: "N/A",
+        1: "Hann",
+        2: "Flat top",
+        #...
+        }
+
+HEADER = [ ("Display function", EDSP, 'h', 2),
+           ('Number of elements', int, 'h', 2),
+           ('Displayed elements', int, 'h', 2),
+           ('Number of averages', int, 'h', 2),
+           ('Channel selection', ECH, 'h', 2),
+           ('Overflow status', EOVR, 'h', 2),
+           ('Overlap percentage', int, 'h', 2),
+           ('Domain', EDOM, 'h', 2),
+           ('Volts peak/rms', EVLT, 'h', 2),
+           ('Amplitude units', EAMP, 'h', 2),
+           ('X axis units', EXAXIS, 'h', 2),
+           ('Auto math label', str, 's', 14),
+           ('Trace label', str, 's', 22),
+           ('EU label 1', str, 's', 6),
+           ('EU label 2', str, 's', 6),
+           ('Float/Interger', bool, 'h', 2),
+           ('Complex/Real', bool, 'h', 2),
+           ('Live/Recalled', bool, 'h', 2),
+           ('Math result', bool, 'h', 2),
+           ('Real/Complex input', bool, 'h', 2),
+           ('Log/Linear data', bool, 'h', 2),
+           ('Auto math', bool, 'h', 2),
+           ('Real time status', bool, 'h', 2),
+           ('Measurement mode', EMEAS, 'h', 2),
+           ('Window', EWIN, 'h', 2),
+           ('Demod type channel 1', EDEMOD1, 'h', 2),
+           ('Demod type channel 2', EDEMOD2, 'h', 2),
+           ('Demod active channel 1', bool, 'h', 2),
+           ('Demod active channel 2', bool, 'h', 2),
+           ('Average status', EAVG, 'h', 2),
+           ('Not used', int, 'hh', 4),
+           ('Samp freq/2 (real)', decode_float, None, 4),
+           ('Samp freq/2 (imag)', decode_float, None, 4),
+           ('Not used', decode_float, None, 4),
+           ('Delta X-axis', decode_float, None, 4),
+           ('Max range', decode_float, None, 4),
+           ('Start time value', decode_float, None, 4),
+           ('Expon wind const 1', decode_float, None, 4),
+           ('Expon wind const 2', decode_float, None, 4),
+           ('EU value chan 1', decode_float, None, 4),
+           ('EU value chan 2', decode_float, None, 4),
+           ('Trig delay chan 1', decode_float, None, 4),
+           ('Trig delay chan 2', decode_float, None, 4),
+           ('Start freq value', decode_float, None, 8),
+           ('Start data value', decode_float, None, 8),
+           ]
+
+def decode_file(filename):
+    d = open(filename).read()
+
+    typ = d[:2]
+    assert typ == "#A"
+
+    totlen = struct.unpack('>h', d[2:4])[0]
+    idx = 4
+    tt=0
+    header = {}
+    for i, (nam, dtype, fmt, nbytes) in enumerate(HEADER):
+        if dtype == str:
+            val = decode_string(d[idx:])
+        else:
+            if fmt:
+                v = struct.unpack('>'+fmt, d[idx: idx+nbytes])[0]
+                if isinstance(dtype, dict):
+                    val = dtype.get(int(v), "N/A")
+                else:
+                    val = dtype(v)
+            else:
+                val = dtype(d[idx: idx+nbytes])
+
+        print idx, hex(idx), nam, ":", val
+        header[nam] = val
+        idx += nbytes
+
+    resu = []
+
+    for i in range(header["Number of elements"]):
+        resu.append(decode_float(d[idx: idx+4]))
+        idx += 4
+
+    #print "resu = ", resu
+    #return
+    import pylab
+    import numpy
+    resu = numpy.array(resu, dtype=float)
+    print "max = ", max(resu)
+    #xr = numpy.linspace(0, header['Delta X-axis'], len(resu))
+    sf = header['Start freq value']
+    xr = numpy.linspace(sf, sf+20000, len(resu))
+    mn = min(resu[resu>0])
+    resu[resu==0] = mn
+    pylab.plot(xr, 10*numpy.log10(resu))
+    pylab.show()
+
+    # tt=0
+    # for i, (nam, dtype, nbytes) in enumerate(HEADER):
+    #     if dtype == str:
+    #       nb = ord(struct.unpack('c', d[idx])[0])
+    #       val = d[idx+1:idx+1+nb]
+    #     else:
+    #         v = struct.unpack('>d', d[idx: idx+(nbytes*4)])[0]
+    #         if isinstance(dtype, dict):
+    #             val = dtype.get(int(v), "N/A")
+    #         else:
+    #             val = dtype(v)
+    #     print idx, nam, ":", val
+    #     idx += nbytes*4
+        
+                             
+          
+
+if __name__ == "__main__":
+    import sys
+    decode_file(sys.argv[1])
+
+
+    
+