Mercurial > pygpibtoolkit / file comparison
comparison: dump_as_ascii.py
dump_as_ascii.py
- changeset 1
- 0670b1f5c155
- parent 0
- 9af1509775b6
- child 2
- cd9efa64f6da
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| 0:9af1509775b6 | 1:0670b1f5c155 |
|---|---|
| 1 import sys | |
| 2 import time | |
| 3 import serial | |
| 4 | |
| 5 MODE = {'binary': 'DDBN', | |
| 6 'ascii': 'DDAS', | |
| 7 'ansi': 'DDAN', | |
| 8 } | |
| 9 class ConnectionError(Exception): | |
| 10 pass | |
| 11 | |
| 12 def read_trace(cnx, mode="binary"): | |
| 13 mode = mode.lower() | |
| 14 assert mode in MODE | |
| 15 mode = MODE[mode] | |
| 16 res = "" | |
| 17 cnx.write('%s\r'%mode) | |
| 18 i = 0 | |
| 19 while i<5: | |
| 20 l = cnx.readline() | |
| 21 if l.strip() == "": | |
| 22 i += 1 | |
| 23 time.sleep(0.1) | |
| 24 continue | |
| 25 #print "got a new line (%s chars) [i=%s]"%(len(l), i) | |
| 26 res += l | |
| 27 i = 0 | |
| 28 return res | |
| 29 | |
| 30 def open_connection(device="/dev/ttyUSB0", baudrate=115200, timeout=0.1, | |
| 31 address=0, mode=1): | |
| 32 p = serial.Serial(port=device, baudrate=baudrate, timeout=timeout) | |
| 33 | |
| 34 p.write('++addr %d\r'%address) # set address to 0 | |
| 35 p.write('++mode %d\r'%mode) # read listen only mode | |
| 36 p.write('++mode\r') | |
| 37 i = 0 | |
| 38 for i in range(10): | |
| 39 rmode = p.readline().strip() | |
| 40 if rmode != "": | |
| 41 break | |
| 42 time.sleep(timeout) | |
| 43 | |
| 44 if rmode == '' or int(rmode) != mode: | |
| 45 raise ConnectionError("Can't set GPIB mode to %s"%mode) | |
| 46 return p | |
| 47 | |
| 48 | |
| 49 import optparse | |
| 50 opt = optparse.OptionParser() | |
| 51 opt.add_option('-f', '--filename', default=None, | |
| 52 dest='filename', | |
| 53 help='Output filename. If not set, write to stdout') | |
| 54 opt.add_option('-d', '--device', default='/dev/ttyUSB0', | |
| 55 dest='device', | |
| 56 help='Device of the RS232 connection (default: /dev/ttyUSB0)', | |
| 57 ) | |
| 58 opt.add_option('-m', '--mode', default='binary', | |
| 59 dest='mode', | |
| 60 help='Dumping mode (may be "binary" [default], "ascii" or "ansi")', | |
| 61 ) | |
| 62 opt.add_option('-a', '--address', default=0, | |
| 63 dest='address', | |
| 64 help='GPIB address of the device', | |
| 65 ) | |
| 66 options, argv = opt.parse_args(sys.argv) | |
| 67 | |
| 68 cnx = open_connection(device=options.device, | |
| 69 address=int(options.address), mode=1) | |
| 70 res = read_trace(cnx, mode=options.mode) | |
| 71 | |
| 72 if options.filename: | |
| 73 open(options.filename, 'w').write(res) | |
| 74 else: | |
| 75 print res | |
| 76 |
