--- a/gpib_plotter.py Fri Jan 25 20:51:56 2008 +0100
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,139 +0,0 @@
-import sys, os
-import time
-import gpib
-
-import gpib
-from prologix import GPIB
-class GPIBplotter(GPIB):
- _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",
- }
- def __init__(self, device="/dev/ttyUSB0", baudrate=115200, timeout=0.1,
- address=5):
- super(GPIBplotter, self).__init__(device, baudrate, timeout, address, mode=0)
-
- def plotStarted(self):
- pass
-
- def load_plot(self, wait_timeout=0):
- """
- Make a full plot process.
-
- 'wait_timeout' is the first timeout. Same semantic as the
- 'timeout' property of a serial connection (if set to None, it
- will block until the GPIB device actually perform a plot
- command.)
- """
- res = ""
- i=0
- replies = self._replies.copy()
- if wait_timeout is not None and not isinstance(wait_timeout, (float, int)):
- raise TypeError, "wait_timeout (%s:%s) has wrong type"%(repr(wait_timeout), type(wait_timeout))
- if wait_timeout<0:
- raise ValueError
-
- self._cnx.timeout = wait_timeout
- firstloop = True
- newdata = False
- while i<self._retries:
- l = self._cnx.readline().strip()
- if firstloop:
- self._cnx.timeout = self._timeout
- firstloop = False
- self.plotStarted()
- if l == "":
- if i == 0:# > (self._retries/2):
- # ie. we just received new stuffs (i is reset in the else block)
- for k, v in replies.items():
- # check wether we should reply smthg
- eres = res.replace('\n', '').strip()
- if eres.endswith(k) or eres.endswith(k+';') or eres.endswith(k+';OE'):
- self._cnx.write("%s"%v)
- if k == "OS":
- replies[k] = "16"
- break
- self._cnx.write('\r')
- #time.sleep(0.1)
- i += 1
- else:
- if not res:
- print "Plotting..."
- res += l + '\n'
- i = 0
- #time.sleep(0.1)
- if res:
- print "DONE (received %d characters)"%len(res)
- return res
-
-if __name__ == '__main__':
- import optparse
- opt = optparse.OptionParser('A simple HP7470A GPIB plotter emulator for USB-GPIB bundle (ProLogix)')
- 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('-a', '--address', default=0,
- dest='address',
- help='GPIB address of the device',
- )
- opt.add_option('-l', '--loop', default=False,
- action="store_true",
- dest="loop",
- help="Continuously wait for new plots. If set, filename must be set and files will be created with _n at the end")
- opt.add_option('-v', '--verbose', default=False,
- action="store_true",
- dest="verbose",
- help="Verbose mode",)
-
- options, argv = opt.parse_args(sys.argv)
-
- if options.loop and not options.filename:
- opt.error('If loop is set, you *must* provide a filename')
-
- if options.filename:
- outf = open(options.filename, "w")
- else:
- outf = sys.stdout
-
-
- try:
- plotter = GPIBplotter(device=options.device, address=int(options.address),
- timeout=0.06)
- except (gpib.SerialException, gpib.ConnectionError), e:
- sys.stderr.write('Connection error:\n\t' + '\n\t'.join([str(x) for x in e.args]) + '\n')
- sys.stderr.write('Check your parameters\n')
- sys.exit(1)
- if options.verbose:
- sys.stderr.write('connection established\n')
-
- loop = True
- nloop = 0
- while loop:
- plot = plotter.load_plot(wait_timeout=0.1)
- if options.verbose:
- sys.stderr.write('.')
- if plot:
- outf.write(plot)
- if options.verbose:
- sys.stderr.write('\n')
- sys.stderr.write('Received a new plot (written to %s)\n'%outf.name)
- if not options.loop:
- loop = False
- else:
- nloop += 1
- fname, ext = os.path.splitext(options.filename)
- outf = open(fname + "_%d"%nloop + ext, 'w')
-
-
-
-
-