Mercurial > pygpibtoolkit / file comparison
comparison: gpib_plotter.py
gpib_plotter.py
- changeset 12
- a04bea92c509
- parent 8
- aa3d55f78563
- child 27
- 0f8f2621418f
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| 11:3ccb0023cf41 | 12:a04bea92c509 |
|---|---|
| 1 import sys, os | 1 import sys, os |
| 2 import time | 2 import time |
| 3 import gpib | 3 import gpib |
| 4 | 4 |
| 5 class GPIBplotter(gpib.GPIB): | 5 import gpib |
| 6 from prologix import GPIB | |
| 7 class GPIBplotter(GPIB): | |
| 6 _replies={ | 8 _replies={ |
| 7 "OE": "0", | 9 "OE": "0", |
| 8 "OH": "0,0,10000,7500", | 10 "OH": "0,0,10000,7500", |
| 9 "OI": "7470A", | 11 "OI": "7470A", |
| 10 "OP": "0,0,10000,7500", | 12 "OP": "0,0,10000,7500", |
| 11 "OO": "0,1,0,0,0,0,0,0", | 13 "OO": "0,1,0,0,0,0,0,0", |
| 12 "OF": "40,40", | 14 "OF": "40,40", |
| 13 "OS": "24", | 15 "OS": "24", |
| 14 } | 16 } |
| 15 def __init__(self, device="/dev/ttyUSB0", baudrate=115200, timeout=0.1, | 17 def __init__(self, device="/dev/ttyUSB0", baudrate=115200, timeout=0.1, |
| 16 address=0): | 18 address=5): |
| 17 super(GPIBplotter, self).__init__(device, baudrate, timeout, address, mode=0) | 19 super(GPIBplotter, self).__init__(device, baudrate, timeout, address, mode=0) |
| 18 | 20 |
| 19 def load_plot(self, wait_timeout=0): | 21 def load_plot(self, wait_timeout=0): |
| 20 """ | 22 """ |
| 21 Make a full plot process. | 23 Make a full plot process. |
| 33 if wait_timeout<0: | 35 if wait_timeout<0: |
| 34 raise ValueError | 36 raise ValueError |
| 35 | 37 |
| 36 self._cnx.timeout = wait_timeout | 38 self._cnx.timeout = wait_timeout |
| 37 firstloop = True | 39 firstloop = True |
| 40 newdata = False | |
| 38 while i<self._retries: | 41 while i<self._retries: |
| 39 l = self._cnx.readline().strip() | 42 l = self._cnx.readline().strip() |
| 40 if firstloop: | 43 if firstloop: |
| 41 self._cnx.timeout = self._timeout | 44 self._cnx.timeout = self._timeout |
| 42 firstloop = False | 45 firstloop = False |
| 43 if l == "": | 46 if l == "": |
| 44 i += 1 | 47 if i == 0:# > (self._retries/2): |
| 45 if i == (self._retries-1): | 48 # ie. we just received new stuffs (i is reset in the else block) |
| 46 for k, v in replies.items(): | 49 for k, v in replies.items(): |
| 47 eres = res.strip() | 50 # check wether we should reply smthg |
| 51 eres = res.replace('\n', '').strip() | |
| 48 if eres.endswith(k) or eres.endswith(k+';') or eres.endswith(k+';OE'): | 52 if eres.endswith(k) or eres.endswith(k+';') or eres.endswith(k+';OE'): |
| 49 self._cnx.write("%s"%v) | 53 self._cnx.write("%s"%v) |
| 50 if k == "OS": | 54 if k == "OS": |
| 51 replies[k] = "16" | 55 replies[k] = "16" |
| 52 break | 56 break |
| 53 self._cnx.write('\r') | 57 self._cnx.write('\r') |
| 54 if i > self._retries/2: | 58 #time.sleep(0.1) |
| 55 time.sleep(self._timeout) | 59 i += 1 |
| 56 else: | 60 else: |
| 57 res += l + "\n" | 61 if not res: |
| 62 print "Plotting..." | |
| 63 res += l + '\n' | |
| 58 i = 0 | 64 i = 0 |
| 65 #time.sleep(0.1) | |
| 66 if res: | |
| 67 print "DONE (received %d characters)"%len(res) | |
| 59 return res | 68 return res |
| 60 | 69 |
| 61 if __name__ == '__main__': | 70 if __name__ == '__main__': |
| 62 import optparse | 71 import optparse |
| 63 opt = optparse.OptionParser('A simple HP7470A GPIB plotter emulator for USB-GPIB bundle (ProLogix)') | 72 opt = optparse.OptionParser('A simple HP7470A GPIB plotter emulator for USB-GPIB bundle (ProLogix)') |
| 103 sys.stderr.write('connection established\n') | 112 sys.stderr.write('connection established\n') |
| 104 | 113 |
| 105 loop = True | 114 loop = True |
| 106 nloop = 0 | 115 nloop = 0 |
| 107 while loop: | 116 while loop: |
| 108 plot = plotter.load_plot(wait_timeout=1) | 117 plot = plotter.load_plot(wait_timeout=0.1) |
| 109 if options.verbose: | 118 if options.verbose: |
| 110 sys.stderr.write('.') | 119 sys.stderr.write('.') |
| 111 if plot: | 120 if plot: |
| 112 outf.write(plot) | 121 outf.write(plot) |
| 113 if options.verbose: | 122 if options.verbose: |
