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Today's Topics:
1. r5693 - developers/werner/ahrt/host/tmc/lib
(wer...@docs.openmoko.org)
--- Begin Message ---
Author: werner
Date: 2009-10-16 06:07:21 +0200 (Fri, 16 Oct 2009)
New Revision: 5693
Modified:
developers/werner/ahrt/host/tmc/lib/meter.py
Log:
- lib/meter.py: added front/rear and scanner channel selection for Picotest
M3500A
Modified: developers/werner/ahrt/host/tmc/lib/meter.py
===================================================================
--- developers/werner/ahrt/host/tmc/lib/meter.py 2009-10-14 13:59:55 UTC
(rev 5692)
+++ developers/werner/ahrt/host/tmc/lib/meter.py 2009-10-16 04:07:21 UTC
(rev 5693)
@@ -2,6 +2,7 @@
# meter.py - Multimeter control
#
# Copyright (C) 2008, 2009 by OpenMoko, Inc.
+# Copyright (C) 2009 by Werner Almesberger
# Written by Werner Almesberger <wer...@openmoko.org>
# All Rights Reserved
#
@@ -25,7 +26,7 @@
#
-from tmc.instrument import instrument, setting
+from tmc.instrument import instrument, setting, settings
class meter(instrument):
@@ -71,9 +72,77 @@
self.send(":SYST:REM")
+class m3005a_chan(settings):
+
+ def __init__(self, instr):
+ self.curr = None
+ self.front = None
+ self.scanner = None
+ self.instr = instr
+
+ def is_front(self):
+ if self.front is None:
+ term = self.instr.query("ROUT:TERM?")
+ if term == "FRON":
+ self.front = True
+ elif term == "REAR":
+ self.front = False
+ else:
+ raise hell
+ return self.front
+
+ def has_scanner(self):
+ if self.scanner is None:
+ term = self.instr.query("ROUT:STAT?")
+ if term == "1":
+ self.scanner = True
+ elif term == "0":
+ self.scanner = False
+ else:
+ raise hell
+ return self.scanner
+
+ def get(self):
+ if self.curr is None:
+ if self.is_front():
+ self.curr = 0
+ else:
+ if self.has_scanner():
+ closed = self.instr.query("ROUT:CLOS?")
+ self.curr = None
+ n = 1
+ for ch in closed:
+ if ch == "1":
+ if self.curr is not None:
+ raise hell
+ self.curr = n
+ n += 1
+ else:
+ self.curr = 1
+ return self.curr
+
+ def set(self, value):
+ if self.curr is not None and self.curr == value:
+ return
+ if self.is_front():
+ if value != 0:
+ raise hell
+ else:
+ if value < 1 or value > 10:
+ raise hell
+ if self.has_scanner():
+ self.instr.send("ROUT:OPEN")
+ self.instr.send("ROUT:CLOS "+str(value))
+ else:
+ if value > 1:
+ raise hell
+ self.curr = value
+
+
class picotest_m3500a(meter):
def __init__(self):
meter.__init__(self, "usbtmc", "timeout=2", "retry", "vendor=0x164e",
"product=0x0dad")
+ self.chan = m3005a_chan(self)
self.lock_attr()
--- End Message ---
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