pshell_config/x03da
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This commit is contained in:
gac-x03da
2018-02-08 17:18:31 +01:00
parent c64c1d22c9
commit 090d299c8a
1 changed files with 13 additions and 16 deletions
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29
script/keithley.py
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@@ -32,8 +32,8 @@ class Keithley(object):
dwell = dwell time in seconds (0.1 - 20.0)
"""
self.scanCh.putq(0)
self.ttypeCh.putq(2)
self.scanCh.write(0)
self.ttypeCh.write(2)
nplc = 5.
navg = dwell / 0.1
if navg > 100:
@@ -41,25 +41,22 @@ class Keithley(object):
navg /= 2
navg = min(navg, 100)
nplc = min(nplc, 10.)
self.nplcCh.putq(nplc)
self.navgCh.putq(navg)
self.nplcCh.write(nplc)
self.navgCh.write(navg)
def trig(self):
"""
trigger keithleys, wait until done, and read the result into EPICS.
the value can then be read by pshell from the channel.
"""
dwell1 = caget(KEI_SAMPLE + "TOTTIME") / 1000.
dwell2 = caget(KEI_REF + "TOTTIME") / 1000.
dwell = max(dwell1, dwell2)
self.doinitCh.put(1)
self.dotriggerCh.put(1)
self.doinitCh.write(1)
self.dotriggerCh.write(1)
def get_dwell(self):
"""
get dwell time in seconds.
"""
dwell = self.tottimeCh.get() / 1000.
dwell = self.tottimeCh.read() / 1000.
return dwell
def fetch(self):
@@ -67,23 +64,23 @@ class Keithley(object):
fetch the current value from the keithley into EPICS.
"""
#time.sleep(self.get_dwell())
self.dofetchCh.put(1)
self.dofetchCh.write(1)
def read(self):
"""
read the curent value.
"""
return self.readoutCh.get()
return self.readoutCh.read()
def release(self):
"""
switch keithleys to free run.
0.1 s polling and dwell time
"""
self.nplcCh.putq(nplc)
self.navgCh.putq(navg)
self.scanCh.putq(9)
self.ttypeCh.putq(0)
self.nplcCh.write(nplc)
self.navgCh.write(navg)
self.scanCh.write(9)
self.ttypeCh.write(0)
KeiSample = Keithley("SampleKeithley", "X03DA-KEITHLEY-1:")
KeiReference = Keithley("ReferenceKeithley", "X03DA-KEITHLEY-2:")