frappy_psi: add file

frappy_psi/sim_dil.py

@@ -0,0 +1,63 @@
+# *****************************************************************************
+#
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU General Public License as published by the Free Software
+# Foundation; either version 2 of the License, or (at your option) any later
+# version.
+#
+# This program is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+# details.
+#
+# You should have received a copy of the GNU General Public License along with
+# this program; if not, write to the Free Software Foundation, Inc.,
+# 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+#
+# Module authors:
+#  Anik Stark <anik.stark@psi.ch>
+#
+# *****************************************************************************
+
+import time
+from frappy.core import Parameter, EnumType, FloatRange, Writable
+
+
+class Valve(Writable):
+
+    value = Parameter('state of valve (open or close)', datatype=EnumType(open=1, close=0))
+    target = Parameter('open or close valve', datatype=EnumType(open=1, close=0))
+
+    def write_target(self, target):
+        self.value = target
+
+
+class PulsedValve(Valve):
+
+    delay = Parameter('delay (time valve is open)', FloatRange(unit='s'), readonly=False)
+    _start = 0
+
+    def write_target(self, target):
+        if target:
+            self._start = time.time()
+            self.setFastPoll(True, 0.01)
+            self.value = target
+        else:
+            self.setFastPoll(False)
+
+    def doPoll(self):
+        super().doPoll()
+        if self._start:
+            if time.time() > self._start + self.delay:
+                self.write_target(0)
+                self.value = 0
+                self._start = 0
+
+
+class Sensor(Writable):
+    """ Pressure and motor valve. """
+
+    value = Parameter('sensor value', datatype=FloatRange(), readonly=False)
+
+    def write_target(self, target):
+        self.value = target