add pdld laser driver

2 modules: a switch (on/off) and the power (set: target, readback:value)

frappy_psi/pdld.py

@@ -0,0 +1,68 @@
+# *****************************************************************************
+# 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:
+#   Markus Zolliker <markus.zolliker@psi.ch>
+# *****************************************************************************
+"""PDLD Laser"""
+
+
+from frappy.core import StringIO, Parameter, HasIO, \
+    Writable, FloatRange, BoolType, IDLE, ERROR
+
+
+class IO(StringIO):
+    end_of_line = ('>', '\r')
+
+
+class Laser(HasIO, Writable):
+    ioClass = IO
+    value = Parameter('on/off', BoolType())
+    target = Parameter('on/off', BoolType())
+
+    def get_par(self, cmd):
+        return float(self.communicate(cmd).split()[-1])
+
+    def read_value(self):
+        reply = float(self.communicate('MCM').split()[-1])
+        if reply == 10:
+            self.status = IDLE, ''
+            return True
+        if reply in (0, 40):
+            self.status = IDLE, ''
+            return False
+        return ERROR, 'bad OP mode %s', reply
+
+    def write_target(self, value):
+        if value:
+            self.communicate('SALO')
+        else:
+            self.communicate('SALS')
+
+
+class LaserPower(HasIO, Writable):
+    value = Parameter('power readback', FloatRange(unit='mW'))
+    target = Parameter('power setpoint', FloatRange(0, 300, unit='mW'), readonly=False)
+    ioClass = IO
+
+    def read_value(self):
+        return float(self.communicate('MPO').split()[-1])
+
+    def read_target(self):
+        return float(self.communicate('MPR').split()[-1])
+
+    def write_target(self, value):
+        self.communicate(f'SPR{int(value):03d}')
+