add dilhtr

cfg/dilhtr_cfg.py

@@ -0,0 +1,16 @@
+Node('dilhtrtest.psi.ch',
+     'dilhtr test',
+     'tcp://5000',
+     )
+
+Mod('io',
+    'frappy_psi.dilhtr.IO',
+    'dilhtr communication',
+    uri='serial:///dev/tty.usbserial-21440?baudrate=9600',
+    )
+
+Mod('heater',
+    'frappy_psi.dilhtr.Heater',
+    'dilhtr box',
+    io='io',
+    )

frappy_psi/dilhtr.py

@@ -0,0 +1,74 @@
+# *****************************************************************************
+# 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>
+# *****************************************************************************
+
+from frappy.core import StringIO, HasIO, Writable, Parameter, FloatRange, IntRange, \
+    IDLE, ERROR
+from frappy.errors import CommunicationFailedError
+
+
+class IO(StringIO):
+    end_of_line = '\n'
+    identification = [('id', 'dilhtr.*')]
+    default_settings = {'baudrate': 9600}
+
+
+class Heater(HasIO, Writable):
+
+    ioClass = IO    # define IO class for automatic creation of the IO module
+
+    target = Parameter('power target value', FloatRange(0, 6e6, unit='W'), readonly=False)
+    value = Parameter('power reading', FloatRange(unit='W'))
+    resistance = Parameter('resistance reading', FloatRange(unit='Ohm'))
+    current = Parameter('curren reading', FloatRange(unit='A'))
+    voltage = Parameter('voltage reading', FloatRange(unit='V'))
+    range = Parameter('range reading', IntRange(1, 3))
+
+    status_map = {'0' : (IDLE, ''),
+                  '1' : (ERROR, 'short circuit'),
+                  '2' : (ERROR, 'open circuit')}
+
+    def request(self, code):
+        reply, txtvalue = self.communicate(f'{code}').split('=')
+        if reply != code:
+            raise CommunicationFailedError(f'bad reply: {reply}')
+        return float(txtvalue)
+
+    def write_target(self, target):
+        self.communicate(f'p={target * 1e6}')   # W to uW
+
+    def read_value(self):
+        return self.request('pr') * 1e-6    # uW to W
+
+    def read_resistance(self):
+        return self.request('r')
+
+    def read_current(self):
+        return self.request('i') * 1e-3     # mA to A
+
+    def read_voltage(self):
+        return self.request('v') * 1e-3     # mV to V
+
+    def read_range(self):
+        return int(self.request('k'))
+
+    def read_status(self):
+        reply, status = self.communicate('h').split('=')
+        if reply != 'h':
+            raise CommunicationFailedError(f'bad reply from status request: {reply}')
+        return self.status_map.get(status, (ERROR, 'bad status'))