add pty-gpib-emulator from github

pty-gpib-emulator/python/PowerSupply.py

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+##
+## <<<< Powersupply Emulators >>>>
+## by Aidan Macdonald (aidan.plenert.macdonald@gmail.com)
+## 
+## Contains classes that emulate powersupplies by
+## building off the Device framework
+## 
+
+import Device, Prologix
+
+## **** Power Supply class ****
+## by Aidan Macdonald (aidan.plenert.macdonald@gmail.com) 
+##
+## General model of a basic Power Supply
+## 
+
+class PowerSupply(Prologix.Prologix_GPIB_USB):
+
+##%% Initialization PowerSupply(volt, current)
+## Creates a framework for a Powersupply, but only binds
+## a reset call to "RST?". All other functions have been
+## left unbound so that children can bind them to respective
+## commands
+##
+## voltage and current default to 10
+##
+    def __init__(self, volt=10, cur=10):
+        Prologix.Prologix_GPIB_USB.__init__(self)
+        self.addCMD("RST?", self.reset)
+
+        self.voltage = volt
+        self.current = cur
+
+##%% reset(pty, args)
+## returns that the device has been reset
+##
+    def reset(self, fpl, args=[]):
+        return "Power Supply has been reset"
+
+##%% version(pty, args)
+## overrides the version function from superclass
+## left unbound here, because it was bound in the
+## superclass.
+##
+    def version(self, fpl, args=[]):
+        return "Power Supply Version 1.GEN"
+
+##%% on(pty, args)
+## turns power supply on
+##
+    def on(self, fpl, args=[]):
+        return self.version(fpl, args) + " in now ON"
+##%% off(pty, args)
+## turns power supply off
+##
+    def off(self, fpl, args=[]):
+        return self.version(fpl, args) + " in now OFF"
+
+##%% getVoltage(pty, args)
+## returns voltage
+##
+    def getVoltage(self, fpl, args=[]):
+        return self.voltage
+
+##%% getCurrent(pty, args)
+## returns current
+##
+    def getCurrent(self, fpl, args=[]):
+        return self.current
+
+
+##%% setVoltage(pty, args)
+## sets voltage
+##
+    def setVoltage(self, fpl, args=[]):
+        try:
+            self.voltage = float(args[0])
+            return ""
+        except:
+            return "ERROR"
+##%% setCurrent(pty, args)
+## sets current
+##
+    def setCurrent(self, fpl, args=[]):
+        try:
+            self.current = float(args[0])
+            return ""
+        except:
+            return "ERROR"
+
+
+##
+## **** E3631A Power Supply Class ****
+## by Aidan Macdonald (aidan.plenert.macdonald@gmail.com)
+## 
+## Emulates the E3631A Power Supply
+## 
+    
+class E3631A(PowerSupply):
+##%% Initialization - E3631A(voltage, current)
+## see PowerSupply.PowerSupply documentation
+## 
+## adds bindings for all of the PowerSupply functions
+##
+    def __init__(self, volt=10, cur=10):
+        PowerSupply.__init__(self, volt, cur)
+
+        self.addCMD("OUTP", self.outp)
+        self.addCMD("MEAS:VOLT:DC", self.getVoltage)
+        self.addCMD("MEAS:CURR:DC", self.getCurrent)
+        self.addCMD("SET:VOLT:DC", self.setVoltage)
+        self.addCMD("SET:CURR:DC", self.setCurrent)
+
+##%% version(pty, args)
+## returns version
+##
+    def version(self, fpl, args=[]):
+        return "E3631A Power Supply"
+
+##%% outp(pty, args)
+## function binding for the "OUTP" command
+## Used to turn the device on and off
+##
+    def outp(self, fpl, args=[]):
+        if args[0] == "ON":
+            return self.on(fpl, args)
+        elif args[0] == "OFF":
+            return self.off(fpl, args)
+        return ""