1 files changed, 173 insertions, 0 deletions
diff --git a/monitor_supply.py b/monitor_supply.py
new file mode 100755
index 0000000..c5b085a
--- /dev/null
+++ b/monitor_supply.py
@@ -0,0 +1,173 @@
+#!/usr/bin/env python
+#
+# agilent66332Adriver.py
+#
+# Agilent 66332A power supply driver
+#
+
+import serial, time, sys, os
+
+class agilent66332Adriver():
+    def __init__(self, ttyport):
+        self.port = ttyport
+
+    def open(self):
+        try:
+            self.serialPort = serial.Serial(self.port, 9600, timeout=2, writeTimeout=2, bytesize=8, parity='N', stopbits=1, xonxoff=0, rtscts=1)
+        except ValueError:
+            print "!!! Error: parameter are out of range"
+            raise ValueError
+        except serial.SerialException:
+            print "!!! Error: the device can not be found or can not be configured"
+            raise serial.SerialException
+        except Exception as e:
+            raise e
+
+    def close(self):
+        self.serialPort.flushOutput()
+        self.serialPort.flushInput()
+        self.serialPort.close()
+
+    def sendCmd(self, cmd, read=False):
+        output = ""
+        try:
+            self.serialPort.write(cmd+"\n")
+            while read == True:
+                line = self.serialPort.readline()
+                if not line:
+                    break;
+                if cmd == line.rstrip():
+                    continue
+                else:
+                    output=output+line
+                    break;
+        except ValueError:
+            print "!!! Error: closed port"
+            raise ValueError
+        except serial.SerialTimeoutException:
+            print "!!! Error: write timeout"
+            raise serial.SerialTimeoutException
+        except Exception as e:
+            raise e
+
+        return output
+
+
+    def reset(self):
+        try:
+            self.sendCmd("*RST")
+        except Exception as e:
+            raise e
+
+    def getId(self):
+        value = '-1.0'
+        try:
+            value = self.sendCmd("*IDN?", read=True).rstrip()
+        except Exception as e:
+            raise e
+
+        return (value)
+
+    # Configure output voltage
+    def setOutputVolt(self, volt):
+        try:
+            self.sendCmd("VOLT %s"%volt)
+        except Exception as e:
+            raise e
+
+    # Configure output current
+    def setOutputCurrent(self, current):
+        try:
+            self.sendCmd("CURR %s"%current)
+        except Exception as e:
+            raise e
+
+    # Enable output
+    def setOutputState(self, state):
+        if (not state == "ON" and not state == "OFF"):
+            raise ValueError
+        try:
+            self.sendCmd("OUTP %s"%state)
+        except Exception as e:
+            raise e
+
+    def configMeasure(self, period=15.6, size=4096):
+        
+        interval = '%2.1f' % period + "E-6"
+        print "setting interval to "+interval+" with "+str(size)+" samples"
+        try:
+            self.sendCmd("SENS:SWE:TINT %s"%interval)
+            self.sendCmd("SENS:SWE:POIN %s"%size)
+        except Exception as e:
+            raise e
+
+        pass
+
+    def readCurrent(self):
+        value = '-1.0'
+        try:
+            value = self.sendCmd("MEAS:CURR?", read=True).rstrip()
+        except Exception as e:
+            raise e
+
+        return (float(value))
+
+    def readVoltage(self):
+        value = '-1.0'
+        try:
+            value = self.sendCmd("MEAS:VOLT?", read=True).rstrip()
+        except Exception as e:
+            raise e
+
+        return (float(value))
+
+    def readCurrentBuffer(self):
+        array = '0'
+        try:
+            array = self.sendCmd("MEAS:ARR:CURR?", read=True).rstrip()
+        except Exception as e:
+            raise e
+        list_current = array.split(",")
+        return list_current
+
+    def writeBuffer(self, outfile, list_current, period=15.6):
+        try:
+            fo = open(outfile, "w+")
+        except IOError:
+            print "WARN: Unable to open %s", outfile
+            sys.exit(2)
+
+        myline="Time I_supply\n"
+        fo.write(myline)
+        
+        time = 0
+        for value in list_current:
+            myline = str(int(time))+" "+str(int(float(value)*1000000))+"\n"
+            time += period
+                      
+            fo.write(myline)
+
+        fo.close()
+
+        return
+
+
+if __name__ == '__main__':
+    period = 400
+    # simple interactive demo/test
+    driver=agilent66332Adriver('/dev/ttyUSB0')
+    driver.open()
+    print driver.getId()
+    driver.reset()
+    driver.configMeasure(period, 4096)
+    driver.setOutputVolt("5")
+    driver.setOutputCurrent("4.0")
+    driver.setOutputState("ON")
+    print driver.readCurrent()
+    print driver.readVoltage()
+
+    raw_input("Press Enter to continue...")
+    
+#    driver.writeBuffer("tmp.txt", driver.readCurrentBuffer(), period)
+    driver.close()
+