--- /dev/null
+#!/usr/bin/env python
+
+###################################
+# python Digital Multimeter App
+# (C) Andrew Tridgell 2011
+# Released under GNU GPLv3 or later
+
+from dmmui import *
+from dmmread import *
+import sys
+
+def tick():
+ '''update display'''
+ global device
+ global tickcount
+ try:
+ v = device.read()
+ ui.LCD.display(v.lcd)
+ if v.units:
+ ui.units.setText(v.units)
+ else:
+ ui.units.setText("-")
+ if v.mode:
+ ui.mode.setText(v.mode)
+ else:
+ ui.mode.setText("")
+ if tickcount & 1:
+ ui.tick.setText('*')
+ else:
+ ui.tick.setText(' ')
+ tickcount += 1
+ except DMMTimeout:
+ pass
+ except DMMDataError, msg:
+ print("DMM Data Error: %s" % msg)
+ except KeyboardInterrupt:
+ sys.exit(1)
+
+
+############################################
+# main program
+if __name__ == "__main__":
+ global device, tickcount
+
+ device = DMM_Victor86B()
+ tickcount = 0
+
+ app = QtGui.QApplication(sys.argv)
+ dmm = QtGui.QMainWindow()
+ ui = Ui_DMMUI()
+ ui.setupUi(dmm)
+
+ ctimer = QtCore.QTimer()
+ QtCore.QObject.connect(ctimer, QtCore.SIGNAL("timeout()"), tick)
+ ctimer.start(1)
+
+ dmm.show()
+ sys.exit(app.exec_())
--- /dev/null
+#!/usr/bin/env python
+
+###################################
+# python Digital Multimeter App
+# (C) Andrew Tridgell 2011
+# Released under GNU GPLv3 or later
+
+import usb
+
+class DMMException(Exception):
+ '''an exception class for DMM errors'''
+ def __init__(self, message):
+ Exception.__init__(self, message)
+
+class DMMDeviceError(DMMException):
+ def __init__(self, message):
+ DMMException.__init__(self, message)
+
+class DMMTimeout(DMMDeviceError):
+ def __init__(self, message):
+ DMMDeviceError.__init__(self, "timeout")
+
+class DMMDataError(DMMException):
+ def __init__(self, message):
+ DMMException.__init__(self, message)
+
+class DMMData(object):
+ '''a piece of data from a DMM'''
+ def __init__(self):
+ self.rawData = None
+ self.model = "Unknown"
+ self.fields = {}
+ self.lcd = None
+ self.units = None
+ self.mode = None
+ pass
+
+class DMM(object):
+ '''generic USB multimeter class'''
+ def __init__(self, idVendor, idProduct, idEndpoint,
+ idInterface=0, model="Unknown", readSize=32):
+ for bus in usb.busses():
+ for device in bus.devices:
+ if device.idVendor == idVendor and device.idProduct == idProduct:
+ self.device = device
+ self.handle = device.open()
+ try:
+ self.handle.detachKernelDriver(idInterface)
+ except usb.USBError:
+ pass
+ self.handle.claimInterface(idInterface)
+ self.model = model
+ self.readSize = readSize
+ self.idEndpoint = idEndpoint
+ self.debug = False
+ return
+ raise DMMDeviceError("Unable to find USB device 0x%04x:0x%04x" % (
+ idVendor, idProduct, idInterface))
+
+ def read(self):
+ '''read a set of data'''
+ ret = DMMData()
+ try:
+ data = self.handle.interruptRead(self.idEndpoint, self.readSize)
+ ret.rawData = data;
+ if self.debug:
+ for d in ret.rawData:
+ print("%02X " % d),
+ print
+ for i in range(0,len(ret.rawData)):
+ print("%2d " % i),
+ print
+ except usb.USBError, e:
+ if str(e).find("No data available"):
+ raise DMMTimeout(e)
+ raise DMMDeviceError(e)
+ return ret
+
+
+class DMM_Victor86B(DMM):
+ '''DMM interface for a Victor 86B'''
+ def __init__(self):
+ DMM.__init__(self, idVendor=0x1244, idProduct=0xd237,
+ idEndpoint=0x81, idInterface=0,
+ model="Victor86B")
+ def read(self):
+ tries = 4
+ while tries > 0:
+ tries -= 1
+ ret = DMM.read(self)
+ if len(ret.rawData) != 14:
+ continue
+ if ret.rawData[11:14] == ( 0, 0, 0):
+ continue
+ break
+ if tries == 0:
+ raise DMMDataError("Bad DMM data: %s" % ret.rawData)
+ digmap = { 0x42: '0', 0x61: '1', 0x04: '2', 0xE6: '3', 0xA5: '4', 0x2E: '5',
+ 0x4E: '6', 0xE1: '7', 0x46: '8', 0x26: '9', 0x67: ' ', 0xC8: 'L' }
+ units = { (0x8F, 0x6E, 0xAc) : "Hz",
+ (0xBF, 0x6E, 0x6C) : "C",
+ (0x8F, 0x6E, 0x8C) : "V",
+ (0x8F, 0x6E, 0x6C) : "Ohm",
+ (0x8F, 0xAE, 0x6C) : "kOhm",
+ (0x8F, 0x7E, 0x7C) : "uA",
+ (0x8F, 0x6E, 0x7C) : "A",
+ }
+ v = [(ret.rawData[10] & 0xF0) | (ret.rawData[3]>>4),
+ (ret.rawData[9] & 0xF0) | (ret.rawData[6]>>4),
+ (ret.rawData[7] & 0xF0) | (ret.rawData[5]>>4),
+ (ret.rawData[0] & 0xF0) | (ret.rawData[2]>>4)]
+ offsets = [ 0, 0, 0xEF, 0x01 ]
+ ret.lcd = ""
+ for i in range(0,4):
+ val = v[i]
+ val += offsets[i]
+ val &= 0xFF
+ if val & 0x10:
+ if i == 0:
+ ret.lcd += "-"
+ else:
+ ret.lcd += "."
+ val &= 0xEF
+ if not val in digmap:
+ raise DMMDataError("Digit %d invalid value 0x%02X" % (i+1, val))
+ else:
+ ret.lcd += digmap[val]
+ ret.mode = ""
+ u = (ret.rawData[11], ret.rawData[12], ret.rawData[13])
+ if u in units:
+ ret.units = units[u]
+ if ret.rawData[1] == 0x47 and ret.rawData[4] == 0x71:
+ ret.mode = "AC"
+ if ret.rawData[1] == 0x57 and ret.rawData[4] == 0x71:
+ ret.mode = "DC"
+ return ret
+
+
+############################################
+# main program
+if __name__ == "__main__":
+ import sys
+
+ dmm = DMM_Victor86B()
+ dmm.debug = True
+ while True:
+ try:
+ v = dmm.read()
+ print("%s %s" % (v.lcd, v.units))
+ except DMMTimeout:
+ pass
+ except DMMDataError, msg:
+ print("DMM Data Error: %s" % msg)
+ except KeyboardInterrupt:
+ sys.exit(1)
+
--- /dev/null
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>DMMUI</class>
+ <widget class="QMainWindow" name="DMMUI">
+ <property name="geometry">
+ <rect>
+ <x>0</x>
+ <y>0</y>
+ <width>489</width>
+ <height>325</height>
+ </rect>
+ </property>
+ <property name="windowTitle">
+ <string>Digital Multimeter</string>
+ </property>
+ <widget class="QWidget" name="centralwidget">
+ <widget class="QWidget" name="gridLayoutWidget">
+ <property name="geometry">
+ <rect>
+ <x>0</x>
+ <y>40</y>
+ <width>411</width>
+ <height>261</height>
+ </rect>
+ </property>
+ <layout class="QGridLayout" name="gridLayout">
+ <item row="1" column="0">
+ <widget class="QLCDNumber" name="LCD">
+ <property name="sizePolicy">
+ <sizepolicy hsizetype="Minimum" vsizetype="Minimum">
+ <horstretch>0</horstretch>
+ <verstretch>0</verstretch>
+ </sizepolicy>
+ </property>
+ <property name="smallDecimalPoint">
+ <bool>true</bool>
+ </property>
+ <property name="numDigits">
+ <number>5</number>
+ </property>
+ <property name="digitCount">
+ <number>5</number>
+ </property>
+ <property name="mode">
+ <enum>QLCDNumber::Dec</enum>
+ </property>
+ <property name="segmentStyle">
+ <enum>QLCDNumber::Filled</enum>
+ </property>
+ <property name="value" stdset="0">
+ <double>12.340000000000000</double>
+ </property>
+ </widget>
+ </item>
+ </layout>
+ </widget>
+ <widget class="QWidget" name="verticalLayoutWidget">
+ <property name="geometry">
+ <rect>
+ <x>410</x>
+ <y>40</y>
+ <width>71</width>
+ <height>261</height>
+ </rect>
+ </property>
+ <layout class="QVBoxLayout" name="verticalLayout">
+ <item>
+ <widget class="QLabel" name="units">
+ <property name="font">
+ <font>
+ <family>Courier 10 Pitch</family>
+ <pointsize>20</pointsize>
+ </font>
+ </property>
+ <property name="text">
+ <string/>
+ </property>
+ </widget>
+ </item>
+ </layout>
+ </widget>
+ <widget class="QWidget" name="horizontalLayoutWidget">
+ <property name="geometry">
+ <rect>
+ <x>-2</x>
+ <y>0</y>
+ <width>411</width>
+ <height>41</height>
+ </rect>
+ </property>
+ <layout class="QHBoxLayout" name="horizontalLayout">
+ <item>
+ <widget class="QLabel" name="mode">
+ <property name="font">
+ <font>
+ <family>Courier 10 Pitch</family>
+ <pointsize>20</pointsize>
+ </font>
+ </property>
+ <property name="text">
+ <string/>
+ </property>
+ </widget>
+ </item>
+ </layout>
+ </widget>
+ <widget class="QWidget" name="horizontalLayoutWidget_2">
+ <property name="geometry">
+ <rect>
+ <x>409</x>
+ <y>0</y>
+ <width>127</width>
+ <height>41</height>
+ </rect>
+ </property>
+ <layout class="QHBoxLayout" name="horizontalLayout_2">
+ <item>
+ <widget class="QLabel" name="tick">
+ <property name="text">
+ <string/>
+ </property>
+ </widget>
+ </item>
+ </layout>
+ </widget>
+ </widget>
+ <widget class="QStatusBar" name="statusbar"/>
+ </widget>
+ <resources/>
+ <connections/>
+</ui>
git.samba.org / tridge / junkcode.git / commitdiff