helloworld.py
9f2fba144c8fmaster

helloworld.py
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			#!/usr/bin/python
			# -- coding: utf-8 --
			import os, sys

			# add ../../Sources to the PYTHONPATH
			sys.path.append(os.path.join("..", "..", "Sources"))
			from yocto_api import *
			from yocto_voltage import *


			def usage():
			scriptname = os.path.basename(sys.argv[0])
			print("Usage:")
			print(scriptname + ' <serial_number>')
			print(scriptname + ' <logical_name>')
			print(scriptname + ' any ')
			sys.exit()


			def die(msg):
			sys.exit(msg + ' (check USB cable)')


			errmsg = YRefParam()

			if len(sys.argv) < 2:
			usage()

			target = sys.argv[1]

			# Setup the API to use local USB devices
			if YAPI.RegisterHub("usb", errmsg) != YAPI.SUCCESS:
			sys.exit("init error" + errmsg.value)

			if target == 'any':
			# retreive any voltage sensor
			sensor = YVoltage.FirstVoltage()
			if sensor is None:
			die('No module connected')
			m = sensor.get_module()
			target = m.get_serialNumber()

			sensorDC = YVoltage.FindVoltage(target + '.voltage1')
			sensorAC = YVoltage.FindVoltage(target + '.voltage2')

			if not (sensorDC.isOnline()):
			die('device not connected')

			while sensorDC.isOnline():
			print("Voltage : %3.2fV DC / %3.2fV AC (Ctrl-C to stop) " % \
			(sensorDC.get_currentValue(), sensorAC.get_currentValue()))
			YAPI.Sleep(1000)
			YAPI.FreeAPI()