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helloworld.py
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Fri, Nov 29, 00:00

helloworld.py

#!/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_temperature 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 temperature sensor
sensor = YTemperature.FirstTemperature()
if sensor is None:
die('No module connected')
else:
sensor = YTemperature.FindTemperature(target + '.temperature1')
if not (sensor.isOnline()):
die('device not connected')
# retreive module serial
serial = sensor.get_module().get_serialNumber()
# retreive both channels
channel1 = YTemperature.FindTemperature(serial + '.temperature1')
channel2 = YTemperature.FindTemperature(serial + '.temperature2')
while channel1.isOnline():
print("channel 1/2: " + "%2.1f / " % channel1.get_currentValue() + \
"%2.1f" % channel2.get_currentValue() + \
" deg C (Ctrl-C to stop)")
YAPI.Sleep(1000)
YAPI.FreeAPI()

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