analgauge.py

Fri, 17 Feb 2017 13:40:27 +0100

author
mbayer
date
Fri, 17 Feb 2017 13:40:27 +0100
changeset 7
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parent 6
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permissions
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final pics

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1 """
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2 Simple CPU load Display
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3
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4 On Linux simply run with
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5 python analgauge.py &
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6
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7 On Windows:
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8 Make sure to install libusb-win32-devel-filter-1.2.6.0.exe
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9 from here: https://sourceforge.net/projects/libusb-win32/files/libusb-win32-releases/1.2.6.0/
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10 Then assign a filter to the connected device matching VENDOR_ID and PRODUCT_ID
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11
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12 pythonw.exe analgauge.py
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13 """
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14 import usb.core
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15 from psutil import cpu_percent
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16 from time import sleep
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17 from random import random
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18 from sys import exit, platform
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19
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20 #VALUE_MIN = 0x00 # TODO
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21 VALUE_MAX = 0x78
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22
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23 VENDOR_ID = 0x16c0
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24 PRODUCT_ID = 0x05df
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25
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26 class AnalGauge:
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27 def __init__(self):
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28 self.dev = usb.core.find(
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29 idVendor = VENDOR_ID,
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30 idProduct = PRODUCT_ID
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31 )
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32 if not self.dev:
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33 print "AnalGauge Device not found!"
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34 exit(1)
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35 self.dev.set_configuration()
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36
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37 def update(self, d):
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38 try:
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39 data = [int(d)]
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40 result = self.dev.ctrl_transfer(
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41 0x21, 0x9,
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42 wValue = 0x200, wIndex = 0x00,
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43 data_or_wLength = data
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44 )
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45 except usb.core.USBError, e:
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46 if platform == "linux":
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47 self.dev.detach_kernel_driver(0)
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48 else:
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49 exit(1)
1
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50 print(e)
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51
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52 if __name__ == "__main__":
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53 g = AnalGauge()
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54
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55 #g.update(VALUE_MAX)
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56 #exit()
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57
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58 #while True:
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59 # g.update(random() * VALUE_MAX)
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60 # sleep(0.5)
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61
1
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62 while True:
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63 pct = cpu_percent(interval=1)
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64 g.update((VALUE_MAX * pct)/100)

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