lcd

lcd.py

#/usr/bin/python

#
# Written for PyUSB 1.0 (w/libusb 1.0.3)
#


import usb, sys # 1.0 not 0.4
import time
import psutil

sys.path.append("..")

from arduino.usbdevice import ArduinoUsbDevice


def updateLcd(lines):
  theDevice.write(0xf2)
  for line in lines:
    for ch in line:
      theDevice.write(ord(ch))
    for i in range(0, 16 - len(line)):
      theDevice.write(ord(' '))
    theDevice.write(ord('\n'))

def setBacklight(v):
  if (v) :
    theDevice.write(0xf1)
  else :
    theDevice.write(0xf0)

try:
  theDevice = ArduinoUsbDevice(idVendor=0x16c0, idProduct=0x05df)
except:
  sys.exit("No DigiUSB Device Found")
  

setBacklight(1)
while True:
  time.sleep(5)
  cpuUsage = int(psutil.cpu_percent(interval=None))
  mem = psutil.virtual_memory()
  memUsage = int(mem.used / float(mem.total) * 100)
  cpuUsage = min(cpuUsage, 99)
  memUsage = min(memUsage, 99)
  updateLcd(["CPU:%2d%%  Mem:%2d%%" % (cpuUsage, memUsage), time.strftime("%m-%d %H:%M %a", time.localtime())])