from abstract_instrument import abstract_instrument
  import os
  
  #==============================================================================
  
  ALL_VAL_TYPE = ['PWR']
  ALL_CHANNELS = ['1']

  ADDRESS = "/dev/usbtmc0"

  CONF_VAL_TYPE = ['PWR']
  
  #==============================================================================
  
  class PM100D(abstract_instrument):

      def __init__(self, channels, vtypes, address):
          self.address = address

          self.channels = channels

          self.vtypes = vtypes
  
      def model(self):
          #self.send("*IDN?")
          #return self.read()

          return "PM100D"

  
      def connect(self):

          print('Connecting to device @%s...' %(self.address))
          self.FILE = os.open(self.address, os.O_RDWR)

          print('  --> Ok')
          print(self.model())

          self.configure()

  
      def configure(self):

          pass

  
      def getValue(self):
          self.send("READ?")
          return self.read()
  
      def read(self):
          return os.read(self.FILE, 300)
  
      def disconnect(self):
          self.send('*RST')
  
      def send(self, command):
          os.write(self.FILE, command)