from abstract_instrument import abstract_instrument
  import socket
  
  #==============================================================================

  ALL_VAL_TYPE = ['FREQ']  #, 'PERIOD']
  ALL_CHANNELS = ['1'] #, '2']

  
  ADRESS = "192.168.0.52"

  CONF_VAL_TYPE = ['CONF:FREQ'] #, 'CONF:PERIOD']

  
  #==============================================================================
  
  class HP53132A(abstract_instrument):
      def __init__(self, channels, vtypes, adress):
          self.adress = adress
          self.port = 1234
          self.gpib_addr = 12
          self.channels = channels
          self.vtypes = vtypes
  
      def model(self):
          #self.send("*IDN?")
          #return self.read()
          return "HP53132A"
  
      def connect(self):
          print('Connecting to device @%s:%s...' %(self.adress, self.port))
          self.sock = socket.socket(socket.AF_INET,
                               socket.SOCK_STREAM,
                               socket.IPPROTO_TCP)
          self.sock.settimeout(10.0)    # Don't hang around forever
          self.sock.connect((self.adress, self.port))
          self.init_prologix()
          print('  --> Ok')
          print(self.model())
          self.configure()
  
      def configure(self):
          self.strCh = ''
          for ch in self.channels:

              self.send('%s (@%s)'%(CONF_VAL_TYPE[ALL_VAL_TYPE.index(self.vtypes[self.channels.index(ch)])], ch))
              self.strCh = self.strCh + '(@%s),'%ch

          self.strCh = self.strCh[0:-1]

          self.send('FORMAT ASCII')
  
          #self.send('ROUT:SCAN (@%s)'%self.strCh)
          #self.send('TRIG:COUN 1')
          self.send('*RST')

          self.send(":FUNC 'FREQ 1'")
          self.send(":ROSC:SOUR INT")
          self.send(":INIT:CONT ON")

  
      def getValue(self):

          self.send('FETC?')

          return self.read()
  
      def read(self):
          self.send("++read eoi")
          ans = ''
          nb_data_list = []
          nb_data = ''
          try:
              while ans != '
  ':
                  ans = self.sock.recv(1)
                  nb_data_list.append(ans) # Return the number of data
              list_size = len(nb_data_list)
              for j in range (0, list_size):
                  nb_data = nb_data+nb_data_list[j]
              return nb_data
          except socket.timeout:
              print "Socket timeout error when reading."
              raise
  
      def disconnect(self):
          self.send('*RST')
          self.sock.close()
  
      def send(self, command):
          self.sock.send("%s
  "%command)
  
      def init_prologix(self):
          try:
              self.sock.send("++mode 1
  ") # Set mode as CONTROLLER
              self.sock.send('++addr ' + str(self.gpib_addr) + '
  ') # Set the GPIB address
              self.sock.send('++eos 3
  ') # Set end-of-send character to nothing
              self.sock.send("++eoi 1
  ") # Assert EOI with last byte to indicate end
              self.sock.send("++read_tmo_ms 2750
  ") # Set read timeout
              self.sock.send("++auto 0
  ") # Turn off read-after-write to avoid
                                  # "Query Unterminated" errors
  
          except self.socket.timeout:
              print "Socket timeout"
              raise
          except self.socket.error as er:
              print "Socket error: " + str(er)
              raise
          except Exception as er:
              print "Unexpected error: " + str(er)
              raise