Mac/Lib/mactty.py

   1 #
   2 # mactty module - Use a terminal line as communications channel.
   3 #
   4 # Note that this module is not very complete or well-designed, but it
   5 # will have to serve until I have time to write something better. A unix
   6 # module with the same API is available too, contact me (jack@cwi.nl)
   7 # if you need it.
   8 #
   9 # Usage:
  10 # t = Tty(toolname)
  11 # t.raw()               Set in raw/no-echo mode
  12 # t.baudrate(rate)      Set baud rate
  13 # t.reset()             Back to normal
  14 # t.read(len)           Read up to 'len' bytes (but often reads less)
  15 # t.readall(len)        Read 'len' bytes
  16 # t.timedread(len,tout) Read upto 'len' bytes, or until 'tout' seconds idle
  17 # t.getmode()           Get parameters as a string
  18 # t.setmode(args)       Set parameters
  19 #
  20 # Jack Jansen, CWI, January 1997
  21 #
  22 import ctb
  23 DEBUG=1
  24
  25 class Tty:
  26         def __init__(self, name=None):
  27                 self.connection = ctb.CMNew('Serial Tool', (10000, 10000, 0, 0, 0, 0))
  28                 #self.orig_data = self.connection.GetConfig()
  29                 #if name:
  30                 #       self.connection.SetConfig(self.orig_data + ' Port "%s"'%name)
  31                 self.connection.Open(10)
  32                 sizes, status = self.connection.Status()
  33
  34         def getmode(self):
  35                 return self.connection.GetConfig()
  36
  37         def setmode(self, mode):
  38                 length = self.connection.SetConfig(mode)
  39                 if length != 0 and length != len(mode):
  40                         raise 'SetConfig Error', (mode[:length], mode[length:])
  41
  42         def raw(self):
  43                 pass
  44
  45         def baudrate(self, rate):
  46                 self.setmode(self.getmode()+' baud %d'%rate)
  47
  48         def reset(self):
  49                 self.setmode(self.orig_data)
  50
  51         def readall(self, length):
  52                 data = ''
  53                 while len(data) < length:
  54                         data = data + self.read(length-len(data))
  55                 return data
  56
  57         def timedread(self,length, timeout):
  58                 self.connection.Idle()
  59                 data, eom = self.connection.Read(length, ctb.cmData, timeout*10)
  60                 if DEBUG:
  61                         print 'Timedread(%d, %d)->%s'%(length, timeout, `data`)
  62                 return data
  63
  64         def read(self, length):
  65                 return self.timedread(length, 0x3fffffff)
  66
  67         def write(self, data):
  68                 if DEBUG:
  69                         print 'Write(%s)'%`data`
  70                 while data:
  71                         self.connection.Idle()
  72                         done = self.connection.Write(data, ctb.cmData, 0x3fffffff, 0)
  73                         self.connection.Idle()
  74                         data = data[done:]