Module to use Mac serial port as a communication link

Mac/Lib/mactty.py

+#
+# mactty module - Use a terminal line as communications channel.
+#
+# Note that this module is not very complete or well-designed, but it
+# will have to serve until I have time to write something better. A unix
+# module with the same API is available too, contact me (jack@cwi.nl)
+# if you need it.
+#
+# Usage:
+# t = Tty(toolname)
+# t.raw()		Set in raw/no-echo mode
+# t.baudrate(rate)	Set baud rate
+# t.reset()		Back to normal
+# t.read(len)		Read up to 'len' bytes (but often reads less)
+# t.readall(len)	Read 'len' bytes
+# t.timedread(len,tout)	Read upto 'len' bytes, or until 'tout' seconds idle
+# t.getmode()		Get parameters as a string
+# t.setmode(args)	Set parameters
+#
+# Jack Jansen, CWI, January 1997
+#
+import ctb
+DEBUG=1
+
+class Tty:
+	def __init__(self, name=None):
+		self.connection = ctb.CMNew('Serial Tool', (10000, 10000, 0, 0, 0, 0))
+		#self.orig_data = self.connection.GetConfig()
+		#if name:
+		#	self.connection.SetConfig(self.orig_data + ' Port "%s"'%name)
+		self.connection.Open(10)
+		sizes, status = self.connection.Status()
+
+	def getmode(self):
+		return self.connection.GetConfig()
+
+	def setmode(self, mode):
+		length = self.connection.SetConfig(mode)
+		if length != 0 and length != len(mode):
+			raise 'SetConfig Error', (mode[:length], mode[length:])
+		
+	def raw(self):
+		pass
+		
+	def baudrate(self, rate):
+		self.setmode(self.getmode()+' baud %d'%rate)
+
+	def reset(self):
+		self.setmode(self.orig_data)
+
+	def readall(self, length):
+		data = ''
+		while len(data) < length:
+			data = data + self.read(length-len(data))
+		return data
+
+	def timedread(self,length, timeout):
+		self.connection.Idle()
+		data, eom = self.connection.Read(length, ctb.cmData, timeout*10)
+		if DEBUG:
+			print 'Timedread(%d, %d)->%s'%(length, timeout, `data`)
+		return data
+		
+	def read(self, length):
+		return self.timedread(length, 0x3fffffff)
+		
+	def write(self, data):
+		if DEBUG:
+			print 'Write(%s)'%`data`
+		while data:
+			self.connection.Idle()
+			done = self.connection.Write(data, ctb.cmData, 0x3fffffff, 0)
+			self.connection.Idle()
+			data = data[done:]