#
# 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:]
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