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