|
| 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 ([email protected]) |
| 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:] |
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