connectors/LPC/LPCProto.py
author edouard
Wed, 23 Feb 2011 16:54:29 +0100
changeset 578 6f5795bdee49
parent 576 7fcdc0d3d8d9
permissions -rw-r--r--
Making debugger more stable with LPC
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import serial
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import exceptions
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from threading import Lock
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import time
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class LPCProtoError(exceptions.Exception):
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        """Exception class"""
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        def __init__(self, msg):
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                self.msg = msg
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        def __str__(self):
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                return "Exception in PLC protocol : " + str(self.msg)
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class LPCProto:
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    def __init__(self, port, rate, timeout):
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        # serialize access lock
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        self.TransactionLock = Lock()
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        if BMZ_DBG:
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            # Debugging serial stuff
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            self._serialPort = serial.Serial( port, rate, timeout = timeout, writeTimeout = timeout )
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            class myser:
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                def readline(self_):
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                    res = self._serialPort.readline() 
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                    print 'Recv :"', res, '"' 
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                    return res
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                def read(self_,cnt):
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                    res = self._serialPort.read(cnt)
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                    if len(res) > 16:
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                        print "Recv :", map(hex,map(ord,res[:16])), "[...]"
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                    else:
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                        print "Recv :", map(hex,map(ord,res))
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                    return res
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                def write(self_, string):
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                    lstr=len(string)
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                    if lstr > 16:
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                        print "Send :", map(hex,map(ord,string[:16])), "[...]"
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                    else:
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                        print "Send :", map(hex,map(ord,string))
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                    return self._serialPort.write(string)
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                    # while len(string)>0:
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                    #     i = self._serialPort.write(string[:4096])
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                    #     print ".",
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                    #     string = string[i:]
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                    # print
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                    #return lstr
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                def flush(self_):
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                    return self._serialPort.flush()
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                def close(self_):
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                    self._serialPort.close()
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            self.serialPort = myser()
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        else:
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            # open serial port
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            self.serialPort = serial.Serial( port, rate, timeout = timeout )
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        # start with empty buffer
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        self.serialPort.flush()
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    def __del__(self):
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        if self.serialPort:
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            self.serialPort.close()
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    def close(self):
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        self.serialPort.close()
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        self.serialPort = None