LPCconnector/LPCProto.py
author Drauoude Tnaressit
Tue, 19 Mar 2013 17:22:27 +0900
changeset 29 86fb7dc2b54e
parent 0 51f5a3138405
child 45 786b12887e91
permissions -rw-r--r--
Untested support for logging
0
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
     1
import serial
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
     2
import exceptions
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
     3
from threading import Lock
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
     4
import time
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
     5
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
     6
class LPCProtoError(exceptions.Exception):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
     7
        """Exception class"""
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
     8
        def __init__(self, msg):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
     9
                self.msg = msg
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    10
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    11
        def __str__(self):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    12
                return "Exception in PLC protocol : " + str(self.msg)
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    13
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    14
class LPCProto:
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    15
    def __init__(self, port, rate, timeout):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    16
        # serialize access lock
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    17
        self.TransactionLock = Lock()
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    18
        if BMZ_DBG:
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    19
            # Debugging serial stuff
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    20
            self._serialPort = serial.Serial( port, rate, timeout = timeout, writeTimeout = timeout )
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    21
            class myser:
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    22
                def readline(self_):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    23
                    res = self._serialPort.readline() 
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    24
                    print 'Recv :"', res, '"' 
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    25
                    return res
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    26
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    27
                def read(self_,cnt):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    28
                    res = self._serialPort.read(cnt)
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    29
                    if len(res) > 16:
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    30
                        print "Recv :", map(hex,map(ord,res[:16])), "[...]"
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    31
                    else:
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    32
                        print "Recv :", map(hex,map(ord,res))
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    33
                        
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    34
                    return res
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    35
                def write(self_, string):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    36
                    lstr=len(string)
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    37
                    if lstr > 16:
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    38
                        print "Send :", map(hex,map(ord,string[:16])), "[...]"
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    39
                    else:
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    40
                        print "Send :", map(hex,map(ord,string))
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    41
                    return self._serialPort.write(string)
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    42
                    # while len(string)>0:
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    43
                    #     i = self._serialPort.write(string[:4096])
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    44
                    #     print ".",
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    45
                    #     string = string[i:]
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    46
                    # print
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    47
                    #return lstr
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    48
                def flush(self_):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    49
                    return self._serialPort.flush()
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    50
                def close(self_):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    51
                    self._serialPort.close()
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    52
            self.serialPort = myser()
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    53
        else:
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    54
            # open serial port
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    55
            self.serialPort = serial.Serial( port, rate, timeout = timeout )
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    56
        # start with empty buffer
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    57
        self.serialPort.flush()
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    58
    
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    59
    def __del__(self):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    60
        if self.serialPort:
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    61
            self.serialPort.close()
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    62
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    63
    def close(self):
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    64
        self.serialPort.close()
51f5a3138405 Initial commit, LPC files taken out of beremiz revision 915be999f3f0
Edouard Tisserant
parents:
diff changeset
    65
        self.serialPort = None