lpcmanager

Smarteh 485: slave address of RX buffer must match the address of sent TX buffer in order to be accepted. If reception is not successful data is not copied to beremiz buffer (memcpy()).

2017-05-16, bmakuc
802091036e67
Smarteh 485: slave address of RX buffer must match the address of sent TX buffer in order to be accepted. If reception is not successful data is not copied to beremiz buffer (memcpy()).
import serial
import exceptions
from threading import Lock
import time
class LPCProtoError(exceptions.Exception):
"""Exception class"""
def __init__(self, msg):
self.msg = msg
def __str__(self):
return "Exception in PLC protocol : " + str(self.msg)
class LPCProto:
def __init__(self, port, rate, timeout):
# serialize access lock
if BMZ_DBG:
# Debugging serial stuff
self._serialPort = serial.Serial( port, rate, timeout = timeout, writeTimeout = timeout )
class myser:
def readline(self_):
res = self._serialPort.readline()
print 'Recv :"', res, '"'
return res
def read(self_,cnt):
res = self._serialPort.read(cnt)
if len(res) > 16:
print "Recv :", map(hex,map(ord,res[:16])), "[...]"
else:
print "Recv :", map(hex,map(ord,res))
return res
def write(self_, string):
lstr=len(string)
if lstr > 16:
print "Send :", map(hex,map(ord,string[:16])), "[...]"
else:
print "Send :", map(hex,map(ord,string))
return self._serialPort.write(string)
# while len(string)>0:
# i = self._serialPort.write(string[:4096])
# print ".",
# string = string[i:]
# print
#return lstr
def flush(self_):
return self._serialPort.flush()
def close(self_):
self._serialPort.close()
self.serialPort = myser()
else:
# open serial port
self.serialPort = serial.Serial( port, rate, timeout = timeout )
# start with empty buffer
self.serialPort.flush()
def __del__(self):
if self.serialPort:
self.serialPort.close()
def close(self):
self.serialPort.close()
self.serialPort = None