77 lines
1.6 KiB
Python
77 lines
1.6 KiB
Python
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from __future__ import print_function
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from Interface import Interface
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import sys
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import serial
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import threading
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class SerialInterface(Interface):
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MAX_CHUNK = 32768
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TIMEOUT_SECONDS = 0.15
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owner = None
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port = None
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speed = None
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databits = None
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parity = None
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stopbits = None
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serial = None
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def __init__(self, owner, port, speed, databits, parity, stopbits):
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self.owner = owner
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self.port = port
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self.speed = speed
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self.databits = databits
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self.parity = serial.PARITY_NONE
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self.stopbits = stopbits
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if parity.lower() == "e" or parity.lower() == "even":
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self.parity = serial.PARITY_EVEN
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if parity.lower() == "o" or parity.lower() == "odd":
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self.parity = serial.PARITY_ODD
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try:
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self.serial = serial.Serial(
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port = self.port,
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baudrate = self.speed,
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bytesize = self.databits,
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parity = self.parity,
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stopbits = self.stopbits,
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timeout = SerialInterface.TIMEOUT_SECONDS,
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xonxoff = False,
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rtscts = False,
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write_timeout = None,
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dsrdtr = False,
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)
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print(self.serial.inter_byte_timeout)
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except Exception as e:
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print("Could not create serial port", file=sys.stderr)
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raise e
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#self.serial.open()
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if self.serial.is_open:
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thread = threading.Thread(target=self.readLoop)
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thread.setDaemon(True)
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thread.start()
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else:
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raise IOError("Could not open serial port")
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def processIncoming(self, data):
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self.owner.__class__.incoming(data)
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def processOutgoing(self,data):
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self.serial.write(data)
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def readLoop(self):
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while self.serial.is_open:
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data = self.serial.read(size=self.owner.__class__.MTU)
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if not data == "":
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self.processIncoming(data)
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