Python 串口设备应用
1. Python 串口设备应用
简述
1.1. 线程轮寻
风尘无限 <tianyu263@163.com>
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就是打开串口后，启动一个线程来监听串口数据的进入，有数据时，就做数据的处理（也可以发送一个事件，并携带接收到的数据）。
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1
2 #coding=gb18030
3
4 import sys,threading,time;
5 import serial;
6 import binascii,encodings;
7 import re;
8 import socket;
9
10 class ReadThread:
11 def __init__(self, Output=None, Port=0, Log=None, i_FirstMethod=True):
12 self.l_serial = None;
13 self.alive = False;
14 self.waitEnd = None;
15 self.bFirstMethod = i_FirstMethod;
16 self.sendport = '';
17 self.log = Log;
18 self.output = Output;
19 self.port = Port;
20 self.re_num = None;
21
22 def waiting(self):
23 if not self.waitEnd is None:
24 self.waitEnd.wait();
25
26 def SetStopEvent(self):
27 if not self.waitEnd is None:
28 self.waitEnd.set();
29 self.alive = False;
30 self.stop();
31
32 def start(self):
33 self.l_serial = serial.Serial();
34 self.l_serial.port = self.port;
35 self.l_serial.baudrate = 9600;
36 self.l_serial.timeout = 2;
37
38 self.re_num = re.compile('\d');
39
40 try:
41 if not self.output is None:
42 self.output.WriteText(u'打开通讯端口\r\n');
43 if not self.log is None:
44 self.log.info(u'打开通讯端口');
45 self.l_serial.open();
46 except Exception, ex:
47 if self.l_serial.isOpen():
48 self.l_serial.close();
49
50 self.l_serial = None;
51
52 if not self.output is None:
53 self.output.WriteText(u'出错：\r\n %s\r\n' % ex);
54 if not self.log is None:
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