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1 # forked from /my/proj/house/frontdoor/loggingserial.py
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2
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3 import serial, logging
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4
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5 log = logging.getLogger('serial')
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6
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7 class LoggingSerial(object):
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8 """like serial.Serial, but logs all data"""
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9
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10 def __init__(self, port=None, ports=None, baudrate=9600, timeout=10):
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11 if ports is None:
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12 ports = [port]
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13
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14 for port in ports:
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15 try:
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16 log.info("trying port: %s" % port)
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17 self.ser = serial.Serial(port=port, baudrate=baudrate,
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18 timeout=timeout,
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19 xonxoff=0, rtscts=0)
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20 except serial.SerialException:
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21 pass
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22 if not hasattr(self, 'ser'):
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23 raise IOError("no port found")
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24
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25 def flush(self):
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26 self.ser.flush()
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27
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28 def close(self):
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29 self.ser.close()
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30
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31 def write(self, s):
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32 log.info("Serial write: %r" % s)
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33 self.ser.write(s)
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34
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35 def read(self, n, errorOnTimeout=True):
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36 buf = self.ser.read(n)
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37 log.info("Serial read: %r" % buf)
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38 if errorOnTimeout and n > 0 and len(buf) == 0:
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39 raise ValueError("timed out")
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40 return buf
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