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Diffstat (limited to 'pyserial/examples/enhancedserial.py')
-rw-r--r-- | pyserial/examples/enhancedserial.py | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/pyserial/examples/enhancedserial.py b/pyserial/examples/enhancedserial.py deleted file mode 100644 index 2c81ae1..0000000 --- a/pyserial/examples/enhancedserial.py +++ /dev/null @@ -1,62 +0,0 @@ -#!/usr/bin/env python -"""Enhanced Serial Port class -part of pyserial (http://pyserial.sf.net) (C)2002 cliechti@gmx.net - -another implementation of the readline and readlines method. -this one should be more efficient because a bunch of characters are read -on each access, but the drawback is that a timeout must be specified to -make it work (enforced by the class __init__). - -this class could be enhanced with a read_until() method and more -like found in the telnetlib. -""" - -from serial import Serial - -class EnhancedSerial(Serial): - def __init__(self, *args, **kwargs): - #ensure that a reasonable timeout is set - timeout = kwargs.get('timeout',0.1) - if timeout < 0.01: timeout = 0.1 - kwargs['timeout'] = timeout - Serial.__init__(self, *args, **kwargs) - self.buf = '' - - def readline(self, maxsize=None, timeout=1): - """maxsize is ignored, timeout in seconds is the max time that is way for a complete line""" - tries = 0 - while 1: - self.buf += self.read(512) - pos = self.buf.find('\n') - if pos >= 0: - line, self.buf = self.buf[:pos+1], self.buf[pos+1:] - return line - tries += 1 - if tries * self.timeout > timeout: - break - line, self.buf = self.buf, '' - return line - - def readlines(self, sizehint=None, timeout=1): - """read all lines that are available. abort after timout - when no more data arrives.""" - lines = [] - while 1: - line = self.readline(timeout=timeout) - if line: - lines.append(line) - if not line or line[-1:] != '\n': - break - return lines - -if __name__=='__main__': - #do some simple tests with a Loopback HW (see test.py for details) - PORT = 0 - #test, only with Loopback HW (shortcut RX/TX pins (3+4 on DSUB 9 and 25) ) - s = EnhancedSerial(PORT) - #write out some test data lines - s.write('\n'.join("hello how are you".split())) - #and read them back - print s.readlines() - #this one should print an empty list - print s.readlines(timeout=0.4) |