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Extended params for serial printers 

Update printer.Serial() constructor and its open() method to extend serial params.
Backwards compatible, no client modifications needed.
This commit is contained in:
ldos 2015-07-04 17:23:31 +02:00
parent cae02976a3
commit f0f84e1215
1 changed files with 18 additions and 2 deletions
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20
escpos/printer.py
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@ -69,23 +69,39 @@ class Usb(Escpos):
class Serial(Escpos):
""" Define Serial printer """
def __init__(self, devfile="/dev/ttyS0", baudrate=9600, bytesize=8, timeout=1):
def __init__(self, devfile="/dev/ttyS0", baudrate=9600, bytesize=8, timeout=1,
parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE,
xonxoff=False , dsrdtr=True):
"""
@param devfile : Device file under dev filesystem
@param baudrate : Baud rate for serial transmission
@param bytesize : Serial buffer size
@param timeout : Read/Write timeout
@param parity : Parity checking
@param stopbits : Number of stop bits
@param xonxoff : Software flow control
@param dsrdtr : Hardware flow control (False to enable RTS/CTS)
"""
self.devfile = devfile
self.baudrate = baudrate
self.bytesize = bytesize
self.timeout = timeout
self.parity = parity
self.stopbits = stopbits
self.xonxoff = xonxoff
self.dsrdtr = dsrdtr
self.open()
def open(self):
""" Setup serial port and set is as escpos device """
self.device = serial.Serial(port=self.devfile, baudrate=self.baudrate, bytesize=self.bytesize, parity=serial.PARITY_NONE, stopbits=serial.STOPBITS_ONE, timeout=self.timeout, dsrdtr=True)
self.device = serial.Serial(port=self.devfile, baudrate=self.baudrate,
bytesize=self.bytesize, parity=self.parity,
stopbits=self.stopbits, timeout=self.timeout,
xonxoff=self.xonxoff, dsrdtr=self.dsrdtr)
if self.device is not None:
print "Serial printer enabled"