Rivendellaudio/apis/pypad/scripts/pypad_serial.py
Fred Gleason 4283684044 2019-08-26 Fred Gleason <fredg@paravelsystems.com>
* Fixed a bug in the 'pypad_serial.py' PyPAD script that caused
	an infinite loop.
2019-08-27 18:05:56 -04:00

66 lines
2.1 KiB
Python
Executable File

#!%PYTHON_BANGPATH%
# pypad_serial.py
#
# Write PAD updates to serial (tty) devices.
#
# (C) Copyright 2018-2019 Fred Gleason <fredg@paravelsystems.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 as
# published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public
# License along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
import sys
import syslog
import configparser
import pypad
import serial
from io import BytesIO
def eprint(*args,**kwargs):
print(*args,file=sys.stderr,**kwargs)
def ProcessPad(update):
n=1
section='Serial'+str(n)
while(update.config().has_section(section)):
if update.shouldBeProcessed(section):
devname=update.config().get(section,'Device')
speed=int(update.config().get(section,'Speed'))
parity=serial.PARITY_NONE
if int(update.config().get(section,'Parity'))==1:
parity=serial.PARITY_EVEN
if int(update.config().get(section,'Parity'))==2:
parity=serial.PARITY_ODD
bytesize=int(update.config().get(section,'WordSize'))
dev=serial.Serial(devname,speed,parity=parity,bytesize=bytesize)
fmtstr=update.config().get(section,'FormatString')
esc=int(update.config().get(section,'Encoding'))
dev.write(update.resolvePadFields(fmtstr,esc).encode('utf-8'))
dev.close()
n=n+1
section='Serial'+str(n)
#
# 'Main' function
#
rcvr=pypad.Receiver()
try:
rcvr.setConfigFile(sys.argv[3])
except IndexError:
eprint('pypad_serial.py: USAGE: cmd <hostname> <port> <config>')
sys.exit(1)
rcvr.setPadCallback(ProcessPad)
rcvr.start(sys.argv[1],int(sys.argv[2]))