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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#=======================================================================
#
# seriedebug.py
# -------------
# Program that sends test bytes onto the serial link and print out
# any response.
#
# Note: This proram requires the PySerial module.
# http://pyserial.sourceforge.net/
#
#
# Author: Joachim Strömbergson
# Copyright (c) 2014 NORDUnet A/S
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
# - Redistributions of source code must retain the above copyright notice,
# this list of conditions and the following disclaimer.
#
# - Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# - Neither the name of the NORDUnet nor the names of its contributors may
# be used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
# IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
# PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
# TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
# PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
# LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#
#=======================================================================
#-------------------------------------------------------------------
# Python module imports.
#-------------------------------------------------------------------
import sys
import serial
#-------------------------------------------------------------------
# main()
#
# Parse arguments.
#-------------------------------------------------------------------
def main():
print "Seriedebug started..."
print
verbose = True
# Create a serial devce and configure it.
# Should be:
# 1200 Baud
# 1 start bit
# 8 data bits
# 1 even parity bit
# 2 stop bits
# No RTS/CTS
# Note: You need to update to the correct device in your system.
ser = serial.Serial()
ser.port='/dev/cu.usbserial-A5020LKF'
ser.baudrate=1200
ser.bytesize=8
ser.parity='E'
ser.stopbits=2
ser.timeout=1
ser.writeTimeout=0
# Open the interface.
ser.open()
if verbose:
print "Opening device."
# Send a byte and try to get the response.
test_byte = '\xaa'
ser.write(test_byte)
if verbose:
print "transmitting byte 0x%0x" % ord(test_byte)
if verbose:
print "Waiting for response..."
response = ""
while not len(response):
response = ser.read()
if len(response):
print "received response: 0x%0x" % ord(response)
# Exit nicely.
if verbose:
print "Done. Closing device."
ser.close()
#-------------------------------------------------------------------
# __name__
# Python thingy which allows the file to be run standalone as
# well as parsed from within a Python interpreter.
#-------------------------------------------------------------------
if __name__=="__main__":
# Run the main function.
sys.exit(main())
#=======================================================================
# EOF seriedebug.py
#=======================================================================
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