#!/usr/bin/python
# Author: Jon Trulson <jtrulson@ics.com>
# Copyright (c) 2015 Intel Corporation.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

import time, sys, signal, atexit
import pyupm_sx1276 as sensorObj

# Instantiate an SX1276 using default parameters
sensor = sensorObj.SX1276()

## Exit handlers ##
# This stops python from printing a stacktrace when you hit control-C
def SIGINTHandler(signum, frame):
	raise SystemExit

# This function lets you run code on exit
def exitHandler():
	print "Exiting"
	sys.exit(0)

# Register exit handlers
atexit.register(exitHandler)
signal.signal(signal.SIGINT, SIGINTHandler)

print "Specify an argument to go into receive mode.  Default is transmit"

# 915Mhz
sensor.setChannel(915000000)

# FSK configuration (rx and tx must be configured the same):
# Tx output power = 14 dBm
# FSK freq deviation = 25000 Hz
# FSK bandwidth = 50000 bps
# FSK AFC bandwidth = 83333 Hz
# FSK datarate = 50000 bps
# FSK preamble len = 5
# FSK fixed length payload = false
# FSK CRC check = true
# FSK (rx) continuous Rx mode = False

sensor.setTxConfig(sensor.MODEM_FSK, 14, 25000, 0,
                   50000, 0, 5, False, True, False, 0, False)
    
sensor.setRxConfig(sensor.MODEM_FSK, 50000, 50000,
                   0, 83333, 5, 0, False, 0, True,
                   False, 0, False, True)

count = 0

while True:
        if (len(sys.argv) > 1):
                # receive mode
                print "Attempting to receive..."
                rv = sensor.setRx(3000)
                if (rv):
                        print "setRx returned ", rv
                else:
                        print "Received Buffer: ", sensor.getRxBufferStr();
                        # go back to sleep when done

                        sensor.setSleep()
                        time.sleep(.25)
        else:
                # transmit mode
                buffer = "Ping " + str(count)
                count += 1
                print "Sending..." + buffer
                sensor.sendStr(buffer, 3000)
                sensor.setSleep();
                time.sleep(1);
