#!/usr/bin/env python

# Copyright (c) 2011
#      Daniel O'Connor <darius@dons.net.au>.  All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. 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.
#
# THIS SOFTWARE IS PROVIDED BY AUTHOR 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 AUTHOR 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.
#

import numpy
from matplotlib import pylab
import rsib
import scpi

def test(r):
    # ID instrument
    r.write('*IDN?')
    print("ID is " + r.read(5).decode('ascii'))

    # Reset to defaults
    r.write("*RST")

    # Set to single sweep mode
    r.write("INIT:CONT OFF")

    # Enable display updates
    r.write("SYST:DISP:UPD ON")

    # Set frequency range
    r.write("FREQ:STAR 85MHz;STOP 125MHz")

    # Set reference level
    r.write("DISP:WIND:TRAC:Y:RLEV -20dBm")

    # Trigger the sweep
    r.write("INIT;*WAI")

    # Wait up to 10 seconds for it to be done
    r.write("*OPC?")
    opc = scpi.getdata(r.read(10), int)
    print("OPC - %d" % (opc))

    # Set peak excursion
    r.write("CALC:MARK:PEXC 6DB")
    # Find 3rd order intercept & get result
    r.write("CALC:MARK:FUNC:TOI ON")
    r.write("CALC:MARK:FUNC:TOI:RES?")
    toi = scpi.getdata(r.read(1))
    print("Result = %.2f" % (toi))

    # Set data format
    r.write("FORM REAL,32")
    #r.write("FORM:DATA ASC")

    # Set limit line
    r.write("CALC:LIM5:NAME 'TEST1'")
    r.write("CALC:LIM5:COMM 'Upper limit line'")
    r.write("CALC1:LIM5:TRAC 2")

    # Grab trace data
    r.write("TRAC1? TRACE1")
    data = r.read(10)
    #print "Data - " + dat
    #ary = scpi.ascdecode(data)
    ary = scpi.bindecode(data)

    # Plot data
    pylab.plot(ary)
    pylab.show()
    
if __name__ == '__main__':
    r = rsib.RSIBDevice('analyzer')
    test(r)