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#!/usr/bin/env python
#
# Copyright 2020 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
from gnuradio import gr
import pmt
class msg_pair_to_var(gr.sync_block):
"""
This block will take an input message pair and allow you to set a gnuradio variable.
"""
def __init__(self, callback):
gr.sync_block.__init__(self, name="msg_pair_to_var", in_sig=None, out_sig=None)
self.callback = callback
self.message_port_register_in(pmt.intern("inpair"))
self.set_msg_handler(pmt.intern("inpair"), self.msg_handler)
def msg_handler(self, msg):
try:
new_val = pmt.to_python(pmt.cdr(msg))
self.callback(new_val)
except Exception as e:
gr.log.error("Error with message conversion: %s" % str(e))
def stop(self):
return True
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