blob: ab0fd14973559b0e9ba066eae3a41b07cf0f9ab0 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
#!/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 flowgraph variable
via setter callback. If the second element the pair is a compound PMT object or not
of the datatype expected by the flowgraph the behavior of the flowgraph may be
unpredictable.
"""
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):
if not pmt.is_pair(msg) or pmt.is_dict(msg) or pmt.is_pdu(msg):
gr.log.warn(
"Input message %s is not a simple pair, dropping" % repr(msg))
return
new_val = pmt.to_python(pmt.cdr(msg))
try:
self.callback(new_val)
except Exception as e:
gr.log.error("Error when calling " + repr(self.callback.name()) + " with " +
repr(new_val) + " (reason: %s)" % repr(e))
def stop(self):
return True
|
