-
Notifications
You must be signed in to change notification settings - Fork 0
/
FBQ_xcvr_epy_block_2.py
47 lines (38 loc) · 1.75 KB
/
FBQ_xcvr_epy_block_2.py
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
47
"""
Embedded Python Blocks:
Each time this file is saved, GRC will instantiate the first class it finds
to get ports and parameters of your block. The arguments to __init__ will
be the parameters. All of them are required to have default values!
"""
import numpy as np
from gnuradio import gr
import pmt
import time
class blk(gr.sync_block): # other base classes are basic_block, decim_block, interp_block
"""Message gate. This module either transfer messages reads a message from the input port and
applies a python expression on it before sending it along on the output port
Parameters:
expr: String. The expression to apply. May use variables."""
def __init__(self, offset=0, factor=10): # only default arguments here
"""arguments to this function show up as parameters in GRC"""
gr.sync_block.__init__(
self,
name='Message mangler', # will show up in GRC
in_sig=None,
out_sig=None
)
self.message_port_register_in(pmt.intern('msg_in'))
self.message_port_register_out(pmt.intern('msg_out'))
self.set_msg_handler(pmt.intern('msg_in'), self.handle_msg)
self.offset=offset
self.factor=factor
# if an attribute with the same name as a parameter is found,
# a callback is registered (properties work, too).
def handle_msg(self, msg):
adj = self.factor*pmt.to_python(pmt.cdr(msg))
new_value = self.offset + adj
print(adj, new_value)
p = pmt.to_pmt(new_value)
self.message_port_pub(pmt.intern("msg_out"), pmt.cons(pmt.intern("fq"), p))
time.sleep(0.1)
self.message_port_pub(pmt.intern("msg_out"), pmt.cons(pmt.intern("fq"), p))