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dmeiss2s
su
Commits
9cceeb92
Commit
9cceeb92
authored
9 years ago
by
Daniel Meißner
Committed by
Daniel Meißner
9 years ago
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added script to count zeros in enocean dumps via energy based signaldetection
parent
0cff140f
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gr_grc/count_zeros.py
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gr_grc/count_zeros.py
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9cceeb92
#!/usr/bin/env python2
# -*- coding: utf-8 -*-
##################################################
# GNU Radio Python Flow Graph
# Title: Top Block
# Generated: Fri Jan 22 17:58:53 2016
##################################################
import
time
import
struct
import
array
from
gnuradio
import
blocks
from
gnuradio
import
eng_notation
from
gnuradio
import
gr
from
gnuradio.eng_option
import
eng_option
from
gnuradio.filter
import
firdes
from
optparse
import
OptionParser
import
numpy
as
np
class
top_block
(
gr
.
top_block
):
def
__init__
(
self
):
gr
.
top_block
.
__init__
(
self
,
"
Top Block
"
)
##################################################
# Variables
##################################################
self
.
samp_rate
=
samp_rate
=
2e6
self
.
freq
=
freq
=
868e6
##################################################
# Message queues (added by grcconvert)
##################################################
self
.
msgq_out
=
blocks_message_sink_0_msgq_out
=
gr
.
msg_queue
(
0
)
##################################################
# Blocks
##################################################
self
.
blocks_throttle_0
=
blocks
.
throttle
(
gr
.
sizeof_gr_complex
*
1
,
10
*
samp_rate
,
True
)
self
.
blocks_threshold_ff_0
=
blocks
.
threshold_ff
(
0.001
,
0.001
,
0
)
self
.
blocks_message_sink_0
=
blocks
.
message_sink
(
gr
.
sizeof_float
*
1
,
blocks_message_sink_0_msgq_out
,
False
)
self
.
blocks_file_source_0
=
blocks
.
file_source
(
gr
.
sizeof_gr_complex
*
1
,
"
/home/meise/tmp/iq_dumps/enocean/868_2m_enocean.iq
"
,
False
)
self
.
blocks_complex_to_mag_squared_0
=
blocks
.
complex_to_mag_squared
(
1
)
##################################################
# Connections
##################################################
self
.
connect
((
self
.
blocks_complex_to_mag_squared_0
,
0
),
(
self
.
blocks_threshold_ff_0
,
0
))
self
.
connect
((
self
.
blocks_file_source_0
,
0
),
(
self
.
blocks_throttle_0
,
0
))
# removed by grcconvert: # self.connect((self.blocks_message_sink_0, 'msg'), (self, 0))
self
.
connect
((
self
.
blocks_threshold_ff_0
,
0
),
(
self
.
blocks_message_sink_0
,
0
))
self
.
connect
((
self
.
blocks_throttle_0
,
0
),
(
self
.
blocks_complex_to_mag_squared_0
,
0
))
def
get_samp_rate
(
self
):
return
self
.
samp_rate
def
set_samp_rate
(
self
,
samp_rate
):
self
.
samp_rate
=
samp_rate
self
.
blocks_throttle_0
.
set_sample_rate
(
self
.
samp_rate
)
def
get_freq
(
self
):
return
self
.
freq
def
set_freq
(
self
,
freq
):
self
.
freq
=
freq
def
main
(
top_block_cls
=
top_block
,
options
=
None
):
tb
=
top_block_cls
()
tb
.
start
()
data
=
np
.
memmap
(
open
(
"
/home/meise/tmp/iq_dumps/enocean/868_2m_enocean.iq
"
),
mode
=
"
r
"
,
dtype
=
np
.
complex64
)
samples_in_file
=
len
(
data
)
print
(
"
sum of all samples: %s
\n
"
%
samples_in_file
)
count_zero
=
0
count_one
=
0
samples_sum
=
0
while
True
:
# pull from message queue
msg
=
tb
.
msgq_out
.
delete_head
()
msg_string
=
msg
.
to_string
()
# # extract floats from msg string
# # it is slow. very slow! :/
# for i in range(0,len(sample),4):
# # unpack sample to have a tuples
# unpacked = struct.unpack_from('f', sample[i:i+4])
# samples.append(unpacked[0])
# if len(unpacked) != 1:
# print("unpacked length: %s" % (len(unpacked)))
# convert string with floats into an numpy array
samples
=
np
.
fromstring
(
msg_string
,
dtype
=
'
float32
'
)
# do some counting
count_one
+=
np
.
count_nonzero
(
samples
)
count_zero
+=
np
.
count_nonzero
(
samples
!=
1.0
)
samples_sum
+=
len
(
samples
)
if
samples_sum
==
samples_in_file
:
break
print
(
"
%s of %s sample
"
%
(
samples_sum
,
samples_in_file
))
print
(
"
one: %s
"
%
count_one
)
print
(
"
zero: %s
"
%
count_zero
)
if
__name__
==
'
__main__
'
:
main
()
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