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
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
#
# Copyright 2017-2018 Ettus Research, a National Instruments Company
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
""" @package usrp
Python UHD module containing the MultiUSRP and other objects
"""
import numpy as np
from . import libpyuhd as lib
class MultiUSRP(lib.usrp.multi_usrp):
"""
MultiUSRP object for controlling devices
"""
def __init__(self, args=""):
"""MultiUSRP constructor"""
super(MultiUSRP, self).__init__(args)
def recv_num_samps(self, num_samps, freq, rate=1e6, channels=(0,), gain=10):
"""
RX a finite number of samples from the USRP
:param num_samps: number of samples to RX
:param freq: RX frequency (Hz)
:param rate: RX sample rate (Hz)
:param channels: list of channels to RX on
:param gain: RX gain (dB)
:return: numpy array of complex floating-point samples (fc32)
"""
result = np.empty((len(channels), num_samps), dtype=np.complex64)
for chan in channels:
super(MultiUSRP, self).set_rx_rate(rate, chan)
super(MultiUSRP, self).set_rx_freq(lib.types.tune_request(freq), chan)
super(MultiUSRP, self).set_rx_gain(gain, chan)
st_args = lib.usrp.stream_args("fc32", "sc16")
st_args.channels = channels
metadata = lib.types.rx_metadata()
streamer = super(MultiUSRP, self).get_rx_stream(st_args)
buffer_samps = streamer.get_max_num_samps()
recv_buffer = np.zeros(
(len(channels), buffer_samps), dtype=np.complex64)
recv_samps = 0
stream_cmd = lib.types.stream_cmd(lib.types.stream_mode.start_cont)
stream_cmd.stream_now = True
streamer.issue_stream_cmd(stream_cmd)
samps = np.array([], dtype=np.complex64)
while recv_samps < num_samps:
samps = streamer.recv(recv_buffer, metadata)
if metadata.error_code != lib.types.rx_metadata_error_code.none:
print(metadata.strerror())
if samps:
real_samps = min(num_samps - recv_samps, samps)
result[:, recv_samps:recv_samps + real_samps] = recv_buffer[:, 0:real_samps]
recv_samps += real_samps
stream_cmd = lib.types.stream_cmd(lib.types.stream_mode.stop_cont)
streamer.issue_stream_cmd(stream_cmd)
while samps:
samps = streamer.recv(recv_buffer, metadata)
# Help the garbage collection
streamer = None
return result
def send_waveform(self,
waveform_proto,
duration,
freq,
rate=1e6,
channels=(0,),
gain=10):
"""
TX a finite number of samples from the USRP
:param waveform_proto: numpy array of samples to TX
:param duration: time in seconds to transmit at the supplied rate
:param freq: TX frequency (Hz)
:param rate: TX sample rate (Hz)
:param channels: list of channels to TX on
:param gain: TX gain (dB)
:return: the number of transmitted samples
"""
for chan in channels:
super(MultiUSRP, self).set_tx_rate(rate, chan)
super(MultiUSRP, self).set_tx_freq(lib.types.tune_request(freq), chan)
super(MultiUSRP, self).set_tx_gain(gain, chan)
st_args = lib.usrp.stream_args("fc32", "sc16")
st_args.channels = channels
streamer = super(MultiUSRP, self).get_tx_stream(st_args)
buffer_samps = streamer.get_max_num_samps()
proto_len = waveform_proto.shape[-1]
if proto_len < buffer_samps:
waveform_proto = np.tile(waveform_proto,
(1, int(np.ceil(float(buffer_samps)/proto_len))))
proto_len = waveform_proto.shape[-1]
metadata = lib.types.tx_metadata()
send_samps = 0
max_samps = int(np.floor(duration * rate))
if len(waveform_proto.shape) == 1:
waveform_proto = waveform_proto.reshape(1, waveform_proto.size)
if waveform_proto.shape[0] < len(channels):
waveform_proto = np.tile(waveform_proto[0], (len(channels), 1))
while send_samps < max_samps:
real_samps = min(proto_len, max_samps-send_samps)
if real_samps < proto_len:
samples = streamer.send(waveform_proto[:real_samps], metadata)
else:
samples = streamer.send(waveform_proto, metadata)
send_samps += samples
# Help the garbage collection
streamer = None
return send_samps
SubdevSpecPair = lib.usrp.subdev_spec_pair
SubdevSpec = lib.usrp.subdev_spec
GPIOAtrReg = lib.usrp.gpio_atr_reg
GPIOAtrMode = lib.usrp.gpio_atr_mode
Unit = lib.usrp.unit
AuxDAC = lib.usrp.aux_dac
AuxADC = lib.usrp.aux_adc
SpecialProps = lib.usrp.special_props
Sampling = lib.usrp.sampling
FEConnection = lib.usrp.fe_connection
StreamArgs = lib.usrp.stream_args
RXStreamer = lib.usrp.rx_streamer
TXStreamer = lib.usrp.tx_streamer
|
