My complete code is:
class Tx1_Rx2(gr.top_block):
def __init__(self, nsamps):
gr.top_block.__init__(self, "Tx1_Rx2")
##################################################
# Variables
##################################################
self.samp_rate = samp_rate = 64e3
##################################################
# Blocks
##################################################
self.source = uhd.usrp_source(
",".join(("", "")),
uhd.stream_args(
cpu_format="fc32",
channels=range(2),
),
)
self.source.set_subdev_spec("A:A A:B", 0)
self.source.set_time_now(uhd.time_spec(time.time()),
uhd.ALL_MBOARDS)
self.source.set_samp_rate(samp_rate)
self.source.set_center_freq(100e6, 0)
self.source.set_gain(0, 0)
self.source.set_antenna("RX2", 0)
self.source.set_bandwidth(samp_rate, 0)
self.source.set_center_freq(100e6, 1)
self.source.set_gain(0, 1)
self.source.set_antenna("RX2", 1)
self.source.set_bandwidth(samp_rate, 1)
self.sink = uhd.usrp_sink(
",".join(("", "")),
uhd.stream_args(
cpu_format="fc32",
channels=range(2),
),
)
self.sink.set_subdev_spec("A:A A:B", 0)
self.sink.set_samp_rate(samp_rate)
self.sink.set_center_freq(100e6, 0)
self.sink.set_gain(0, 0)
self.sink.set_antenna("TX/RX", 0)
self.sink.set_bandwidth(samp_rate, 0)
self.sink.set_center_freq(100e6, 1)
self.sink.set_gain(0, 1)
self.sink.set_antenna("TX/RX", 1)
self.sink.set_bandwidth(samp_rate, 1)
self.vector = blocks.vector_sink_c(1)
self.vector2 = blocks.vector_sink_c(1)
self.header = blocks.head(gr.sizeof_gr_complex*1, int(nsamps))
self.header2 = blocks.head(gr.sizeof_gr_complex*1, int(nsamps))
self.signal = analog.sig_source_c(samp_rate,
analog.GR_COS_WAVE, 10000, 1, 0)
self.const_signal = analog.sig_source_c(0,
analog.GR_CONST_WAVE, 0, 0, 0)
##################################################
# Connections
##################################################
self.connect((self.const_signal, 0), (self.sink, 1))
self.connect((self.signal, 0), (self.sink, 0))
self.connect((self.header2, 0), (self.vector2, 0))
self.connect((self.header, 0), (self.vector, 0))
self.connect((self.source, 0), (self.header2, 0))
self.connect((self.source, 1), (self.header, 0))
def get_samp_rate(self):
return self.samp_rate
def set_samp_rate(self, samp_rate):
self.samp_rate = samp_rate
self.signal.set_sampling_freq(self.samp_rate)
self.sink.set_samp_rate(self.samp_rate)
self.sink.set_bandwidth(self.samp_rate, 0)
self.sink.set_bandwidth(self.samp_rate, 1)
self.source.set_samp_rate(self.samp_rate)
self.source.set_bandwidth(self.samp_rate, 0)
self.source.set_bandwidth(self.samp_rate, 1)
def receive_data(self):
data = np.array(self.vector.data())
return data
def receive_data2(self):
data = np.array(self.vector2.data())
return data
if __name__ == '__main__':
N = 1024
M = 100*np.round(np.log10(N))
tb = Tx1_Rx2(N)
psi = np.load("psi_mtx.npy")
phi = np.load("phi_mtx.npy")
alpha = np.dot(phi,psi)
while 1:
tb.start()
time.sleep(0.1)
tb.stop()
time.sleep(0.1)
tb.wait()
time.sleep(0.5)
signal = tb.receive_data()
time.sleep(0.5)
signal2 = tb.receive_data2()
time.sleep(0.5)
print "Signal"
print signal
print "Signal2"
print signal2
I used the sample rate of 64Ksps for both cases. I'm new to both
gnuradio and python so I am aware that my code isn't well written.
On Mon, Sep 14, 2015 at 3:21 PM, Marcus D. Leech <mle...@ripnet.com
<mailto:mle...@ripnet.com>> wrote:
On 09/14/2015 07:03 AM, Chad R wrote:
Awesome. Thank you I got it to work in gnuradio-companion however
now when I try to implement it in my python project I get the error.
thread[thread-per-block[3]: <block gr uhd usrp source (1)>]:
EnvironmentError: IOError: Radio ctrl (0) packet parse error -
AssertionError: packet_info.packet_count == (seq_to_ack & 0xfff)
in uint64_t radio_ctrl_core_3000_impl::wait_for_ack(bool)
at
/home/ubuntu/git/uhd/host/lib/usrp/cores/radio_ctrl_core_3000.cpp:264
where thread per block changes between 2 and 3 and the gr block
changes between source and sink. Is this an error caused due to
the limitations of my hardware?
Are you using different sample rates in the two scenarios?
That assertion indicates that there are seriously-bad things
happening to USB packets across the USB bus.
On Sun, Sep 13, 2015 at 6:03 PM, Marcus D. Leech
<mle...@ripnet.com <mailto:mle...@ripnet.com>> wrote:
On 09/13/2015 07:02 AM, Chad R wrote:
Hi Marcus I tried what you said and I'm still getting the
overflow errors.
I've attached a link of my flowgraph if it will maybe help
to solve this issue.
http://imgur.com/yI96ZMw
Ah.
Bundle them into a single multi-channel USRP source/sink.
There's no support for the two channels being spread across
different UHD multi_usrp objects.
On Sun, Sep 13, 2015 at 1:01 PM, Chad R
<chadric...@gmail.com <mailto:chadric...@gmail.com>> wrote:
Hi Marcus I tried what you said and I'm still getting
the overflow errors.
I've attatched a link of my flowgraph if it will maybe
help to solve this issue.
http://imgur.com/yI96ZMw
On Sat, Sep 12, 2015 at 3:26 PM, Marcus D. Leech
<mle...@ripnet.com <mailto:mle...@ripnet.com>> wrote:
On 09/12/2015 08:30 AM, Chad R wrote:
Thanks for the advice Marcus
However I updated UHD to version 3.9 the latest
stable release from the ettus binary files and I'm
still getting the error but now instead of just
DDDDD its randomly S's and D's. The S's is a
sequence error?
Yes, S and D are closely related.
I think that you're running into the "symmetry
required" issue. So, you'll need a 2nd TX channel
in your flow, with just 0s in it.
On Fri, Sep 11, 2015 at 4:21 PM, Marcus D. Leech
<mle...@ripnet.com <mailto:mle...@ripnet.com>> wrote:
On 09/11/2015 07:56 AM, Chad R wrote:
Good day.
I'm wondering if you can help me. I have a
B210 board connected to a jetson tk1 and I
am trying to send over one port and receive
over two. The hardware setup is the RX/TX
board connected to an RF filter connected
to a splitter and the connected to the two
RX2 ports. When I run one TX and one RX I
have no issues however when I run 2 RX my
python application crashes. I try run a
simple 2 Rx configuration in GNU Radio with
the 2 USRP sources connected to 2 Frequency
GUI.
However even running at a sampling rate of
64Kbps I am getting an overflow error. I
thought that maybe the jetson tk1 couldn't
handle the bandwidth but running it on my
PC I get the same results. The output is as
follows:
Executing: "/home/chad/Tx1_Rx2.py"
linux; GNU C++ version 4.8.2; Boost_105400;
UHD_003.008.001-42-g8c87a524
-- Operating over USB 3.
-- Initialize CODEC control...
-- Initialize Radio control...
-- Performing register loopback test... pass
-- Performing register loopback test... pass
-- Performing CODEC loopback test... pass
-- Performing CODEC loopback test... pass
-- Asking for clock rate 32.000000 MHz...
-- Actually got clock rate 32.000000 MHz.
-- Performing timer loopback test... pass
-- Performing timer loopback test... pass
-- Setting master clock rate selection to
'automatic'.
-- Asking for clock rate 32.768000 MHz...
-- Actually got clock rate 32.768000 MHz.
-- Performing timer loopback test... pass
-- Performing timer loopback test... pass
-- Successfully tuned to 100.000000 MHz
--
-- Asking for clock rate 32.768000 MHz... OK
-- Successfully tuned to 100.000000 MHz
--
-- Asking for clock rate 32.768000 MHz... OK
-- Successfully tuned to 100.000000 MHz
--
Using Volk machine: avx_64_mmx
-- Asking for clock rate 32.768000 MHz... OK
-- Asking for clock rate 32.768000 MHz... OK
-- Asking for clock rate 32.768000 MHz... OK
-- Asking for clock rate 32.768000 MHz... OK
-- Asking for clock rate 32.768000 MHz... OK
-- Asking for clock rate 32.768000 MHz... OK
DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDS
Surely I shouldn't get overflow errors at
such a low sampling rate? When I run the
benchmark_rate it returns no errors. Any
help would be appreciated.
Chad
Update to a newer UHD (and matching firmware),
and try your test again. My recollection is
that there was a restriction for TX/RX applications
on B210 that they had to be symmetric with
respect to number of TX/RX streams.
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