Hi Ivan,
it's not the most common mode; why do you want to use it?
Anyway, your way of calling recv() is wrong, which has little to do with
the STREAM_MODE you're using. Just spawn of a separate thread that calls
recv() as often as necessary in an uniterrupted loop.
Best regards,
Marcus
On 04.09.2017 08:21, Ivan Zahartchuk via USRP-users wrote:
> Can you please tell us how to properly implement data reception from
> usrp n210 using STREAM_MODE_NUM_SAMPS_AND_MORE:
> import numpy as np
> import libpyuhd
> import pyqtgraph as pg
> import time
> from PyQt4 import QtGui,QtCore
> app = QtGui.QApplication([])
> win=pg.GraphicsWindow()
> label = pg.LabelItem(justify='right')
> win.addItem(label)
> p1 = win.addPlot(row=1, col=0)
> p2=p1.plot()
> global p2
> vb = p1.vb
> rezult=np.empty(4096,dtype=np.complex64)
> usrp1=libpyuhd.usrp.multi_usrp("addr=192.168.10.2")
> chanels=0 usrp1.set_rx_rate(40e6,0)
> usrp1.set_rx_gain(38,0)
> usrp1.set_rx_freq(libpyuhd.types.tune_request(400e6),0)
> st_args=libpyuhd.usrp.stream_args("fc32","sc8")
> st_args.chanels=chanels
> metadata=libpyuhd.types.rx_metadata()
> streamer=usrp1.get_rx_stream(st_args)
> stream_cmd = libpyuhd.types.stream_cmd(libpyuhd.types.stream_mode.num_more)
> #stream_cmd=libpyuhd.types.stream_cmd.time_spec(0.1)
> streamer.issue_stream_cmd(stream_cmd)
> stream_cmd.num_samps=4096 stream_cmd.stream_now=False
> #np.set_printoptions(threshold='nan')
> buffer_samps=streamer.get_max_num_samps()
> #print(buffer_samps) recv_buff = np.zeros(4096, dtype=np.complex64)
> #print (recv_buff.shape) recv_samps=0 start=time.time()
> def update():
> global recv_samps
> while True:
> streamer.recv(recv_buff, metadata)
> b=recv_buff[:]
> p2.setData(abs(np.fft.fft(b)),pen="r")
> #timer.timeout(5) timer = QtCore.QTimer()
> timer.timeout.connect(update)
> timer.start(20)
> #recv_buff = np.zeros(4096, dtype=np.complex64) if __name__ == '__main__':
> import sys
> if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
> QtGui.QApplication.instance().exec_()
>
>
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