USRP N210
2017-10-05 11:26 GMT+03:00 Ivan Zahartchuk <adray0...@gmail.com>:
> Hi, Marcus
>
> I'm working on the data transmission using USRP B200 and UHD Python driver.
> When transmitting the data for two usrp, the error U appears. I want to
> start the transmission as another process.
> Here is my code:
>
> from PyQt4 import QtCore,QtGui,uic
> import sys
> import libpyuhd as lib
> import numpy as np
> from multiprocessing import Process,Lock,Pool
> import time
>
>
> class MainWindows(QtGui.QWidget):
> def __init__(self):
> QtGui.QWidget.__init__(self)
> uic.loadUi("wind.ui",self)
> self.connect(self.pushButton,QtCore.SIGNAL("clicked()"),self.start_on)
> def transmitter400(self):
> data = np.array(np.fft.fft(np.random.uniform(0, 1, 726)),
> dtype=np.complex64)
> freq = 450e6
> print (freq)
> band = 50e6
> usrp = lib.usrp.multi_usrp("addr=192.168.10.2")
> st_args = lib.usrp.stream_args("fc32", "sc8")
> streamer = usrp.get_tx_stream(st_args)
> usrp.set_tx_rate(band, 0)
> usrp.set_tx_freq(lib.types.tune_request(freq), 0)
> usrp.set_tx_gain(40, 0)
> st_args.channels = [0]
>
> #data = np.array(np.random.uniform(0, 1, 4096), dtype=np.complex64)
>
> usrp.set_time_now(lib.types.time_spec(0))
>
> metadata = lib.types.tx_metadata()
> metadata.start_of_burst = True
> metadata.end_of_burst=False
> metadata.has_time_spec=True
>
> metadata.time_spec = lib.types.time_spec(0.1)
> metadata.time_spec+=usrp.get_time_now()
>
> # QtCore.QObject.connect(window.gener)
> while True:
> #QtCore.QThread.msleep(1)
> streamer.send(data, metadata)
> metadata.start_of_burst=False
> metadata.end_of_burst = False
> metadata.has_time_spec = False
> def transmitter800(self):
> #lock = Lock()
> #lock.acquire()
> data1 = np.array(np.fft.fft(np.random.uniform(0, 1, 726)),
> dtype=np.complex64)
> freq = 850e6
> print (freq)
> band = 50e6
> usrp1 = lib.usrp.multi_usrp("addr=192.168.10.3")
> st_args1 = lib.usrp.stream_args("fc32", "sc8")
> streamer1 = usrp1.get_tx_stream(st_args1)
> usrp1.set_tx_rate(band, 0)
> usrp1.set_tx_freq(lib.types.tune_request(freq), 0)
> usrp1.set_tx_gain(40, 0)
> st_args1.channels = [0]
> # data = np.array(np.random.uniform(0, 1, 4096), dtype=np.complex64)
>
> usrp1.set_time_now(lib.types.time_spec(0))
>
> metadata1 = lib.types.tx_metadata()
> metadata1.start_of_burst = True
> metadata1.end_of_burst = False
> metadata1.has_time_spec = True
> metadata1.time_spec = lib.types.time_spec(0.1)
> metadata1.time_spec += usrp1.get_time_now()
>
> # QtCore.QObject.connect(window.gener)
> while True:
> # QtCore.QThread.msleep(1)
> streamer1.send(data1, metadata1)
> metadata1.start_of_burst = False
> metadata1.end_of_burst = False
> metadata1.has_time_spec = False
>
> #print metadata
> #metadata.has_time_spec=False
> #if window.gener.isChecked() == True:
> def start_on(self):
>
> p = Process(target=self.transmitter400)
> p1 = Process(target=self.transmitter800)
> p.daemon=True
> p1.daemon=True
> p.start()
> p1.start()
> p.join()
> p1.join()
> if __name__=="__main__":
> app=QtGui.QApplication(sys.argv)
> window=MainWindows()
> window.show()
> sys.exit(app.exec_())
> if (sys.flags.interactive != 1) or not hasattr(QtCore, 'PYQT_VERSION'):
> QtGui.QApplication.instance().exec_()
> Tell me please, what seems to be a problem?
> Thank you in advance.
>
>
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