Hi, Marcus
I'm working on the data transmission using USRP B200 and UHD Python driver.
When transmitting the data, the error U appears. I think that the problem
is in the USRP B200 initialisation. 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
from time import sleep
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 transmitter(self):
freq = 450e6
print (freq)
band = 30e6
usrp = lib.usrp.multi_usrp(" ")
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]
metadata = lib.types.tx_metadata()
metadata.start_of_burst = True
metadata.end_of_burst=False
metadata.time_spec = lib.types.time_spec(1)
data = np.array(np.random.uniform(0, 1, 4096), dtype=np.complex64)
# QtCore.QObject.connect(window.gener)
while True:
streamer.send(data, metadata)
metadata.time_spec = lib.types.time_spec(0)
#metadata.has_time_spec=False
#if window.gener.isChecked() == True:
def start_on(self):
p = Process(target=self.transmitter)
p.start()
p.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.
PS sorry for my English
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