Greetings,
Using the latest gnuradio/next v3.3.1git-865-gd429522b and UHD from
yesterday (commit c14bbffbebb817fc1c622785094268fe68164c60) I get
thread[thread-per-block[0]: <gr_block uhd single_usrp source (1)>]:
caught unrecognized exception
whenever I call the gr.top_block.unlock(), stop() and maybe also
wait() functions.
I have attached a simple Python script which triggers this exception.
I am using USRP1 and the exception occurs with both WBX and RFX2400
daughterboards
I didn't notice any side effects. The receiver code where I discovered
this performs some reconfiguration of the flow graph between lock()
and unlock() and it continues to function after the exception.
My previous reference is v3.3.1git-832-ga2262b6b from Jan 11 and UHD
b4d58f3501596fdddf240d576d0b1b2cb5862892 where this issue did not
occur.
Alex
#!/usr/bin/env python
#
from gnuradio import gr
from gnuradio import uhd
import time
class my_top_block(gr.top_block):
def __init__(self):
gr.top_block.__init__(self)
self.u = uhd.single_usrp_source(device_addr="",
io_type=uhd.io_type_t.COMPLEX_FLOAT32,
num_channels=1,
)
self.u.set_subdev_spec("A:")
self.u.set_samp_rate(250000)
self.freq_range = { "start" : self.u.get_freq_range(0).start(),
"stop" : self.u.get_freq_range(0).stop(),
"step" : self.u.get_freq_range(0).step()
}
r = self.u.set_center_freq(float(self.freq_range["start"] + self.freq_range["stop"])/2, 0)
if r:
print "TIF:", r.target_inter_freq, " AIF:", r.actual_inter_freq, " TDF:", r.target_dsp_freq, "ADF:", r.actual_dsp_freq
else:
print "Failed to set frequency to ", self._freq
self.u.set_antenna("RX2", 0)
self.sink = gr.null_sink(gr.sizeof_gr_complex)
self.connect(self.u, self.sink)
if __name__ == "__main__":
tb = my_top_block();
print "Start"
tb.start()
print "Sleep 2 sec"
time.sleep(2)
print "Lock"
tb.lock()
print "Sleep 2 sec"
time.sleep(2)
print "Unlock"
tb.unlock()
print "Sleep 3 sec"
time.sleep(3)
print "Stop"
tb.stop()
print "Wait"
tb.wait()
print "Sleep 3 sec"
time.sleep(3)
print "Start"
tb.start()
print "Sleep 3 sec"
time.sleep(3)
print "Stop"
tb.stop()
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