Hi,
I am implementing a stop-and-wait ARQ system using RFX2400 boards. Sometimes
the transmitter suddenly stops working , and if I do ctrl+c the programs
stops but does not work wheras if I do ctrl +z, I recieve following error
after sometime:
ICE default IO error handler doing an exit(), pid = 3793, errno
= 0
And, if I try to run the program again, it stops communicating with USRP
with following error messages:
File "./mcl_snwARQ_tx.py", line 118, in ?
main()
File "./mcl_snwARQ_tx.py", line 100, in main
fg_rx = my_rx_graph(demods[options.modulation], rx_callback, options)
File "./mcl_snwARQ_tx.py", line 30, in __init__
self.rxpath = receive_path(self, demod_class, rx_callback, options)
File "/root/gnuradio-3.0.2/gr-mcl/receive_path.py", line 59, in __init__
self._setup_usrp_source()
File "/root/gnuradio-3.0.2/gr-mcl/receive_path.py", line 119, in
_setup_usrp_source
fusb_nblocks=self._fusb_nblocks)
File "/usr/local/lib/python2.4/site-packages/gnuradio/usrp.py", line 248,
in __init__
fpga_filename, firmware_filename)
File "/usr/local/lib/python2.4/site-packages/gnuradio/usrp1.py", line
1229, in source_c
return _usrp1.source_c(*args)
RuntimeError: std::runtime_error
After that I need to unplug & plug the USB cable to start working with it.
Ultimately I need to do ctrl+z and then unplug-plug the USB cable to start
woking.
Can somebody help me out to resolve the problem which I am facing? I am
using following settings for transmitter side:
--tx-freq 2.4G --rx-freq 2.48G -r 500k -v -m gmsk --tx-amplitude 550
--rx-gain 60
and following settings for receiver side:
--rx-freq 2.40G --tx-freq 2.48G -r 500k -v -m gmsk --tx-amplitude 2000
--rx-gain 75
Thanks in advance.
Regards,
Tarun
University of Texas - Dallas
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