On 04/22/2019 09:36 PM, Guillermo Gancio via USRP-users wrote:
Hi all,
I have a question trying to sync the start of data burst with a PPS signal.
With the options....
.stream_mode = UHD_STREAM_MODE_START_CONTINUOUS,
.num_samps = 0,
.stream_now = true
the code works ok, but when I change to....
.stream_now = false,
.time_spec_full_secs = 2
The code gives...
UHD Error:
The receive packet handler caught a value exception.
ValueError: bad vrt header or packet fragment
Error code 0x0 was returned during streaming. Aborting.
Before this I set the time_source to external and set the next PPS to 0 with...
You might need to share more of your code, and also, what version of UHD
are you using?
EXECUTE_OR_GOTO(free_rx_metadata,uhd_usrp_get_time_last_pps(usrp,
channel, &aux_secs,&aux_frac_secs) )
do{
sleep(0.25);
EXECUTE_OR_GOTO(free_rx_metadata,
uhd_usrp_get_time_last_pps(usrp, channel,
&aux_secs_loop,&aux_frac_secs) )
}while(aux_secs==aux_secs_loop);
sleep(0.25);
EXECUTE_OR_GOTO(free_rx_metadata,
uhd_usrp_set_time_next_pps(usrp, 0, 0.0,channel))
Any help will be very appreciated!
Thanks!
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