On Wed, Mar 30, 2005 at 03:15:38PM -0700, [EMAIL PROTECTED] wrote:
> I have the following program to capture USRP samples and write them to a
> file. What is a simple way to have the program capture for X number of
> samples and then stop?
>
> Thanks
Yes.
Use gr.head(...) to get the "head of the stream" and gr.run() instead of
start()/stop().
Eric
----------------------------------------------------------------
from gnuradio import gr
from gnuradio import audio
from gnuradio import usrp
from gnuradio.eng_option import eng_option
from optparse import OptionParser
def build_graph (IF_freq, filename, nsamples=0):
fg = gr.flow_graph ()
# 256K sample rate
adc_rate = 64e6
decim = 16
mux = 0xf0f0f0f0
src = usrp.source_c (0, decim, 1, mux)
src.set_rx_freq (0, -IF_freq)
src.set_pga (0, 20)
dst = gr.file_sink (gr.sizeof_gr_complex, filename)
if nsamples > 0:
head = gr.head(gr.sizeof_gr_complex, nsamples)
fg.connect(src, head, dst)
else:
fg.connect (src, dst)
return fg
def main ():
samples = 256000
fg = build_graph (10.7e6, "if_sample_4m_complex.dat", samples)
fg.run()
if __name__ == '__main__':
main ()
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