Hi list,
I am designing very simple FSK modulator. The principle of operation is
following:
based on symbol value nco generates baseband signa. The problem is
somewhere in my forecast function, but I can't figure out where, probably
because of misunderstanfing of something.
The body of my forecast function is:
ninput_items_required[0] = noutput_items * d_sym_rate / d_sampling_freq;
printf("ninput_items_required %d, noutput_items %d\n",
ninput_items_required[0], noutput_items);
when i run execution, the output is following:
ninput_items_required 8, noutput_items 4096
ninput_items_required 4, noutput_items 2048
ninput_items_required 2, noutput_items 1024
ninput_items_required 1, noutput_items 512
ninput_items_required 0, noutput_items 256
ninput: 0, produced: 0
The last line of the output comes from general_work function and prints
number of input items and number of produced output samples.
Can somebody explain me why forecast is called 5 times, till number of
input items reach 0, and after that nothing is possible in work function,
cause it won't enter the loop since ninput_items = 0;
Thanks,
--
Nemanja Savić
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