Hi Sreena, a few quick remarks: - where does in_arg come from? - in0 should be seen as a vector of vectors. It's often useful to "print in0.shape", if in0 is a numpy array - potential mistake: just returning len(input_items[0]). Be *very* aware of what the return value of a work call should be (i.e. the number of items produced). I think you meant to calculate but one sum, is that right?
Greetings, Marcus On 18.06.2014 10:57, sreena p h wrote: > Hi > > I'm new to GNU radio and is trying to develop my own block. I want to develop > a block that intake a vector and out put sum of the vector elements. I used > the out of tree module and followed tutorial using python code. How should be > the arguments of blocks.vector_source_f to be given if i am inputting vector > stream of four integers is used. the python code and test file is given > below. > > Code: > > def __init__(self, in_arg): > gr.sync_block.__init__(self, > name="sream_ff", > in_sig=[(numpy.float32, 4)], > out_sig=[numpy.float32]) > def work(self, input_items, output_items): > in0 = input_items[0] > out = output_items[0] > # <+signal processing here+> > out[:] = sum(in0)*in_arg > return len(output_items[0]) > > Test code: > > def test_001_t (self): > src_data = (([1,1,1,1],4), ([1,2,3,4],4)) > expected_result = (8, 20) > src = blocks.vector_source_f(src_data) > fxn = sream_ff(2) > snk = blocks.vector_sink_f() > # set up fg > self.tb.connect(src, fxn) > self.tb.connect(fxn, snk) > self.tb.run () > # check data > result_data = snk.data () > self.assertFloatTuplesAlmostEqual (expected_result, result_data, 6) > > > _______________________________________________ > Discuss-gnuradio mailing list > Discuss-gnuradio@gnu.org > https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
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