I worked on an "interleaved char to complex" block some time ago. It was not working right until I changed it to specify 'signed' char instead of letting the compiler default happen (which could be either way). - Tim
From: discuss-gnuradio-bounces+tmonahan=qti.qualcomm....@gnu.org [mailto:discuss-gnuradio-bounces+tmonahan=qti.qualcomm....@gnu.org] On Behalf Of Nemanja Savic Sent: Wednesday, May 29, 2013 4:55 PM To: discuss-gnuradio@gnu.org Subject: [Discuss-gnuradio] strange operation when char at input Hi all guys, I wouldn't bother again but I have spent a lot of time trying to figure out what's going on. Nameli I want to design block with char type at input and char type at the output. After finished with the design I realized strange block operation. Input samples were always zero. Then I tried with this: int test_proba_sync_bb::work(int noutput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items) { const char *in1 = (const char *) input_items[0]; char *out = (char *) output_items[0]; const char *in2 = (const char *) input_items[1]; // Do <+signal processing+> for(int i=0;i<noutput_items;i++) out[i] = in1[i]+in2[i]; // Tell runtime system how many output items we produced. return noutput_items; } After quite some time I designed similar block with float ports and it worked. Then I changed upper block to have short type at input and output and it worked just fine. And yes, in test everything works just fine, but in grc not, It always spits 0 at the output. Is there any possible complications with endianess or I don't know. Best, -- Nemanja Savić _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org https://lists.gnu.org/mailman/listinfo/discuss-gnuradio
