On Tue, Mar 11, 2014 at 5:29 AM, Martin Braun <martin.br...@ettus.com>wrote:
> On 03/10/2014 06:57 PM, David Halls wrote: > > Hi, > > > > I get the following error connecting 'OFDM Serializer' (GNU Radio block > > with complex output), to my own Python block 'blsd_dec_bfb' (with > > complex input) > > > > "ValueError: itemsize mismatch: ofdm_serializer_vcc0:0 using 8, > > blsd_dec_bfb0:0 using 16" > > > > This is the code in the beginning of my block > > > > "class blsd_dec_bfb(gr.basic_block): > > """ > > docstring for block blsd_dec_bfb > > """ > > def __init__(self, num_packets=1, K=50, K2=20, kA1=4, NA1=8, > > num_carriers=64): > > gr.basic_block.__init__(self, > > name="blsd_dec_bfb", > > in_sig=[numpy.complex], > > out_sig=[numpy.uint8,numpy.uint8,numpy.uint8])" > > I think you need to do numpy.complex64 -- not 100%, can you please tell > us if this worked. > > M > > > The colours match in the GRC, and it lets me run it (i.e. no complaints > > about type mismatch before run-time). > The "float" and "gr_complex" data type in c++ usually match with "numpy.float32" and "numpy.complex64" in python. The "int" in c++ matches "numpy.int32" in python. So far I haven't encountered any exception. c++ python -------------------------------------------------------- float <-----> numpy.float32 gr_complex <-----> numpy.complex64 int <-----> numpy.int32 Regards, Activecat
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