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Altera_Forum
Honored Contributor
9 years agoOutputs from decimatingCIC are shifted (i.e. input at channel c2 appears at c0)
Hi everyone, I have a problem with the Decimating CIC filter with multi-channel input, generated by DSP Builder. The settings are as following: Input Rate per Channel/MSPS : 20 Number o...
Altera_Forum
Honored Contributor
9 years agoHello kaz,
Thank you very much for your reply. I attached the filter report in this comment. If I under stand it correctly I need to put 32 channels in both serial and parallel. like this: Input Data Format (Repeats every 5 clock cycles) <c00><c01><c02><c03><c04> <c05><c06><c07><c08><c09> <c10><c11><c12><c13><c14> <c15><c16><c17><c18><c19> <c20><c21><c22><c23><c24> <c25><c26><c27><c28><c29> <c30><c31><c32><c33><c34> I put every 5 data in series and there are 7 of these serialized signals I fed to the CIC filter. I expect the output signals to be like what it is specified in the report: Output Data Format (Repeats every 160 clock cycles) <c00><c01><c02><c03><c04><c05>.......<c30><c31><---><---><---><--->..... However, What I got is something like.. <c01><c02><c03><c04><c00><c05>.......<cxx><cxx><---><---><---><--->..... The order of the data seems to be shifted. Thank you.