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Altera_Forum
Honored Contributor I
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how to create contraints on input data and clock

Hi 

please guide me in the following problems 

I have created a design which runs perfectly with Modelsim and i get the corrrect result what i expect. 

but when i put this design on FPGA (CYCLONE II) ON DE2 BOARD and wrote a vhdl code on nios II to input the data to my design it is not giving me the correct result 

  1. my design expect a a 53 byte packet at the input port, one byte at Avery clock cycle and should accept the data at rising clock 

  2. i really dont know how to do this in my NIOS II PROGRAM 

  3. i check the output in signalTap 

  4. do i require to give some constraint on my clock and input data 

 

 

thank you
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