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student8's avatar
student8
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2 years ago

Will sending data from serial port to FPGA change the existing layout

I designed a module that uses direct counting to measure signal delay through a circuit. One of the parameters is stored in a register and assigned using an external serial port. I used signal tap to ...
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FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
2 years ago

Do you get unexpected results while the parameter changes or continuously?

Trivial question, is the design fully constrained and meets timing?

  • student8's avatar
    student8
    Icon for New Contributor rankNew Contributor
    2 years ago

    Thank you for your reply.

    Changing the parameter indeed made a difference. The final result is obtained by subtracting the measured circuit delay from this parameter. After the circuit was programmed, I thought the circuit delay would not change anymore. However, transmitting data via serial port actually caused a significant change in the measured circuit delay. I imposed very few restrictions or timing requirements, but I believed that the circuit would not change after programming