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OJin0's avatar
OJin0
Icon for Occasional Contributor rankOccasional Contributor
6 years ago

New Project: ElectricPiano_00_00, Request a review of what's wrong.

This is a new project to identify problems.

(New project: ElectricPiano_00_00)

Hello, Quarters Prime 19.1 behavior is strange.

Attach the project folder.

Request a review of what's wrong.

content of project;

It is a frequency divider for the scale of an electronic piano, and the frequency of each output is completely different from the design intention.

Best regards,

Oksang

8 Replies

  • OJin0's avatar
    OJin0
    Icon for Occasional Contributor rankOccasional Contributor
    6 years ago

    Hello, even when one channel (4C_261) is replaced with a 74160 symbol, the normal frequency (261 Hz) is not output.

    Where are there any problems? (Design? Or symbol? Or compile? Or assemble?)

    I have attached the project folder.

  • SyafieqS's avatar
    SyafieqS
    Icon for Super Contributor rankSuper Contributor
    6 years ago

    Hi Oksan,

    What do you mean the Quartus behavior is strange? Can you elaborate it? Is it only for 19.1 or other version behave the same? Have you tried on other version?

    Thanks,

    Regards

    • OJin0's avatar
      OJin0
      Icon for Occasional Contributor rankOccasional Contributor
      6 years ago

      Hello,

      Right now, I'm using version 19.1 only.

      We found clues that differed between the function of the schematic and the simulation result.

      As below.

      Like Schematic, inst7 (DFF) is normal when triggered on X3 output.

      However, in the currently simulated wave picture, inst7 (DFF) was triggered on X2.

      In the PIN_F12 terminal of the board, 261Hz is output if it is normal as in the schematic, but the current 522Hz signal is actually doubled.

      Why are they different from the schematic and simulation results?

      I have attached the current project folder.

      Thank you.

    • OJin0's avatar
      OJin0
      Icon for Occasional Contributor rankOccasional Contributor
      6 years ago
      Hello, In ElectricPiano_00_00, LPM_COUNTER has no problem at all. 50MHz input, 1/50 divided, 1MHz accurate output. OK. However, there is a problem with the array of four synchronous counters (74160). The output of the 4th counter does not output at the designed frequency. There is an error in the simulation result, and there is also an error in the actual board output. Below is my post on the forum. - Below - " Right now I'm using version 19.1 only. We found clues that differed between the function of the schematic and the simulation result. As below. Like Schematic, inst7 (TFF) should be triggered on X3 output to be normal. However, in the currently simulated wave picture, inst7 (DFF) was triggered on X2. In the PIN_F12 terminal of the board, 261Hz is output if it is normal as in the schematic, but the current 522Hz signal is actually doubled. Why are they different from the schematic and simulation results? I have attached the current project folder. " Thank you.