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Paul83's avatar
Paul83
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2 years ago

read/ write with IORD_32DIRECT and IOWD_32DIRECT problem

Hi All, I am using the quartus pro 23.4 with Asling 23.4.1 I have used the avalon_slave bus in my own module. After building the BSP and I try to run the IORD_32DIRECT (base_address) or even IOWD_3...
Embedded Applications Layer
Nios Architecture
Nios Cpu
symmt_Intel's avatar
symmt_Intel
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2 years ago

Hi Paul,


Could you confirm the following?

  1. Please decrease the clock to for example 50MHz and run? I'm wondering if the design meets the timing.
  2. What is the frequency of JTAG? Please see if decreasing it to 6MHz works.
  3. What is the target memory you are trying to access? Is it a custom memory?


Best regards,

Sho Yamamoto


  • Paul83's avatar
    Paul83
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    2 years ago

    Hi Sho,

    Thanks of your reply. According to your suggestion

    1. Please decrease the clock to for example 50MHz and run? I'm wondering if the design meets the timing.

    Try to decrease the clock with lower frequency e.g it give the same situation.

    1. What is the frequency of JTAG? Please see if decreasing it to 6MHz works.

    Yes, I tried to use the lower clock rate on JTAG with 6MHz, it also give the same situation.

    1. What is the target memory you are trying to access? Is it a custom memory?

    My target is to access the custom module (custom made interface with 16bit address bus - as there are different register or memory in this interface)

    I am look on the Nios V cache memory. It seems that it use 32bytes (8 words) per cache line. Don't know it is related to the cache memory to give multiple read/write pulse.

    Thanks

    Best regards,

    Paul