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mjobbeh's avatar
mjobbeh
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3 years ago

nios fpga

We are working on a Nios system targeting a DE2-115 kit. When running the code on SDRAM (Run As -> Nios II Hardware), the code is executed in the required speed, but when loading the code from EPCS memory (sof + elf file), the code execution suffers from delay issues. We tried to choose the boot copier method that copies the Nios II processor application “from EPCS memory to RAM” by leaving unchecked all BSP settings in Settings.Advanced.hal.linker, but the code is still suffering from performance issues. It leads us to the conclusion that the code is still executing-in-place from EPCS memory. Please find attached to this message some figures showing our Nios settings.

5 Replies

  • hareesh's avatar
    hareesh
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    3 years ago

    Hi,

    we are working on this issue, and

    how are you saying code code execution suffers from delay issues.


  • mjobbeh's avatar
    mjobbeh
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    3 years ago

    Hi .

    because we think code run on EEPROM (EPCS) instead of SDRAM, when it run , it take dealy about 10 to 20 second to execute instruction while take less than 1 second when run on SDRAM.

  • hareesh's avatar
    hareesh
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    3 years ago

    Hi,

    please check your linker scripts, because there you can select the where you have to execute the code. so once check in your linker script.


    • mjobbeh's avatar
      mjobbeh
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      3 years ago

      I tried all Linker script options, but i had the same problem,Does the schematic of de2-115 board or the size of code affect the load of code from EEPROM.

  • hareesh's avatar
    hareesh
    Icon for Frequent Contributor rankFrequent Contributor
    3 years ago

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