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MK_ABQ's avatar
MK_ABQ
Icon for Contributor rankContributor
3 years ago
Solved

Reset Vector - NIOS

Hello, I have a reference NIOS project in which the reset vector memory is selected as an external flash. I opened platform designer and found the following information. Picture attached below. ...
  • KellyJialin_Goh's avatar
    KellyJialin_Goh
    3 years ago

    Hi MK,

    Greetings and welcome to Intel's forum.

    There is not specific reason why it is greyed out. It is according to the base address you set in Platform Designer. You have the flash address set to 0x10000000, and the offset to 0x08b00000. Therefore, flash will start access at 0x18b00000.


    Hope this clarifies your doubts.

    Thank you.


    Regards,

    Kelly



KellyJialin_Goh's avatar
KellyJialin_Goh
Icon for Frequent Contributor rankFrequent Contributor
3 years ago

Hi MK,

1) The flash in your system starts at 0x10000000 and verified in the address map with your attached screenshot. The offset you selected for the reset vector must be within the range of the flash, and it is.

The board test system is a different design so it is not compatible to your design. Addressing is specific to NIOS processor, which is also your host..


2) This is the address where the NIOS will start running code from and the flash will not be affected. The flash (and the memory that are attached in screenshot of GUI) must be set correctly to start running code from that address.

The flash is already configured on the Development Kit but you can still change it by using the flash programmer tool in Quartus.


Hope this clarifies your doubts.


Thank you.

Regards,

Kelly