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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



sstrell's avatar
sstrell
Icon for Super Contributor rankSuper Contributor
3 years ago

1) As already stated, the flash in your system starts at 0x10000000 and verified in the address map you've shown. The offset you've selected for the reset vector must be within the range of the flash, and it is. The board test system is a completely different design so its setup doesn't apply to your design. Addressing is specific to the host you connect to, in this case, the Nios processor.

2) This is the address where the Nios will start running code from. It doesn't do anything to the flash. The flash (or whatever memory is attached) must be set up appropriately to start running code at that address. On the dev kit, the flash is already configured though you can change it if you want to using the flash programmer tool in Quartus.