RT1170: NOR Flash Error While XIP

[Deer]

As i.MXRT117x has no onchip flash can be used by programmer,

we need to store program on an external flash.

I extend a Serial NOR Flash ( MX25UW6445G ) via FlexSPI,

to store and execute the program ( XIP ).

But if some error happened on FlexSPI,

It was hard to record or locate the error,

because the vector-table and **Fault Handlers are all on the NOR Flash.

To solve this problem,

I tried to link the vector-table and **Fault_Handlers into the OCRAM,

And set bit0 ( SWRESET ) of the reg ( FLEXSPI1 MCR0 ),

to reset the FlexSPI1.

But it still did not enter any exception handling function

(HardFault_Handler / BusFault_Handler / NMI_Handler / MemManage_Handler / UsageFault_Handler).

I'm sure that vector-table and **Fault_Handlers had been linked to OCRAM by reading map file,

and setted SCB->VTOR to right address in OCRAM.

So does anybody know why any exception handling function not called?

[jeremyzhou]

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
1) So does anybody know why any exception handling function is not called?
-- According to your statement, the rode is running in the external flash that connects the FlexSPI1, and the code will set the set bit0 ( SWRESET ) of the reg ( FLEXSPI1 MCR0 ) to reset, is my understanding right? If yes, it's impossible to enter any exception handling function, even if relocate the vector map into the RAM.
Have a great day,
TIC

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