OTFAD with FlexSPI in code

[AChun]

I am using IMXRT1010EVK board with NXP-MCUBootUtility-v3.5.0.

I use the function “ flexspi_nor_flash_init(EXAMPLE_FLEXSPI)”,

and blink the led after the function.

It failed while i choose OTFAD as my secure Type, I follow 

the post “Use FlexSPI while decrypted with OTFAD”, change code to the the following

 {
 //OTFAD->CR &= ~OTFAD_CR_GE_MASK;
  backupendaddr = OTFAD->CTX[0].RGD_W1;
  OTFAD->CTX[0].RGD_W1 = OTFAD->CTX[0].RGD_W0;
  //flexspi_nor_flash_init(EXAMPLE_FLEXSPI);
  OTFAD->CTX[0].RGD_W1 = backupendaddr;
  //OTFAD->CR |= OTFAD_CR_GE(1);
}

The led blink with OTFAD when i commet the  function “flexspi_nor_flash_init(EXAMPLE_FLEXSPI)”.

data.ldt:

        <#if memory.name=="SRAM_ITC">
        *flexspi_nor_flash_ops.o(.text*)
        *fsl_flexspi.o(.text*)
        </#if>

main_text.ldt:

        *(EXCLUDE_FILE(*flexspi_nor_flash_ops.o *fsl_flexspi.o) .text*)

 The program is in XIP mode.

[jay_heng · Accepted solution]

The issue is caused by FlexSPI reset way, please refer to my blog

https://www.cnblogs.com/henjay724/p/14479276.html

[jeremyzhou]

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
Actually, I'm not very clear with this question, whether you mean the evkmimxrt1170_flexspi_nor_polling_transfer_cm7 can't work well after enabling encrypted XiP with OTFAD.
Have a great day,
TIC

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[AChun]

I'm using the flexspi example code for the IMXRT1010EVK board. Add the blinking code after the function "flexspi_nor_flash_init".

    BOARD_ConfigMPU();
    BOARD_InitBootPins();
    BOARD_BootClockRUN();
    BOARD_InitDebugConsole();
    SCB_DisableDCache();

    flexspi_nor_flash_init(EXAMPLE_FLEXSPI);

    PRINTF("\r\nFLEXSPI example started!\r\n");

    /* Set systick reload value to generate 1ms interrupt */
    if (SysTick_Config(SystemCoreClock / 1000U))
    {
    	while (1);
    }
    while (1)
    {
		if(delay_timer==0)
		{
			delay_timer = 500;
			LED_toggle();
		}
    }

Following the article , I have change the function "BOARD_BootClockRUN()".

It blinks the led If I commet the function "flexspi_nor_flash_init".

Or I change the secure boot Type to "HAB signed Image Boot".

How can it work on OTFAD Mode with the flexspi_nor_flash_init and blinky in code?

[jeremyzhou]

Hi,
Thanks for your reply.
Firstly, I'd like to know your Advanced Key Settings, next, in the flexspi_nor_polling_transfer demo, the flexspi_nor_flash_init will be relocated to the RAM after booting up, so it shouldn't be affected by the restriction mentioned in the article.

jeremyzhou_0-1656922179485.png

Have a great day,
TIC

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[AChun]

Here is the NXP-MCUBootUtility-v3.5.0. "Advanced Key Settings".

Advanced Key Settings.png

The setting is work (led blinky) when I commet the function "flexspi_nor_flash_init".

Also, I confirm the map,  the function "flexspi_nor_flash_init"  is definitely located in RAM.

flexspiinram.png

[jeremyzhou]

Hi,
Thanks for your reply.
Can you share the read result of eFuse in the NXP-MCUBootUtility-v3.5.0?
@jay_heng  Can you share some insight into the phenomenon?
Have a great day,
TIC

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[AChun]

The fuse is got here.

fuse_setting.png