s32k144 CSEC_DRV_Init SDK function question

[kmh48301]

Hi

I found after CSEC_DRV_Init() function called, Flash Drv functions don't work.

I tried csec_keyconfig_s32k144 example project.

And I add some flash drv code for test.

And I run this project in Debug_Flash mode.

when I run 'Flash_DRV_EraseSector()', this exception is occurred.

And when I run this project in Debug_RAM mode, it just works normally.

Plus when I don't excecute 'CSEC_DRV_Init', it also works normally.

I already tried 'CSEC_DRV_Deinit'. But same exception was occurred.

** Secure Boot is activated on my board. **

Thanks

Best Regards

Phillip

[lukaszadrapa]

Hi Phillip,

the problem is that CSEC_DRV_Init() starts the OSIF / Systick. Erase operation takes relatively a lot of time, so OSIF / Systick interrupt is triggered during the erase. If you run the code from RAM, it is not problem. If you run the code from flash, it leads to read-while-write error because it is not possible to access the program flash during erase operation.

Solution is to disable interrupts by PRIMASK during the erase or disable OSIF / Systick.

Regards,

Lukas

[kmh48301]

Hi Lukas.

Thank you so much for your reply.

I have two more questions.

1. Does CSEC use OSIF? Why?

When I delete the "OSIF_TimeDelay(0U);" in "CSEC_DRV_Init", Flashing works well.

2. Can you please let me know how to disable interrupts by PRIMASK during the erase

    or disable OSIF / Systick?

Thanks

Best Regards

Phillip

[lukaszadrapa · Accepted solution]

Hi Phillip,

the CSEc driver uses OSIF for timeouts. You can check the source code.

To disable Systick, you can use:

S32_SysTick->CSR = S32_SysTick_CSR_ENABLE(0u) | S32_SysTick_CSR_TICKINT(0u);

To disable/enable interrupts, you can use:

ENABLE_INTERRUPTS();   //  or __asm("cpsie i");

DISABLE_INTERRUPTS();  //  or __asm("cpsid i");

Regards,

Lukas