LPC MicrocontrollersのトピックRe: LPCXpresso SPIFI RTOS example

LPCXpresso SPIFI RTOS example

primate — Sat, 10 Mar 2018 15:22:33 GMT

Hi,

I have a LPCXpresso54628 board and I was wondering does anybody have an example how to implement SPIFI into FreeRTOS? If no, any ideas how to implement it (taking the lpcxpresso54628_driver_examples_spifi_spifi_dma_transfer as a reference?

Thank you for any help.

Re: LPCXpresso SPIFI RTOS example

jeremyzhou — Wed, 14 Mar 2018 02:39:34 GMT

Hi primate，

Thank you for your interest in NXP Semiconductor products and

for the opportunity to serve you.

According to your statement, you'd like to execute the FreeRTOS task in the SPIFI flash, however the code execution performance only up to 60~70% of internal flash performance when code runs in the the SPIFI flash.

So I don't think the proposal is good.

Have a great day,

TIC

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Re: LPCXpresso SPIFI RTOS example

primate — Thu, 15 Mar 2018 18:07:15 GMT

Hello jeremyzhou,

Thank you for the answer.

What would be a better solution in your opinion for using the on-board Quad-SPI flash in FreeRTOS?

I have a project running FreeRTOS where one of the tasks is to take a user input and store it on flash (for later use). One of the inputs is also user settings which would be taken on board power-up.

Have a nice day

Re: LPCXpresso SPIFI RTOS example

jeremyzhou — Fri, 16 Mar 2018 06:23:34 GMT

Hi primate,

Thanks for your reply.

If the SPIFI flash is just used to store some data and the internal flash is assigned the application code.

Definitely, it's available.

However you need to initialize the SPIFI flash prior to create the tasks in RTOS.

Hope it helps.

Have a great day,

TIC

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Note: If this post answers your question, please click the Correct Answer button. Thank you!

Re: LPCXpresso SPIFI RTOS example

primate — Sun, 18 Mar 2018 11:28:56 GMT

Dearjeremyzhou,

I did intialize the SPIFI (like in the DMA SPIFI example) prior to RTOS task but every time I want to write something it hangs at:

SPIFI_SetMemoryCommand(SPIFI0, &command[READ]);

BTW is that function really needed?

Jut to let you know that I have managed to port the polling SPIFI example into my RTOS project and it works relatively OK (sometimes the data is not written into memory like it should and I will need to sort out why). EDIT: looks like a vTaskDelay(5); was needed before enable_quad_mode();

To clarify even further just to see the whole picture:

I am using lwIP RTOS where, among other things, the user can enter some data
That data should then be stored into SPIFI flash
As for the project first everything is intialized and the lwIP task is called
- within lwIP there is also a init function where I have put the function

                    enable_quad_mode();

I am not sure do I need to put the that function prior to the RTOS task since it works in the RTOS SPIFI polling example.

If you need any more info please let me know.