LPC54S018M without external SDRAM and XIP image

anandkrs — Mon, 13 Jul 2020 19:32:35 GMT

I have a board based on the LPC54S018M (4MB internal ROM) and with no external SDRAM

I am able to test a sample application (lwip_dhcp) from the SDK, And this sample application looks like a non-XIP based image.

Now when I convert the image to XIP image with with these macro "XIP_IMAGE" & "IMG_BAUDRATE=96000000"

and use the below linker file settings

HEAP_SIZE = DEFINED(__heap_size__) ? __heap_size__ : 0x0400;
STACK_SIZE = DEFINED(__stack_size__) ? __stack_size__ : 0x0800;

IMAGE_START_ADDR = DEFINED(XIP_IMAGE) ? 0x10000000 : 0x00000000;
DATA_START_ADDR = DEFINED(XIP_IMAGE) ? 0x00000004 : 0x20000000;
TEXT_SECTION_SIZE = DEFINED(XIP_IMAGE) ? 0x000FFE34 : 0x0002FE00;
DATA_SECTION_SIZE = DEFINED(XIP_IMAGE) ? 0x0002FFFC : 0x00028000;

With the XIP Image it's didn't even print the messaged after board & uart initialization.

Would like to know if its possible to run XIP image on the LPC54S018M based board with out the external SDRAM.

Also I couldn't understand the difference between the image mapping between XIP & non-XIP image in this case.

Appreciate for any pointer / help in this regard.

Re: LPC54S018M without external SDRAM and XIP image

Alice_Yang — Fri, 16 Dec 2022 06:16:14 GMT

Hello Anand Singh,

XIP: eXecute In Place

meaning process image directly in FLASH.

NO-XIP meaning copy image from FALSH to RAM to run.

About change no-xip to XIP, if you use MCUXpresso IDE, try to disable "Plain load image" , the re-build.

And if you haven't SDRAM, you need config the data in SDRAM to other RAM.

Regards

Alice

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LPC54S018M without external SDRAM and XIP image

Re: LPC54S018M without external SDRAM and XIP image