topic XIP and NON-XIP data transfer clarfication in LPC Microcontrollers

XIP and NON-XIP data transfer clarfication

VIGNESH_BABU — Thu, 15 Dec 2022 07:25:54 GMT

Hi;

I was currently worked in LPC54018 customized Board.My Project is to display the font in the TFT Display (ST7789V).In our controller default don't have an internal flash Memory.So we install the External NOR Flash Memory(W25Q128JV) to interface with the Micro-controller and it is connected through TFT Display.

Doubts?

1.I have a doubt how the data was transfer whether through(External NOR flash -> SRAM -> TFT Controller[XIP METHOD]) or (External NOR Flash -> TFT Controller with the help of DMA[NON-XIP]).

2.How I was identified the path of data transfer in MCUXPresso Whether it was XIP or NON-XIP method?

Re: XIP and NON-XIP data transfer clarfication

Alice_Yang — Fri, 16 Dec 2022 06:24:23 GMT

Hello @VIGNESH_BABU

XIP is execute directly in flash, no-xip is copy from flash to SRAM to execute.

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

Also there is XIP and NO-xip demo under SDK for lpc54s018, you can run them to check the process.

Alice

Re: XIP and NON-XIP data transfer clarfication

VIGNESH_BABU — Fri, 23 Dec 2022 11:53:17 GMT

Hi Alice,

Finally I got the clarification of differences between XIP and NO-XIP. Thank you Alice.