LPC MicrocontrollersのトピックHow to run an example project from board-SDRAM

How to run an example project from board-SDRAM

Sebastiano65 — Thu, 15 Apr 2021 12:25:44 GMT

Hi, I've a LPC54628 board. I'm not able to run an example project (already available in sdk) in the board-SDRAM.

While in the internal memory everything works.

Any advice?

Re: How to run an example project from board-SDRAM

frank_m — Thu, 15 Apr 2021 13:54:45 GMT

There is a setting "Link application to RAM" in C/C++build->Settings, which you might try.

I am not familiar with the method that MCUXpresso supports for RAM execution, but know of other IDEs supporting a direct load via the debugger. Otherwise, the code is flashed, and copied to RAM at runtime.

Anyway, I suppose this method will not work for many projects. First, the RAM is much smaller than the Flash, so the code size is quite limited. And second, code than needs to share the RAM with data and stack.

I used RAM-based execution only for special purposes, like flashing routines in a bootloader with single-bank Flash.

Re: How to run an example project from board-SDRAM

xiangjun_rong — Fri, 16 Apr 2021 00:59:40 GMT

Hi, Sebastiano,

I suppose that you do not initialize the MPU module, pls refer to an12423.pdf

https://www.nxp.com.cn/docs/en/application-note/AN12423.pdf

Hope it can help you

Xiangjun Rong