topic Re: LPC1857 locate part of code in FlashB in LPC Microcontrollers

LPC1857 locate part of code in FlashB

luciano_mortari — Fri, 02 Oct 2020 15:22:55 GMT

I'm using LCP1857 developing with MCUXpresso, the code is near to reach the limit of the FlashA, ( today the code size is near 480kBytes).

I know that's possible to locate functions and constants to FlashB using the directives

__TEXT(Flash2) void function_xxx(uint32_t u32_parameter) {

…}

__RODATA(Flash2) const unsigned char ach_l_Table[dim]={...};

If i'd like to move a library composed by several files to FlashB it's necessary to mark each function and table with the directive or exists a method to locate all the code in a *.c file in FlashB ?

Re: LPC1857 locate part of code in FlashB

Omar_Anguiano — Tue, 06 Oct 2020 18:54:13 GMT

Hello luciano_mortari

This document provides some sample codes and steps for relocating Code and Data into RAM/FLASH. Although the examples are for the Kinetis K64 you may use this as reference:

https://community.nxp.com/t5/Kinetis-Design-Studio-Knowledge/Relocating-Code-and-Data-Using-the-MCUXpresso-IDE/ta-p/1103719

Let me know if this is helpful, if you have more questions do not hesitate to ask me.

Best regards,

Omar

Re: LPC1857 locate part of code in FlashB

luciano_mortari — Wed, 07 Oct 2020 06:36:21 GMT

Ok, tank you,

i know that i have to use the directive __TEXT(Flash2) but, as I have to move a large number of functions in Flash2 , i wondered if there is another method to declare all the functions in a *.c file all located in Flash2 instead of mark each function with __TEXT(Flash2)

Re: LPC1857 locate part of code in FlashB

luciano_mortari — Wed, 07 Oct 2020 06:42:19 GMT

Tank you, i knew this method, but , as I have to move a large number of functions in Flash2, i was wondering if exists another method that allows to declare all the functions in a *.c file all located in Flash2 instead of marking each function with __TEXT(Flash2)

Re: LPC1857 locate part of code in FlashB

converse — Wed, 07 Oct 2020 07:39:47 GMT

You can relocate all functions in a file by changing the linker script - not by changing the source code.

Take a look at this article by SiLabs

https://www.silabs.com/community/mcu/32-bit/knowledge-base.entry.html/2018/06/27/how_to_locate_anent-Uyrh