LPC MicrocontrollersのトピックRe: LPC17xx using AHB_RAM_MEMORY for general purposes

LPC17xx using AHB_RAM_MEMORY for general purposes

castle — Wed, 03 Feb 2021 09:37:51 GMT

Hello,

I would like to use AHB_RAM_MEMORY SRAM banks 0 and 1 as a general purpose ram. As I understand bank0 (0x2007 C000 - 0x2007 FFFF) is used for USB and bank1 (0x2008 0000 - 0x2008 3FFF) is used for Ethernet.

Can I use Bank0 if my code does not implement any USB interface? Also, if my code uses Ethernet, can I use a part of Bank1 i.e. (0x2008 2000 - 0x2008 3FFF) of less? As I see at LPC17xx user manual, Ethernet uses (0x2008 0000 - 0x2008 1FFF). Please correct me if I am wrong.

Thanks

Re: LPC17xx using AHB_RAM_MEMORY for general purposes

ZhangJennie — Fri, 05 Feb 2021 05:29:52 GMT

SRAM is interfaced with the Advanced High-performance bus (AHB). You can use it as generally purpose.

Have a nice day

Jun Zhang

Re: LPC17xx using AHB_RAM_MEMORY for general purposes

frank_m — Fri, 05 Feb 2021 08:36:40 GMT

Just as a comment, you might want the review your projects's linker scripts and possible modify it to use of this RAM sections properly.

Re: LPC17xx using AHB_RAM_MEMORY for general purposes

castle — Mon, 22 Mar 2021 12:35:33 GMT

Thanks. My program does not use CAN, but as I can see, there is an address with memory size 0x800

0x40038000 0x0800

Could I use these RAM for general purpose like AHB?