topic LPC5528 SRAM3 hardfault in LPC Microcontrollers

LPC5528 SRAM3 hardfault

alex__ — Thu, 19 Nov 2020 11:00:38 GMT

I am trying to write some data for SRAM 3 region, which locates at 0x2003 0000 accroding to User manual.

But this results in hardFault. Any other regions of SRAM work properly.

Here is example of my code:

Stack, data and heap placed in SRAM 0, so, region 3 should be free.

Alice_Yang — Fri, 20 Nov 2020 03:16:49 GMT

Hello Alex,

Have you define the SRAM3 space in memory detail:

Regards,

Alice

alex__ — Fri, 20 Nov 2020 10:02:42 GMT

At default configuration there is no SRAM3 (RAM from 0x2000 0000 to 0x2003 0000 is SRAM 0,1,2 in user manual).

I have added SRAM3 by increasing size:

But nothing changes.

Alice_Yang — Tue, 24 Nov 2020 06:38:30 GMT

Hello Alex,

Please share your whole project, I will help to check it on my side, thanks.

Regards,

Alice

alex__ — Wed, 25 Nov 2020 14:47:02 GMT

Hello Alice, here it is.

Code with SRAM3, where MCU is hardfaulting, located at the beginning of the main().

converse — Wed, 25 Nov 2020 15:03:22 GMT

According to the data sheet, LPC55S28 does not have SRAM3 (which is probably why it was missing in the original project setup).

LPC55S28 is a device with total ram of 256k, and such devices do not have SRAM3. See attached screenshots from the data sheet and user manual.

alex__ — Wed, 25 Nov 2020 15:26:28 GMT

Yeah, I think you are right. I just thought that usb-ram and ram-x is not included into 256k size.

Thank you.

alex__ — Wed, 25 Nov 2020 15:27:49 GMT

Alice, I think that this issue is resolved and you don't need to check my project.

Thank you.

Alice_Yang — Thu, 26 Nov 2020 06:44:22 GMT

OK, thanks!