LPC5528 SRAM3 hardfault

[alex__]

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]

Hello Alex,

Have you define the SRAM3 space in memory detail:

Regards,

Alice

[alex__]

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]

Hello Alex,

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

Regards,

Alice

[alex__]

Hello Alice, here it is.

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

[alex__]

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

Thank you.

[Alice_Yang]

OK, thanks!

[converse · Accepted solution]

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__]

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

Thank you.