LPC55S69 : writing and reading on internal flash with trustzone

mashraf — Wed, 22 Feb 2023 10:21:05 GMT

i have two projects (secure and non secure) with trustzone, now I was trying to write on the internal flash from the secure code, as soon as the call to flash_init is made, the debugger jumps to the hardfault handler with the IBUSERR(0) Instruction bus error.

i checked this ticket:

https://community.nxp.com/t5/LPC-Microcontrollers/LPC55S69-Using-Flash-driver-in-TrustZone/m-p/1012192

i did these changes:

1- changed clock to be 96_MHZ

2- switched the entire Boot ROM memory region (0x13000000 - 0x1301FFFF) from NS-User to S-Priv

3- set the ANACTLR, FLASH, GPIO, INPUTMUX and PRINCE slaves to security level S-Priv

still getting same hardfault handler with the IBUSERR(0) Instruction bus error.

Re: LPC55S69 : writing and reading on internal flash with trustzone

RaRo — Fri, 24 Feb 2023 16:47:02 GMT

Hello @mashraf,

Could you please take a look at the following information?

Hope these helps you.

Best regards, Raul.

topic Re: LPC55S69 : writing and reading on internal flash with trustzone in LPC Microcontrollers

LPC55S69 : writing and reading on internal flash with trustzone

Re: LPC55S69 : writing and reading on internal flash with trustzone