topic LPC4357 bootloader dump in LPC Microcontrollers

LPC4357 bootloader dump

pieroquark87 — Wed, 14 Sep 2022 14:16:28 GMT

Hi there,

I would like to know if is it possible to dump the bootloader flashed on the internal ROM of the LPC4357 tracing back to the corresponding bin file.

Many thanks in advance.

Giovanni

Re: LPC4357 bootloader dump

Pavel_Hernandez — Wed, 14 Sep 2022 23:39:06 GMT

Hello,

No, you can't put your own bootloader in the ROM, the ROM already has the definite bootloader and can't be erased before out of the factory.

If you want to use the customized bootloader, you should put it in front of the flash.

Best regards,
Pavel

Re: LPC4357 bootloader dump

pieroquark87 — Thu, 15 Sep 2022 10:00:44 GMT

Hi, yes, sorry, I said that badly. I meant I've loaded onto the flash A memory a custom bootloader using the Ulink Pro. After that if, for example, I give the board to you, is there a way you can trace back to the corresponding bin file of the custom bootloader I've loaded?

Re: LPC4357 bootloader dump

Pavel_Hernandez — Thu, 15 Sep 2022 19:54:51 GMT

Hello,

Yes, sure, but are you interested in locking the MCU?

Best regards,
Pavel

Re: LPC4357 bootloader dump

pieroquark87 — Fri, 16 Sep 2022 06:15:10 GMT

Hi, thanks for your reply. How do you make to trace back to the custom bootloader bin?

Re: LPC4357 bootloader dump

Pavel_Hernandez — Mon, 19 Sep 2022 23:07:16 GMT

Hello,

What do you mean with |trace back|? Is that for TRACE or Reverse engineering?

I meant I've loaded onto the flash A memory a custom bootloader using the Ulink Pro. After that if, for example, I give the board to you, is there a way you can trace back to the corresponding bin file of the custom bootloader I've loaded?

I think we have different understanding could you please elaborate further?

If you want to use a secure bootloader I think this app note maybe could help you.
[Secure Bootloader implementation (nxp.com)] [Firmware Update Using Secondary Bootloader (nxp.com)]

Best regards,
Pavel