Code protection

RE: Code protection

kclamb2015@gmail.com — Wed, 24 Jan 2024 23:46:53 GMT

That post's code locked it up nice 'n tight. Thanks!

RE: Code protection

Amanda Hsieh — Tue, 23 Jan 2024 18:03:27 GMT

Access port protection is enabled by writing UICR.APPROTECT to Enabled and performing any reset.

Access port protection is disabled by issuing an ERASEALL command via CTRL-AP. This command will erase the flash, UICR, and RAM, including UICR.APPROTECT. Erasing UICR will set UICR.APPROTECT value to Disabled. CTRL-AP is described in more detail in CTRL-AP - Control access port.

There is an example code in this post.

RE: Code protection

kclamb2015@gmail.com — Tue, 23 Jan 2024 17:10:40 GMT

Is there a way to embed this read protection into application .hex or bootloader .hex. And not to have to plug each one up to jtag in order to do this? That way we can flash devices en masse?

RE: Code protection

Amanda Hsieh — Tue, 23 Jan 2024 16:18:21 GMT

I think so. Then, you can use the command "nrfjprog --rbp ALL" to enable the readback protection mechanism.

RE: Code protection

kclamb2015@gmail.com — Mon, 22 Jan 2024 21:38:21 GMT

the top of the chip reads;

N52811

QCAAA0

2242AF

I take it that means it's revision 1; Ax0?

RE: Code protection

Amanda Hsieh — Mon, 22 Jan 2024 21:25:38 GMT

Hi,

See SoC revisions and variants

-Amanda H.

RE: Code protection

kclamb2015@gmail.com — Mon, 22 Jan 2024 21:21:32 GMT

Not sure where to locate the "build codes"

Is this what you mean?

NRF52811-QCAA-R

So if I understand this (which is an overstatement) - it inherently protects it unless otherwise disabled/changed?

Thanks,

Kevin Lamb

RE: Code protection

Amanda Hsieh — Mon, 22 Jan 2024 19:18:23 GMT

Hi,

What build codes of nRF52811 are you using? You can take a look at the nRF52811 Access port protection.

Regards,
Amanda H.