topic Re: locking OCTOP_GP1 OTP register in i.MX Processors

locking OCTOP_GP1 OTP register

Anushree_Shetty — Sat, 09 Sep 2023 11:30:25 GMT

Hi,

We are using imx6ull processor, we have requirement of writing to OCOTP_GP1 register only once and locking the register so that even the bit which 0 should not be changed in future.

From nxp document we found that using OCOTP_LOCK register,we can lock the OCOTP register,but we are not able write to this register from user space.

Could please let us know if there is any way to lock the OCOTP_GP1 register after writing once from user space

Regards,

Anushree

Re: locking OCTOP_GP1 OTP register

joanxie — Sat, 09 Sep 2023 12:40:51 GMT

pls refer to the link as below:

"https://imxdev.gitlab.io/tutorial/Burning_eFuses_on_i.MX/"

refer to the reference manual, chapter 35.5.11 Value of OTP Bank0 Word0 (Lock controls)
(OCOTP_LOCK)

Re: locking OCTOP_GP1 OTP register

Anushree_Shetty — Mon, 11 Sep 2023 04:25:26 GMT

Hi Joanxie,

Thanks for the reply.

I'm not able to open the link you shared. I'm getting "page not found" as below

Regards,

Anushree

Re: locking OCTOP_GP1 OTP register

joanxie — Mon, 11 Sep 2023 05:39:09 GMT

just remove " in the end of link, try again

https://imxdev.gitlab.io/tutorial/Burning_eFuses_on_i.MX/