Unable to configure TAMPER pins

priteshpatel — Thu, 21 Jun 2018 14:17:49 GMT

I want to use TAMPER functionality to wakeup iMX6ULL from SNVS mode whenever i get some event on SNVS_TAMPER7. For this i read the fuse bits from uboot which gives me the following result

=> fuse read 0 3

Reading bank 0:

Word 0x00000003: 713000ab

As per my understanding, this HEX value corresponds to using TAMPER pins as GPIO(referring IMX6ULLRM). So in order to use TAMPER7 as TAMPER, I am trying to write bits[21:20] as 1:0 using following command.

=> fuse prog 0 3 712000AB

But this doesn't allow me to do so.It gives me Error in accessing the register

=> fuse prog 0 3 712000AB

Programming bank 0 word 0x00000003 to 0x712000ab...

Warning: Programming fuses is an irreversible operation!

This may brick your system.

Use this command only if you are sure of what you are doing!

Really perform this fuse programming? <y/N>

mxc_ocotp fuse_prog(): Access protect error

ERROR

Can anyone please help me with this?

Re: Unable to configure TAMPER pins

igorpadykov — Fri, 22 Jun 2018 00:26:31 GMT

Hi Pritesh

there is no tamper pin function on i.MX6ULL so the fuses are programmed,

TAMPER0-9 are used as GPIO.

Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

i.MX ProcessorsのトピックUnable to configure TAMPER pins

Unable to configure TAMPER pins

Re: Unable to configure TAMPER pins