topic Re: DIP Switch Overrides in i.MX Processors

DIP Switch Overrides

pilotnite — Sun, 29 Sep 2024 23:34:37 GMT

Support,

We are currently working on a project where we need to change the boot media from eMMC to SPI flash. However, physically accessing the hardware to adjust DIP switch settings is not feasible in our situation.

Is there any way to change the boot media via software, specifically using the uuu utility, by burning fuses that would override the DIP switch settings? We are interested in a solution that avoids the need for physical changes to the hardware.

Any guidance or recommendations would be greatly appreciated.

Thank you for your assistance.

Re: DIP Switch Overrides

JorgeCas — Mon, 30 Sep 2024 17:17:02 GMT

Hello,

It is need hardware to change boot mode. If your board is not flashed, it will go automatically to serial download mode. Then you can configure fuses and do a permanent change in fuses to SPI flash.

Best regards.

Re: DIP Switch Overrides

pilotnite — Mon, 30 Sep 2024 18:23:14 GMT

@JorgeCas

Thanks for your feedback.

Can you please elaborate more on how to configure the fuses?

Re: DIP Switch Overrides

JorgeCas — Mon, 30 Sep 2024 18:46:39 GMT

Sure, I suggest you take a look in the next link.

Best regards.

Re: DIP Switch Overrides

pilotnite — Mon, 30 Sep 2024 18:55:35 GMT

@JorgeCas

Thanks for the link. Is this same for i.mx93?

Re: DIP Switch Overrides

JorgeCas — Mon, 30 Sep 2024 19:03:30 GMT

I apologize, I got confused with the label in your post.

It is similar, it does not use SCFW API functions and fuses arrays are different. Programing eFuses using U-Boot is the same.

Please check this link.

Best regards.

Re: DIP Switch Overrides

pilotnite — Mon, 30 Sep 2024 19:15:28 GMT

@JorgeCas

Just to reiterate, I'm looking for instructions for i.mx93, on how to set boot mode to SPI boot from eMMC without changing DIP switches.

Re: DIP Switch Overrides

pilotnite — Mon, 30 Sep 2024 22:15:31 GMT

@JorgeCas

Thank you for your feedback and for sharing the link.

I’m still working to find the best solution and want to avoid any risk of bricking the devices during the process. Is there any way you can assist in determining the correct fuse to burn in order to achieve the desired setup?

Specifically, for the i.MX93, I need to change the boot media from eMMC to SPI. Can this be done through U-Boot or the uuu utility? If so, could you please provide the exact commands and values needed to implement this change?

I appreciate your help and guidance.