PROCESSOR-SDK-J721S2: Bootable USB

Hi krishnan,

krishnan Manivannan said:

Is there support in SBL needed?

There is no driver support for USB in SBL.

krishnan Manivannan said:

How to boot j721s2 board with a Bootable USB device?
what are pin settings for booting from usb?

Only DFU boot mode is supported using USB interface 

https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-j721s2/10_00_00_08/exports/docs/linux/Foundational_Components/U-Boot/UG-DFU.html#usb-device-firmware-upgrade-dfu

For pin configuration please check  "Boot Mode Pins" chapter of the TRM.If you are using EVM you can use below DIP switch configuration 

Ref:https://www.ti.com/lit/an/spracy5/spracy5.pdf?ts=1729574580384

Regards
Diwakar

Hi Diwakar,

We are tried to use this DFU mode flashing. But we are getting below errors while loading the binary:

dfu-util: Invalid DFU suffix signature
dfu-util: A valid DFU suffix will be required in a future dfu-util release!!!
dfu-util: No DFU capable USB device available

Please let me know the solution on the same

Thanks in advance

Regards,
Salih

Hi Salih

As you can seen your HOST  is unable to see any available dfu device did you make sure you are using correct boot pin configuration ?

Are you using custom board or TI EVM.

Regards
Diwakar

Hi Diwakar,

Thanks for your inputs. We have tried with the procedures as mentioned in the document and I have changed boot switch for DFU.
The DFU is detected in our host and we can able to boot it at first time. When we tried to flash it in OSPI, we are failed to do it. Since the DFU USB is not detecting after the below commands fired on the EVM board:

Please give your inputs on the same. We have set the below switch settings for DFU


Regards,
Salih

Hi Salih,

Can you raise the new thread for this as the original question is already answered.

Regards
Diwakar