I have downloaded the X-CUBE-SBSFU V2.4.0 and build project NUCLEO-G071RB. It works and can download firmware from Tera Term's ymodem send. Can we use only Tera Term? Do any other tools be used for download firmware?

[EEdwa.1]

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[Jocelyn RICARD]

Hello,

the SBSFU package provides and example of secure boot and secure firmware update.

This example implements the Ymodem protocol.

It you want to use another interface and/or protocol, you have to implement it.

The implementation of Ymodem protocol should help you understanding what needs to be changed.

Best regards

Jocelyn

[Arno1]

On linux I use minicom which uses sb to send files using the YMODEM protocol.

I've had to split the debug output from the update communication by using a different UART for each. I suppose TeraTerm is better able to filter out other data on the bus that is not used for YMODEM.

[EEdwa.1]

Hi Arno,

So can you download firmware successfully by minicom?

I have try to comment "#define SFU_DEBUG_MODE" in app_sfu.h

And try to download firmware by minicom, but failed.

Should I need to modify anything else?

Thank you

[Arno1]

can you share your minicom ymodem settings?

Ctrl-A Z -> O (configure) -> File Transfer protocols

[Jocelyn RICARD]

Hello Arno,

this is not better with Teraterm. This is the limitation of this solution.

When downloading a new firmware through Ymodem, you lose the traces.

When it is needed to debug this specific part, I use a UART protocol analyzer connected to Rx and Tx.

Best regards

Jocelyn

[Arno1]

I'm going off of memory here as it's been a while but the splitting was more to see traces while testing ymodem uploads.

But that indeed may not have been the reason why things worked.