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?

[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.

[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

[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]

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.

[Arno1]

can you share your minicom ymodem settings?

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

[EEdwa.1]

Hi Arno,

It show the following messages,

+------------------------------------------------------------------------------+
|     Name             Program                 Name U/D FullScr IO-Red. Multi  |
| A  zmodem     /usr/bin/sz -vv -b              Y    U    N       Y       Y    |
| B  ymodem     /usr/bin/sb -vv -k              Y    U    N       Y       Y    |
| C  xmodem     /usr/bin/sx -vv                 Y    U    N       Y       N    |
| D  zmodem     /usr/bin/rz -vv -b -E           N    D    N       Y       Y    |                                      
| E  ymodem     /usr/bin/rb -vv                 N    D    N       Y       Y    |                                      
| F  xmodem     /usr/bin/rx -vv                 Y    D    N       Y       N    |                                      
| G  kermit     /usr/bin/kermit -i -l %l -b %b  Y    U    Y       N       N    |                                      
| H  kermit     /usr/bin/kermit -i -l %l -b %b  N    D    Y       N       N    |                                      
| I  ascii      /usr/bin/ascii-xfr -dsv         Y    U    N       Y       N    |
| J    -                                                                       |
| K    -                                                                       |
| L    -                                                                       |
| M  Zmodem download string activates... D                                     |
| N  Use filename selection window...... Yes                                   |
| O  Prompt for download directory...... No                                    |
|                                                                              |
|   Change which setting? (SPACE to delete)                                    |
+------------------------------------------------------------------------------+

After Ctrl-A s -> ymodem -> [Select one or more files for upload],

It show the following messages,

After press the Enter, it is still in download mode.

+-----------[ymodem upload - Press CTRL-C to quit]------------+
|Sending: UserApp.sfb                                         |
|Ymodem sectors/kbytes sent: 154/19kRetry 0: Cancelled        |
|                                                             |
|Transfer incomplete                                          |
|                                                             |
| READY: press any key to continue...                         |
|                                                             |
+-------------------------------------------------------------+

Thank you

[Arno1]

setting seems fine. This is mine for B:

/usr/bin/sb -o --ymodem -k -vv

This is my setting from when I had the same issue and haven't touched it in over a year so this may not be the solution (I know not very helpful) but perhaps you can try it.

[Jocelyn RICARD]

You need to activate MINICOM_YMODEM flag.

No need to deactivate the debug mode.

Best regards

Jocelyn