About MBax.2

MBax.2 · 2023-02-27

I ran into a small footnote in AN3155 stating "System reset is called only for some STM32 BL (STM32F0/F2/F4/F7) and some STM32L4 (STM32L412xx/422xx, STM32L43xxx/44xxx, STM32L45xxx/46xxx) products."Now I run into the problem that after flashing the fi...

MBax.2 · 2022-07-22

Hi,I have a product which runs an application that uses SBSFU on a STM32. The product is battery powered by a small battery. After the small battery is almost depleted, it charges itself by drawing power from a larger external battery. If however tha...

MBax.2 · 2022-07-01

@Jocelyn RICARD I've built, installed and used SBSFU to successfully update the firmware through the serial terminal with a YModem transfer. This update was from version "0" to version "1". Now I have built a new version "2" which only differs from ...

MBax.2 · 2022-06-24

I am using the KMS of SBSFU to store my TLS certificates during the provisioning process. When I flash a new user firmware application the certificates inside the KMS are deleted too. So each time I want to run new user firmware, I have to go through...

MBax.2 · 2022-01-27

I have an undefined reference error to several secure engine functions, for example SE_APP_GetActiveFwStateI have read this thread:https://community.st.com/s/question/0D53W000017PGUKSA4/how-to-call-secureengine-functions-from-my-applicationAnd what I...

MBax.2 · 2023-02-27

I already fixed it. It was a syntax error in my command line command when calling STM32CubeProgrammer_CLI The correct approach is to use the go command and jump to 0x0800000 in order to reset.in order to program, verify and reset in one command use:S...

MBax.2 · 2022-07-23

I've increased the hardware battery protection hysteresis which resolves the device getting stuck in an endless SBSFU loop of "WARNING: A Reboot has been triggered by a Firewall reset!". I do think however that this is unrelated to the problem I have...

MBax.2 · 2022-07-22

While attempting to set something up to reproduce this problem consistently, I ran into another SBSFU issue, possibly related. When the battery drops below a critical level. The supply voltage is cut off to prevent deep discharge. This also cuts the ...

MBax.2 · 2022-07-22

After my firmware boots, it checks the firmware state with SE_APP_GetActiveFwState and if needed it calls SE_APP_ValidateFw to mark the firmware as valid, so your possible fail #1 is unlikely. I'm also using RDP so I cannot check what is going on whe...

MBax.2 · 2022-07-06

@Jocelyn RICARD Yes! that did the trick! I verified it to work with the OTA process as well as the standard YModem update. I can sigh of relief now, knowing that I can ship my products now and push updates over the air.Thank you so much!!I still nee...

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User Activity

STM32L476 does not reset after firmware bootload over UART. How to reset the device over UART?

SBSFU: A low supply voltage event seems to clear the firmware

SBSFU: "Installation not validated" error if version number is increased

How to prevent TLS certificates in KMS of SBSFU to be deleted upon flashing new user firmware?

How to fix undefined references to secure engine functions in a user application that uses SBSFU

Re: STM32L476 does not reset after firmware bootload over UART. How to reset the device over UART?

Re: SBSFU: A low supply voltage event seems to clear the firmware

Re: SBSFU: A low supply voltage event seems to clear the firmware

Re: SBSFU: A low supply voltage event seems to clear the firmware

Re: SBSFU: "Installation not validated" error if version number is increased