We use dual boot on a stm32F7 MCU and set the nDBOOT option via STM32CubeProgrammer. Now I downloaded the latest version of the tool, but the nDBOOT option does not show anymore, thus I cannot enable dual boot.

[Imen.D]

Hello @ASiem.3​ and welcome to the Community :)

Make sure that you have the same condition as in AN2606 "Table 88. STM32F76xxx/77xxx bootloader V9.x versions" , which lists the Known limitations: 

For STM32F7 Series having the Dual Bank Boot feature, you have to disable nDBOOT and/or nDBANK features (in option bytes), then jump to bootloader.

So, when the Flash memory is configured to the dual bank boot mode (nDBANK=nDBOOT=0), whatever the BOOT0 Pin state only BOOT_ADD0 value is considered (when BOOT0 Pin=1, BOOT_ADD0 value is considered not the BOOT_ADD1).

Workaround: in order to manage dual bank boot with BOOT_ADD0 only, please refer to the

AN4826: "STM32F7 Series Flash memory dual bank mode�?.

Please, keep us informed about your update.

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This will help other members of the community find this response faster. :)

Imen

[ASiem.3]

Yes, dual boot works just fine.

The problem is that I cannot disable nDBOOT with the latest Stm32CubeProgrammer because the option does not show up under option bytes. It works just fine with the old version of STM32CubeProgrammer that I used before.

[Imen.D]

Can you please share your screenshot to compare with mine ?

[Piranha]

The nDBANK and nDBOOT are two separate flags and your image is missing the nDBOOT.

[ASiem.3 · Accepted solution]

Your screenshot does not show nDBOOT either.

[Houda GHABRI]

Hello @ASiem.3​ ,

You are right ! ndBoot OB is missing in user configuration TAB,

I raise this issue internally to be fixed in CubeProgrammer future release.

Internal ticket number: 126991(PS: This is an internal tracking number and is not accessible or usable by customers). 

Thanks to highlight this issue.

Houda

[marcde]

Hello ,

I'm using STM32_Programmer_CLI to program the STM32F76x and have issue to program the nDBoot option byte.

It shows up in STM32CubeProgrammer , but STM32_Programmer_CLI does not .

I think it is probably related to this  problem . Do you know solution for this ?

I'm using STMCubeProgrammer v2.14.0

[Aziz BRIGUI]

Hello @marcde,

Welcome to ST Community !

Correction hasn't been done yet for 1 MB flash size targets, the issue will be fixed in the next release of STM32CubeProgrammer.

Internal ticket number: 158507 (PS: This is an internal tracking number and is not accessible or usable by customers).

Thanks,

Aziz