Source code for STM32 bootloader?

[abaldur]

Hi all,

Is the source code of the bootloader (that is used to perform application programming over serial interface) available to download?

The AN2606 says that "The bootloader is stored in the internal boot ROM memory (system memory) of STM32 devices. It is programmed by ST during production."

Best Regards,

abaldur

[ihouses ihouses]

​Hello,

I am trying to use the embedded STM32 bootloader. I have a STM32F723 microcontroller but looks like that the ST Flasher Demo doesn't support it.

Do you guys know any host written in Python that can communicate with the STM32F7 embedded bootloader?

Thanks!

[Tesla DeLorean]

The old app is deprecated, the STM32 Cube Programmer supports UART mode connectivity now.

There were some open source C projects, I wrote my own back in the F1/F2 days, and the protocol isn't that complicated to implement. If you're proficient in Python, perhaps a 4 hour exercise.

[ihouses ihouses]

Hello,

Thanks the hint, it was very userful. I have writen the Python protocol and is not working because in the verification I see that the bootloader actually can not write anything. My guess is because the flash is protected but I don't know where I can change this seeting in System Workbench using Stlink V2.

Any ideas what can cause the the bootloader works fine but in the verification phase the written code and the readed code are different?

BTW. I am not deleteting the flash before since this requires a reset and control the Boot0 pin, something that I can not handle thats why the only way for me is a special command that makes jump the execution code into the bootloader code.​

[NKoot.1]

hi pavel,

so if i upload the usb bootloader, can i still use the ftdi to program stm board using the inbuilt serial bootloader

[Tesla DeLorean]

The ROM based loader comes up when BOOT0 is HIGH at reset, and will always be there. Things like RDP can limit it's ability to function, read out, etc.

See AN2606

[NKoot.1]

thanks clive1