Touchgfx data store in External QSPI Flash

[Chandan Bhatia1]

Hello, I am using STM32F746 discovery board with Touchgfx. As LCD data size is more( Assume 5 MB), I need to put in external QSPI flash. We can store QSPI data in indirect mode and read with memory mapped mode of QSPI. I found that with changes in linker file and with some setting in IDE, we can able to program QSPI with internal flash.

But suppose if i just want to share .hex file of application to other person, In that case how should we flash QSPI data ? I am not able to understand that process.

Any suggestion?

Thanks

[Tesla DeLorean]

You could write your own boot loader that could take a .HEX file and program your internal/external memories.

For the boot loader path, perhaps review the docs / example for IAP (In Application Programming)

For field updates you could perhaps store a .HEX or .DFU on a MicroSD card and the IAP loader could use that to update your device's memories.

If you supply a .HEX file, it should describe the data in the assorted memories, and then your flashing tool/application would need to provide an external loader compatible with your design.

[Chandan Bhatia1]

Thanks, I not using exactly Devkit but a customized board which don't have MicroSD card. I was looking if there is quick solution for this issue from STM thn going with own boot loader solution for initial phase.

[Chandan Bhatia1]

Also I can see external loader option in IDE STM32CUBE programmer. Not sure if this can help.

[Tesla DeLorean]

Sure, it would need an external loader which is compatible with your board (ie chip, clocks, wiring, etc)

[Chandan Bhatia1]

Yes we can put linker script with section as QSPI but suppose we are not usng IDE, so Do we need to make 2 hex file from one project, One with application code and another with QSPI data? Later using external loader to program with 2nd hex file? Sorry I am not able to make logic with this info. Can you suggestion how it should be implemented ?

[Chandan Bhatia1]

Also want to know how to external QSPI flash bin file only from hex file? I need that QSPI session to load using external loader.