how to use FMC NOR flash to store touchgfx assets such as images, fonts, text etc while the frame buffer is located in FMC SDRAM ?

[sanjeev majumdar]

Hello Martin,

There is no example available for FMC NOR flash used to store touchgfx assets in cube firmware examples/projects. Only i could find examples where QSPI flash is used for touchgfx.

I have done necessary initialization for FMC NOR flash and also described the Flash memory region in the linker script as follows, but it dint work. I am using stm32f769i eval board for the same. FMC nor flash is memory mapped. Also i have taken care the caching part using mpu config for nor flash and in sdram. kindly let me know where could be the issue.

 LR_ROM1 0x60000000 0x01000000 {  ; load region size_region

 extflash.bin 0x60000000 0x01000000 { ; load address = execution address

  *.o (ExtFlashSection)

 }

 }

[Martin KJELDSEN]

What actually is your problem? Can you read from your NOR flash? What "didn't work" ?

/Martin

[sanjeev majumdar]

NOR flash works fine, i can independently read and write but when i am using it for touchgfx, the stored images are not getting displayed / retrieved. Also the frame buffer is resident on FMC sdram.

[Martin KJELDSEN]

And your application is running fine, otherwise?

[sanjeev majumdar]

yes it does only not able to retrieve images from FMC NOR flash

[sanjeev majumdar]

so is it possible for you to experiment with FMC NOR flash to store touchgfx assets and share an example or can u plz let me knw what i can try as FMC NOR flash is memory mapped