Problems in developing a custom external loader.

[YJMoon]

H​ello.

I am trying to make a touchgfx demo using stm32f767 apollo board.

However, I was stuck while applying a custom external loader using w25q256.

I've modified the code from my existing 746-disco demo and it doesn't work at all.

Dose anyone have examples or references that use the sw4stm32 compiler and w25q256?

Please help me.

Thanks.

[Martin KJELDSEN]

This is not really related to TouchGFX, so i'm adding a few more tags to it.

/Martin

[YJMoon]

​Thank you so much!

[Tesla DeLorean]

I use Keil, and have worked with W25Q256 parts and External Loaders for Cube Programmer and ST-LINK Utilities.

A worked example will run several hundred dollars.​

[YJMoon]

​omg... I can't use keil because it is an expensive compiler.

In the end, I'll have to study myself and code related things.

Thank you.

[Tesla DeLorean]

These things can be built with the Lite/Eval version of Keil.

The specificity of your question tends to limit the chances of getting an answer that checks all your boxes.

When developing External Loaders it helps significantly to have a fully tested and debugged library running in an application on your QSPI hardware. Once you have the test app working you can port code into a loader. The loaders are hard to debug from within the ST-LINK Utility, or Cube Programmer

[YJMoon]

Solved.

I changed it to w25q256-> mt25ql512.

It works perfectly.