TouchGFX bootloader, dfu posibilities

[RPipi.1]

Hi,

I have been building on a demo STM32F746g-DISCO touchgfx application for a little while now.

My next thing I want to acheive is software update. I realised that the application do not fit in the internal flash.

So I am thinking about my options. Either:

1. Run the Application on the QSPI, this should be possible right?
2. Split up the hex generation for one internal and one external binary, have a custom loader.

The approach I have tried going with is 1). But I am having issues jumping to the application but with no success re-enabling interrupts etc, normaly Hal_Delay() stop working, or some other strange issues, from turning on CPU cache or initiating SystemClock Config twice.

Another question is why are there 2 ld files in the touchgfx project, one ram and one flash.

Which way would you guys have gone solving this?

BR

Robin

[Martin KJELDSEN]

What won't fit in internal flash? application + assets? Just application? You can place assets in qspi, leaving code in internal.

the .ld files are generated by CubeMX. You want to use the _FLASH version. The RAM version is for putting startup code etc into ram.

e.g.

/* Sections */
SECTIONS
{
  /* The startup code into "RAM" Ram type memory */
  .isr_vector :
  {
    . = ALIGN(4);
    KEEP(*(.isr_vector)) /* Startup code */
    . = ALIGN(4);
  } >RAM

/Martin