Can ccmram be divided into data and BSS

[dchen.2000]

I want to divide ccmram into data and bss section,so how to do it?

thank you!

[Tesla DeLorean]

Describe the sections in the linker script or scatter file​, direct content into them, and initialize in startup_stm32xxxx.s

[dchen.2000]

Thank you! I modify link file like this,but it does not work.  so,why?

 .data_CCMRAM : ALIGN(4)

   {

      . = 0x20004000;

      test_ccm = 0x20004000;

      FILL(0xFF)

      *(.data.CCMRAM .data.CCMRAM.*)

      . = ALIGN(4) ;

   } > CCMRAM AT>FLASH

   .bss_CCMRAM (NOLOAD) : ALIGN(4)

   {

       *(.bss.CCMRAM .bss.CCMRAM.*)

   } > CCMRAM

[Tesla DeLorean]

Doesn't work in what respect?

Where does the .MAP file indicate it is placing things?

Don't think I'd set the location there, do it top side in the section definition.

You'd also need to track where in FLASH it is placed so your code in startup.s can unpack it.​

[berendi]

And don't forget to enable the clock in RCC (RCC_AHB1ENR_CCMDATARAMEN or similar) before the reset handler starts copying data into it.