How to use CCM RAM on STM32F303VC?

[Asantos]

Posted on October 31, 2012 at 12:58

There's no examplo using CCM RAM on the STM32F303 stantard library. I need to know how modify the EWARM liker icf file to add the CCM RAM section and how to put an assembler routine in this section.

[Tesla DeLorean]

Posted on October 31, 2012 at 15:15

Not an IAR expert, but would something like this work:

// .C char FOO_CCM[128] @ 0x10000000; Or // .ICF /*###ICF### Section handled by ICF editor, don't touch! ****/ /*-Editor annotation file-*/ /* IcfEditorFile=''$TOOLKIT_DIR$\config\ide\IcfEditor\cortex_v1_0.xml'' */ /*-Specials-*/ define symbol __ICFEDIT_intvec_start__ = 0x08000000; /*-Memory Regions-*/ define symbol __ICFEDIT_region_ROM_start__    = 0x08000000; define symbol __ICFEDIT_region_ROM_end__      = 0x0803FFFF; define symbol __ICFEDIT_region_RAM_start__    = 0x20000000; define symbol __ICFEDIT_region_RAM_end__      = 0x20009FFF; define symbol __ICFEDIT_region_CCMRAM_start__ = 0x10000000; define symbol __ICFEDIT_region_CCMRAM_end__   = 0x10001FFF; /*-Sizes-*/ define symbol __ICFEDIT_size_cstack__ = 0x400; define symbol __ICFEDIT_size_heap__   = 0x200; /**** End of ICF editor section. ###ICF###*/ define memory mem with size = 4G; define region ROM_region      = mem:[from __ICFEDIT_region_ROM_start__   to __ICFEDIT_region_ROM_end__]; define region RAM_region      = mem:[from __ICFEDIT_region_RAM_start__   to __ICFEDIT_region_RAM_end__]; define region CCMRAM_region   = mem:[from __ICFEDIT_region_CCMRAM_start__   to __ICFEDIT_region_CCMRAM_end__]; define block CSTACK    with alignment = 8, size = __ICFEDIT_size_cstack__   { }; define block HEAP      with alignment = 8, size = __ICFEDIT_size_heap__     { }; initialize by copy { readwrite }; initialize by copy { section .ccm }; do not initialize  { section .noinit }; place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec }; place in ROM_region   { readonly }; place in RAM_region   { readwrite, block HEAP }; place in CCMRAM_region  { section .ccm, block CSTACK }; // .S   SECTION .ccm:CODE:NOROOT(2)   DCD 0xDEADBEEF // .C char FOO_CCM[128] @ ''.ccm'';