IAR_STM32_CCM内存使用

在IAR中，硬件环境为STM32F464单片机，额外的CCM不能用DMA访问，但可以作为内部额外扩充RAM使用

修改文件中的内容为：

define symbol __ICFEDIT_region_ROM_start__    = 0x08000000;

define symbol __ICFEDIT_region_ROM_end__      = 0x080FFFFF;

define symbol __ICFEDIT_region_RAM_start__    = 0x20000000;

define symbol __ICFEDIT_region_RAM_end__      = 0x2001FFFF;

define symbol __ICFEDIT_region_CCMRAM_start__ = 0x10000000;

define symbol __ICFEDIT_region_CCMRAM_end__   = 0x1000FFFF;

/*-Sizes-*/

define symbol __ICFEDIT_size_cstack__ = 0x400;

define symbol __ICFEDIT_size_heap__ = 0x800;

/**** 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 = , size = __ICFEDIT_size_cstack__   { };

define block HEAP      with alignment = , size = __ICFEDIT_size_heap__     { };

initialize by copy {readwrite};

do not initialize  { section .noinit };

place at address mem:__ICFEDIT_intvec_start__ { readonly section .intvec };

place in ROM_region   { readonly };

place in CCMRAM_region { readwrite };    //内存分配CCM优先（除堆栈）

place in RAM_region   { block CSTACK, block HEAP };  //堆区和栈区设置在SRAM

要具设置某个文件生成在CCM区，place in CCMRAM_region { readwrite };修改为：

place in CCMRAM_region {readwrite object tasks.o,

readwrite object heap_4.o };

或者具体到内存中分配的类型（具体查看生成的map文件）修改为：

place in CCMRAM_region {section .bss object tasks.o,

section .bss object heap_4.o };

内存灵活配置，当然也可配置为（注意CCM区不能使用DMA）：

place in CCMRAM_region { block CSTACK, block HEAP }; //堆区和栈区设置在CCM

place in RAM_region { readwrite }; ///内存分配CCM优先（除堆栈）

/*###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__      = 0x080FFFFF;

define symbol __ICFEDIT_region_RAM_start__    = 0x20000000;

define symbol __ICFEDIT_region_RAM_end__      = 0x2001FFFF;

define symbol __ICFEDIT_region_CCMRAM_start__ = 0x10000000;

define symbol __ICFEDIT_region_CCMRAM_end__   = 0x1000FFFF;

/*-Sizes-*/

define symbol __ICFEDIT_size_cstack__ = 0x800;

define symbol __ICFEDIT_size_heap__   = 0x18C00;

/**** 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 = , size = __ICFEDIT_size_cstack__   { };

define block HEAP      with alignment = , size = __ICFEDIT_size_heap__     { };

initialize by copy { readwrite };

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 CSTACK, block HEAP };

place in CCMRAM_region{ readwrite  object heap_4.o,

                        readwrite  object tasks.o,

                        readwrite  object port.o,

                        readwrite  object cmsis_os.o,

                       };

巴特西

IAR_STM32_CCM内存使用

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