Definition of array in flash CoIDE (arm-none-eabi-gcc)

Posted on December 02, 2013 at 16:00

Hi there! I need to define array of fonts in flash.

I'm using STM32F417VG MCU I define it as

const u8 font1[]

But compiler places it in RAM I've found a linker file that Coocox uses to link my project.

OUTPUT_FORMAT (''elf32-littlearm'', ''elf32-bigarm'', ''elf32-littlearm'')
/* Internal Memory Map*/
MEMORY
{
rom (rx) : ORIGIN = 0x08000000, LENGTH = 0x00080000
ram (rwx) : ORIGIN = 0x20000000, LENGTH = 0x00020000
ram1 (rwx) : ORIGIN = 0x10000000, LENGTH = 0x00010000
}
_eram = 0x20000000 + 0x00020000;
/* Section Definitions */ 
SECTIONS 
{ 
.text : 
{ 
KEEP(*(.isr_vector .isr_vector.*)) 
*(.text .text.* .gnu.linkonce.t.*) 
*(.glue_7t) *(.glue_7) 
*(.rodata .rodata* .gnu.linkonce.r.*) 
} > rom
.ARM.extab : 
{
*(.ARM.extab* .gnu.linkonce.armextab.*)
} > rom
__exidx_start = .;
.ARM.exidx :
{
*(.ARM.exidx* .gnu.linkonce.armexidx.*)
} > rom
__exidx_end = .;
. = ALIGN(4); 
_etext = .;
_sidata = .; 
.data : AT (_etext) 
{ 
_sdata = .; 
*(.data .data.*) 
. = ALIGN(4); 
_edata = . ;
} > ram
/* .bss section which is used for uninitialized data */ 
.bss (NOLOAD) : 
{ 
_sbss = . ; 
*(.bss .bss.*) 
*(COMMON) 
. = ALIGN(4); 
_ebss = . ; 
} > ram
/* stack section */
.co_stack (NOLOAD):
{
. = ALIGN(8);
*(.co_stack .co_stack.*)
} > ram
. = ALIGN(4); 
_end = . ; 
} 

What shoul I paste to make compiler place it in FLASH? Directive

__attribute__ ((section(''.text''),used))

causes an ignoring warning I tried to google all day long but found no simple answer how to do it. Thanks #flash-array-coide-coocox