how to run code from RAM without erase Flash?

[JChen]

Hi all,

I have a custom board, MCU is STM32F103ZE, I want to debug from RAM but I don't konw how to set the truestudio.

I konw how to do it in the KEIL, but for truestudio, I am a stranger.

for example,

I download the program A to mcu flash, it work well. Now I am debugging program B, I just want to debug B from RAM, when the board reset, it can run A. what's more, becasue not to erase the flash, it can save debug time.

I konw there is an option in the "Target setting->code location", I choose RAM, and I need to change the "Tool Setting ->Linker script",but debug failed.

flow is the Debug_STM32F103ZE_RAM.ld file

/* Entry Point */

ENTRY(Reset_Handler)

/* Highest address of the user mode stack */

_estack = 0x20010000; /* end of 64K RAM */

/* Generate a link error if heap and stack don't fit into RAM */

_Min_Heap_Size = 0; /* required amount of heap */

_Min_Stack_Size = 0x200; /* required amount of stack */

/* Specify the memory areas */

MEMORY

{

FLASH (rx) : ORIGIN = 0x08000000, LENGTH = 512K

RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 64K

MEMORY_B1 (rx) : ORIGIN = 0x60000000, LENGTH = 0K

}

/* Define output sections */

SECTIONS

{

/* The startup code goes first into RAM */

.isr_vector :

{

. = ALIGN(4);

KEEP(*(.isr_vector)) /* Startup code */

. = ALIGN(4);

} >RAM

/* The program code and other data goes into RAM */

.text :

{

. = ALIGN(4);

*(.text) /* .text sections (code) */

*(.text*) /* .text* sections (code) */

*(.glue_7) /* glue arm to thumb code */

*(.glue_7t) /* glue thumb to arm code */

*(.eh_frame)

KEEP (*(.init))

KEEP (*(.fini))

. = ALIGN(4);

_etext = .; /* define a global symbols at end of code */

} >RAM

/* Constant data goes into RAM */

.rodata :

{

. = ALIGN(4);

*(.rodata) /* .rodata sections (constants, strings, etc.) */

*(.rodata*) /* .rodata* sections (constants, strings, etc.) */

. = ALIGN(4);

} >RAM

.ARM.extab : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >RAM

.ARM : {

__exidx_start = .;

*(.ARM.exidx*)

__exidx_end = .;

} >RAM

.preinit_array :

{

PROVIDE_HIDDEN (__preinit_array_start = .);

KEEP (*(.preinit_array*))

PROVIDE_HIDDEN (__preinit_array_end = .);

} >RAM

.init_array :

{

PROVIDE_HIDDEN (__init_array_start = .);

KEEP (*(SORT(.init_array.*)))

KEEP (*(.init_array*))

PROVIDE_HIDDEN (__init_array_end = .);

} >RAM

.fini_array :

{

PROVIDE_HIDDEN (__fini_array_start = .);

KEEP (*(SORT(.fini_array.*)))

KEEP (*(.fini_array*))

PROVIDE_HIDDEN (__fini_array_end = .);

} >RAM

/* used by the startup to initialize data */

_sidata = LOADADDR(.data);

/* Initialized data sections goes into RAM, load LMA copy after code */

.data :

{

. = ALIGN(4);

_sdata = .; /* create a global symbol at data start */

*(.data) /* .data sections */

*(.data*) /* .data* sections */

. = ALIGN(4);

_edata = .; /* define a global symbol at data end */

} >RAM

/* Uninitialized data section */

. = ALIGN(4);

.bss :

{

/* This is used by the startup in order to initialize the .bss secion */

_sbss = .; /* define a global symbol at bss start */

__bss_start__ = _sbss;

*(.bss)

*(.bss*)

*(COMMON)

. = ALIGN(4);

_ebss = .; /* define a global symbol at bss end */

__bss_end__ = _ebss;

} >RAM

/* User_heap_stack section, used to check that there is enough RAM left */

._user_heap_stack :

{

. = ALIGN(4);

PROVIDE ( end = . );

PROVIDE ( _end = . );

. = . + _Min_Heap_Size;

. = . + _Min_Stack_Size;

. = ALIGN(4);

} >RAM

/* MEMORY_bank1 section, code must be located here explicitly */

/* Example: extern int foo(void) __attribute__ ((section (".mb1text"))); */

.memory_b1_text :

{

*(.mb1text) /* .mb1text sections (code) */

*(.mb1text*) /* .mb1text* sections (code) */

*(.mb1rodata) /* read-only data (constants) */

*(.mb1rodata*)

} >MEMORY_B1

/* Remove information from the standard libraries */

/DISCARD/ :

{

libc.a ( * )

libm.a ( * )

libgcc.a ( * )

}

.ARM.attributes 0 : { *(.ARM.attributes) }

}

.ARM.attributes 0 : { *(.ARM.attributes) }

}