Thank you for your reply,
In order to overcome the DMA issue, I select solution 1 which is considered to be the simple method.
In cased System Workbench for STM32 - STM32 IDE
quote "Replace DTCMRAM with RAM_D1 for section placement in linkerscript (.ld file extension). E.g. like this:
.data :
{
... /* Keep same */
} >RAM_D1 AT> FLASH
this should be done also for .bss and ._user_heap_stack sections."
=>Question 1: there are two .id files one is flash one is Ram. -> I think that we need to change all (it depend on your programming method - store in FLASH OR RAM )
STM32H743ZITX_FLASH.id and STM32H743ZITX_RAM.ld
=>Question 2
"Replace DTCMRAM with RAM_D1 " is not clear. In my case, it is hard to know which one to modify ???
For example , does it mean ? we should replace " DTCMRAM (xrw) : ORIGIN = 0x20000000, LENGTH = 128K" with " RAM_D1 (xrw) : ORIGIN = 0x20000000, LENGTH = 128K" ???
Question 3:
Quote ".data :
{
... /* Keep same */
} >RAM_D1 AT> FLASH
this should be done also for .bss and ._user_heap_stack sections."
when I open " STM32H743ZITX_RAM.ld " I saw some line
.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_D1
.bss :
{
/* This is used by the startup in order to initialize the .bss section */
_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_D1
._user_heap_stack :
{
. = ALIGN(8);
PROVIDE ( end = . );
PROVIDE ( _end = . );
. = . + _Min_Heap_Size;
. = . + _Min_Stack_Size;
. = ALIGN(8);
} >RAM_D1
---------
DO you mean that we should modify like this
.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_D1 AT> FLASH
.bss :
{
/* This is used by the startup in order to initialize the .bss section */
_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_D1 AT> FLASH
._user_heap_stack :
{
. = ALIGN(8);
PROVIDE ( end = . );
PROVIDE ( _end = . );
. = . + _Min_Heap_Size;
. = . + _Min_Stack_Size;
_estack = .; /* <<<< line added */
. = ALIGN(8);
} >RAM_D1
-------------------------
Question 4:
quote : "and remove the original _estack definition."
_estack = ORIGIN(RAM_D1) + LENGTH(RAM_D1); /* end of "RAM_D1" Ram type memory */
/* <<<< line Delete ???*/
do u mean we should delete this line?
Question 5:
finally, we disable Dcache in stm32CUBE, I am right? :D
Please understand that from my view, the solution may not clear, which may cause confusion to the reader?
yours sincerely,
There are many examples for H7 SPI, just download stm32CubeMX.
https://www.st.com/en/embedded-software/stm32cubeh7.html
AP Note:
AN5033
Application note
STM32Cube MCU Package examples for STM32H7 Series
See:
Thank you for your answer :D
I only have one concerned about question 2 ?
In a nutshell, here's what I changed, (see the attached picture)
Please check if I'm doing it right? "Replace DTCMRAM with RAM_D1 for section placement in linkerscript (.ld file extension). "
