Hello all !
Can someone provide me some information on how to use the SDRAM as heap for use with mbed rtx.
Changing the heap location in linker-script seems not valid. I get the following link error message:
c:/sysgcc/arm-eabi/bin/../lib/gcc/arm-eabi/6.2.0/../../../../arm-eabi/bin/ld.exe: Region RAM overflowed with stack and heap
Target: STM32F429I-DISC1
IDE: VisualStudio w/ VisualGDB
example project: LEDBlink w/ mbed from VisualGDB Wizzard
I setup a new memory section:
SDRAM (rwx) : ORIGIN = 0xD0000000, LENGTH = 8M
and simply moved the heap section to SDRAM:
.heap (NOLOAD):
{
__uvisor_heap_start = .;
__end__ = .;
end = __end__;
. += HEAP_SIZE;
__HeapLimit = .;
__uvisor_heap_end = .;
} > SDRAM
I set the preprocessor defines DATA_IN_ExtSDRAM and STM32F429xx
Seems that rtx is fixed to a certain memory-structure?
Another thing I stumbled upon is the initialization of the SDRAM. In the provided system_stm32f4xx.x they initialize GPIO H and I for use wth SDRAM. They do not exist on the STM32F429I-DISC1.
Maybe someone can give me a hint?
Thanks in advance.
Dirk
Hello all !
Can someone provide me some information on how to use the SDRAM as heap for use with mbed rtx. Changing the heap location in linker-script seems not valid. I get the following link error message: c:/sysgcc/arm-eabi/bin/../lib/gcc/arm-eabi/6.2.0/../../../../arm-eabi/bin/ld.exe: Region RAM overflowed with stack and heap
Target: STM32F429I-DISC1 IDE: VisualStudio w/ VisualGDB example project: LEDBlink w/ mbed from VisualGDB Wizzard
I setup a new memory section: SDRAM (rwx) : ORIGIN = 0xD0000000, LENGTH = 8M
and simply moved the heap section to SDRAM:
I set the preprocessor defines DATA_IN_ExtSDRAM and STM32F429xx
Seems that rtx is fixed to a certain memory-structure?
Another thing I stumbled upon is the initialization of the SDRAM. In the provided system_stm32f4xx.x they initialize GPIO H and I for use wth SDRAM. They do not exist on the STM32F429I-DISC1.
Maybe someone can give me a hint?
Thanks in advance. Dirk