Custom Bootloader STM32H750
Hello,
I am developing a simple GUI for a custom board based STM32H750 MCU.
My requirements are the following:
- Both application code/data and touchGFX images/fonts are stored in and external QSPI (0x90000000)
- The entire application must be executed in the internal SRAM (0x24000000)
For these reasons I modified the ExtMem_Boot example to devolop a bootloader that copy only the application and data in SRAM and jump in APP_ADDRESS 0x24000000:
MEMORY
{
DTCMRAM (xrw) : ORIGIN = 0x20000000, LENGTH = 128K
ITCMRAM (xrw) : ORIGIN = 0x00000000, LENGTH = 64K
RAM (xrw) : ORIGIN = 0x24000000, LENGTH = 256K
RAMFB (xrw) : ORIGIN = 0xD0000000, LENGTH = 768K
OSPI_DATA (xrw) : ORIGIN = 0x90040000, LENGTH = 64M - 256K
}
/* Sections */
SECTIONS
{
/* The startup code into "FLASH" Rom type memory */
.isr_vector :
{
. = ALIGN(4);
KEEP(*(.isr_vector)) /* Startup code */
. = ALIGN(4);
} >RAM /*FLASH*/
/* The program code and other data into "FLASH" Rom type memory */
.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 /*FLASH*/
For small application this works fine. But since I have graphical data generated by touchGFX the compiled binary file (.bin) is huge (1.7GB most of the data are zeros) and I cannot flash the binary in 0x90000000
Is there a way to split application and graphics in two different bin files?