How to Create an External Loader (.stldr) for the MX25L1283x NOR Flash with STM32H573VTx?

[mastergbc]

I am using the STM32H573VTx chip and require an External Loader to access a 128Mbits NOR Flash via OctoSPI in memory-mapped I/O mode.

Firstly, regarding the STM32H573I_DK board sold by ST, it utilizes the Macronix MX25LM51245G in OctoSPI mode(8 data line), for which ST provides the external loader MX25LM51245G_STM32H573I-DK.stldr. The file is located at:
STMicroelectronics/STM32Cube/STM32CubeProgrammer/bin/ExternalLoader/MX25LM51245G_STM32H573I-DK.stldr.

In my product, I have designed it with Macronix MX25L1283x configured in Single Quad mode(4 data line) instead of MX25LM51245G. Therefore, I need an .stldr file compatible with the MX25L1283x and STM32H573VTx. Could you advise on how to generate such a loader file?

For reference, when using Zephyr OS, the application located at zephyr/samples/application_development/code_relocation_nocopy successfully enables memory-mapped functionality with the MX25LM51245G. Additionally, I utilize XIP (eXecute-In-Place) to execute images stored in external NOR Flash. The Zephyr KConfig options for this setup include:

CONFIG_XIP=y
CONFIG_STM32_MEMMAP=y

Below is a log of the setup during initialization:

[    0.000000] <dbg> flash_stm32: stm32_flash_init: Flash @0x8000000 initialized. BS: 16
[    0.008000] <dbg> flash_stm32: stm32_flash_init: Block 0: bs: 8192 count: 256
[    0.016000] <dbg> flash_stm32_xspi: flash_stm32_xspi_init: XSPI Init'd
[    0.024000] <dbg> flash_stm32_xspi: flash_stm32_xspi_init: Delay Block Init
[    0.132000] <dbg> flash_stm32_xspi: flash_stm32_xspi_init: Reset Mem (SPI/STR)
[    0.140000] <dbg> flash_stm32_xspi: HAL_XSPI_StatusMatchCallback: Status Match cb
[    0.148000] <dbg> flash_stm32_xspi: flash_stm32_xspi_init: Mem Ready (SPI/STR)
[    0.156000] <dbg> flash_stm32_xspi: stm32_xspi_config_mem: XSPI configuring Octo SPI mode
[    0.165000] <dbg> flash_stm32_xspi: HAL_XSPI_StatusMatchCallback: Status Match cb
[    0.174000] <dbg> flash_stm32_xspi: HAL_XSPI_StatusMatchCallback: Status Match cb
[    0.182000] <dbg> flash_stm32_xspi: HAL_XSPI_StatusMatchCallback: Status Match cb
[    0.231000] <dbg> flash_stm32_xspi: HAL_XSPI_StatusMatchCallback: Status Match cb
[    0.239000] <inf> flash_stm32_xspi: XSPI flash config is OCTO / DTR
[    0.246000] <inf> flash_stm32_xspi: Read SFDP from externalFlash
[    0.253000] <dbg> flash_stm32_xspi: flash_stm32_xspi_init: ospi-nor-flash@90000000: SFDP v 1.8 AP fd with 5 PH
[    0.264000] <dbg> flash_stm32_xspi: flash_stm32_xspi_init: PH0: ff00 rev 1.7: 20 DW @ 40
[    0.273000] <inf> flash_stm32_xspi: Read SFDP from externalFlash
[    0.280000] <dbg> flash_stm32_xspi: spi_nor_process_bfp: ospi-nor-flash@90000000: 64 MiBy flash
[    0.290000] <dbg> flash_stm32_xspi: spi_nor_process_bfp: Erase 4096 with 20
[    0.298000] <dbg> flash_stm32_xspi: spi_nor_process_bfp: Erase 65536 with d8
[    0.306000] <dbg> flash_stm32_xspi: spi_nor_process_bfp: Address width: 4 Bytes
[    0.314000] <dbg> flash_stm32_xspi: spi_nor_process_bfp: Page size 256 bytes
[    0.322000] <dbg> flash_stm32_xspi: spi_nor_process_bfp: Flash size 67108864 bytes
[    0.330000] <dbg> flash_stm32_xspi: spi_nor_process_bfp: Using read mode: 0, instr: 0x0, dummy cycles: 0
[    0.341000] <dbg> flash_stm32_xspi: spi_nor_process_bfp: Using write instr: 0x12ED
[    0.349000] <dbg> flash_stm32_xspi: flash_stm32_xspi_init: PH1: ff87 rev 1.1: 28 DW @ 90
[    0.358000] <dbg> flash_stm32_xspi: setup_pages_layout: layout page 256 not compatible with erase size 4096
[    0.369000] <dbg> flash_stm32_xspi: setup_pages_layout: erase size will be used as layout page size
[    0.379000] <dbg> flash_stm32_xspi: setup_pages_layout: layout 16384 x 4096 By pages
[    0.388000] <dbg> flash_stm32_xspi: stm32_xspi_set_memorymap: MemoryMap mode enabled
[    0.396000] <inf> flash_stm32_xspi: Memory-mapped NOR-flash at 0x90000000 (0x4000000 bytes)
[    0.406000] <dbg> fs: fs_register: fs register 1: 0
*** Booting Zephyr OS build v3.7.0-1157-g7e65299a7e91 ***
Address of main function 0x8000ed9
Address of function_in_ext_flash 0x90000001
Address of var_ext_sram_data 0x200000a0 (10)
Address of function_in_sram 0x20000001
Address of var_sram_data 0x200000a4 (10)
Hello World! stm32h573i_dk

How can I proceed to create an external loader file for MX25L1283x?

[Tesla DeLorean]

The build process for QSPI vs OSPI loaders is very similar, the command set and widths are primarily what change. You could perhaps look at the BSP\Components directory for other STM32 / Cube families.

Can you enumerate the pins used in your design?