This is sample code for external flash loader for STM32CubeProgrammer.

To compile and run it, you need below tools.

• IAR EWARM 8 (I use 32K limited and 8.42.2)
• STM32CubeProgrammer (I use 2.3.0)

To run it, you need below boards.

• Nucleo-F412ZG
• Winbond W25Q128JV board

I bought the W25Q128JV board at here; https://ja.aliexpress.com/item/33035168600.html

• Open W25Q128_STM32F412ZG/EWARM/Project.eww by IAR EWARM (I use 8.42.2)
• Build
• W25Q128_STM32F412ZG.stldr is made in W25Q128_STM32F412ZG folder.
• Copy this stldr to C:\Program Files (x86)\STMicroelectronics\STM32Cube\STM32CubeProgrammer\bin\ExternalLoader
• Start STM32CubeProgrammer
• Select W25Q128_STM32F412ZG in external loader

You can use read, write, erase sector, mass erase, verify commands.