How to flash STM32 MCU using USB

[FrankNatoli]

Using IAR to develop software for and burn flash via USB on STM32 7B3I and Discovery eval boards.

Need to develop my own Windows software to burn flash via USB on our own product.

Am familiar with AN2606 [bootloader] and AN3156 [DFU] but neither appear to document how to use host USB to burn client flash.

Can anyone point to a relevant document?

[MM..1]

If you set properly board to DFU mode then

STM32_Programmer_CLI.exe -c port=USB1 -d c:\***\Debug\prjprj.elf

[FrankNatoli]

Thank you, but, I'm looking for either DFU implementation documentation or open source.

I think I've found that with dfu-util-master over at sourceforge.net.

Although that has both source and Visual Studio solution files, it unfortunately references but does not include libusb project sources and getopt project sources, which I am trying to find and merge into the dfu-util-master solution.

[FrankNatoli]

Please forgive my relative ignorance on this matter, but are STM32 development boards, e.g., Discovery or 7B3I, not by default in "DFU" mode?

I have gone through the considerable effort of downloading dfu-util-master from SourceForge.net, plus libusb, plus getopt, getting all three projects to successfully compile and link under Microsoft Visual Studio 2022, and the resultant EXE cannot find any DFU capable devices, although IAR has no problem recognizing, programming and debugging the Discovery and 7B3I via USB.