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I'd love to see this extra step in Windows removed, but for now, I hope this write up makes it clearer and helps the lone Googler who finds this post. NOTE: When using dfu-util on Windows, I recommend you either be smart about your PATH and add dfu-util, or better yet, make sure the dfu-util.exe and libusb.dlls are local to your firmware so there's no confusion about what libraries are being used. I replace the bootloader with the generic WinUSB driver and run dfu-util again and it finds the devices.Īt this point I can follow along and flash my devices per whatever instructions my manufacturer/project/boardmaker intends. I run dfu-util -list and it finds nothing. Note the before and after in the screenshot below. Here the STM32 Bootloader device now exists in Universal Serial Bus Devices in Device Manager. Note the SUCCESS and the changed Driver on the left. Now I run Zadig and replace the driver with WinUSB. In this state, you can see in the Device Manager that there's an "STM Device in DFU Mode." Be aware that you can mess up your system if you select something like your WebCam instead of the hardware device you mean to select. In my case the device was listened under STM32 Bootloader.
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Here you can see me finding the ST device within Zadig and replacing the driver with WinUSB. Run Zadig and click Options | List All Devices. Install a generic USB driver for your device - WinUSB using Zadig The issue is that the default "inbox" driver that Windows uses for devices like this isn't set up for Generic USB access with libraries like "libusb." If you follow the instructions when flashing a device and don't have the right USB driver installed you'll likely get an error like this: Cannot open DFU device 0483:df11 you want to access a device using WinUSB.
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