DFU Buddy

DFU Buddy is a free, open-source app that makes firmware upgrades on embedded devices super easy. You can use it via USB, and it has a simple interface that’s perfect for everyone!

Cross-Platform Compatibility

This handy tool works on all major operating systems like Windows, macOS, and most Linux distributions. The best part? It's designed to be user-friendly! You won’t find any complicated features here that could accidentally mess up your device.

How DFU Buddy Works

The app follows the DFU standard, which is the USB Device Firmware Upgrade Specification, Revision 1.1. This standard comes from the USB Implementers Forum and supports DfuSe extensions by STMicroelectronics.

Getting Started with DFU Mode

Before you dive in, make sure your device is in DFU mode so it shows up in the app’s menu. Just a heads-up: plain DFU isn’t supported yet, but most DfuSe devices should work just fine without any big issues.

Device Testing

The app has been tested with STM32L433VC, STM32G474VC, and STM32F405RG (pyboard). Out of these, only the first two are working smoothly.

Programming Internal Flashes

You can program internal flashes of STM32 MCUs using this app. However, keep in mind there’s no OTP option available right now.

Linux Users Take Note!

If you're using Linux, you need to set up your udev rules correctly. If you skip this step, you might run into permission issues when trying to access your device.

Selecting Your Device

Once everything's set up, connect your hardware device and power it up in DFU mode. Open the app and choose your device from the dropdown menu. Just remember: it’ll show a generic name like “STM32 Bootloader” instead of the actual brand name.

Selecting Your Firmware File

You can either select the DFU file containing your firmware through the Open menu or just drag and drop it right into the app window!

Updating Your Firmware

The app will do some checks to make sure everything matches up correctly. Click “Confirm” at the bottom left corner to proceed with updating! Hit “Start Update,” and when it's done, close the app and restart your device to see your new firmware in action!

A Simple Yet Useful Tool

While DFU Buddy may not win awards for looks or features, it's super handy for anyone looking to upgrade their DFU device firmware quickly—just a few clicks are all it takes!