bootio is a host-side C library for interacting with USB DFU / DfuSe devices using libusb. It is designed for programmatic and embedded tooling use (SDKs, custom flashers, CI pipelines), not as an end-user CLI utility.

The library provides a deterministic, explicit API for:

• DFU control transfers (DNLOAD, UPLOAD, GETSTATUS, CLRSTATUS, DETACH)
• DfuSe-specific commands (SET_ADDRESS, ERASE_PAGE, MASS_ERASE, LEAVE)
• Parsing DfuSe memory maps
• Handling DFU suffix and CRC32

Feature map see is the FeatureMap.md file.

Licensed under the MIT License.

See the LICENSE file for details.

• CMake (3.23 minimum)
• vcpkg (2025.09.17 minimum)
• C17/23 (MSVC, LLVM Clang)

mkdir build && cd build
cmake ..
cmake --build .

Ref docs:

• DFU protocol 1.1, Aug 5, 2004
• AN3156 (STM32 USB DFU Boot Protocol)
• Open source DfuSe Demo repo