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USING THE ST7 USB DEVICE FIRMWARE UPGRADE DEVELOPMENT KIT (DFU-DK)

As shown in Figure 1, we can see that the DFU software is divided into four distinct layers:

– The hardware layer (USB bus interface),

– The kernel layer (Microsoft USB stack and STMicroelectronics tube driver)

and a user application layer that is also divided into two other layers:

– A generic one that manages all DFU requests and is provided as ready binary modules

(ST7DFU and STTubeDevice203 dynamic link libraries).

– A vendor-specific one that is provided as an example reference software (protocol manage-

ment dynamic link library and a demonstration GUI).

This modular architecture was chosen so that the DFU-DK can be used for any application

that needs to implement DFU features. Moreover, this will make it easier to add features any-

time in the future and manage changes.

Note: The DFU-DK is compatible with Windows 98, 98SE, Me, 2000 and XP and is compliant

with the Device Class specification for DFU version1.0 as detailed by the USB-IF.