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Table 6. Demo Project File and Directory Descriptions (continued)

Name Description

Files related to USB functionality, but which are part of the application and not the USB API itself. These files

USB_app handle the keyboard emulation, and implement the virtual storage volume mounted by the device. The directory

also contains the USB "event handlers".

3.4 USB Configuration Files

The USB configuration files, in the \USB_config directory, determine what USB interfaces the USB API

presents to the USB host. These files are generated by the MSP430 USB Descriptor Tool.

The Descriptor Tool customizes the API's USB interfaces and generates all of its USB descriptors (see

Figure 27). (For a discussion on USB descriptors, see Step 2 of Section 1.3.) For example, with just a few

clicks, the Tool can create a composite USB device with three virtual COM ports and an emulated mouse.

Figure 27. MSP430 USB Descriptor Tool

For the simpleUsbBackchannel demo, these files cause the API to present a single CDC interface. An

application can then be written to simply send and receive data over that interface.

For the emulStorageKeyboard example, these files cause the API to have an MSC interface and an HID

interface. They also cause that HID interface to be a keyboard. The application is then responsible for

accessing the storage volume for the MSC interface and for sending HID "reports" that contain key press

data.

*.dat input files for the Descriptor Tool are located inside each example's project directory. This allows

easy regeneration of the output.

SLAU533A–September 2013–Revised January 2014 MSP430F5529 LaunchPad™ Development Tool (MSP

‑

EXP430F5529LP)

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