SLAA457B September   2013  – October 2018 MSP430F5500 , MSP430F5501 , MSP430F5502 , MSP430F5503 , MSP430F5504 , MSP430F5505 , MSP430F5506 , MSP430F5507 , MSP430F5508 , MSP430F5509 , MSP430F5510 , MSP430F5513 , MSP430F5514 , MSP430F5515 , MSP430F5517 , MSP430F5519 , MSP430F5521 , MSP430F5522 , MSP430F5524 , MSP430F5525 , MSP430F5526 , MSP430F5527 , MSP430F5528 , MSP430F5529 , MSP430F5630 , MSP430F5631 , MSP430F5632 , MSP430F5633 , MSP430F5634 , MSP430F5635 , MSP430F5636 , MSP430F5637 , MSP430F5638 , MSP430F5658 , MSP430F5659 , MSP430F6630 , MSP430F6631 , MSP430F6632 , MSP430F6633 , MSP430F6634 , MSP430F6635 , MSP430F6636 , MSP430F6637 , MSP430F6638 , MSP430F6658 , MSP430F6659 , MSP430FG6425 , MSP430FG6426 , MSP430FG6625 , MSP430FG6626

 

  1.   Starting a USB Design Using MSP430™ MCUs
    1.     Trademarks
    2. 1 USB and the Art of Making Something Complex Look Simple
      1. 1.1 What Has Made USB So Successful?
      2. 1.2 But It Looks So Simple!
      3. 1.3 TI's Approach for MSP430 USB
    3. 2 MSP430 USB Silicon
      1. 2.1 How MSP430 Devices are Documented
      2. 2.2 USB-Equipped MSP430 Derivatives
      3. 2.3 MSP430 USB Module
      4. 2.4 USB Certification of the Silicon
    4. 3 Software
      1. 3.1 USB Developers Package: Overview
      2. 3.2 USB API Stacks: Features
      3. 3.3 MSP430 USB Descriptor Tool
      4. 3.4 Host Software, and the Java HID Demo App
      5. 3.5 USB API Programmer's Guide and Examples Guide
      6. 3.6 MSP430 USB Field Firmware Upgrade Tools
    5. 4 MSP430 USB Hardware Design
      1. 4.1 TI Reference Design for USB Interface
      2. 4.2 Selecting a Power Configuration
      3. 4.3 Selecting a Clock Configuration
        1. 4.3.1 Choosing a Source
        2. 4.3.2 Choosing a Frequency
      4. 4.4 Other Reference Design Commentary
    6. 5 MSP430 USB Software Design
      1. 5.1 How to Choose a USB Device Class
      2. 5.2 How to Select a Vendor ID (VID) and Product ID (PID)
        1. 5.2.1 What are the VID and PID?
        2. 5.2.2 How are They Chosen (or Obtained)?
        3. 5.2.3 Using VIDs and PIDs During Development
    7. 6 Getting Started: Evaluating MSP430 USB
      1. 6.1 Software Development Environments
      2. 6.2 F5529 LaunchPad Development Kit
      3. 6.3 MSP430F5529 USB Experimenter's Board
      4. 6.4 FET Target Boards
    8. 7 More Information
  2.   A USB Glossary
  3.   Revision History

3.4 Host Software, and the Java HID Demo App

The kernel-level host drivers for CDC, HID, and MSC are already present within the common host operating systems (Windows™, Mac OS X™, and Linux®). But the developer must identify or create an application on the host that interfaces with the USB device.

usb_host_software_slaa457.gifFigure 5. USB Host Software

Writing host software for CDC and MSC interfaces is very straightforward, because they present interfaces to the host that are very commonly understood: virtual COM ports and storage volumes. These interfaces are not specific to USB, and resources on writing code for them are very easy to find.

HID interfaces are different, because they are more specific to USB. Some HID interfaces are actually PC peripherals that the host operating system itself interacts with it directly, like a mouse or keyboard. These do not need additional host software.

But sometimes HID interfaces are beneficial for general communication (like the MSP430 HID-Datapipe interface). Writing custom applications to talk with an HID interface can be slightly more complicated than interfacing with a COM port or storage volume. For this reason, TI provides the Java HID Demo App (see Figure 6). This application is provided as both a source code example and an executable that serves as a utility. Because it is written in Java, it is meant to be extendable across multiple host platforms.

java_hid_demo_app_slaa457.pngFigure 6. Java HID Demo App