To allow support for boards without a built-in USBPhy, all USB components provide a second constructor, which takes a USBPhy as one of its parameters. The constructors mentioned so far use the default built-in USBPhy as the back end. This is useful when you do not want to connect USB at boot.Īn example of using the connect parameter to connect after boot: #include "mbed.h" When set to false, USB still selects the built-in USBPhy for your hardware, but it does not block or start the connection sequence. The first optional parameter to the constructor of all USB components is a bool that specifies whether the USB component should connect and block until ready. Default constructor to connect and block until ready Selects the built-in USBPhy for your hardware.Īn example of USBKeyboard's default constructor: #include "mbed.h".Once the constructor is finished then the device is ready to be used. Component constructionĬonstructing a USB component with the default parameters perform initialization for you.
Usb secure 1.5.5 serial key how to#
Below is information common to all of the Mbed OS USB components and how to use them. These USB components inherit from USBDevice and provide specific USB peripherial functionality. This document refers to the Mbed OS classes providing USB peripheral functionality as USB components. For example, keyboards, mice, USB audio devices, printers, scanners, disk drives and cameras can use the same bus to exchange data with a computer.
USB has been designed to standardize connections between the computer and peripherals.
The Universal Serial Bus (USB) is the most widely used bus in today's computer.
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