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Chapter 12
12-1 OVERVIEW
Figure 12-1 shows the general architecture between the host and the device using the
Vendor class. In this example, the host operating system is Windows.
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Figure 12-1 General Architecture Between Windows Host and Vendor Class
On the Windows side, the application communicates with the vendor device by interacting
with the USBDev_API library. This library provided by Micriμm offers an API to manage a
device and its associated pipes, and to communicate with the device through control, bulk
and interrupt endpoints. USBDev_API is a wrapper that allows the use of the WinUSB
functions exposed by Winusb.dll.
On the device side, the Vendor class is composed of the following endpoints:
■
A pair of control IN and OUT endpoints called the default endpoint.
■
A pair of bulk IN and OUT endpoints.
■
A pair of interrupt IN and OUT endpoints. This pair is optional.
206
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