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Chapter 12
app_vendor_echo.c contains some constants to customize the demo.
12
Constant
APP_CFG_RX_ASYNC_EN
APP_MAX_NBR_VENDOR_DEV
Description
Enables or disables the use of the asynchronous API for IN pipe. The possible
values are TRUE or FALSE .
Defines the maximum number of connected vendor devices supported by the
demo.
Table 12-7 Windows Application Constants Configuration
The constants configuration for the Windows application are independent from the device
application constants configuration presented in Table 12-6.
12-4-2 EDITING AN INF FILE
An INF file contains directives telling to Windows how to install one or several drivers for
one or more devices. Refer to section 3-1-1 “About INF Files” on page 46 for more details
about INF file use and format. The Vendor class includes two INF files located in
\Micrium\Software\uC-USB-Device-V4\App\Host\OS\Windows\Vendor\INF :
■
WinUSB_single.inf , used if the device presents only one Vendor class interface.
■
WinUSB_composite.inf , used if the device presents at least one Vendor class interface
along with another interface.
The two INF files allows you to load the WinUSB.sys driver provided by Windows.
WinUSB_single.inf defines this default hardware ID string:
USB\VID_FFFE&PID_1003
While WinUSB_composite.inf defines this one:
USB\VID_FFFE&PID_1001&MI_00
The hardware ID string contains the Vendor ID (VID) and Product ID (PID). In the default
strings, the VID is FFFE and the PID is either 1003 or 1001. The VID/PID values should
match the ones from the USB device configuration structure defined in usb_dev_cfg.c .
Refer to section “Modify Device Configuration” on page 34 for more details about the USB
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