Cypress CyUsb3.sys Programmers Reference

Matching Devices to the Driver17

5.In the Computer Management window, select Device Manager

6.In the right window pane, click the + icon next to Universal Serial Bus controllers

7.Locate your device in the list and double click on it

8.Select the Driver tab in the Properties dialog that comes up

9.Click on the Driver Details button.

10.If the displayed driver file is CYUSB3.SYS, Windows has already matched the device to this

driver and you should click OK and Cancel . If not, proceed with the remaining steps.

11.Click OK

12.Click Update Driver

13.Select Browse my computer for driver software

14.Click Next

15.Select Let me pick from a list of device drivers on my computer

16.Click Next

17.Select Select your device's type from list below and Select show all device

18.Click Next

19.Click Have Disk

20.Click Browse

21.Navigate to the directory containing CYUSB3.SYS (Directory Name for various Operating

System and platform: wlh(windows Vista) and win7(windows 7 and Windows 8 Beta) andselect x86(32-bit OS) or x64(64-bit OS)) based on the platform you want to install driver on.

22.CYUSB3.INF should be automatically placed in the File name field

23.Click Open

24.Click OK

25.Click Next

26.It will popup message saying Unsigned driver, Please select 'Install driver software anyway' and

click ok.

27.Click Finish

28.Click Close

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18Cypress CyUsb3.sys Programmer's Reference29.Don't re-boot your system if Windows suggests that you must. You may need to unplug and

re-plug your device, however.

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Reinstalling the Driver194Reinstalling the Driver

While reinstalling the driver with another .inf file which contains the same VID- PID combination, it's safeto remove all oemXX.inf and oemXX.pnf files from the directory \NDOWS\\inf\\\e sameVID-PID combination.

Note:

Installing the driver using .inf file, Windows creates corresponding oemXX.inf and oemXX.pnf backupfiles in the directory \NDOWS\\inf\\\the new .inf file that customer really wants to install.

? 2012 Cypress Semiconductor

20Cypress CyUsb3.sys Programmer's Reference5The IOCTL Interface

Applications software communicates with the CYUSB3.SYS driver primarily through the DeviceIoControl( ) function. (See the Windows SDK documentation for details about DeviceIoControl.)

Calls to DeviceIoControl require an IO Control (aka IOCTL) code parameter. The IOCTL codes define theprogramming interface that a driver supports and are particular to any given driver. The control codespecified in a DeviceIoControl( ) call determines the values that must be specified for the otherDeviceIoControl parameters.

This help file provides the IOCTL 'dictionary' for the CYUSB3.SYS driver.

Example

DWORD dwBytes = 0;

UCHAR EndptAddress = 0x82;

DeviceIoControl(hDevice, IOCTL_ADAPT_RESET_PIPE,

&EndptAddress, sizeof (EndptAddress), NULL, 0,

&dwBytes, NULL);

? 2012 Cypress Semiconductor