DLL Functions
The following functions are exported and are linkable to a
Visual C++ or any other environment, such as Visual Basic, that can use
(or import) functions from a DLL.
Basic functions:
GetDriverVersion - Obtains the WDM driver version
information
GetDevCount - Obtains number of devices attached.
GetDevicePath - Unlike other USB driver tools ours allows
you to access your device based on the physical port that it is connected to
instead of using a simple device number. This is very important when
your app. manages multiple devices. This is accomplished using the PnP
device name path.
OpenDevice - Obtains a handle to the USB device for future
functions calls.
OpenDevicePath - Opens a device using the PnP device path.
CloseDevice - Closes a handle obtained by a previous call
to OpenDevice.
Port functions:
ResetParentPort - Resets the parent port of the device
GetParentPortStatus - Obtains the status of the parent
port and the device.
Pipe functions:
GetPipeCount - Obtains the pipe count on the specified
device.
GetPipeInfo - Obtains the pipe information for the
specified pipe. The pipe information indicates direction, type (bulk,
interrupt, ISO), transfer size, etc.
AbortPipe - Aborts any pending I/O operations on the
specified pipe
ResetPipe - Resets a specified pipe.
Descriptor functions:
GetDeviceDescriptor - Obtains the device descriptor.
GetConfigDescriptor - Obtains the configuration descriptor.
GetInterfaceDescriptor - Obtains the interface descriptor.
GetEndpointDescriptor - Obtains the endpoint descriptor for the specified endpoint.
GetStringDescriptorLength - Returns the length of the specified string descriptor.
GetStringDescriptor - Obtains the specified string descriptor.
Read/Write functions:
InterruptRead
InterruptWrite
BulkRead
BulkWrite
Miscellaneous functions:
SelectInterface - Selects the specified interface and alternate setting.
GetLanguageIDs
GetNumberOfLanguageIDs
Vendor/Class Endpoint 0 functions:
VendorOrClassRequestOut
VendorOrClassRequestIn
Cypress EZ-USB/FX/FX2(tm) specific functions:
Run/Hold - Starts and Stops the 8051 processor.
EZUSBDownloadRam - Downloads to Cypress RAM.
EZUSBDownloadI2C - Downloads to Cypress I2C. The example
code shows how to add the needed functionality to your firmware.
Pipe I/O Functions:
PipeOpen - Opens Pipe on specified device returning handle for pipe operations.
PipeOpenPath - Opens a Pipe on a device specified by the PnP device path.
PipeClose - Given handle from prior USB_PipeOpen(), closes the pipe.
PipeWrite - WriteFile() wrapper function which supports overlapped I/O. Bulk or Interrupt is supported.
PipeRead - ReadFile() wrapper function which supports overlapped I/O. Bulk or Interrupt is supported.
PipeWriteTimeout - WriteFile() wrapper function with timeout. Bulk or Interrupt is supported.
PipeReadTimeout - ReadFile() wrapper function with timeout. Bulk or Interrupt is supported.
PipeAbort - Aborts any pending I/O operations on the pipe.
PipeReset - Resets the pipe.
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