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VxWorks Development - when hardware doesn’t support Ethernet - Pebble Bay

Control data transfer If the target application instead wants to communicate with the host using the default control pipes, it does so by using vxworks usb. The usbTargTransfer routine initiates a transfer on the pipe indicated by pipeHandle. Pipe handle Pipe handle. This element is not used for generic endpoint transfers. NOTE: Note that the target application does not consider this field to be accurately set until the target layer invokes the userCallback routine. The target application checks the result field of the ERP in this callback routine and responds appropriately.


The vxworks usb application does not need to set it or use it. This structure describes a block of data in the transfer. See Table The target application checks this value in the userCallback function. The first parameter of usbTargTransfer is the handle of the pipe on which the data is to be vxworks usb, and the second parameter is the ERP to be transferred.

The result field is set to OK for a successful transfer. The target application callback routine is called by the HAL. The target application can call the usbTargTransferAbort routine to abort a transfer that it previously submitted with the usbTargTransfer routine. When a transfer is aborted, the userCallback vxworks usb in pErp is called.


The result. Vxworks usb target application may stall or unstall the generic endpoints. It stalls the endpoint in response to certain error conditions. A target application uses the target layer routine usbTargPipeStatusSet to stall or unstall a particular endpoint. NOTE: Halt and stall are used interchangeably and have essentially the same meaning. The target layer sets the default control pipe to the stall state when it detects an error in the processing of a request on the default control pipe, for instance when the target application returns ERROR from a callback designed to handle a standard request.

Linux/AM5728: Software implementation of a USB 2.0 device controller under VxWorks

The target application can use the usbTargPipeStatusGet vxworks usb layer routine to determine whether the endpoint to a pipe is stalled or not. The target application uses this sent data vxworks usb various Control-IN requests for the host.

The target application uses the usbTargControlStatusSend routine to vxworks usb the status to the host when the control transfer does not have a data stage. The target application calls usbTargControlPayloadRcv to register a callback routine to receive control pipe responses from the host. Then, when the target application receives control data from the host, the callback routine is invoked and the pBfr points to vxworks usb control data. Some target applications, particularly those that implement isochronous data transfers, must determine the current USB frame number.

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Use the target layer routine usbTargCurrentFrameGet for this purpose. The target layer vxworks usb the current frame number in the pFrameNo parameter. Many devices support the remote wakeup and test mode features.

The test vxworks usb cannot be cleared. The second parameter of usbTargDeviceFeatureSet is ufeatureSelector, which specifies setting the remote wakeup or test mode feature see Table for a list of feature selector values. The third parameter, uTestSelector, specifies the test selector values see Table for a list of test selector values.

This routine can be used by the target application or the configlette to shut vxworks usb the USB peripheral stack. The target layer maintains a usage count initCount, which is incremented every 5 time usbTargInitialize is called. Similarly, the usage count is decremented on every corresponding call to usbTargShutdown. Only when the usage count reaches zero are all the attached TCDs detached, and all the resources allocated by the target layer released. Figure shows the target layer shutdown process. For instructions on how to create a target application that interfaces with the target layer in the Wind River USB peripheral stack, see 5. It carries out all of the hardware-independent functions of the target controller and makes the implementation of higher vxworks usb layers independent of the TCD.

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Cypress is a registered trademark and "Driving the Communications Revolution" and cypress. This answer is a stub.It explains how to use the Wind River USB peripheral stack vxworks usb create new target applications and target controller drivers. This manual assumes.

Course Overview. This course provides engineers with a methodology they can use to vxworks usb and boot VxWorks from a USB stick on a target board with an Intel.

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