Function RTUSetPipeOption

If the function succeeds, RTU_SUCCESS is returned. On error, a negative error code is returned.

Option	Meaning
RTUTimeout	Assigns Value milliseconds as the new timeout for all future calls to RTUSendSetup using the given pipe. May only be used on pipes to Control endpoints.
RTUZPacket	Instructs RTUSB-32 to append a zero-length packet for all outgoing transactions which have a length which is a multiple of the endpoint's maximum packet length. This option is required if the protocol does not provide a way to specify the length of a transaction from the host to the device. Value 1 enables and 0 disables this option. It may only be used for Bulk and Interrupt OUT (host to device) endpoints.
RTUAsynch	The pipe will be used for asynchronous I/O. This option can be used to bypasss transaction polling as set by RTUSBConfig.EHCIMaxPollBulk. Setting this option's value to 1 (enable) will cause I/O on this endpoint to consume less CPU time, but the application may see a higher latency in receiving a notification that the transaction has completed. It has no impact on the time required to actually perform the transaction on the USB bus. This option may only be applied to a Bulk endpoint.
RTUIsoBufferList	This option may only be specified for Isochronous endpoints. Value 1 enables and 0 disables this option. If enabled, an array of RTUIsoBuffers must be passed to RTUStartIO instead of a send/receive buffer.