VI_ATTR_USB_END_IN
Resource Classes
USB RAW
Attribute Information
| Access Privilege | Data Type | Range | Default |
|---|---|---|---|
|
Read/Write Local |
ViUInt16 |
VI_USB_END_NONE (0) |
VI_USB_END_SHORT_OR_COUNT |
Description
VI_ATTR_USB_END_IN indicates the method used to terminate read operations.
If it is set to VI_USB_END_NONE, short packets are ignored for read operations, so reads will not terminate until all of the requested data is received (or an error occurs).
If it is set to VI_USB_END_SHORT, the read operation will terminate on a short packet; use this if the device will terminate all read transfers with a short packet, including sending a zero (short) packet when the last data packet is full.
If it is set to VI_USB_END_SHORT_OR_COUNT, the read operation will terminate on a short packet or when it receives the requested count of data bytes; use this if the device does not send zero packets.
Related Topics