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UsbBulkXferAsync
INtime SDK v6 > About INtime > Networking and I/O > USB > USB calls > UsbBulkXferAsync

Start an asynchronous bulk transfer.

int32_t UsbBulkXferAsync( 
int32_t udev,
uint32_t pipe,
void *data,
int32_t len,
uint32_t flags,
uint32_t timeout,
RTHANDLE mbx,
void (*cb_func)(),
void * cb_data
);

Parameters

udev
Device handle from UsbOpenDevice.
pipe 
Value describing the device, endpoint number, type, and transfer direction.
data 
User data buffer.
len 
Length in bytes of expected transfer.
flags 
Transfer flags. One of the following:
USB_FORCE_SHORT_XFER - force a short transmit last
USB_SHORT_XFER_OK - allow short reads
USB_DELAY_STATUS_STAGE - insert delay before STATUS
USB_MULTI_SHORT_OK  - allow multiple short frames
timeout 
Timeout in milliseconds for the transfer.
mbx 
Mailbox handle created by the user. The user must wait on this mailbox and expect a structure of type UsbAsynchNotifyArgs. The user may then call UsbAsynchNotifyArgs.cb_func() and pass any arguments they define. Usually cb_data is the preferred parameter.
cb_func
Pointer to a user-defined callback function.
cb_data 
User-defined callback data pointer, passed to callback function.  

Return Values

USB_ERR_NORMAL_COMPLETION Success. The asynchronous operation was started.
USB_ERR_NO_STACK The USB stack was not ready.
USB_ERR_INVAL The pipe or flags parameter was not valid.
USB_ERR_TIMEOUT The device did not respond within the timeout interval specified.
USB_ERR_NO_DEVICE The hdev parameter does not correspond to a valid device.
USB_ERR_FAULT A fault occured during the data transfer.
USB_ERR_SHORT_XFER The device did not transfer the requested number of bytes of data.
USB_ERR_STALLED The device stalled and the endpoint halted while trying to complete the operation.

Requirements

Versions Defined in Include Link to
INtime 5.0 intime/rt/include/usbif3h usbif3h usbif3lib
See Also