Perform a synchronous interrupt transfer.

int32_t UsbInterruptXfer( 
    int32_t udev, 
    uint32_t pipe, 
    void *data, 
    uint32_t len, 
    uint32_t * actual_length, 
    uint32_t flags, 
    uint32_t interval,
    uint32_t timeout 
);

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.

actual_length

Pointer to a location which receives the count of actual bytes transfered.

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

interval

The interval defined in the interrupt endpoint descriptor

timeout

Timeout in milliseconds for the transfer. Use USB_WAIT_FOREVER to wait forever.

Return Values

USB_ERR_NORMAL_COMPLETION	Success. The operation was completed.
USB_ERR_NO_STACK	The USB stack is not ready.
USB_ERR_MEMORY	Memory could not be allocated for the operation.
USB_ERR_TIMEOUT	The device did not respond.

Requirements