GET_ISO_URB_SIZE macro (usbdlib.h)

The GET_ISO_URB_SIZE macro returns the number of bytes required to hold an isochronous transfer request.

Syntax

#define  GET_ISO_URB_SIZE(n) (sizeof(struct _URB_ISOCH_TRANSFER)+\
        sizeof(USBD_ISO_PACKET_DESCRIPTOR)*n)

Parameters

n

Specifies the number of isochronous transfer packets that will be part of the transfer request.

Return value

None

Remarks

Gets the number of bytes required to hold an isochronous request with the given number of packets (n).

Requirements

See also

• Routines for USB Client Drivers
• URB
• USBD_ISO_PACKET_DESCRIPTOR
• _URB_ISOCH_TRANSFER