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Device Configuration
6
typedef const
struct usbd_drv_ep_info {
CPU_INT08U
CPU_INT08U
Attrib;
Nbr;
(1)
(2)
CPU_INT16U MaxPktSize;
(3)
} USBD_DRV_EP_INFO;
Listing 6-5 Endpoint Information Table Entry
L6-5(1)
The endpoint
Attrib
is a combination of the endpoint type
USBD_EP_INFO_TYPE and endpoint direction USBD_EP_INFO_DIR attributes.
The endpoint type can be defined as:
USBD_EP_INFO_TYPE_CTRL,
USBD_EP_INFO_TYPE_INTR , USBD_EP_INFO_TYPE_BULK , or USBD_EP_INFO_TYPE_ISOC .
The endpoint direction can be defined as either USBD_EP_INFO_DIR_IN or
USBD_EP_INFO_DIR_OUT .
L6-5(2)
L6-5(3)
The endpoint Nbr is the physical endpoint number used by the USB device
controller.
The endpoint MaxPktSize defines the maximum packet size supported by
hardware. The maximum packet size used by the USB device stack is validated
to follow the USB standard guidelines.
An example of an endpoint information table for a high-speed capable device is provided
below.
const USBD_DRV_EP_INFO USBD_DrvEP_InfoTbl_<controller>[] = {
{USBD_EP_INFO_TYPE_CTRL | USBD_EP_INFO_DIR_OUT,
{USBD_EP_INFO_TYPE_CTRL | USBD_EP_INFO_DIR_IN,
{USBD_EP_INFO_TYPE_BULK | USBD_EP_INFO_TYPE_INTR | USBD_EP_INFO_DIR_OUT,
{USBD_EP_INFO_TYPE_BULK | USBD_EP_INFO_TYPE_INTR | USBD_EP_INFO_DIR_IN,
0u, 64u},
0u, 64u},
1u, 1024u},
1u, 1024u},
{DEF_BIT_NONE ,
0u, 0u}
(1)
};
Listing 6-6 Example of Endpoint Information Table Configuration
L6-6(1)
The last entry on the endpoint information table must be an empty entry to
allow the USB device stack to determine the end of the table.
87
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