USB SETUP请求结构体USB_DEFAULT_PIPE_SETUP_PACKET

USB_DEFAULT_PIPE_SETUP_PACKET结构体对应用USB标准请求的SETUP令牌包的8字节。
可以使用该结构体描述符Setup令牌包的详细信息。

//
// Chapter 9 USB Device Framework
//

//
// USB 1.1: 9.3 USB Device Requests, Table 9-2. Format of Setup Data
// USB 2.1: 9.3 USB Device Requests, Table 9-2. Format of Setup Data
// USB 3.0: 9.3 USB Device Requests, Table 9-2. Format of Setup Data
//
typedef union _BM_REQUEST_TYPE {
    struct _BM {
        UCHAR   Recipient:2;
        UCHAR   Reserved:3;
        UCHAR   Type:2;
        UCHAR   Dir:1;
#ifdef __cplusplus
        } s;
#else
        };
#endif
    UCHAR B;
} BM_REQUEST_TYPE, *PBM_REQUEST_TYPE;

typedef struct _USB_DEFAULT_PIPE_SETUP_PACKET {
    BM_REQUEST_TYPE bmRequestType;
    UCHAR bRequest;

    union _wValue {
        struct {
            UCHAR LowByte;
            UCHAR HiByte;
        };
        USHORT W;
    } wValue;

    union _wIndex {
        struct {
            UCHAR LowByte;
            UCHAR HiByte;
        };
        USHORT W;
    } wIndex;
    USHORT wLength;
} USB_DEFAULT_PIPE_SETUP_PACKET, *PUSB_DEFAULT_PIPE_SETUP_PACKET;

C_ASSERT(sizeof(USB_DEFAULT_PIPE_SETUP_PACKET) == 8);

//
// bmRequestType.Dir
//
#define BMREQUEST_HOST_TO_DEVICE        0
#define BMREQUEST_DEVICE_TO_HOST        1

//
// bmRequestType.Type
#define BMREQUEST_STANDARD              0
#define BMREQUEST_CLASS                 1
#define BMREQUEST_VENDOR                2

//
// bmRequestType.Recipient
//
#define BMREQUEST_TO_DEVICE             0
#define BMREQUEST_TO_INTERFACE          1
#define BMREQUEST_TO_ENDPOINT           2
#define BMREQUEST_TO_OTHER              3

//
// wValue for Get Descriptor request
//
#define USB_DESCRIPTOR_MAKE_TYPE_AND_INDEX(d, i) ((USHORT)((USHORT)d<<8 | i))

//
// USB 1.1: 9.4 Standard Device Requests, Table 9-4. Standard Request Codes
// USB 2.0: 9.4 Standard Device Requests, Table 9-4. Standard Request Codes
//
#define USB_REQUEST_GET_STATUS          0x00
#define USB_REQUEST_CLEAR_FEATURE       0x01
#define USB_REQUEST_SET_FEATURE         0x03
#define USB_REQUEST_SET_ADDRESS         0x05
#define USB_REQUEST_GET_DESCRIPTOR      0x06
#define USB_REQUEST_SET_DESCRIPTOR      0x07
#define USB_REQUEST_GET_CONFIGURATION   0x08
#define USB_REQUEST_SET_CONFIGURATION   0x09
#define USB_REQUEST_GET_INTERFACE       0x0A
#define USB_REQUEST_SET_INTERFACE       0x0B
#define USB_REQUEST_SYNC_FRAME          0x0C

#define USB_REQUEST_GET_FIRMWARE_STATUS 0x1A
#define USB_REQUEST_SET_FIRMWARE_STATUS 0x1B