/**
  ******************************************************************************
  * @file    usb_core.h
  * @author  NONE
  * @version NONE
  * @date    NONE
  * @brief   NONE
  ******************************************************************************/


/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __USB_CORE_H
#define __USB_CORE_H

/* Includes ------------------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
typedef enum _CONTROL_STATE
{
    WAIT_SETUP,      /* 0 */
    SETTING_UP,      /* 1 */
    IN_DATA,         /* 2 */
    OUT_DATA,        /* 3 */
    LAST_IN_DATA,    /* 4 */
    LAST_OUT_DATA,   /* 5 */
    WAIT_STATUS_IN,  /* 7 */
    WAIT_STATUS_OUT, /* 8 */
    STALLED,         /* 9 */
    PAUSE            /* 10 */
} CONTROL_STATE;     /* The state machine states of a control pipe */

typedef struct OneDescriptor
{
    uint8_t *Descriptor;
    uint16_t Descriptor_Size;
} ONE_DESCRIPTOR, *PONE_DESCRIPTOR;
/* All the request process routines return a value of this type
   If the return value is not SUCCESS or NOT_READY,
   the software will STALL the correspond endpoint */
typedef enum _RESULT
{
    USB_SUCCESS = 0, /* Process successfully */
    USB_ERROR,
    USB_UNSUPPORT,
    USB_NOT_READY /* The process has not been finished, endpoint will be
                         NAK to further request */
} RESULT;


/*-*-*-*-*-*-*-*-*-*-* Definitions for endpoint level -*-*-*-*-*-*-*-*-*-*-*-*/
typedef struct _ENDPOINT_INFO
{
    /* When send data out of the device,
   CopyData() is used to get data buffer 'Length' bytes data
   if Length is 0,
    CopyData() returns the total length of the data
    if the request is not supported, returns 0
    (NEW Feature )
     if CopyData() returns -1, the calling routine should not proceed
     further and will resume the SETUP process by the class device
   if Length is not 0,
    CopyData() returns a pointer to indicate the data location
   Usb_wLength is the data remain to be sent,
   Usb_wOffset is the Offset of original data
  When receive data from the host,
   CopyData() is used to get user data buffer which is capable
   of Length bytes data to copy data from the endpoint buffer.
   if Length is 0,
    CopyData() returns the available data length,
   if Length is not 0,
    CopyData() returns user buffer address
   Usb_rLength is the data remain to be received,
   Usb_rPointer is the Offset of data buffer
  */
    uint16_t Usb_wLength;
    uint16_t Usb_wOffset;
    uint16_t PacketSize;
    uint8_t *(*CopyData)(uint16_t Length);
} ENDPOINT_INFO;

/*-*-*-*-*-*-*-*-*-*-*-* Definitions for device level -*-*-*-*-*-*-*-*-*-*-*-*/

typedef struct _DEVICE
{
    uint8_t Total_Endpoint;      /* Number of endpoints that are used */
    uint8_t Total_Configuration; /* Number of configuration available */
} DEVICE;

typedef union {
    uint16_t w;
    struct BW
    {
        uint8_t bb1;
        uint8_t bb0;
    } bw;
} uint16_t_uint8_t;

typedef struct _DEVICE_INFO
{
    uint8_t          USBbmRequestType; /* bmRequestType */
    uint8_t          USBbRequest;      /* bRequest */
    uint16_t_uint8_t USBwValues;       /* wValue */
    uint16_t_uint8_t USBwIndexs;       /* wIndex */
    uint16_t_uint8_t USBwLengths;      /* wLength */

    uint8_t ControlState;              /* of type CONTROL_STATE */
    uint8_t Current_Feature;
    uint8_t Current_Configuration;     /* Selected configuration */
    uint8_t Current_Interface;         /* Selected interface of current configuration */
    uint8_t Current_AlternateSetting;  /* Selected Alternate Setting of current
                                     interface*/

    ENDPOINT_INFO Ctrl_Info;
} DEVICE_INFO;

typedef struct _DEVICE_PROP
{
    void (*Init)(void);  /* Initialize the device */
    void (*Reset)(void); /* Reset routine of this device */

    /* Device dependent process after the status stage */
    void (*Process_Status_IN)(void);
    void (*Process_Status_OUT)(void);

    /* Procedure of process on setup stage of a class specified request with data stage */
    /* All class specified requests with data stage are processed in Class_Data_Setup
   Class_Data_Setup()
    responses to check all special requests and fills ENDPOINT_INFO
    according to the request
    If IN tokens are expected, then wLength & wOffset will be filled
    with the total transferring bytes and the starting position
    If OUT tokens are expected, then rLength & rOffset will be filled
    with the total expected bytes and the starting position in the buffer

    If the request is valid, Class_Data_Setup returns SUCCESS, else UNSUPPORT

   CAUTION:
    Since GET_CONFIGURATION & GET_INTERFACE are highly related to
    the individual classes, they will be checked and processed here.
  */
    RESULT (*Class_Data_Setup)
    (uint8_t RequestNo);

    /* Procedure of process on setup stage of a class specified request without data stage */
    /* All class specified requests without data stage are processed in Class_NoData_Setup
   Class_NoData_Setup
    responses to check all special requests and perform the request

   CAUTION:
    Since SET_CONFIGURATION & SET_INTERFACE are highly related to
    the individual classes, they will be checked and processed here.
  */
    RESULT (*Class_NoData_Setup)
    (uint8_t RequestNo);

    /*Class_Get_Interface_Setting
   This function is used by the file usb_core.c to test if the selected Interface
   and Alternate Setting (uint8_t Interface, uint8_t AlternateSetting) are supported by
   the application.
   This function is writing by user. It should return "SUCCESS" if the Interface
   and Alternate Setting are supported by the application or "UNSUPPORT" if they
   are not supported. */

    RESULT (*Class_Get_Interface_Setting)
    (uint8_t Interface, uint8_t AlternateSetting);

    uint8_t *(*GetDeviceDescriptor)(uint16_t Length);
    uint8_t *(*GetConfigDescriptor)(uint16_t Length);
    uint8_t *(*GetStringDescriptor)(uint16_t Length);

    /* This field is not used in current library version. It is kept only for 
   compatibility with previous versions */
    void *RxEP_buffer;

    uint8_t MaxPacketSize;

} DEVICE_PROP;

typedef struct _USER_STANDARD_REQUESTS
{
    void (*User_GetConfiguration)(void);   /* Get Configuration */
    void (*User_SetConfiguration)(void);   /* Set Configuration */
    void (*User_GetInterface)(void);       /* Get Interface */
    void (*User_SetInterface)(void);       /* Set Interface */
    void (*User_GetStatus)(void);          /* Get Status */
    void (*User_ClearFeature)(void);       /* Clear Feature */
    void (*User_SetEndPointFeature)(void); /* Set Endpoint Feature */
    void (*User_SetDeviceFeature)(void);   /* Set Device Feature */
    void (*User_SetDeviceAddress)(void);   /* Set Device Address */
} USER_STANDARD_REQUESTS;

/* Exported constants --------------------------------------------------------*/
#define Type_Recipient (pInformation->USBbmRequestType & (REQUEST_TYPE | RECIPIENT))

#define Usb_rLength Usb_wLength
#define Usb_rOffset Usb_wOffset

#define USBwValue   USBwValues.w
#define USBwValue0  USBwValues.bw.bb0
#define USBwValue1  USBwValues.bw.bb1
#define USBwIndex   USBwIndexs.w
#define USBwIndex0  USBwIndexs.bw.bb0
#define USBwIndex1  USBwIndexs.bw.bb1
#define USBwLength  USBwLengths.w
#define USBwLength0 USBwLengths.bw.bb0
#define USBwLength1 USBwLengths.bw.bb1

/* Exported macro ------------------------------------------------------------*/
/* Exported functions ------------------------------------------------------- */
uint8_t Setup0_Process(void);
uint8_t Post0_Process(void);
uint8_t Out0_Process(void);
uint8_t In0_Process(void);

RESULT Standard_SetEndPointFeature(void);
RESULT Standard_SetDeviceFeature(void);

uint8_t *Standard_GetConfiguration(uint16_t Length);
RESULT   Standard_SetConfiguration(void);
uint8_t *Standard_GetInterface(uint16_t Length);
RESULT   Standard_SetInterface(void);
uint8_t *Standard_GetDescriptorData(uint16_t Length, PONE_DESCRIPTOR pDesc);

uint8_t *Standard_GetStatus(uint16_t Length);
RESULT   Standard_ClearFeature(void);
void     SetDeviceAddress(uint8_t);
void     NOP_Process(void);

extern DEVICE_PROP            Device_Property;
extern USER_STANDARD_REQUESTS User_Standard_Requests;
extern DEVICE                 Device_Table;
extern DEVICE_INFO            Device_Info;

/* cells saving status during interrupt servicing */
extern __IO uint16_t SaveRState;
extern __IO uint16_t SaveTState;

#endif /* __USB_CORE_H */

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