/********************************** (C) COPYRIGHT *******************************
 * File Name          : usb_core.h
 * Author             : WCH
 * Version            : V1.0.0
 * Date               : 2021/08/08
 * Description        : This file contains all the functions prototypes for the  
 *                      USB cor firmware library.
*********************************************************************************
* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
* Attention: This software (modified or not) and binary are used for 
* microcontroller manufactured by Nanjing Qinheng Microelectronics.
*******************************************************************************/ 
#ifndef __USB_CORE_H
#define __USB_CORE_H

#ifdef __cplusplus
 extern "C" {
#endif

#include "ch32v20x.h"

	 
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;

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
{
  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 */
  void (*Process_Status_IN)(void);
  void (*Process_Status_OUT)(void);

  RESULT (*Class_Data_Setup)(uint8_t RequestNo);

  RESULT (*Class_NoData_Setup)(uint8_t RequestNo);

  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);

  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;


#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


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;

#ifdef __cplusplus
}
#endif

#endif /* __USB_CORE_H */