/********************************** (C) COPYRIGHT  *******************************
 * File Name          : ch32v20x_exti.h
 * Author             : WCH
 * Version            : V1.0.0
 * Date               : 2021/06/06
 * Description        : This file contains all the functions prototypes for the
 *                      EXTI 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 __CH32V20x_EXTI_H
#define __CH32V20x_EXTI_H

#ifdef __cplusplus
extern "C" {
#endif

#include "ch32v20x.h"

/* EXTI mode enumeration */
typedef enum
{
    EXTI_Mode_Interrupt = 0x00,
    EXTI_Mode_Event = 0x04
} EXTIMode_TypeDef;

/* EXTI Trigger enumeration */
typedef enum
{
    EXTI_Trigger_Rising = 0x08,
    EXTI_Trigger_Falling = 0x0C,
    EXTI_Trigger_Rising_Falling = 0x10
} EXTITrigger_TypeDef;

/* EXTI Init Structure definition */
typedef struct
{
    uint32_t EXTI_Line; /* Specifies the EXTI lines to be enabled or disabled.
                           This parameter can be any combination of @ref EXTI_Lines */

    EXTIMode_TypeDef EXTI_Mode; /* Specifies the mode for the EXTI lines.
                                   This parameter can be a value of @ref EXTIMode_TypeDef */

    EXTITrigger_TypeDef EXTI_Trigger; /* Specifies the trigger signal active edge for the EXTI lines.
                                         This parameter can be a value of @ref EXTIMode_TypeDef */

    FunctionalState EXTI_LineCmd; /* Specifies the new state of the selected EXTI lines.
                                     This parameter can be set either to ENABLE or DISABLE */
} EXTI_InitTypeDef;

/* EXTI_Lines */
#define EXTI_Line0     ((uint32_t)0x00001)  /* External interrupt line 0 */
#define EXTI_Line1     ((uint32_t)0x00002)  /* External interrupt line 1 */
#define EXTI_Line2     ((uint32_t)0x00004)  /* External interrupt line 2 */
#define EXTI_Line3     ((uint32_t)0x00008)  /* External interrupt line 3 */
#define EXTI_Line4     ((uint32_t)0x00010)  /* External interrupt line 4 */
#define EXTI_Line5     ((uint32_t)0x00020)  /* External interrupt line 5 */
#define EXTI_Line6     ((uint32_t)0x00040)  /* External interrupt line 6 */
#define EXTI_Line7     ((uint32_t)0x00080)  /* External interrupt line 7 */
#define EXTI_Line8     ((uint32_t)0x00100)  /* External interrupt line 8 */
#define EXTI_Line9     ((uint32_t)0x00200)  /* External interrupt line 9 */
#define EXTI_Line10    ((uint32_t)0x00400)  /* External interrupt line 10 */
#define EXTI_Line11    ((uint32_t)0x00800)  /* External interrupt line 11 */
#define EXTI_Line12    ((uint32_t)0x01000)  /* External interrupt line 12 */
#define EXTI_Line13    ((uint32_t)0x02000)  /* External interrupt line 13 */
#define EXTI_Line14    ((uint32_t)0x04000)  /* External interrupt line 14 */
#define EXTI_Line15    ((uint32_t)0x08000)  /* External interrupt line 15 */
#define EXTI_Line16    ((uint32_t)0x10000)  /* External interrupt line 16 Connected to the PVD Output */
#define EXTI_Line17    ((uint32_t)0x20000)  /* External interrupt line 17 Connected to the RTC Alarm event */
#define EXTI_Line18    ((uint32_t)0x40000)  /* External interrupt line 18 Connected to the USBD Device \
                                               Wakeup from suspend event */
#define EXTI_Line19    ((uint32_t)0x80000)  /* External interrupt line 19 Connected to the Ethernet Wakeup event */
#define EXTI_Line20    ((uint32_t)0x100000) /* External interrupt line 20 Connected to the USBFS Wakeup event */

#if defined(CH32V20x_D8) || defined(CH32V20x_D8W)
  #define EXTI_Line21    ((uint32_t)0x200000) /* External interrupt line 21 Connected to the OSCCAL Wakeup event */

#endif

void       EXTI_DeInit(void);
void       EXTI_Init(EXTI_InitTypeDef *EXTI_InitStruct);
void       EXTI_StructInit(EXTI_InitTypeDef *EXTI_InitStruct);
void       EXTI_GenerateSWInterrupt(uint32_t EXTI_Line);
FlagStatus EXTI_GetFlagStatus(uint32_t EXTI_Line);
void       EXTI_ClearFlag(uint32_t EXTI_Line);
ITStatus   EXTI_GetITStatus(uint32_t EXTI_Line);
void       EXTI_ClearITPendingBit(uint32_t EXTI_Line);

#ifdef __cplusplus
}
#endif

#endif
