/********************************** (C) COPYRIGHT  *******************************
 * File Name          : ch32v20x_misc.h
 * Author             : WCH
 * Version            : V1.0.0
 * Date               : 2021/06/06
 * Description        : This file contains all the functions prototypes for the
 *                      miscellaneous firmware library functions.
*********************************************************************************
* 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_MISC_H
#define __CH32V20x_MISC_H

#ifdef __cplusplus
extern "C" {
#endif

#include "ch32v20x.h"

/* CSR_INTSYSCR_INEST_definition */
#define INTSYSCR_INEST_NoEN   0x00   /* interrupt nesting disable(CSR-0x804 bit1 = 0) */
#define INTSYSCR_INEST_EN     0x01   /* interrupt nesting enable(CSR-0x804 bit1 = 1) */

/* Check the configuration of CSR(0x804) in the startup file(.S)
 *   interrupt nesting enable(CSR-0x804 bit1 = 1)
 *     priority - bit[7] - Preemption Priority
 *                bit[6:5] - Sub priority
 *                bit[4:0] - Reserve
 *   interrupt nesting disable(CSR-0x804 bit1 = 0)
 *     priority - bit[7:5] - Sub priority
 *                bit[4:0] - Reserve
 */

#ifndef INTSYSCR_INEST
#define INTSYSCR_INEST   INTSYSCR_INEST_EN
#endif

/* NVIC Init Structure definition
 *   interrupt nesting enable(CSR-0x804 bit1 = 1)
 *     NVIC_IRQChannelPreemptionPriority - range from 0 to 1.
 *     NVIC_IRQChannelSubPriority - range from 0 to 3.
 *
 *   interrupt nesting disable(CSR-0x804 bit1 = 0)
 *     NVIC_IRQChannelPreemptionPriority - range is 0.
 *     NVIC_IRQChannelSubPriority - range from 0 to 7.
 *
 */
typedef struct
{
    uint8_t NVIC_IRQChannel;
    uint8_t NVIC_IRQChannelPreemptionPriority;
    uint8_t NVIC_IRQChannelSubPriority;
    FunctionalState NVIC_IRQChannelCmd;
} NVIC_InitTypeDef;

/* Preemption_Priority_Group */
#if (INTSYSCR_INEST == INTSYSCR_INEST_NoEN)
#define NVIC_PriorityGroup_0           ((uint32_t)0x00) /* interrupt nesting disable(CSR-0x804 bit1 = 0) */
#else
#define NVIC_PriorityGroup_1           ((uint32_t)0x01) /* interrupt nesting enable(CSR-0x804 bit1 = 1) */
#endif

void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup);
void NVIC_Init(NVIC_InitTypeDef *NVIC_InitStruct);

#ifdef __cplusplus
}
#endif

#endif