/********************************** (C) COPYRIGHT *******************************
* File Name          : ch32v10x_misc.c
* Author             : WCH
* Version            : V1.0.0
* Date               : 2020/04/30
* Description        : This file provides all the miscellaneous firmware functions .
*********************************************************************************/
#include "ch32v10x_misc.h"

__IO uint32_t NVIC_Priority_Group = 0;

/******************************************************************************************
* Function Name  : NVIC_PriorityGroupConfig
* Description    : Configures the priority grouping: pre-emption priority and subpriority. 
* Input          : NVIC_PriorityGroup: specifies the priority grouping bits length.
*                    NVIC_PriorityGroup_0: 0 bits for pre-emption priority
*                                          4 bits for subpriority
*										 NVIC_PriorityGroup_1: 1 bits for pre-emption priority	
*                                          3 bits for subpriority
*                    NVIC_PriorityGroup_2: 2 bits for pre-emption priority
*                                          2 bits for subpriority
*                    NVIC_PriorityGroup_3: 3 bits for pre-emption priority
*                                          1 bits for subpriority
*                    NVIC_PriorityGroup_4: 4 bits for pre-emption priority
*                                          0 bits for subpriority                        
* Return         : None
*******************************************************************************************/
void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup)
{
	NVIC_Priority_Group = NVIC_PriorityGroup;
}

/******************************************************************************************
* Function Name  : NVIC_Init
* Description    : Initializes the NVIC peripheral according to the specified parameters in 
*                  the NVIC_InitStruct. 
* Input          : NVIC_InitStruct: pointer to a NVIC_InitTypeDef structure that contains the
*                                   configuration information for the specified NVIC peripheral.                 
* Return         : None
*******************************************************************************************/
void NVIC_Init(NVIC_InitTypeDef* NVIC_InitStruct)
{
	uint8_t tmppre = 0;

	if(NVIC_Priority_Group == NVIC_PriorityGroup_0)
	{
		NVIC_SetPriority( NVIC_InitStruct->NVIC_IRQChannel, NVIC_InitStruct->NVIC_IRQChannelSubPriority<<4);
	}
	else if(NVIC_Priority_Group == NVIC_PriorityGroup_1)
	{
    if(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority == 1)
    {
    	NVIC_SetPriority( NVIC_InitStruct->NVIC_IRQChannel, (1<<7)|(NVIC_InitStruct->NVIC_IRQChannelSubPriority<<4));
    }
    else
    {
    	NVIC_SetPriority( NVIC_InitStruct->NVIC_IRQChannel, (0<<7)|(NVIC_InitStruct->NVIC_IRQChannelSubPriority<<4));
    }
	}
	else if(NVIC_Priority_Group == NVIC_PriorityGroup_2)
	{
    if(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority <= 1)
    {
      tmppre = NVIC_InitStruct->NVIC_IRQChannelSubPriority + (4*NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority);
    	NVIC_SetPriority( NVIC_InitStruct->NVIC_IRQChannel, (0<<7)|(tmppre<<4));
    }
    else
    {
      tmppre = NVIC_InitStruct->NVIC_IRQChannelSubPriority + (4*(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority-2));
    	NVIC_SetPriority( NVIC_InitStruct->NVIC_IRQChannel, (1<<7)|(tmppre<<4));
    }
	}
	else if(NVIC_Priority_Group == NVIC_PriorityGroup_3)
	{
    if(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority <= 3)
    {
      tmppre = NVIC_InitStruct->NVIC_IRQChannelSubPriority + (2*NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority);
    	NVIC_SetPriority( NVIC_InitStruct->NVIC_IRQChannel, (0<<7)|(tmppre<<4));
    }
    else
    {
      tmppre = NVIC_InitStruct->NVIC_IRQChannelSubPriority + (2*(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority-4));
    	NVIC_SetPriority( NVIC_InitStruct->NVIC_IRQChannel, (1<<7)|(tmppre<<4));
    }
	}
	else if(NVIC_Priority_Group == NVIC_PriorityGroup_4)
	{
		NVIC_SetPriority( NVIC_InitStruct->NVIC_IRQChannel, NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority<<4);
	}

  if (NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE)
  {
  	NVIC_EnableIRQ(NVIC_InitStruct->NVIC_IRQChannel);
  }
  else
  {
  	NVIC_DisableIRQ(NVIC_InitStruct->NVIC_IRQChannel);
  }
}