106 lines
4.5 KiB
C
106 lines
4.5 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : ch32v30x_misc.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2024/03/06
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* Description : This file provides all the miscellaneous firmware functions .
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*********************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* Attention: This software (modified or not) and binary are used for
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* microcontroller manufactured by Nanjing Qinheng Microelectronics.
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*******************************************************************************/
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#include "ch32v30x_misc.h"
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__IO uint32_t NVIC_Priority_Group = 0;
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/*********************************************************************
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* @fn NVIC_PriorityGroupConfig
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*
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* @brief Configures the priority grouping - pre-emption priority and subpriority.
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*
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* @param NVIC_PriorityGroup - specifies the priority grouping bits length.
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* NVIC_PriorityGroup_0 - 0 bits for pre-emption priority
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* 3 bits for subpriority
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* NVIC_PriorityGroup_1 - 1 bits for pre-emption priority
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* 2 bits for subpriority
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* NVIC_PriorityGroup_2 - 2 bits for pre-emption priority
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* 1 bits for subpriority
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* NVIC_PriorityGroup_3 - 3 bits for pre-emption priority
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* 0 bits for subpriority
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*
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* @return none
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*/
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void NVIC_PriorityGroupConfig(uint32_t NVIC_PriorityGroup)
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{
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NVIC_Priority_Group = NVIC_PriorityGroup;
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}
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/*********************************************************************
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* @fn NVIC_Init
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*
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* @brief Initializes the NVIC peripheral according to the specified parameters in
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* the NVIC_InitStruct.
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*
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* @param NVIC_InitStruct - pointer to a NVIC_InitTypeDef structure that contains the
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* configuration information for the specified NVIC peripheral.
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* interrupt nesting disable(CSR-0x804 bit1 = 0)
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* NVIC_IRQChannelPreemptionPriority - range is 0.
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* NVIC_IRQChannelSubPriority - range from 0 to 7.
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*
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* interrupt nesting enable-2 Level(CSR-0x804 bit1 = 1 bit[3:2] = 1)
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* NVIC_IRQChannelPreemptionPriority - range from 0 to 1.
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* NVIC_IRQChannelSubPriority - range from 0 to 3.
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*
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* interrupt nesting enable-4 Level(CSR-0x804 bit1 = 1 bit[3:2] = 2)
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* NVIC_IRQChannelPreemptionPriority - range from 0 to 3.
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* NVIC_IRQChannelSubPriority - range from 0 to 1.
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*
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* interrupt nesting enable-8 Level(CSR-0x804 bit1 = 1 bit[3:2] = 3)
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* NVIC_IRQChannelPreemptionPriority - range from 0 to 7.
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* NVIC_IRQChannelSubPriority - range range is 0.
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*
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* @return none
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*/
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void NVIC_Init(NVIC_InitTypeDef *NVIC_InitStruct)
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{
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#if (INTSYSCR_INEST == INTSYSCR_INEST_NoEN)
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if(NVIC_Priority_Group == NVIC_PriorityGroup_0)
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{
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NVIC_SetPriority(NVIC_InitStruct->NVIC_IRQChannel, NVIC_InitStruct->NVIC_IRQChannelSubPriority << 4);
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}
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#elif (INTSYSCR_INEST == INTSYSCR_INEST_EN_2Level)
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if(NVIC_Priority_Group == NVIC_PriorityGroup_1)
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{
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if(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority < 2)
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{
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NVIC_SetPriority(NVIC_InitStruct->NVIC_IRQChannel, (NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << 7) | (NVIC_InitStruct->NVIC_IRQChannelSubPriority << 5));
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}
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}
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#elif (INTSYSCR_INEST == INTSYSCR_INEST_EN_4Level)
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if(NVIC_Priority_Group == NVIC_PriorityGroup_2)
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{
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if(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority < 4)
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{
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NVIC_SetPriority(NVIC_InitStruct->NVIC_IRQChannel, (NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << 6) | (NVIC_InitStruct->NVIC_IRQChannelSubPriority << 5));
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}
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}
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#elif (INTSYSCR_INEST == INTSYSCR_INEST_EN_8Level)
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if(NVIC_Priority_Group == NVIC_PriorityGroup_3)
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{
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if(NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority < 8)
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{
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NVIC_SetPriority(NVIC_InitStruct->NVIC_IRQChannel, (NVIC_InitStruct->NVIC_IRQChannelPreemptionPriority << 5) );
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}
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}
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#endif
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if(NVIC_InitStruct->NVIC_IRQChannelCmd != DISABLE)
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{
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NVIC_EnableIRQ(NVIC_InitStruct->NVIC_IRQChannel);
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}
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else
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{
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NVIC_DisableIRQ(NVIC_InitStruct->NVIC_IRQChannel);
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}
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}
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