100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/********************************** (C) COPYRIGHT *******************************
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* File Name : main.c
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* Author : WCH
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* Version : V1.0.0
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* Date : 2024/02/21
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* Description : Main program body.
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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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/*
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* @note
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* The code initializes the power voltage detector (PVD) and enters low-power stop mode, waking up when
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* the PVD interrupt is triggered.
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*/
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#include "debug.h"
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/* Global define */
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/* Global Variable */
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void PVD_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));
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void PVD_IRQHandler(void)
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{
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if (EXTI_GetITStatus(EXTI_Line16) != RESET)
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{
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SystemInit();
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printf("Run at EXTI\r\n");
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EXTI_ClearITPendingBit(EXTI_Line16);
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}
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}
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/*********************************************************************
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* @fn PVD_Init
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*
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* @brief The function initializes the power voltage detector (PVD) by configuring the necessary registers and
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* enabling the PVD interrupt.
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*
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* @return none
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*/
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void PVD_Init(void)
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{
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
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EXTI_InitTypeDef EXIT_InitStructure = {0};
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NVIC_InitTypeDef NVIC_InitStructure = {0};
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EXIT_InitStructure.EXTI_Line = EXTI_Line16;
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EXIT_InitStructure.EXTI_LineCmd = ENABLE;
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EXIT_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
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EXIT_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
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EXTI_Init(&EXIT_InitStructure);
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NVIC_InitStructure.NVIC_IRQChannel = PVD_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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PWR_PVDLevelConfig(PWR_PVDLevel_2V2);
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PWR_PVDCmd(ENABLE);
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}
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/*********************************************************************
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* @fn main
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*
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* @brief Main program.
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*
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* @return none
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*/
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int main(void)
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{
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NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
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SystemCoreClockUpdate();
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Delay_Init();
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USART_Printf_Init(115200);
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printf("SystemClk:%d\r\n", SystemCoreClock);
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printf("ChipID:%08x\r\n", DBGMCU_GetCHIPID());
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printf("PVD wakeup TEST\r\n");
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/*Leave 1s for user to debug the chip*/
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Delay_Ms(1000);
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/* The code is initializing the power voltage detector (PVD) and then entering the low-power stop
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mode. */
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PVD_Init();
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printf("Fall asleep...\r\n");
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Delay_Ms(100);
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PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);
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printf("Wake up!!\r\n");
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while (1)
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{
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Delay_Ms(250);
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}
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}
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