95 lines
2.8 KiB
C
95 lines
2.8 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 : 2021/06/06
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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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*low power, sleep mode routine:
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*EXTI_Line0(PA0)
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*This routine demonstrates WFI enters sleep mode, PA0 pin input low level triggers external
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*interrupt EXTI_Line0 to exit sleep mode,Program execution continues after wake-up.
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*
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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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/*********************************************************************
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* @fn EXTI0_INT_INIT
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*
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* @brief Initializes EXTI0 collection.
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*
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* @return none
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*/
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void EXTI0_INT_INIT(void)
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{
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GPIO_InitTypeDef GPIO_InitStructure = {0};
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EXTI_InitTypeDef EXTI_InitStructure = {0};
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NVIC_InitTypeDef NVIC_InitStructure = {0};
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO | RCC_APB2Periph_GPIOA, ENABLE);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
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GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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/* GPIOA.0 ----> EXTI_Line0 */
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GPIO_EXTILineConfig(GPIO_PortSourceGPIOA, GPIO_PinSource0);
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EXTI_InitStructure.EXTI_Line = EXTI_Line0;
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EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
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EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
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EXTI_InitStructure.EXTI_LineCmd = ENABLE;
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EXTI_Init(&EXTI_InitStructure);
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NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
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NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
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NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
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NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
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NVIC_Init(&NVIC_InitStructure);
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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_2);
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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("Sleep Mode Test\r\n");
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EXTI0_INT_INIT();
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printf("\r\n ********** \r\n");
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if(((RCC->CFGR0 & RCC_SWS)==0x04)||((RCC->CFGR0 & RCC_PLLSRC) == RCC_PLLSRC))
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{
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RCC_HSICmd(DISABLE);
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}
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__WFI();
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printf("\r\n ########## \r\n");
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while(1)
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{
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Delay_Ms(1000);
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printf("Run in main\r\n");
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}
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}
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