81 lines
2.4 KiB
C
81 lines
2.4 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, standby mode routine:
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*WKUP(PA0)
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*This routine demonstrates that WFI enters the standby mode, the rising edge of
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*the WKUP (PA0) pin exits the standby mode,Program reset after wake-up.
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*Note: In order to reduce power consumption as much as possible, it is
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*recommended to set the unused GPIO to pull-down mode.
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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 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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GPIO_InitTypeDef GPIO_InitStructure = {0};
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/* To reduce power consumption, unused GPIOs need to be set as pull-down inputs */
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RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|
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RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOE, ENABLE);
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GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
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GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPD;
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GPIO_Init(GPIOA, &GPIO_InitStructure);
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GPIO_Init(GPIOB, &GPIO_InitStructure);
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GPIO_Init(GPIOC, &GPIO_InitStructure);
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GPIO_Init(GPIOD, &GPIO_InitStructure);
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GPIO_Init(GPIOE, &GPIO_InitStructure);
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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("Standby Mode Test\r\n");
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RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
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if(PWR_GetFlagStatus(PWR_FLAG_WU) == SET)
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{
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printf("\r\n Standby wake up reset \r\n");
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}
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else
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{
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printf("\r\n Power on reset \r\n");
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PWR_WakeUpPinCmd(ENABLE);
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PWR_EnterSTANDBYMode();
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}
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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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