/**
*     Copyright (c) 2023, Nations Technologies Inc.
* 
*     All rights reserved.
*
*     This software is the exclusive property of Nations Technologies Inc. (Hereinafter 
* referred to as NATIONS). This software, and the product of NATIONS described herein 
* (Hereinafter referred to as the Product) are owned by NATIONS under the laws and treaties
* of the People's Republic of China and other applicable jurisdictions worldwide.
*
*     NATIONS does not grant any license under its patents, copyrights, trademarks, or other 
* intellectual property rights. Names and brands of third party may be mentioned or referred 
* thereto (if any) for identification purposes only.
*
*     NATIONS reserves the right to make changes, corrections, enhancements, modifications, and 
* improvements to this software at any time without notice. Please contact NATIONS and obtain 
* the latest version of this software before placing orders.

*     Although NATIONS has attempted to provide accurate and reliable information, NATIONS assumes 
* no responsibility for the accuracy and reliability of this software.
* 
*     It is the responsibility of the user of this software to properly design, program, and test 
* the functionality and safety of any application made of this information and any resulting product. 
* In no event shall NATIONS be liable for any direct, indirect, incidental, special,exemplary, or 
* consequential damages arising in any way out of the use of this software or the Product.
*
*     NATIONS Products are neither intended nor warranted for usage in systems or equipment, any
* malfunction or failure of which may cause loss of human life, bodily injury or severe property 
* damage. Such applications are deemed, "Insecure Usage".
*
*     All Insecure Usage shall be made at user's risk. User shall indemnify NATIONS and hold NATIONS 
* harmless from and against all claims, costs, damages, and other liabilities, arising from or related 
* to any customer's Insecure Usage.

*     Any express or implied warranty with regard to this software or the Product, including,but not 
* limited to, the warranties of merchantability, fitness for a particular purpose and non-infringement
* are disclaimed to the fullest extent permitted by law.

*     Unless otherwise explicitly permitted by NATIONS, anyone may not duplicate, modify, transcribe
* or otherwise distribute this software for any purposes, in whole or in part.
*
*     NATIONS products and technologies shall not be used for or incorporated into any products or systems
* whose manufacture, use, or sale is prohibited under any applicable domestic or foreign laws or regulations. 
* User shall comply with any applicable export control laws and regulations promulgated and administered by 
* the governments of any countries asserting jurisdiction over the parties or transactions.
**/

/**
*\*\file main.c
*\*\author Nations
*\*\version v1.0.0
*\*\copyright Copyright (c) 2023, Nations Technologies Inc. All rights reserved.
**/

#include "main.h"
#include "log.h"
#include <stdio.h>
#include <stdint.h>

void delay(vu32 nCount);
void KeyInputExtiInit(GPIO_Module* GPIOx, uint16_t Pin);

/**
*\*\name    main.
*\*\fun     Main program.
*\*\param   none
*\*\return  none
**/
int main(void)
{
    /*   At this stage the microcontroller clock setting is already configured,
         this is done through SystemInit() function which is called from startup
         file (startup_n32h4xx.s) before to branch to application main.
         To reconfigure the default setting of SystemInit() function, refer to
         system_n32h47x_48x.c file
    */
    log_init(); 
    log_info("\r\n --- Reset --- \r\n");
    
    /* Enable PWR Clock */
    RCC_EnableAPB1PeriphClk(RCC_APB1_PERIPH_PWR, ENABLE);
    /* Initialize Key button Interrupt to wake up the low power*/
    KeyInputExtiInit(KEY_INPUT_PORT, KEY_INPUT_PIN);
    /* Clear the Interrupt flag */
    EXTI_ClrITPendBit(KEY_EXTI_LINE);
    
    while (1)
    {
       /* Insert a long delay */
       delay(700);
       log_info("Entry SLEEP mode\n");
       /* Request to enter SLEEP mode*/
       PWR_EnterSLEEPMode(PWR_SLEEP_NOW, PWR_SLEEPENTRY_WFI);
       log_info("Exit SLEEP mode\n");
    }
}

/**
*\*\name    delay.
*\*\fun     Delay function.
*\*\param   nCount
*\*\return  none
**/
void delay(vu32 nCount)
{
    vu32 index = 0;
    for (index = (34000 * nCount); index != 0; index--)
    {
    }
}

/**
*\*\name    KeyInputExtiInit.
*\*\fun     Configures key GPIO.
*\*\param   GPIOx
*\*\param   Pin
*\*\return  none
**/
void KeyInputExtiInit(GPIO_Module* GPIOx, uint16_t Pin)
{
    GPIO_InitType GPIO_InitStructure;
    EXTI_InitType EXTI_InitStructure;
    NVIC_InitType NVIC_InitStructure;
 
    /* Enable the GPIO Clock */
    RCC_EnableAHB1PeriphClk(RCC_AHB_PERIPHEN_GPIOA, ENABLE);

    /*Configure the GPIO pin as input floating*/
    GPIO_InitStruct(&GPIO_InitStructure);
    GPIO_InitStructure.Pin        = Pin;
    GPIO_InitStructure.GPIO_Mode  = GPIO_MODE_INPUT;
    GPIO_InitPeripheral(GPIOx, &GPIO_InitStructure);

    /*Configure key EXTI Line to key input  Pin*/
    GPIO_ConfigEXTILine(KEY_EXTI_LINE_SOURCE, GPIOA_PORT_SOURCE, KEY_GPIO_PIN_SOURCE);

    /*Configure key EXTI line*/
    EXTI_InitStructure.EXTI_Line = KEY_EXTI_LINE;
    EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
    EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
    EXTI_InitStructure.EXTI_LineCmd = ENABLE;
    EXTI_InitPeripheral(&EXTI_InitStructure);

    /*Set key input interrupt priority*/
    NVIC_InitStructure.NVIC_IRQChannel                   = KEY_EXTI_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0x05;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority        = 0x0F;
    NVIC_InitStructure.NVIC_IRQChannelCmd                = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}
