/**
  ******************************************************************************
  * @file    main.c
  * @author  MCU Application Team
  * @brief   Main program body
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2023 Puya Semiconductor Co.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by Puya under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  * @attention
  *
  * <h2><center>&copy; Copyright (c) 2016 STMicroelectronics.
  * All rights reserved.</center></h2>
  *
  * This software component is licensed by ST under BSD 3-Clause license,
  * the "License"; You may not use this file except in compliance with the
  * License. You may obtain a copy of the License at:
  *                        opensource.org/licenses/BSD-3-Clause
  *
  ******************************************************************************
  */

/* Includes ------------------------------------------------------------------*/
#include "main.h"

/* Private define ------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private user code ---------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static void APP_SystemClockConfig(void);
static void APP_ConfigureEXTI(void);

/**
  * @brief  Main program
  * @retval int
  */
int main(void)
{
  /* Reset of all peripherals, Initializes the Systick */
  HAL_Init();
  
  /* Configure Systemclock */
  APP_SystemClockConfig(); 

  /* Initialize LED */
  BSP_LED_Init(LED_GREEN);

  /* Initialize  BUTTON */
  BSP_PB_Init(BUTTON_KEY,BUTTON_MODE_GPIO);

  /* Configure EXTI */
  APP_ConfigureEXTI();
  
  /* LED on */
  BSP_LED_On(LED_GREEN);
  
  /* Waiting for the user to press the button,program start running */
  while (BSP_PB_GetState(BUTTON_KEY) == 1)
  {
  }
  
  /* Suspend systick */
  HAL_SuspendTick();
  
  /* LED off */
  BSP_LED_Off(LED_GREEN);

  /* Low power STOP voltage 0.8V */
  HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE4);
  
  /* Enter STOP mode */
  HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFE);
  
  /* Resume systick */
  HAL_ResumeTick();
  
  /* Infinite loop */
  while (1)
  {
    /* LED blinking */
    BSP_LED_Toggle(LED_GREEN);
    HAL_Delay(500);
  }
}

/**
  * @brief   Configure systemclock
  * @param   None
  * @retval  None
  */
static void APP_SystemClockConfig(void)
{
  RCC_OscInitTypeDef  OscInitstruct = {0};
  RCC_ClkInitTypeDef  ClkInitstruct = {0};
  
  OscInitstruct.OscillatorType  = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_LSE | 
                                  RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_HSI48M;
  OscInitstruct.HSEState        = RCC_HSE_OFF;                              /* HSE OFF */
/* OscInitstruct.HSEFreq         = RCC_HSE_16_32MHz; */                     /* HSE clock range 16~32MHz */
  OscInitstruct.HSI48MState     = RCC_HSI48M_OFF;                           /* Disable HSI48M clock */
  OscInitstruct.HSIState        = RCC_HSI_ON;                               /* HSI ON */
  OscInitstruct.LSEState        = RCC_LSE_OFF;                              /* LSE OFF */
/* OscInitstruct.LSEDriver       = RCC_LSEDRIVE_HIGH; */                    /* LSE high drive capability */
  OscInitstruct.LSIState        = RCC_LSI_OFF;                              /* LSI OFF */
  OscInitstruct.PLL.PLLState    = RCC_PLL_OFF;                              /* PLL OFF */
/* OscInitstruct.PLL.PLLSource   = RCC_PLLSOURCE_HSE; */                    /* HSE oscillator clock selected as PLL clock entry */
/* OscInitstruct.PLL.PLLMUL      = RCC_PLL_MUL6; */                         /* PLLVCO = PLL clock entry x 6 */
  /* Initialize the RCC Oscillators */
  if(HAL_RCC_OscConfig(&OscInitstruct) != HAL_OK)
  {
    APP_ErrorHandler();
  }
  
  ClkInitstruct.ClockType       = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
  ClkInitstruct.SYSCLKSource    = RCC_SYSCLKSOURCE_HSI;                 /* Select HSI as system clock */
  ClkInitstruct.AHBCLKDivider   = RCC_SYSCLK_DIV1;                      /* SYSCLK not divided: HCLK=SYSCLK */
  ClkInitstruct.APB1CLKDivider  = RCC_HCLK_DIV1;                        /* HCLK not divided: PCLK1=HCLK */
  ClkInitstruct.APB2CLKDivider  = RCC_HCLK_DIV2;                        /* HCLK divided by 2: PCLK2=HCLK/2 */
  /* Set clock source */
  if(HAL_RCC_ClockConfig(&ClkInitstruct, FLASH_LATENCY_0) != HAL_OK)
  {
    APP_ErrorHandler();
  }
}

/**
  * @brief  Configure EXTI pin
  * @param  None
  * @retval None
  */
static void APP_ConfigureEXTI(void)
{
  GPIO_InitTypeDef  GPIO_InitStruct = {0};
  __HAL_RCC_GPIOA_CLK_ENABLE();                  /* Enable GPIOA clock */
  GPIO_InitStruct.Mode  = GPIO_MODE_EVT_FALLING; /* GPIO is set to external Interrupt Mode with Falling edge trigger detection */
  GPIO_InitStruct.Pull  = GPIO_PULLUP;           /* PULL UP */
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;  /* I/O speed: High speed */
  GPIO_InitStruct.Pin = GPIO_PIN_6;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
}


/**
  * @brief  Error handling function
  * @param  None
  * @retval None
  */
void APP_ErrorHandler(void)
{
  /* Infinite loop */
  while (1)
  {
  }
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file：Pointer to the source file name
  * @param  line：assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* User can add His own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* Infinite loop */
  while (1)
  {
  }
}
#endif /* USE_FULL_ASSERT */

/************************ (C) COPYRIGHT Puya *****END OF FILE******************/