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/**
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******************************************************************************
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* @file main.c
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* @author MCU Application Team
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* @brief Main program body
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2023 Puya Semiconductor Co.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by Puya under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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* @attention
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*
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* <h2><center>© Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.</center></h2>
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*
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* This software component is licensed by ST under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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******************************************************************************
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*/
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/* Includes ------------------------------------------------------------------*/
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#include "main.h"
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/* Private define ------------------------------------------------------------*/
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#define WINDOW_IN /* Refresh WWDG Within the window time*/
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/* #define WINDOW_UPPER */ /* Refresh WWDG outside the window time upper limit */
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/* #define WINDOW_LOWER */ /* Refresh WWDG outside the window time lower limit */
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/* Private variables ---------------------------------------------------------*/
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WWDG_HandleTypeDef WwdgHandle;
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uint32_t delay;
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/* Private user code ---------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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static void APP_SystemClockConfig(void);
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static uint32_t APP_TimeoutCalculation(uint32_t timevalue);
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/**
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* @brief Main program
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* @retval int
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*/
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int main(void)
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{
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/* Reset of all peripherals, Initializes the Systick */
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HAL_Init();
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/* Configure Systemclock */
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APP_SystemClockConfig();
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/* Initialize button */
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BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_GPIO);
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/* Initialize LED */
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BSP_LED_Init(LED_GREEN);
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if (__HAL_RCC_GET_FLAG(RCC_FLAG_WWDGRST) != RESET)
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{
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/* LED ON */
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BSP_LED_On(LED_GREEN);
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/* Delay 4s */
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HAL_Delay(4000);
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/* LED off */
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BSP_LED_Off(LED_GREEN);
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/* Delay 500ms */
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HAL_Delay(500);
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/* Set RMVF bit to clear the reset flags */
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__HAL_RCC_CLEAR_RESET_FLAGS();
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}
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else
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{
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/* LED off */
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BSP_LED_Off(LED_GREEN);
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}
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/* Initialize WWDG */
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WwdgHandle.Instance = WWDG; /* Select WWDG */
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WwdgHandle.Init.Prescaler = WWDG_PRESCALER_8; /* WWDG counter clock = (PCLK1/4096)/8 */
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WwdgHandle.Init.Window = 0x50; /* WWDG window value */
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WwdgHandle.Init.Counter = 0x7F; /* WWDG free-running downcounter value(7 bit) */
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WwdgHandle.Init.EWIMode = WWDG_EWI_DISABLE; /* EWI disable */
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/* Initialize WWDG */
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if (HAL_WWDG_Init(&WwdgHandle) != HAL_OK)
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{
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APP_ErrorHandler();
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}
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#if defined(WINDOW_IN)
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delay = APP_TimeoutCalculation((WwdgHandle.Init.Counter - WwdgHandle.Init.Window) + 1) + 1; /* Within the window */
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#elif defined(WINDOW_UPPER)
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delay = APP_TimeoutCalculation((WwdgHandle.Init.Counter - WwdgHandle.Init.Window)-5 ) + 1; /* Outside the window time upper limit */
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#else
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delay = APP_TimeoutCalculation((WwdgHandle.Init.Counter - 0x3f) +5) + 1; /* outside the window time lower limit */
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#endif
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/* Infinite loop */
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while (1)
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{
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/* Toggle LED */
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BSP_LED_Toggle(LED_GREEN);
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/* Insert the calculated delay above */
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HAL_Delay(delay);
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/* Refresh WWDG */
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if (HAL_WWDG_Refresh(&WwdgHandle) != HAL_OK)
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{
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APP_ErrorHandler();
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}
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}
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}
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/**
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* @brief Timeout Calculation.
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* @param timevalue：time
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* @retval int
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*/
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static uint32_t APP_TimeoutCalculation(uint32_t timevalue)
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{
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uint32_t timeoutvalue = 0;
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uint32_t pclk1 = 0;
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uint32_t wdgtb = 0;
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/* Get PCLK value */
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pclk1 = HAL_RCC_GetPCLK1Freq();
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/* Get prescaler */
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wdgtb = (1 << ((WwdgHandle.Init.Prescaler) >> 7)); /* 2^WDGTB[1:0] */
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/* Calculating timeout value */
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timeoutvalue = ((4096 * wdgtb * timevalue) / (pclk1 / 1000));
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return timeoutvalue;
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}
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/**
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* @brief Configure systemclock
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* @param None
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* @retval None
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*/
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static void APP_SystemClockConfig(void)
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{
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RCC_OscInitTypeDef OscInitstruct = {0};
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RCC_ClkInitTypeDef ClkInitstruct = {0};
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OscInitstruct.OscillatorType = RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_LSE |
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RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_HSI48M;
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OscInitstruct.HSEState = RCC_HSE_OFF; /* HSE OFF */
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/* OscInitstruct.HSEFreq = RCC_HSE_16_32MHz; */ /* HSE clock range 16~32MHz */
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OscInitstruct.HSI48MState = RCC_HSI48M_OFF; /* Disable HSI48M clock */
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OscInitstruct.HSIState = RCC_HSI_ON; /* HSI ON */
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OscInitstruct.LSEState = RCC_LSE_OFF; /* LSE OFF */
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/* OscInitstruct.LSEDriver = RCC_LSEDRIVE_HIGH; */ /* LSE high drive capability */
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OscInitstruct.LSIState = RCC_LSI_OFF; /* LSI OFF */
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OscInitstruct.PLL.PLLState = RCC_PLL_OFF; /* PLL OFF */
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/* OscInitstruct.PLL.PLLSource = RCC_PLLSOURCE_HSE; */ /* HSE oscillator clock selected as PLL clock entry */
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/* OscInitstruct.PLL.PLLMUL = RCC_PLL_MUL6; */ /* PLLVCO = PLL clock entry x 6 */
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/* Initialize the RCC Oscillators */
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if(HAL_RCC_OscConfig(&OscInitstruct) != HAL_OK)
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{
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APP_ErrorHandler();
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}
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ClkInitstruct.ClockType = RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
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ClkInitstruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI; /* Select HSI as system clock */
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ClkInitstruct.AHBCLKDivider = RCC_SYSCLK_DIV1; /* SYSCLK not divided: HCLK=SYSCLK */
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ClkInitstruct.APB1CLKDivider = RCC_HCLK_DIV1; /* HCLK not divided: PCLK1=HCLK */
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ClkInitstruct.APB2CLKDivider = RCC_HCLK_DIV2; /* HCLK divided by 2: PCLK2=HCLK/2 */
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/* Set clock source */
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if(HAL_RCC_ClockConfig(&ClkInitstruct, FLASH_LATENCY_0) != HAL_OK)
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{
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APP_ErrorHandler();
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}
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}
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/**
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* @brief Error handling function
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* @param None
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* @retval None
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*/
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void APP_ErrorHandler(void)
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{
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/* Infinite loop */
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while (1)
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{
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}
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}
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#ifdef USE_FULL_ASSERT
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/**
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* @brief Reports the name of the source file and the source line number
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* where the assert_param error has occurred.
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* @param file：Pointer to the source file name
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* @param line：assert_param error line source number
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* @retval None
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*/
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void assert_failed(uint8_t *file, uint32_t line)
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{
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/* User can add His own implementation to report the file name and line number,
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ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
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/* Infinite loop */
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while (1)
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{
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}
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}
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#endif /* USE_FULL_ASSERT */
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/************************ (C) COPYRIGHT Puya *****END OF FILE******************/
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