/**
******************************************************************************
* @file main.c
* @author MCU Application Team
* @brief Main program body
******************************************************************************
* @attention
*
* © Copyright (c) 2023 Puya Semiconductor Co.
* All rights reserved.
*
* 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
*
* © Copyright (c) 2016 STMicroelectronics.
* All rights reserved.
*
* 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 ------------------------------------------------------------*/
#define WINDOW_IN /* Refresh WWDG Within the window time*/
/* #define WINDOW_UPPER */ /* Refresh WWDG outside the window time upper limit */
/* #define WINDOW_LOWER */ /* Refresh WWDG outside the window time lower limit */
/* Private variables ---------------------------------------------------------*/
WWDG_HandleTypeDef WwdgHandle;
uint32_t delay;
/* Private user code ---------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
static void APP_SystemClockConfig(void);
static uint32_t APP_TimeoutCalculation(uint32_t timevalue);
/**
* @brief Main program
* @retval int
*/
int main(void)
{
/* Reset of all peripherals, Initializes the Systick */
HAL_Init();
/* Configure Systemclock */
APP_SystemClockConfig();
/* Initialize button */
BSP_PB_Init(BUTTON_KEY, BUTTON_MODE_GPIO);
/* Initialize LED */
BSP_LED_Init(LED_GREEN);
if (__HAL_RCC_GET_FLAG(RCC_FLAG_WWDGRST) != RESET)
{
/* LED ON */
BSP_LED_On(LED_GREEN);
/* Delay 4s */
HAL_Delay(4000);
/* LED off */
BSP_LED_Off(LED_GREEN);
/* Delay 500ms */
HAL_Delay(500);
/* Set RMVF bit to clear the reset flags */
__HAL_RCC_CLEAR_RESET_FLAGS();
}
else
{
/* LED off */
BSP_LED_Off(LED_GREEN);
}
/* Initialize WWDG */
WwdgHandle.Instance = WWDG; /* Select WWDG */
WwdgHandle.Init.Prescaler = WWDG_PRESCALER_8; /* WWDG counter clock = (PCLK1/4096)/8 */
WwdgHandle.Init.Window = 0x50; /* WWDG window value */
WwdgHandle.Init.Counter = 0x7F; /* WWDG free-running downcounter value(7 bit) */
WwdgHandle.Init.EWIMode = WWDG_EWI_DISABLE; /* EWI disable */
/* Initialize WWDG */
if (HAL_WWDG_Init(&WwdgHandle) != HAL_OK)
{
APP_ErrorHandler();
}
#if defined(WINDOW_IN)
delay = APP_TimeoutCalculation((WwdgHandle.Init.Counter - WwdgHandle.Init.Window) + 1) + 1; /* Within the window */
#elif defined(WINDOW_UPPER)
delay = APP_TimeoutCalculation((WwdgHandle.Init.Counter - WwdgHandle.Init.Window)-5 ) + 1; /* Outside the window time upper limit */
#else
delay = APP_TimeoutCalculation((WwdgHandle.Init.Counter - 0x3f) +5) + 1; /* outside the window time lower limit */
#endif
/* Infinite loop */
while (1)
{
/* Toggle LED */
BSP_LED_Toggle(LED_GREEN);
/* Insert the calculated delay above */
HAL_Delay(delay);
/* Refresh WWDG */
if (HAL_WWDG_Refresh(&WwdgHandle) != HAL_OK)
{
APP_ErrorHandler();
}
}
}
/**
* @brief Timeout Calculation.
* @param timevalue：time
* @retval int
*/
static uint32_t APP_TimeoutCalculation(uint32_t timevalue)
{
uint32_t timeoutvalue = 0;
uint32_t pclk1 = 0;
uint32_t wdgtb = 0;
/* Get PCLK value */
pclk1 = HAL_RCC_GetPCLK1Freq();
/* Get prescaler */
wdgtb = (1 << ((WwdgHandle.Init.Prescaler) >> 7)); /* 2^WDGTB[1:0] */
/* Calculating timeout value */
timeoutvalue = ((4096 * wdgtb * timevalue) / (pclk1 / 1000));
return timeoutvalue;
}
/**
* @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 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******************/