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STM32CubeWL/Projects/NUCLEO-WL55JC/Examples/IWDG/IWDG_Reset/Src/main.c

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/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file IWDG/IWDG_Reset/Src/main.c
* @author MCD Application Team
* @brief This sample code shows how to use the IWDG HAL API
* to update at regular period the IWDG counter and how to simulate
* a software fault generating an MCU IWDG reset on expiry of a
* programmed time period.
******************************************************************************
* @attention
*
* Copyright (c) 2020 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#define IWDG_WINDOW IWDG_WINDOW_DISABLE
#define IWDG_RELOAD (uwLsiFreq / 32)
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
IWDG_HandleTypeDef hiwdg;
/* USER CODE BEGIN PV */
uint32_t IwdgStatus = 0;
TIM_HandleTypeDef htim17;
uint16_t tmpCC4[2];
uint32_t uwLsiFreq;
__IO uint32_t uwCaptureNumber = 0;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_IWDG_Init(void);
/* USER CODE BEGIN PFP */
static void GetLSIFrequency(void);
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim);
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* Configure LED2, LED1, LED3 */
BSP_LED_Init(LED2);
BSP_LED_Init(LED1);
BSP_LED_Init(LED3);
/*##-1- Check if the system has resumed from IWDG reset ####################*/
if (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST) != 0x00u)
{
/* IWDGRST flag set: Turn LED2 on and set IwdgStatus */
IwdgStatus = 1;
BSP_LED_On(LED2);
/* Insert 4s delay */
HAL_Delay(4000);
/* Notification done: Turn LED2 off */
BSP_LED_Off(LED2);
}
/* Clear reset flags in any cases */
__HAL_RCC_CLEAR_RESET_FLAGS();
IwdgStatus = 0;
/*##-2- Get the LSI frequency: TIM17 is used to measure the LSI frequency ###*/
GetLSIFrequency();
/*##-3- Configure & Start the IWDG peripheral #########################################*/
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_IWDG_Init();
/* USER CODE BEGIN 2 */
/* Configure User push-button (B1) */
BSP_PB_Init(BUTTON_SW1, BUTTON_MODE_EXTI);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
/* Toggle LED1 */
BSP_LED_Toggle(LED1);
/* Insert 990 ms delay */
HAL_Delay(990);
/* Refresh IWDG: reload counter */
if(HAL_IWDG_Refresh(&hiwdg) != HAL_OK)
{
/* Refresh Error */
Error_Handler();
}
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI|RCC_OSCILLATORTYPE_MSI;
RCC_OscInitStruct.MSIState = RCC_MSI_ON;
RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_11;
RCC_OscInitStruct.LSIDiv = RCC_LSI_DIV1;
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Configure the SYSCLKSource, HCLK, PCLK1 and PCLK2 clocks dividers
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK3|RCC_CLOCKTYPE_HCLK
|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1
|RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.AHBCLK3Divider = RCC_SYSCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief IWDG Initialization Function
* @param None
* @retval None
*/
static void MX_IWDG_Init(void)
{
/* USER CODE BEGIN IWDG_Init 0 */
/* USER CODE END IWDG_Init 0 */
/* USER CODE BEGIN IWDG_Init 1 */
/* USER CODE END IWDG_Init 1 */
hiwdg.Instance = IWDG;
hiwdg.Init.Prescaler = IWDG_PRESCALER_32;
hiwdg.Init.Window = IWDG_WINDOW;
hiwdg.Init.Reload = IWDG_RELOAD;
if (HAL_IWDG_Init(&hiwdg) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN IWDG_Init 2 */
/* USER CODE END IWDG_Init 2 */
}
/* USER CODE BEGIN 4 */
/**
* @brief Configures IWDG to measure the LSI oscillator frequency.
* @param None
* @retval LSI Frequency
*/
static void GetLSIFrequency(void)
{
TIM_IC_InitTypeDef TIMInput_Config;
/* Configure the TIM peripheral *********************************************/
/* Set TIMx instance */
htim17.Instance = TIM17;
/* TIM17 configuration: Input Capture mode ---------------------
The LSI oscillator is connected to TIM17 CH1.
The Rising edge is used as active edge.
The TIM17 CCR1 is used to compute the frequency value.
------------------------------------------------------------ */
htim17.Init.Prescaler = 0;
htim17.Init.CounterMode = TIM_COUNTERMODE_UP;
htim17.Init.Period = 0xFFFF;
htim17.Init.ClockDivision = 0;
if(HAL_TIM_IC_Init(&htim17) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Connect internally the IWDG_CH1 Input Capture to the LSI clock output */
HAL_TIMEx_RemapConfig(&htim17, TIM_TIM17_TI1_MCO );
/* Connect internally the MCO to LSI */
HAL_RCC_MCOConfig(RCC_MCO, RCC_MCO1SOURCE_LSI, RCC_MCODIV_1);
/* Configure the Input Capture of channel 1 */
TIMInput_Config.ICPolarity = TIM_ICPOLARITY_RISING;
TIMInput_Config.ICSelection = TIM_ICSELECTION_DIRECTTI;
TIMInput_Config.ICPrescaler = TIM_ICPSC_DIV8;
TIMInput_Config.ICFilter = 0;
if(HAL_TIM_IC_ConfigChannel(&htim17, &TIMInput_Config,TIM_CHANNEL_1) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
/* Start the TIM Input Capture measurement in interrupt mode */
if(HAL_TIM_IC_Start_IT(&htim17, TIM_CHANNEL_1) != HAL_OK)
{
Error_Handler();
}
/* Wait until the IWDG get 2 LSI edges */
while(uwCaptureNumber != 2)
{
}
/* Disable IWDG CC1 Interrupt Request */
HAL_TIM_IC_Stop_IT(&htim17, TIM_CHANNEL_1);
/* Deinitialize the IWDG peripheral registers to their default reset values */
HAL_TIM_IC_DeInit(&htim17);
}
/**
* @brief Input Capture callback in non blocking mode
* @param htim : TIM IC handle
* @retval None
*/
void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim)
{
uint32_t lsiperiod = 0;
/* Get the Input Capture value */
tmpCC4[uwCaptureNumber++] = HAL_TIM_ReadCapturedValue(&htim17, TIM_CHANNEL_1);
if (uwCaptureNumber >= 2)
{
/* Compute the period length */
lsiperiod = (uint16_t)(0xFFFF - tmpCC4[0] + tmpCC4[1] + 1);
/* Frequency computation */
uwLsiFreq = (uint32_t) SystemCoreClock / lsiperiod;
uwLsiFreq *= 8;
}
}
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* Turn LED3 on */
BSP_LED_On(LED3);
IwdgStatus = 1;
/* Infinite loop */
while(1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#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 CODE BEGIN 6 */
/* 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) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
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