Reflect watchdog reset with startup color

firmware/AdaptiveBrightnessFirmware.ioc

@@ -6,19 +6,21 @@ GPIO.groupedBy=Group By Peripherals
 KeepUserPlacement=false
 Mcu.Family=STM32F0
 Mcu.IP0=ADC
-Mcu.IP1=NVIC
-Mcu.IP2=RCC
-Mcu.IP3=SYS
-Mcu.IP4=USB
-Mcu.IP5=USB_DEVICE
-Mcu.IPNb=6
+Mcu.IP1=IWDG
+Mcu.IP2=NVIC
+Mcu.IP3=RCC
+Mcu.IP4=SYS
+Mcu.IP5=USB
+Mcu.IP6=USB_DEVICE
+Mcu.IPNb=7
 Mcu.Name=STM32F042K(4-6)Tx
 Mcu.Package=LQFP32
 Mcu.Pin0=PA0
 Mcu.Pin1=PA1
 Mcu.Pin10=PB8
-Mcu.Pin11=VP_SYS_VS_Systick
-Mcu.Pin12=VP_USB_DEVICE_VS_USB_DEVICE_CDC_FS
+Mcu.Pin11=VP_IWDG_VS_IWDG
+Mcu.Pin12=VP_SYS_VS_Systick
+Mcu.Pin13=VP_USB_DEVICE_VS_USB_DEVICE_CDC_FS
 Mcu.Pin2=PA2
 Mcu.Pin3=PA7
 Mcu.Pin4=PB0
@@ -27,7 +29,7 @@ Mcu.Pin6=PA11
 Mcu.Pin7=PA12
 Mcu.Pin8=PA13
 Mcu.Pin9=PA14
-Mcu.PinsNb=13
+Mcu.PinsNb=14
 Mcu.ThirdPartyNb=0
 Mcu.UserConstants=
 Mcu.UserName=STM32F042K6Tx
@@ -87,13 +89,13 @@ ProjectManager.ComputerToolchain=false
 ProjectManager.CoupleFile=true
 ProjectManager.CustomerFirmwarePackage=
 ProjectManager.DefaultFWLocation=true
-ProjectManager.DeletePrevious=true
+ProjectManager.DeletePrevious=false
 ProjectManager.DeviceId=STM32F042K6Tx
 ProjectManager.FirmwarePackage=STM32Cube FW_F0 V1.11.0
 ProjectManager.FreePins=false
 ProjectManager.HalAssertFull=false
 ProjectManager.HeapSize=0x000
-ProjectManager.KeepUserCode=false
+ProjectManager.KeepUserCode=true
 ProjectManager.LastFirmware=true
 ProjectManager.LibraryCopy=1
 ProjectManager.MainLocation=Src
@@ -106,7 +108,7 @@ ProjectManager.StackSize=0x700
 ProjectManager.TargetToolchain=Makefile
 ProjectManager.ToolChainLocation=
 ProjectManager.UnderRoot=false
-ProjectManager.functionlistsort=1-MX_GPIO_Init-GPIO-false-HAL-true,2-SystemClock_Config-RCC-false-HAL-false,3-MX_ADC_Init-ADC-false-HAL-true,4-MX_USB_DEVICE_Init-USB_DEVICE-false-HAL-false
+ProjectManager.functionlistsort=1-MX_GPIO_Init-GPIO-false-HAL-true,2-SystemClock_Config-RCC-false-HAL-false,3-MX_ADC_Init-ADC-false-HAL-true,4-MX_USB_DEVICE_Init-USB_DEVICE-false-HAL-false,5-MX_IWDG_Init-IWDG-false-HAL-true
 RCC.AHBFreq_Value=48000000
 RCC.APB1Freq_Value=48000000
 RCC.APB1TimFreq_Value=48000000
@@ -132,6 +134,8 @@ USB_DEVICE.IPParameters=VirtualMode,VirtualModeFS,CLASS_NAME_FS,PRODUCT_STRING_C
 USB_DEVICE.PRODUCT_STRING_CDC_FS=AdaptiveBrightness
 USB_DEVICE.VirtualMode=Cdc
 USB_DEVICE.VirtualModeFS=Cdc_FS
+VP_IWDG_VS_IWDG.Mode=IWDG_Activate
+VP_IWDG_VS_IWDG.Signal=IWDG_VS_IWDG
 VP_SYS_VS_Systick.Mode=SysTick
 VP_SYS_VS_Systick.Signal=SYS_VS_Systick
 VP_USB_DEVICE_VS_USB_DEVICE_CDC_FS.Mode=CDC_FS

firmware/Drivers/STM32F0xx_HAL_Driver/Inc/stm32f0xx_hal_iwdg.h

@@ -0,0 +1,242 @@
+/**
+  ******************************************************************************
+  * @file    stm32f0xx_hal_iwdg.h
+  * @author  MCD Application Team
+  * @brief   Header file of IWDG HAL module.
+  ******************************************************************************
+  * @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
+  *
+  ******************************************************************************
+  */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef STM32F0xx_HAL_IWDG_H
+#define STM32F0xx_HAL_IWDG_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f0xx_hal_def.h"
+
+/** @addtogroup STM32F0xx_HAL_Driver
+  * @{
+  */
+
+/** @defgroup IWDG IWDG
+  * @{
+  */
+
+/* Exported types ------------------------------------------------------------*/
+/** @defgroup IWDG_Exported_Types IWDG Exported Types
+  * @{
+  */
+
+/**
+  * @brief  IWDG Init structure definition
+  */
+typedef struct
+{
+  uint32_t Prescaler;  /*!< Select the prescaler of the IWDG.
+                            This parameter can be a value of @ref IWDG_Prescaler */
+
+  uint32_t Reload;     /*!< Specifies the IWDG down-counter reload value.
+                            This parameter must be a number between Min_Data = 0 and Max_Data = 0x0FFF */
+
+  uint32_t Window;     /*!< Specifies the window value to be compared to the down-counter.
+                            This parameter must be a number between Min_Data = 0 and Max_Data = 0x0FFF */
+
+} IWDG_InitTypeDef;
+
+/**
+  * @brief  IWDG Handle Structure definition
+  */
+typedef struct
+{
+  IWDG_TypeDef                 *Instance;  /*!< Register base address    */
+
+  IWDG_InitTypeDef             Init;       /*!< IWDG required parameters */
+} IWDG_HandleTypeDef;
+
+
+/**
+  * @}
+  */
+
+/* Exported constants --------------------------------------------------------*/
+/** @defgroup IWDG_Exported_Constants IWDG Exported Constants
+  * @{
+  */
+
+/** @defgroup IWDG_Prescaler IWDG Prescaler
+  * @{
+  */
+#define IWDG_PRESCALER_4                0x00000000u                                     /*!< IWDG prescaler set to 4   */
+#define IWDG_PRESCALER_8                IWDG_PR_PR_0                                    /*!< IWDG prescaler set to 8   */
+#define IWDG_PRESCALER_16               IWDG_PR_PR_1                                    /*!< IWDG prescaler set to 16  */
+#define IWDG_PRESCALER_32               (IWDG_PR_PR_1 | IWDG_PR_PR_0)                   /*!< IWDG prescaler set to 32  */
+#define IWDG_PRESCALER_64               IWDG_PR_PR_2                                    /*!< IWDG prescaler set to 64  */
+#define IWDG_PRESCALER_128              (IWDG_PR_PR_2 | IWDG_PR_PR_0)                   /*!< IWDG prescaler set to 128 */
+#define IWDG_PRESCALER_256              (IWDG_PR_PR_2 | IWDG_PR_PR_1)                   /*!< IWDG prescaler set to 256 */
+
+/**
+  * @}
+  */
+
+/** @defgroup IWDG_Window_option IWDG Window option
+  * @{
+  */
+#define IWDG_WINDOW_DISABLE             IWDG_WINR_WIN
+/**
+  * @}
+  */
+
+
+/**
+  * @}
+  */
+
+/* Exported macros -----------------------------------------------------------*/
+/** @defgroup IWDG_Exported_Macros IWDG Exported Macros
+  * @{
+  */
+
+/**
+  * @brief  Enable the IWDG peripheral.
+  * @param  __HANDLE__  IWDG handle
+  * @retval None
+  */
+#define __HAL_IWDG_START(__HANDLE__)                WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_ENABLE)
+
+/**
+  * @brief  Reload IWDG counter with value defined in the reload register
+  *         (write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers disabled).
+  * @param  __HANDLE__  IWDG handle
+  * @retval None
+  */
+#define __HAL_IWDG_RELOAD_COUNTER(__HANDLE__)       WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_RELOAD)
+
+/**
+  * @}
+  */
+
+/* Exported functions --------------------------------------------------------*/
+/** @defgroup IWDG_Exported_Functions  IWDG Exported Functions
+  * @{
+  */
+
+/** @defgroup IWDG_Exported_Functions_Group1 Initialization and Start functions
+  * @{
+  */
+/* Initialization/Start functions  ********************************************/
+HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg);
+/**
+  * @}
+  */
+
+/** @defgroup IWDG_Exported_Functions_Group2 IO operation functions
+  * @{
+  */
+/* I/O operation functions ****************************************************/
+HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg);
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/* Private constants ---------------------------------------------------------*/
+/** @defgroup IWDG_Private_Constants IWDG Private Constants
+  * @{
+  */
+
+/**
+  * @brief  IWDG Key Register BitMask
+  */
+#define IWDG_KEY_RELOAD                 0x0000AAAAu  /*!< IWDG Reload Counter Enable   */
+#define IWDG_KEY_ENABLE                 0x0000CCCCu  /*!< IWDG Peripheral Enable       */
+#define IWDG_KEY_WRITE_ACCESS_ENABLE    0x00005555u  /*!< IWDG KR Write Access Enable  */
+#define IWDG_KEY_WRITE_ACCESS_DISABLE   0x00000000u  /*!< IWDG KR Write Access Disable */
+
+/**
+  * @}
+  */
+
+/* Private macros ------------------------------------------------------------*/
+/** @defgroup IWDG_Private_Macros IWDG Private Macros
+  * @{
+  */
+
+/**
+  * @brief  Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
+  * @param  __HANDLE__  IWDG handle
+  * @retval None
+  */
+#define IWDG_ENABLE_WRITE_ACCESS(__HANDLE__)  WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_WRITE_ACCESS_ENABLE)
+
+/**
+  * @brief  Disable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers.
+  * @param  __HANDLE__  IWDG handle
+  * @retval None
+  */
+#define IWDG_DISABLE_WRITE_ACCESS(__HANDLE__) WRITE_REG((__HANDLE__)->Instance->KR, IWDG_KEY_WRITE_ACCESS_DISABLE)
+
+/**
+  * @brief  Check IWDG prescaler value.
+  * @param  __PRESCALER__  IWDG prescaler value
+  * @retval None
+  */
+#define IS_IWDG_PRESCALER(__PRESCALER__)      (((__PRESCALER__) == IWDG_PRESCALER_4)  || \
+                                               ((__PRESCALER__) == IWDG_PRESCALER_8)  || \
+                                               ((__PRESCALER__) == IWDG_PRESCALER_16) || \
+                                               ((__PRESCALER__) == IWDG_PRESCALER_32) || \
+                                               ((__PRESCALER__) == IWDG_PRESCALER_64) || \
+                                               ((__PRESCALER__) == IWDG_PRESCALER_128)|| \
+                                               ((__PRESCALER__) == IWDG_PRESCALER_256))
+
+/**
+  * @brief  Check IWDG reload value.
+  * @param  __RELOAD__  IWDG reload value
+  * @retval None
+  */
+#define IS_IWDG_RELOAD(__RELOAD__)            ((__RELOAD__) <= IWDG_RLR_RL)
+
+/**
+  * @brief  Check IWDG window value.
+  * @param  __WINDOW__  IWDG window value
+  * @retval None
+  */
+#define IS_IWDG_WINDOW(__WINDOW__)            ((__WINDOW__) <= IWDG_WINR_WIN)
+
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* STM32F0xx_HAL_IWDG_H */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

firmware/Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_hal_iwdg.c

@@ -0,0 +1,264 @@
+/**
+  ******************************************************************************
+  * @file    stm32f0xx_hal_iwdg.c
+  * @author  MCD Application Team
+  * @brief   IWDG HAL module driver.
+  *          This file provides firmware functions to manage the following
+  *          functionalities of the Independent Watchdog (IWDG) peripheral:
+  *           + Initialization and Start functions
+  *           + IO operation functions
+  *
+  @verbatim
+  ==============================================================================
+                    ##### IWDG Generic features #####
+  ==============================================================================
+  [..]
+    (+) The IWDG can be started by either software or hardware (configurable
+        through option byte).
+
+    (+) The IWDG is clocked by Low-Speed clock (LSI) and thus stays active even
+        if the main clock fails.
+
+    (+) Once the IWDG is started, the LSI is forced ON and both can not be
+        disabled. The counter starts counting down from the reset value (0xFFF).
+        When it reaches the end of count value (0x000) a reset signal is
+        generated (IWDG reset).
+
+    (+) Whenever the key value 0x0000 AAAA is written in the IWDG_KR register,
+        the IWDG_RLR value is reloaded in the counter and the watchdog reset is
+        prevented.
+
+    (+) The IWDG is implemented in the VDD voltage domain that is still functional
+        in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
+        IWDGRST flag in RCC_CSR register can be used to inform when an IWDG
+        reset occurs.
+
+    (+) Debug mode : When the microcontroller enters debug mode (core halted),
+        the IWDG counter either continues to work normally or stops, depending
+        on DBG_IWDG_STOP configuration bit in DBG module, accessible through
+        __HAL_DBGMCU_FREEZE_IWDG() and __HAL_DBGMCU_UNFREEZE_IWDG() macros.
+
+    [..] Min-max timeout value @32KHz (LSI): ~125us / ~32.7s
+         The IWDG timeout may vary due to LSI frequency dispersion. STM32F0xx
+         devices provide the capability to measure the LSI frequency (LSI clock
+         connected internally to TIM16 CH1 input capture). The measured value
+         can be used to have an IWDG timeout with an acceptable accuracy.
+
+                     ##### How to use this driver #####
+  ==============================================================================
+  [..]
+    (#) Use IWDG using HAL_IWDG_Init() function to :
+      (++) Enable instance by writing Start keyword in IWDG_KEY register. LSI
+           clock is forced ON and IWDG counter starts counting down.
+      (++) Enable write access to configuration registers:
+          IWDG_PR, IWDG_RLR and IWDG_WINR.
+      (++) Configure the IWDG prescaler and counter reload value. This reload
+           value will be loaded in the IWDG counter each time the watchdog is
+           reloaded, then the IWDG will start counting down from this value.
+      (++) Wait for status flags to be reset.
+      (++) Depending on window parameter:
+        (+++) If Window Init parameter is same as Window register value,
+             nothing more is done but reload counter value in order to exit
+             function with exact time base.
+        (+++) Else modify Window register. This will automatically reload
+             watchdog counter.
+
+    (#) Then the application program must refresh the IWDG counter at regular
+        intervals during normal operation to prevent an MCU reset, using
+        HAL_IWDG_Refresh() function.
+
+     *** IWDG HAL driver macros list ***
+     ====================================
+     [..]
+       Below the list of most used macros in IWDG HAL driver:
+      (+) __HAL_IWDG_START: Enable the IWDG peripheral
+      (+) __HAL_IWDG_RELOAD_COUNTER: Reloads IWDG counter with value defined in
+          the reload register
+
+  @endverbatim
+  ******************************************************************************
+  * @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 "stm32f0xx_hal.h"
+
+/** @addtogroup STM32F0xx_HAL_Driver
+  * @{
+  */
+
+#ifdef HAL_IWDG_MODULE_ENABLED
+/** @addtogroup IWDG
+  * @brief IWDG HAL module driver.
+  * @{
+  */
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/** @defgroup IWDG_Private_Defines IWDG Private Defines
+  * @{
+  */
+/* Status register need 5 RC LSI divided by prescaler clock to be updated. With
+   higher prescaler (256), and according to LSI variation, we need to wait at
+   least 6 cycles so 48 ms. */
+#define HAL_IWDG_DEFAULT_TIMEOUT            48u
+/**
+  * @}
+  */
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+/** @addtogroup IWDG_Exported_Functions
+  * @{
+  */
+
+/** @addtogroup IWDG_Exported_Functions_Group1
+  *  @brief    Initialization and Start functions.
+  *
+@verbatim
+ ===============================================================================
+          ##### Initialization and Start functions #####
+ ===============================================================================
+ [..]  This section provides functions allowing to:
+      (+) Initialize the IWDG according to the specified parameters in the
+          IWDG_InitTypeDef of associated handle.
+      (+) Manage Window option.
+      (+) Once initialization is performed in HAL_IWDG_Init function, Watchdog
+          is reloaded in order to exit function with correct time base.
+
+@endverbatim
+  * @{
+  */
+
+/**
+  * @brief  Initialize the IWDG according to the specified parameters in the
+  *         IWDG_InitTypeDef and start watchdog. Before exiting function,
+  *         watchdog is refreshed in order to have correct time base.
+  * @param  hiwdg  pointer to a IWDG_HandleTypeDef structure that contains
+  *                the configuration information for the specified IWDG module.
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_IWDG_Init(IWDG_HandleTypeDef *hiwdg)
+{
+  uint32_t tickstart;
+
+  /* Check the IWDG handle allocation */
+  if (hiwdg == NULL)
+  {
+    return HAL_ERROR;
+  }
+
+  /* Check the parameters */
+  assert_param(IS_IWDG_ALL_INSTANCE(hiwdg->Instance));
+  assert_param(IS_IWDG_PRESCALER(hiwdg->Init.Prescaler));
+  assert_param(IS_IWDG_RELOAD(hiwdg->Init.Reload));
+  assert_param(IS_IWDG_WINDOW(hiwdg->Init.Window));
+
+  /* Enable IWDG. LSI is turned on automatically */
+  __HAL_IWDG_START(hiwdg);
+
+  /* Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers by writing
+  0x5555 in KR */
+  IWDG_ENABLE_WRITE_ACCESS(hiwdg);
+
+  /* Write to IWDG registers the Prescaler & Reload values to work with */
+  hiwdg->Instance->PR = hiwdg->Init.Prescaler;
+  hiwdg->Instance->RLR = hiwdg->Init.Reload;
+
+  /* Check pending flag, if previous update not done, return timeout */
+  tickstart = HAL_GetTick();
+
+  /* Wait for register to be updated */
+  while (hiwdg->Instance->SR != 0x00u)
+  {
+    if ((HAL_GetTick() - tickstart) > HAL_IWDG_DEFAULT_TIMEOUT)
+    {
+      return HAL_TIMEOUT;
+    }
+  }
+
+  /* If window parameter is different than current value, modify window
+  register */
+  if (hiwdg->Instance->WINR != hiwdg->Init.Window)
+  {
+    /* Write to IWDG WINR the IWDG_Window value to compare with. In any case,
+    even if window feature is disabled, Watchdog will be reloaded by writing
+    windows register */
+    hiwdg->Instance->WINR = hiwdg->Init.Window;
+  }
+  else
+  {
+    /* Reload IWDG counter with value defined in the reload register */
+    __HAL_IWDG_RELOAD_COUNTER(hiwdg);
+  }
+
+  /* Return function status */
+  return HAL_OK;
+}
+
+/**
+  * @}
+  */
+
+
+/** @addtogroup IWDG_Exported_Functions_Group2
+  *  @brief   IO operation functions
+  *
+@verbatim
+ ===============================================================================
+                      ##### IO operation functions #####
+ ===============================================================================
+ [..]  This section provides functions allowing to:
+      (+) Refresh the IWDG.
+
+@endverbatim
+  * @{
+  */
+
+
+/**
+  * @brief  Refresh the IWDG.
+  * @param  hiwdg  pointer to a IWDG_HandleTypeDef structure that contains
+  *                the configuration information for the specified IWDG module.
+  * @retval HAL status
+  */
+HAL_StatusTypeDef HAL_IWDG_Refresh(IWDG_HandleTypeDef *hiwdg)
+{
+  /* Reload IWDG counter with value defined in the reload register */
+  __HAL_IWDG_RELOAD_COUNTER(hiwdg);
+
+  /* Return function status */
+  return HAL_OK;
+}
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+#endif /* HAL_IWDG_MODULE_ENABLED */
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

firmware/Inc/iwdg.h

@@ -0,0 +1,58 @@
+/**
+  ******************************************************************************
+  * File Name          : IWDG.h
+  * Description        : This file provides code for the configuration
+  *                      of the IWDG instances.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under Ultimate Liberty license
+  * SLA0044, the "License"; You may not use this file except in compliance with
+  * the License. You may obtain a copy of the License at:
+  *                             www.st.com/SLA0044
+  *
+  ******************************************************************************
+  */
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __iwdg_H
+#define __iwdg_H
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "init.h"
+
+/* USER CODE BEGIN Includes */
+
+/* USER CODE END Includes */
+
+extern IWDG_HandleTypeDef hiwdg;
+
+/* USER CODE BEGIN Private defines */
+
+/* USER CODE END Private defines */
+
+void MX_IWDG_Init(void);
+
+/* USER CODE BEGIN Prototypes */
+
+/* USER CODE END Prototypes */
+
+#ifdef __cplusplus
+}
+#endif
+#endif /*__ iwdg_H */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

firmware/Inc/stm32f0xx_hal_conf.h

@@ -42,7 +42,7 @@
 /*#define HAL_TSC_MODULE_ENABLED   */
 /*#define HAL_DAC_MODULE_ENABLED   */
 /*#define HAL_I2S_MODULE_ENABLED   */
-/*#define HAL_IWDG_MODULE_ENABLED   */
+#define HAL_IWDG_MODULE_ENABLED
 /*#define HAL_LCD_MODULE_ENABLED   */
 /*#define HAL_LPTIM_MODULE_ENABLED   */
 /*#define HAL_RNG_MODULE_ENABLED   */

firmware/Makefile

@@ -1,5 +1,5 @@
 ##########################################################################################################################
-# File automatically-generated by tool: [projectgenerator] version: [3.7.1] date: [Sun Jun 28 13:32:11 CEST 2020]
+# File automatically-generated by tool: [projectgenerator] version: [3.7.1] date: [Thu Jul 09 19:18:35 CEST 2020]
 # and modified by hand
 ##########################################################################################################################
 
@@ -38,6 +38,7 @@ BUILD_DIR = build
 # C sources
 C_SOURCES =  \
 Src/init.c \
+Src/iwdg.c \
 Src/gpio.c \
 Src/adc.c \
 Src/usb_device.c \
@@ -65,6 +66,7 @@ Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_hal_adc.c \
 Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_hal_adc_ex.c \
 Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_hal_tim.c \
 Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_hal_tim_ex.c \
+Drivers/STM32F0xx_HAL_Driver/Src/stm32f0xx_hal_iwdg.c \
 Src/system_stm32f0xx.c \
 Middlewares/ST/STM32_USB_Device_Library/Core/Src/usbd_core.c \
 Middlewares/ST/STM32_USB_Device_Library/Core/Src/usbd_ctlreq.c \
@@ -147,7 +149,6 @@ C_INCLUDES =  \
 -IMiddlewares/ST/STM32_USB_Device_Library/Core/Inc \
 -IMiddlewares/ST/STM32_USB_Device_Library/Class/CDC/Inc \
 -IDrivers/CMSIS/Device/ST/STM32F0xx/Include \
--IDrivers/CMSIS/Include \
 -IDrivers/CMSIS/Include
 
 # C++ includes
@@ -158,7 +159,6 @@ CXX_INCLUDES =  \
 -IMiddlewares/ST/STM32_USB_Device_Library/Core/Inc \
 -IMiddlewares/ST/STM32_USB_Device_Library/Class/CDC/Inc \
 -IDrivers/CMSIS/Device/ST/STM32F0xx/Include \
--IDrivers/CMSIS/Include \
 -IDrivers/CMSIS/Include
 
 

firmware/Src/init.c

@@ -107,10 +107,12 @@ void SystemClock_Config(void)
 
   /** Initializes the CPU, AHB and APB busses clocks
   */
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI14|RCC_OSCILLATORTYPE_HSI48;
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI14|RCC_OSCILLATORTYPE_HSI48
+                              |RCC_OSCILLATORTYPE_LSI;
   RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
   RCC_OscInitStruct.HSI14State = RCC_HSI14_ON;
   RCC_OscInitStruct.HSI14CalibrationValue = 16;
+  RCC_OscInitStruct.LSIState = RCC_LSI_ON;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
   if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
   {

firmware/Src/iwdg.c

@@ -0,0 +1,48 @@
+/**
+  ******************************************************************************
+  * File Name          : IWDG.c
+  * Description        : This file provides code for the configuration
+  *                      of the IWDG instances.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; Copyright (c) 2020 STMicroelectronics.
+  * All rights reserved.</center></h2>
+  *
+  * This software component is licensed by ST under Ultimate Liberty license
+  * SLA0044, the "License"; You may not use this file except in compliance with
+  * the License. You may obtain a copy of the License at:
+  *                             www.st.com/SLA0044
+  *
+  ******************************************************************************
+  */
+
+/* Includes ------------------------------------------------------------------*/
+#include "iwdg.h"
+
+/* USER CODE BEGIN 0 */
+
+/* USER CODE END 0 */
+
+IWDG_HandleTypeDef hiwdg;
+
+/* IWDG init function */
+void MX_IWDG_Init(void)
+{
+
+  hiwdg.Instance = IWDG;
+  hiwdg.Init.Prescaler = IWDG_PRESCALER_16;
+  hiwdg.Init.Window = 4095;
+  hiwdg.Init.Reload = 4095;
+  if (HAL_IWDG_Init(&hiwdg) != HAL_OK)
+  {
+    Error_Handler();
+  }
+
+}
+
+/* USER CODE BEGIN 1 */
+
+/* USER CODE END 1 */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/

firmware/Src/main.cpp

@@ -1,4 +1,5 @@
 #include "init.h"
+#include "iwdg.h"
 #include "terminal.hpp"
 #include "uart.hpp"
 
@@ -14,6 +15,8 @@ extern "C" void Error_Handler(void)
 
 static inline void initializeHardware()
 {
+    const auto resetByWatchdog = (__HAL_RCC_GET_FLAG(RCC_FLAG_IWDGRST)) ? true : false;
+
     terminal_t terminal;
 
     do {
@@ -23,8 +26,13 @@ static inline void initializeHardware()
         HAL_GPIO_WritePin(RED_LED_GPIO_Port, RED_LED_Pin, g_error ? GPIO_PIN_RESET : GPIO_PIN_SET);
     } while(g_error);
 
+    if(resetByWatchdog) {
+        HAL_GPIO_WritePin(GREEN_LED_GPIO_Port, GREEN_LED_Pin, GPIO_PIN_SET);
+    }
+    else {
+        HAL_GPIO_WritePin(GREEN_LED_GPIO_Port, GREEN_LED_Pin, GPIO_PIN_RESET);
+    }
     HAL_GPIO_WritePin(RED_LED_GPIO_Port, RED_LED_Pin, GPIO_PIN_RESET);
-    HAL_GPIO_WritePin(GREEN_LED_GPIO_Port, GREEN_LED_Pin, GPIO_PIN_RESET);
     HAL_GPIO_WritePin(BLUE_LED_GPIO_Port, BLUE_LED_Pin, GPIO_PIN_RESET);
 
     HAL_Delay(1000);
@@ -37,11 +45,13 @@ static inline void initializeHardware()
 int main()
 {
     initializeHardware();
+    MX_IWDG_Init();
 
     terminal_t terminal;
 
     while(true) {
         terminal.callback();
+        HAL_IWDG_Refresh(&hiwdg);
     }
 
     return 0;