Extend watchdog coverage with IWDG, a watchdog running from an indepe…

…ndent LF oscillator. If any of the threads being monitored does not report for more than 12ms, a reset will be asserted. When a WDG reset happens, the user can see it in the fault logs from vesc tool

Signed-off-by: Marcos Chaparro <mchaparro@paltatech.com>

ChibiOS_3.0.2/ext/stdperiph_stm32f4/inc/stm32f4xx_iwdg.h

@@ -0,0 +1,131 @@
+/**
+  ******************************************************************************
+  * @file    stm32f4xx_iwdg.h
+  * @author  MCD Application Team
+  * @version V1.6.0
+  * @date    10-July-2015
+  * @brief   This file contains all the functions prototypes for the IWDG 
+  *          firmware library.
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT 2015 STMicroelectronics</center></h2>
+  *
+  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
+  * You may not use this file except in compliance with the License.
+  * You may obtain a copy of the License at:
+  *
+  *        http://www.st.com/software_license_agreement_liberty_v2
+  *
+  * Unless required by applicable law or agreed to in writing, software 
+  * distributed under the License is distributed on an "AS IS" BASIS, 
+  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  * See the License for the specific language governing permissions and
+  * limitations under the License.
+  *
+  ******************************************************************************
+  */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __STM32F4xx_IWDG_H
+#define __STM32F4xx_IWDG_H
+
+#ifdef __cplusplus
+ extern "C" {
+#endif
+
+/* Includes ------------------------------------------------------------------*/
+#include "stm32f4xx.h"
+
+/** @addtogroup STM32F4xx_StdPeriph_Driver
+  * @{
+  */
+
+/** @addtogroup IWDG
+  * @{
+  */
+
+/* Exported types ------------------------------------------------------------*/
+/* Exported constants --------------------------------------------------------*/
+
+/** @defgroup IWDG_Exported_Constants
+  * @{
+  */
+
+/** @defgroup IWDG_WriteAccess
+  * @{
+  */
+#define IWDG_WriteAccess_Enable     ((uint16_t)0x5555)
+#define IWDG_WriteAccess_Disable    ((uint16_t)0x0000)
+#define IS_IWDG_WRITE_ACCESS(ACCESS) (((ACCESS) == IWDG_WriteAccess_Enable) || \
+                                      ((ACCESS) == IWDG_WriteAccess_Disable))
+/**
+  * @}
+  */
+
+/** @defgroup IWDG_prescaler 
+  * @{
+  */
+#define IWDG_Prescaler_4            ((uint8_t)0x00)
+#define IWDG_Prescaler_8            ((uint8_t)0x01)
+#define IWDG_Prescaler_16           ((uint8_t)0x02)
+#define IWDG_Prescaler_32           ((uint8_t)0x03)
+#define IWDG_Prescaler_64           ((uint8_t)0x04)
+#define IWDG_Prescaler_128          ((uint8_t)0x05)
+#define IWDG_Prescaler_256          ((uint8_t)0x06)
+#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))
+/**
+  * @}
+  */
+
+/** @defgroup IWDG_Flag 
+  * @{
+  */
+#define IWDG_FLAG_PVU               ((uint16_t)0x0001)
+#define IWDG_FLAG_RVU               ((uint16_t)0x0002)
+#define IS_IWDG_FLAG(FLAG) (((FLAG) == IWDG_FLAG_PVU) || ((FLAG) == IWDG_FLAG_RVU))
+#define IS_IWDG_RELOAD(RELOAD) ((RELOAD) <= 0xFFF)
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/* Exported macro ------------------------------------------------------------*/
+/* Exported functions --------------------------------------------------------*/
+
+/* Prescaler and Counter configuration functions ******************************/
+void IWDG_WriteAccessCmd(uint16_t IWDG_WriteAccess);
+void IWDG_SetPrescaler(uint8_t IWDG_Prescaler);
+void IWDG_SetReload(uint16_t Reload);
+void IWDG_ReloadCounter(void);
+
+/* IWDG activation function ***************************************************/
+void IWDG_Enable(void);
+
+/* Flag management function ***************************************************/
+FlagStatus IWDG_GetFlagStatus(uint16_t IWDG_FLAG);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __STM32F4xx_IWDG_H */
+
+/**
+  * @}
+  */
+
+/**
+  * @}
+  */
+
+/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/