|
|
/**
|
|
|
******************************************************************************
|
|
|
* @file stm32f4xx_hal_wwdg.c
|
|
|
* @author MCD Application Team
|
|
|
* @version V1.2.0
|
|
|
* @date 26-December-2014
|
|
|
* @brief WWDG HAL module driver.
|
|
|
* This file provides firmware functions to manage the following
|
|
|
* functionalities of the Window Watchdog (WWDG) peripheral:
|
|
|
* + Initialization and de-initialization functions
|
|
|
* + IO operation functions
|
|
|
* + Peripheral State functions
|
|
|
@verbatim
|
|
|
==============================================================================
|
|
|
##### WWDG specific features #####
|
|
|
==============================================================================
|
|
|
[..]
|
|
|
Once enabled the WWDG generates a system reset on expiry of a programmed
|
|
|
time period, unless the program refreshes the counter (downcounter)
|
|
|
before reaching 0x3F value (i.e. a reset is generated when the counter
|
|
|
value rolls over from 0x40 to 0x3F).
|
|
|
|
|
|
(+) An MCU reset is also generated if the counter value is refreshed
|
|
|
before the counter has reached the refresh window value. This
|
|
|
implies that the counter must be refreshed in a limited window.
|
|
|
(+) Once enabled the WWDG cannot be disabled except by a system reset.
|
|
|
(+) WWDGRST flag in RCC_CSR register can be used to inform when a WWDG
|
|
|
reset occurs.
|
|
|
(+) The WWDG counter input clock is derived from the APB clock divided
|
|
|
by a programmable prescaler.
|
|
|
(+) WWDG clock (Hz) = PCLK1 / (4096 * Prescaler)
|
|
|
(+) WWDG timeout (mS) = 1000 * Counter / WWDG clock
|
|
|
(+) WWDG Counter refresh is allowed between the following limits :
|
|
|
(++) min time (mS) = 1000 * (Counter – Window) / WWDG clock
|
|
|
(++) max time (mS) = 1000 * (Counter – 0x40) / WWDG clock
|
|
|
|
|
|
(+) Min-max timeout value at 50 MHz(PCLK1): 81.9 us / 41.9 ms
|
|
|
|
|
|
|
|
|
##### How to use this driver #####
|
|
|
==============================================================================
|
|
|
[..]
|
|
|
(+) Enable WWDG APB1 clock using __HAL_RCC_WWDG_CLK_ENABLE().
|
|
|
(+) Set the WWDG prescaler, refresh window and counter value
|
|
|
using HAL_WWDG_Init() function.
|
|
|
(+) Start the WWDG using HAL_WWDG_Start() function.
|
|
|
When the WWDG is enabled the counter value should be configured to
|
|
|
a value greater than 0x40 to prevent generating an immediate reset.
|
|
|
(+) Optionally you can enable the Early Wakeup Interrupt (EWI) which is
|
|
|
generated when the counter reaches 0x40, and then start the WWDG using
|
|
|
HAL_WWDG_Start_IT(). At EWI HAL_WWDG_WakeupCallback is executed and user can
|
|
|
add his own code by customization of function pointer HAL_WWDG_WakeupCallback
|
|
|
Once enabled, EWI interrupt cannot be disabled except by a system reset.
|
|
|
(+) Then the application program must refresh the WWDG counter at regular
|
|
|
intervals during normal operation to prevent an MCU reset, using
|
|
|
HAL_WWDG_Refresh() function. This operation must occur only when
|
|
|
the counter is lower than the refresh window value already programmed.
|
|
|
|
|
|
*** WWDG HAL driver macros list ***
|
|
|
==================================
|
|
|
[..]
|
|
|
Below the list of most used macros in WWDG HAL driver.
|
|
|
|
|
|
(+) __HAL_WWDG_ENABLE: Enable the WWDG peripheral
|
|
|
(+) __HAL_WWDG_GET_FLAG: Get the selected WWDG's flag status
|
|
|
(+) __HAL_WWDG_CLEAR_FLAG: Clear the WWDG's pending flags
|
|
|
(+) __HAL_WWDG_ENABLE_IT: Enables the WWDG early wake-up interrupt
|
|
|
|
|
|
@endverbatim
|
|
|
******************************************************************************
|
|
|
* @attention
|
|
|
*
|
|
|
* <h2><center>© COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
|
|
|
*
|
|
|
* Redistribution and use in source and binary forms, with or without modification,
|
|
|
* are permitted provided that the following conditions are met:
|
|
|
* 1. Redistributions of source code must retain the above copyright notice,
|
|
|
* this list of conditions and the following disclaimer.
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
|
* and/or other materials provided with the distribution.
|
|
|
* 3. Neither the name of STMicroelectronics nor the names of its contributors
|
|
|
* may be used to endorse or promote products derived from this software
|
|
|
* without specific prior written permission.
|
|
|
*
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
*
|
|
|
******************************************************************************
|
|
|
*/
|
|
|
|
|
|
/* Includes ------------------------------------------------------------------*/
|
|
|
#include "stm32f4xx_hal.h"
|
|
|
|
|
|
/** @addtogroup STM32F4xx_HAL_Driver
|
|
|
* @{
|
|
|
*/
|
|
|
|
|
|
/** @defgroup WWDG WWDG
|
|
|
* @brief WWDG HAL module driver.
|
|
|
* @{
|
|
|
*/
|
|
|
|
|
|
#ifdef HAL_WWDG_MODULE_ENABLED
|
|
|
|
|
|
/* Private typedef -----------------------------------------------------------*/
|
|
|
/* Private define ------------------------------------------------------------*/
|
|
|
/* Private macro -------------------------------------------------------------*/
|
|
|
/* Private variables ---------------------------------------------------------*/
|
|
|
/* Private function prototypes -----------------------------------------------*/
|
|
|
/* Exported functions --------------------------------------------------------*/
|
|
|
/** @defgroup WWDG_Exported_Functions WWDG Exported Functions
|
|
|
* @{
|
|
|
*/
|
|
|
|
|
|
/** @defgroup WWDG_Exported_Functions_Group1 Initialization and de-initialization functions
|
|
|
* @brief Initialization and Configuration functions.
|
|
|
*
|
|
|
@verbatim
|
|
|
==============================================================================
|
|
|
##### Initialization and de-initialization functions #####
|
|
|
==============================================================================
|
|
|
[..]
|
|
|
This section provides functions allowing to:
|
|
|
(+) Initialize the WWDG according to the specified parameters
|
|
|
in the WWDG_InitTypeDef and create the associated handle
|
|
|
(+) DeInitialize the WWDG peripheral
|
|
|
(+) Initialize the WWDG MSP
|
|
|
(+) DeInitialize the WWDG MSP
|
|
|
|
|
|
@endverbatim
|
|
|
* @{
|
|
|
*/
|
|
|
|
|
|
/**
|
|
|
* @brief Initializes the WWDG according to the specified
|
|
|
* parameters in the WWDG_InitTypeDef and creates the associated handle.
|
|
|
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
|
|
|
* the configuration information for the specified WWDG module.
|
|
|
* @retval HAL status
|
|
|
*/
|
|
|
HAL_StatusTypeDef HAL_WWDG_Init(WWDG_HandleTypeDef *hwwdg)
|
|
|
{
|
|
|
/* Check the WWDG handle allocation */
|
|
|
if(hwwdg == NULL)
|
|
|
{
|
|
|
return HAL_ERROR;
|
|
|
}
|
|
|
|
|
|
/* Check the parameters */
|
|
|
assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
|
|
|
assert_param(IS_WWDG_PRESCALER(hwwdg->Init.Prescaler));
|
|
|
assert_param(IS_WWDG_WINDOW(hwwdg->Init.Window));
|
|
|
assert_param(IS_WWDG_COUNTER(hwwdg->Init.Counter));
|
|
|
|
|
|
if(hwwdg->State == HAL_WWDG_STATE_RESET)
|
|
|
{
|
|
|
/* Init the low level hardware */
|
|
|
HAL_WWDG_MspInit(hwwdg);
|
|
|
}
|
|
|
|
|
|
/* Change WWDG peripheral state */
|
|
|
hwwdg->State = HAL_WWDG_STATE_BUSY;
|
|
|
|
|
|
/* Set WWDG Prescaler and Window */
|
|
|
MODIFY_REG(hwwdg->Instance->CFR, (WWDG_CFR_WDGTB | WWDG_CFR_W), (hwwdg->Init.Prescaler | hwwdg->Init.Window));
|
|
|
/* Set WWDG Counter */
|
|
|
MODIFY_REG(hwwdg->Instance->CR, WWDG_CR_T, hwwdg->Init.Counter);
|
|
|
|
|
|
/* Change WWDG peripheral state */
|
|
|
hwwdg->State = HAL_WWDG_STATE_READY;
|
|
|
|
|
|
/* Return function status */
|
|
|
return HAL_OK;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @brief DeInitializes the WWDG peripheral.
|
|
|
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
|
|
|
* the configuration information for the specified WWDG module.
|
|
|
* @retval HAL status
|
|
|
*/
|
|
|
HAL_StatusTypeDef HAL_WWDG_DeInit(WWDG_HandleTypeDef *hwwdg)
|
|
|
{
|
|
|
/* Check the WWDG handle allocation */
|
|
|
if(hwwdg == NULL)
|
|
|
{
|
|
|
return HAL_ERROR;
|
|
|
}
|
|
|
|
|
|
/* Check the parameters */
|
|
|
assert_param(IS_WWDG_ALL_INSTANCE(hwwdg->Instance));
|
|
|
|
|
|
/* Change WWDG peripheral state */
|
|
|
hwwdg->State = HAL_WWDG_STATE_BUSY;
|
|
|
|
|
|
/* DeInit the low level hardware */
|
|
|
HAL_WWDG_MspDeInit(hwwdg);
|
|
|
|
|
|
/* Reset WWDG Control register */
|
|
|
hwwdg->Instance->CR = (uint32_t)0x0000007F;
|
|
|
|
|
|
/* Reset WWDG Configuration register */
|
|
|
hwwdg->Instance->CFR = (uint32_t)0x0000007F;
|
|
|
|
|
|
/* Reset WWDG Status register */
|
|
|
hwwdg->Instance->SR = 0;
|
|
|
|
|
|
/* Change WWDG peripheral state */
|
|
|
hwwdg->State = HAL_WWDG_STATE_RESET;
|
|
|
|
|
|
/* Release Lock */
|
|
|
__HAL_UNLOCK(hwwdg);
|
|
|
|
|
|
/* Return function status */
|
|
|
return HAL_OK;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @brief Initializes the WWDG MSP.
|
|
|
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
|
|
|
* the configuration information for the specified WWDG module.
|
|
|
* @retval None
|
|
|
*/
|
|
|
__weak void HAL_WWDG_MspInit(WWDG_HandleTypeDef *hwwdg)
|
|
|
{
|
|
|
/* NOTE: This function Should not be modified, when the callback is needed,
|
|
|
the HAL_WWDG_MspInit could be implemented in the user file
|
|
|
*/
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @brief DeInitializes the WWDG MSP.
|
|
|
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
|
|
|
* the configuration information for the specified WWDG module.
|
|
|
* @retval None
|
|
|
*/
|
|
|
__weak void HAL_WWDG_MspDeInit(WWDG_HandleTypeDef *hwwdg)
|
|
|
{
|
|
|
/* NOTE: This function Should not be modified, when the callback is needed,
|
|
|
the HAL_WWDG_MspDeInit could be implemented in the user file
|
|
|
*/
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @}
|
|
|
*/
|
|
|
|
|
|
/** @defgroup WWDG_Exported_Functions_Group2 IO operation functions
|
|
|
* @brief IO operation functions
|
|
|
*
|
|
|
@verbatim
|
|
|
==============================================================================
|
|
|
##### IO operation functions #####
|
|
|
==============================================================================
|
|
|
[..]
|
|
|
This section provides functions allowing to:
|
|
|
(+) Start the WWDG.
|
|
|
(+) Refresh the WWDG.
|
|
|
(+) Handle WWDG interrupt request.
|
|
|
|
|
|
@endverbatim
|
|
|
* @{
|
|
|
*/
|
|
|
|
|
|
/**
|
|
|
* @brief Starts the WWDG.
|
|
|
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
|
|
|
* the configuration information for the specified WWDG module.
|
|
|
* @retval HAL status
|
|
|
*/
|
|
|
HAL_StatusTypeDef HAL_WWDG_Start(WWDG_HandleTypeDef *hwwdg)
|
|
|
{
|
|
|
/* Process Locked */
|
|
|
__HAL_LOCK(hwwdg);
|
|
|
|
|
|
/* Change WWDG peripheral state */
|
|
|
hwwdg->State = HAL_WWDG_STATE_BUSY;
|
|
|
|
|
|
/* Enable the peripheral */
|
|
|
__HAL_WWDG_ENABLE(hwwdg);
|
|
|
|
|
|
/* Change WWDG peripheral state */
|
|
|
hwwdg->State = HAL_WWDG_STATE_READY;
|
|
|
|
|
|
/* Process Unlocked */
|
|
|
__HAL_UNLOCK(hwwdg);
|
|
|
|
|
|
/* Return function status */
|
|
|
return HAL_OK;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @brief Starts the WWDG with interrupt enabled.
|
|
|
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
|
|
|
* the configuration information for the specified WWDG module.
|
|
|
* @retval HAL status
|
|
|
*/
|
|
|
HAL_StatusTypeDef HAL_WWDG_Start_IT(WWDG_HandleTypeDef *hwwdg)
|
|
|
{
|
|
|
/* Process Locked */
|
|
|
__HAL_LOCK(hwwdg);
|
|
|
|
|
|
/* Change WWDG peripheral state */
|
|
|
hwwdg->State = HAL_WWDG_STATE_BUSY;
|
|
|
|
|
|
/* Enable the Early Wakeup Interrupt */
|
|
|
__HAL_WWDG_ENABLE_IT(hwwdg, WWDG_IT_EWI);
|
|
|
|
|
|
/* Enable the peripheral */
|
|
|
__HAL_WWDG_ENABLE(hwwdg);
|
|
|
|
|
|
/* Return function status */
|
|
|
return HAL_OK;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @brief Refreshes the WWDG.
|
|
|
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
|
|
|
* the configuration information for the specified WWDG module.
|
|
|
* @param Counter: value of counter to put in WWDG counter
|
|
|
* @retval HAL status
|
|
|
*/
|
|
|
HAL_StatusTypeDef HAL_WWDG_Refresh(WWDG_HandleTypeDef *hwwdg, uint32_t Counter)
|
|
|
{
|
|
|
/* Process Locked */
|
|
|
__HAL_LOCK(hwwdg);
|
|
|
|
|
|
/* Change WWDG peripheral state */
|
|
|
hwwdg->State = HAL_WWDG_STATE_BUSY;
|
|
|
|
|
|
/* Check the parameters */
|
|
|
assert_param(IS_WWDG_COUNTER(Counter));
|
|
|
|
|
|
/* Write to WWDG CR the WWDG Counter value to refresh with */
|
|
|
MODIFY_REG(hwwdg->Instance->CR, (uint32_t)WWDG_CR_T, Counter);
|
|
|
|
|
|
/* Change WWDG peripheral state */
|
|
|
hwwdg->State = HAL_WWDG_STATE_READY;
|
|
|
|
|
|
/* Process Unlocked */
|
|
|
__HAL_UNLOCK(hwwdg);
|
|
|
|
|
|
/* Return function status */
|
|
|
return HAL_OK;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @brief Handles WWDG interrupt request.
|
|
|
* @note The Early Wakeup Interrupt (EWI) can be used if specific safety operations
|
|
|
* or data logging must be performed before the actual reset is generated.
|
|
|
* The EWI interrupt is enabled using __HAL_WWDG_ENABLE_IT() macro.
|
|
|
* When the downcounter reaches the value 0x40, and EWI interrupt is
|
|
|
* generated and the corresponding Interrupt Service Routine (ISR) can
|
|
|
* be used to trigger specific actions (such as communications or data
|
|
|
* logging), before resetting the device.
|
|
|
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
|
|
|
* the configuration information for the specified WWDG module.
|
|
|
* @retval None
|
|
|
*/
|
|
|
void HAL_WWDG_IRQHandler(WWDG_HandleTypeDef *hwwdg)
|
|
|
{
|
|
|
/* Check if Early Wakeup Interrupt is enable */
|
|
|
if(__HAL_WWDG_GET_IT_SOURCE(hwwdg, WWDG_IT_EWI) != RESET)
|
|
|
{
|
|
|
/* Check if WWDG Early Wakeup Interrupt occurred */
|
|
|
if(__HAL_WWDG_GET_FLAG(hwwdg, WWDG_FLAG_EWIF) != RESET)
|
|
|
{
|
|
|
/* Early Wakeup callback */
|
|
|
HAL_WWDG_WakeupCallback(hwwdg);
|
|
|
|
|
|
/* Change WWDG peripheral state */
|
|
|
hwwdg->State = HAL_WWDG_STATE_READY;
|
|
|
|
|
|
/* Clear the WWDG Early Wakeup flag */
|
|
|
__HAL_WWDG_CLEAR_FLAG(hwwdg, WWDG_FLAG_EWIF);
|
|
|
|
|
|
/* Process Unlocked */
|
|
|
__HAL_UNLOCK(hwwdg);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @brief Early Wakeup WWDG callback.
|
|
|
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
|
|
|
* the configuration information for the specified WWDG module.
|
|
|
* @retval None
|
|
|
*/
|
|
|
__weak void HAL_WWDG_WakeupCallback(WWDG_HandleTypeDef* hwwdg)
|
|
|
{
|
|
|
/* NOTE: This function Should not be modified, when the callback is needed,
|
|
|
the HAL_WWDG_WakeupCallback could be implemented in the user file
|
|
|
*/
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @}
|
|
|
*/
|
|
|
|
|
|
/** @defgroup WWDG_Exported_Functions_Group3 Peripheral State functions
|
|
|
* @brief Peripheral State functions.
|
|
|
*
|
|
|
@verbatim
|
|
|
==============================================================================
|
|
|
##### Peripheral State functions #####
|
|
|
==============================================================================
|
|
|
[..]
|
|
|
This subsection permits to get in run-time the status of the peripheral
|
|
|
and the data flow.
|
|
|
|
|
|
@endverbatim
|
|
|
* @{
|
|
|
*/
|
|
|
|
|
|
/**
|
|
|
* @brief Returns the WWDG state.
|
|
|
* @param hwwdg: pointer to a WWDG_HandleTypeDef structure that contains
|
|
|
* the configuration information for the specified WWDG module.
|
|
|
* @retval HAL state
|
|
|
*/
|
|
|
HAL_WWDG_StateTypeDef HAL_WWDG_GetState(WWDG_HandleTypeDef *hwwdg)
|
|
|
{
|
|
|
return hwwdg->State;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* @}
|
|
|
*/
|
|
|
|
|
|
/**
|
|
|
* @}
|
|
|
*/
|
|
|
|
|
|
#endif /* HAL_WWDG_MODULE_ENABLED */
|
|
|
/**
|
|
|
* @}
|
|
|
*/
|
|
|
|
|
|
/**
|
|
|
* @}
|
|
|
*/
|
|
|
|
|
|
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
|
