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/**
******************************************************************************
* @file stm32f4xx_ll_iwdg.h
* @author MCD Application Team
* @brief Header file of IWDG LL module.
******************************************************************************
* @attention
*
* Copyright (c) 2016 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.
*
******************************************************************************
*/
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef STM32F4xx_LL_IWDG_H
#define STM32F4xx_LL_IWDG_H
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx.h"
/** @addtogroup STM32F4xx_LL_Driver
* @{
*/
#if defined(IWDG)
/** @defgroup IWDG_LL IWDG
* @{
*/
/* Private types -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private constants ---------------------------------------------------------*/
/** @defgroup IWDG_LL_Private_Constants IWDG Private Constants
* @{
*/
#define LL_IWDG_KEY_RELOAD 0x0000AAAAU /*!< IWDG Reload Counter Enable */
#define LL_IWDG_KEY_ENABLE 0x0000CCCCU /*!< IWDG Peripheral Enable */
#define LL_IWDG_KEY_WR_ACCESS_ENABLE 0x00005555U /*!< IWDG KR Write Access Enable */
#define LL_IWDG_KEY_WR_ACCESS_DISABLE 0x00000000U /*!< IWDG KR Write Access Disable */
/**
* @}
*/
/* Private macros ------------------------------------------------------------*/
/* Exported types ------------------------------------------------------------*/
/* Exported constants --------------------------------------------------------*/
/** @defgroup IWDG_LL_Exported_Constants IWDG Exported Constants
* @{
*/
/** @defgroup IWDG_LL_EC_GET_FLAG Get Flags Defines
* @brief Flags defines which can be used with LL_IWDG_ReadReg function
* @{
*/
#define LL_IWDG_SR_PVU IWDG_SR_PVU /*!< Watchdog prescaler value update */
#define LL_IWDG_SR_RVU IWDG_SR_RVU /*!< Watchdog counter reload value update */
/**
* @}
*/
/** @defgroup IWDG_LL_EC_PRESCALER Prescaler Divider
* @{
*/
#define LL_IWDG_PRESCALER_4 0x00000000U /*!< Divider by 4 */
#define LL_IWDG_PRESCALER_8 (IWDG_PR_PR_0) /*!< Divider by 8 */
#define LL_IWDG_PRESCALER_16 (IWDG_PR_PR_1) /*!< Divider by 16 */
#define LL_IWDG_PRESCALER_32 (IWDG_PR_PR_1 | IWDG_PR_PR_0) /*!< Divider by 32 */
#define LL_IWDG_PRESCALER_64 (IWDG_PR_PR_2) /*!< Divider by 64 */
#define LL_IWDG_PRESCALER_128 (IWDG_PR_PR_2 | IWDG_PR_PR_0) /*!< Divider by 128 */
#define LL_IWDG_PRESCALER_256 (IWDG_PR_PR_2 | IWDG_PR_PR_1) /*!< Divider by 256 */
/**
* @}
*/
/**
* @}
*/
/* Exported macro ------------------------------------------------------------*/
/** @defgroup IWDG_LL_Exported_Macros IWDG Exported Macros
* @{
*/
/** @defgroup IWDG_LL_EM_WRITE_READ Common Write and read registers Macros
* @{
*/
/**
* @brief Write a value in IWDG register
* @param __INSTANCE__ IWDG Instance
* @param __REG__ Register to be written
* @param __VALUE__ Value to be written in the register
* @retval None
*/
#define LL_IWDG_WriteReg(__INSTANCE__, __REG__, __VALUE__) WRITE_REG(__INSTANCE__->__REG__, (__VALUE__))
/**
* @brief Read a value in IWDG register
* @param __INSTANCE__ IWDG Instance
* @param __REG__ Register to be read
* @retval Register value
*/
#define LL_IWDG_ReadReg(__INSTANCE__, __REG__) READ_REG(__INSTANCE__->__REG__)
/**
* @}
*/
/**
* @}
*/
/* Exported functions --------------------------------------------------------*/
/** @defgroup IWDG_LL_Exported_Functions IWDG Exported Functions
* @{
*/
/** @defgroup IWDG_LL_EF_Configuration Configuration
* @{
*/
/**
* @brief Start the Independent Watchdog
* @note Except if the hardware watchdog option is selected
* @rmtoll KR KEY LL_IWDG_Enable
* @param IWDGx IWDG Instance
* @retval None
*/
__STATIC_INLINE void LL_IWDG_Enable(IWDG_TypeDef *IWDGx)
{
WRITE_REG(IWDGx->KR, LL_IWDG_KEY_ENABLE);
}
/**
* @brief Reloads IWDG counter with value defined in the reload register
* @rmtoll KR KEY LL_IWDG_ReloadCounter
* @param IWDGx IWDG Instance
* @retval None
*/
__STATIC_INLINE void LL_IWDG_ReloadCounter(IWDG_TypeDef *IWDGx)
{
WRITE_REG(IWDGx->KR, LL_IWDG_KEY_RELOAD);
}
/**
* @brief Enable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers
* @rmtoll KR KEY LL_IWDG_EnableWriteAccess
* @param IWDGx IWDG Instance
* @retval None
*/
__STATIC_INLINE void LL_IWDG_EnableWriteAccess(IWDG_TypeDef *IWDGx)
{
WRITE_REG(IWDGx->KR, LL_IWDG_KEY_WR_ACCESS_ENABLE);
}
/**
* @brief Disable write access to IWDG_PR, IWDG_RLR and IWDG_WINR registers
* @rmtoll KR KEY LL_IWDG_DisableWriteAccess
* @param IWDGx IWDG Instance
* @retval None
*/
__STATIC_INLINE void LL_IWDG_DisableWriteAccess(IWDG_TypeDef *IWDGx)
{
WRITE_REG(IWDGx->KR, LL_IWDG_KEY_WR_ACCESS_DISABLE);
}
/**
* @brief Select the prescaler of the IWDG
* @rmtoll PR PR LL_IWDG_SetPrescaler
* @param IWDGx IWDG Instance
* @param Prescaler This parameter can be one of the following values:
* @arg @ref LL_IWDG_PRESCALER_4
* @arg @ref LL_IWDG_PRESCALER_8
* @arg @ref LL_IWDG_PRESCALER_16
* @arg @ref LL_IWDG_PRESCALER_32
* @arg @ref LL_IWDG_PRESCALER_64
* @arg @ref LL_IWDG_PRESCALER_128
* @arg @ref LL_IWDG_PRESCALER_256
* @retval None
*/
__STATIC_INLINE void LL_IWDG_SetPrescaler(IWDG_TypeDef *IWDGx, uint32_t Prescaler)
{
WRITE_REG(IWDGx->PR, IWDG_PR_PR & Prescaler);
}
/**
* @brief Get the selected prescaler of the IWDG
* @rmtoll PR PR LL_IWDG_GetPrescaler
* @param IWDGx IWDG Instance
* @retval Returned value can be one of the following values:
* @arg @ref LL_IWDG_PRESCALER_4
* @arg @ref LL_IWDG_PRESCALER_8
* @arg @ref LL_IWDG_PRESCALER_16
* @arg @ref LL_IWDG_PRESCALER_32
* @arg @ref LL_IWDG_PRESCALER_64
* @arg @ref LL_IWDG_PRESCALER_128
* @arg @ref LL_IWDG_PRESCALER_256
*/
__STATIC_INLINE uint32_t LL_IWDG_GetPrescaler(IWDG_TypeDef *IWDGx)
{
return (READ_REG(IWDGx->PR));
}
/**
* @brief Specify the IWDG down-counter reload value
* @rmtoll RLR RL LL_IWDG_SetReloadCounter
* @param IWDGx IWDG Instance
* @param Counter Value between Min_Data=0 and Max_Data=0x0FFF
* @retval None
*/
__STATIC_INLINE void LL_IWDG_SetReloadCounter(IWDG_TypeDef *IWDGx, uint32_t Counter)
{
WRITE_REG(IWDGx->RLR, IWDG_RLR_RL & Counter);
}
/**
* @brief Get the specified IWDG down-counter reload value
* @rmtoll RLR RL LL_IWDG_GetReloadCounter
* @param IWDGx IWDG Instance
* @retval Value between Min_Data=0 and Max_Data=0x0FFF
*/
__STATIC_INLINE uint32_t LL_IWDG_GetReloadCounter(IWDG_TypeDef *IWDGx)
{
return (READ_REG(IWDGx->RLR));
}
/**
* @}
*/
/** @defgroup IWDG_LL_EF_FLAG_Management FLAG_Management
* @{
*/
/**
* @brief Check if flag Prescaler Value Update is set or not
* @rmtoll SR PVU LL_IWDG_IsActiveFlag_PVU
* @param IWDGx IWDG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_IWDG_IsActiveFlag_PVU(IWDG_TypeDef *IWDGx)
{
return ((READ_BIT(IWDGx->SR, IWDG_SR_PVU) == (IWDG_SR_PVU)) ? 1UL : 0UL);
}
/**
* @brief Check if flag Reload Value Update is set or not
* @rmtoll SR RVU LL_IWDG_IsActiveFlag_RVU
* @param IWDGx IWDG Instance
* @retval State of bit (1 or 0).
*/
__STATIC_INLINE uint32_t LL_IWDG_IsActiveFlag_RVU(IWDG_TypeDef *IWDGx)
{
return ((READ_BIT(IWDGx->SR, IWDG_SR_RVU) == (IWDG_SR_RVU)) ? 1UL : 0UL);
}
/**
* @brief Check if flags Prescaler & Reload Value Update are reset or not
* @rmtoll SR PVU LL_IWDG_IsReady\n
* SR RVU LL_IWDG_IsReady
* @param IWDGx IWDG Instance
* @retval State of bits (1 or 0).
*/
__STATIC_INLINE uint32_t LL_IWDG_IsReady(IWDG_TypeDef *IWDGx)
{
return ((READ_BIT(IWDGx->SR, IWDG_SR_PVU | IWDG_SR_RVU) == 0U) ? 1UL : 0UL);
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
#endif /* IWDG */
/**
* @}
*/
#ifdef __cplusplus
}
#endif
#endif /* STM32F4xx_LL_IWDG_H */