317 lines
9.9 KiB
C
317 lines
9.9 KiB
C
/**
|
|
******************************************************************************
|
|
* @file stm32f7xx_ll_wwdg.h
|
|
* @author MCD Application Team
|
|
* @brief Header file of WWDG LL module.
|
|
******************************************************************************
|
|
* @attention
|
|
*
|
|
* Copyright (c) 2017 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 STM32F7xx_LL_WWDG_H
|
|
#define STM32F7xx_LL_WWDG_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Includes ------------------------------------------------------------------*/
|
|
#include "stm32f7xx.h"
|
|
|
|
/** @addtogroup STM32F7xx_LL_Driver
|
|
* @{
|
|
*/
|
|
|
|
#if defined (WWDG)
|
|
|
|
/** @defgroup WWDG_LL WWDG
|
|
* @{
|
|
*/
|
|
|
|
/* Private types -------------------------------------------------------------*/
|
|
/* Private variables ---------------------------------------------------------*/
|
|
/* Private constants ---------------------------------------------------------*/
|
|
/* Private macros ------------------------------------------------------------*/
|
|
/* Exported types ------------------------------------------------------------*/
|
|
/* Exported constants --------------------------------------------------------*/
|
|
/** @defgroup WWDG_LL_Exported_Constants WWDG Exported Constants
|
|
* @{
|
|
*/
|
|
|
|
/** @defgroup WWDG_LL_EC_IT IT Defines
|
|
* @brief IT defines which can be used with LL_WWDG_ReadReg and LL_WWDG_WriteReg functions
|
|
* @{
|
|
*/
|
|
#define LL_WWDG_CFR_EWI WWDG_CFR_EWI
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup WWDG_LL_EC_PRESCALER PRESCALER
|
|
* @{
|
|
*/
|
|
#define LL_WWDG_PRESCALER_1 0x00000000u /*!< WWDG counter clock = (PCLK1/4096)/1 */
|
|
#define LL_WWDG_PRESCALER_2 WWDG_CFR_WDGTB_0 /*!< WWDG counter clock = (PCLK1/4096)/2 */
|
|
#define LL_WWDG_PRESCALER_4 WWDG_CFR_WDGTB_1 /*!< WWDG counter clock = (PCLK1/4096)/4 */
|
|
#define LL_WWDG_PRESCALER_8 (WWDG_CFR_WDGTB_0 | WWDG_CFR_WDGTB_1) /*!< WWDG counter clock = (PCLK1/4096)/8 */
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/* Exported macro ------------------------------------------------------------*/
|
|
/** @defgroup WWDG_LL_Exported_Macros WWDG Exported Macros
|
|
* @{
|
|
*/
|
|
/** @defgroup WWDG_LL_EM_WRITE_READ Common Write and read registers macros
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Write a value in WWDG register
|
|
* @param __INSTANCE__ WWDG Instance
|
|
* @param __REG__ Register to be written
|
|
* @param __VALUE__ Value to be written in the register
|
|
* @retval None
|
|
*/
|
|
#define LL_WWDG_WriteReg(__INSTANCE__, __REG__, __VALUE__) WRITE_REG(__INSTANCE__->__REG__, (__VALUE__))
|
|
|
|
/**
|
|
* @brief Read a value in WWDG register
|
|
* @param __INSTANCE__ WWDG Instance
|
|
* @param __REG__ Register to be read
|
|
* @retval Register value
|
|
*/
|
|
#define LL_WWDG_ReadReg(__INSTANCE__, __REG__) READ_REG(__INSTANCE__->__REG__)
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/* Exported functions --------------------------------------------------------*/
|
|
/** @defgroup WWDG_LL_Exported_Functions WWDG Exported Functions
|
|
* @{
|
|
*/
|
|
|
|
/** @defgroup WWDG_LL_EF_Configuration Configuration
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Enable Window Watchdog. The watchdog is always disabled after a reset.
|
|
* @note It is enabled by setting the WDGA bit in the WWDG_CR register,
|
|
* then it cannot be disabled again except by a reset.
|
|
* This bit is set by software and only cleared by hardware after a reset.
|
|
* When WDGA = 1, the watchdog can generate a reset.
|
|
* @rmtoll CR WDGA LL_WWDG_Enable
|
|
* @param WWDGx WWDG Instance
|
|
* @retval None
|
|
*/
|
|
__STATIC_INLINE void LL_WWDG_Enable(WWDG_TypeDef *WWDGx)
|
|
{
|
|
SET_BIT(WWDGx->CR, WWDG_CR_WDGA);
|
|
}
|
|
|
|
/**
|
|
* @brief Checks if Window Watchdog is enabled
|
|
* @rmtoll CR WDGA LL_WWDG_IsEnabled
|
|
* @param WWDGx WWDG Instance
|
|
* @retval State of bit (1 or 0).
|
|
*/
|
|
__STATIC_INLINE uint32_t LL_WWDG_IsEnabled(WWDG_TypeDef *WWDGx)
|
|
{
|
|
return ((READ_BIT(WWDGx->CR, WWDG_CR_WDGA) == (WWDG_CR_WDGA)) ? 1UL : 0UL);
|
|
}
|
|
|
|
/**
|
|
* @brief Set the Watchdog counter value to provided value (7-bits T[6:0])
|
|
* @note When writing to the WWDG_CR register, always write 1 in the MSB b6 to avoid generating an immediate reset
|
|
* This counter is decremented every (4096 x 2expWDGTB) PCLK cycles
|
|
* A reset is produced when it rolls over from 0x40 to 0x3F (bit T6 becomes cleared)
|
|
* Setting the counter lower then 0x40 causes an immediate reset (if WWDG enabled)
|
|
* @rmtoll CR T LL_WWDG_SetCounter
|
|
* @param WWDGx WWDG Instance
|
|
* @param Counter 0..0x7F (7 bit counter value)
|
|
* @retval None
|
|
*/
|
|
__STATIC_INLINE void LL_WWDG_SetCounter(WWDG_TypeDef *WWDGx, uint32_t Counter)
|
|
{
|
|
MODIFY_REG(WWDGx->CR, WWDG_CR_T, Counter);
|
|
}
|
|
|
|
/**
|
|
* @brief Return current Watchdog Counter Value (7 bits counter value)
|
|
* @rmtoll CR T LL_WWDG_GetCounter
|
|
* @param WWDGx WWDG Instance
|
|
* @retval 7 bit Watchdog Counter value
|
|
*/
|
|
__STATIC_INLINE uint32_t LL_WWDG_GetCounter(WWDG_TypeDef *WWDGx)
|
|
{
|
|
return (READ_BIT(WWDGx->CR, WWDG_CR_T));
|
|
}
|
|
|
|
/**
|
|
* @brief Set the time base of the prescaler (WDGTB).
|
|
* @note Prescaler is used to apply ratio on PCLK clock, so that Watchdog counter
|
|
* is decremented every (4096 x 2expWDGTB) PCLK cycles
|
|
* @rmtoll CFR WDGTB LL_WWDG_SetPrescaler
|
|
* @param WWDGx WWDG Instance
|
|
* @param Prescaler This parameter can be one of the following values:
|
|
* @arg @ref LL_WWDG_PRESCALER_1
|
|
* @arg @ref LL_WWDG_PRESCALER_2
|
|
* @arg @ref LL_WWDG_PRESCALER_4
|
|
* @arg @ref LL_WWDG_PRESCALER_8
|
|
* @retval None
|
|
*/
|
|
__STATIC_INLINE void LL_WWDG_SetPrescaler(WWDG_TypeDef *WWDGx, uint32_t Prescaler)
|
|
{
|
|
MODIFY_REG(WWDGx->CFR, WWDG_CFR_WDGTB, Prescaler);
|
|
}
|
|
|
|
/**
|
|
* @brief Return current Watchdog Prescaler Value
|
|
* @rmtoll CFR WDGTB LL_WWDG_GetPrescaler
|
|
* @param WWDGx WWDG Instance
|
|
* @retval Returned value can be one of the following values:
|
|
* @arg @ref LL_WWDG_PRESCALER_1
|
|
* @arg @ref LL_WWDG_PRESCALER_2
|
|
* @arg @ref LL_WWDG_PRESCALER_4
|
|
* @arg @ref LL_WWDG_PRESCALER_8
|
|
*/
|
|
__STATIC_INLINE uint32_t LL_WWDG_GetPrescaler(WWDG_TypeDef *WWDGx)
|
|
{
|
|
return (READ_BIT(WWDGx->CFR, WWDG_CFR_WDGTB));
|
|
}
|
|
|
|
/**
|
|
* @brief Set the Watchdog Window value to be compared to the downcounter (7-bits W[6:0]).
|
|
* @note This window value defines when write in the WWDG_CR register
|
|
* to program Watchdog counter is allowed.
|
|
* Watchdog counter value update must occur only when the counter value
|
|
* is lower than the Watchdog window register value.
|
|
* Otherwise, a MCU reset is generated if the 7-bit Watchdog counter value
|
|
* (in the control register) is refreshed before the downcounter has reached
|
|
* the watchdog window register value.
|
|
* Physically is possible to set the Window lower then 0x40 but it is not recommended.
|
|
* To generate an immediate reset, it is possible to set the Counter lower than 0x40.
|
|
* @rmtoll CFR W LL_WWDG_SetWindow
|
|
* @param WWDGx WWDG Instance
|
|
* @param Window 0x00..0x7F (7 bit Window value)
|
|
* @retval None
|
|
*/
|
|
__STATIC_INLINE void LL_WWDG_SetWindow(WWDG_TypeDef *WWDGx, uint32_t Window)
|
|
{
|
|
MODIFY_REG(WWDGx->CFR, WWDG_CFR_W, Window);
|
|
}
|
|
|
|
/**
|
|
* @brief Return current Watchdog Window Value (7 bits value)
|
|
* @rmtoll CFR W LL_WWDG_GetWindow
|
|
* @param WWDGx WWDG Instance
|
|
* @retval 7 bit Watchdog Window value
|
|
*/
|
|
__STATIC_INLINE uint32_t LL_WWDG_GetWindow(WWDG_TypeDef *WWDGx)
|
|
{
|
|
return (READ_BIT(WWDGx->CFR, WWDG_CFR_W));
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup WWDG_LL_EF_FLAG_Management FLAG_Management
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Indicates if the WWDG Early Wakeup Interrupt Flag is set or not.
|
|
* @note This bit is set by hardware when the counter has reached the value 0x40.
|
|
* It must be cleared by software by writing 0.
|
|
* A write of 1 has no effect. This bit is also set if the interrupt is not enabled.
|
|
* @rmtoll SR EWIF LL_WWDG_IsActiveFlag_EWKUP
|
|
* @param WWDGx WWDG Instance
|
|
* @retval State of bit (1 or 0).
|
|
*/
|
|
__STATIC_INLINE uint32_t LL_WWDG_IsActiveFlag_EWKUP(WWDG_TypeDef *WWDGx)
|
|
{
|
|
return ((READ_BIT(WWDGx->SR, WWDG_SR_EWIF) == (WWDG_SR_EWIF)) ? 1UL : 0UL);
|
|
}
|
|
|
|
/**
|
|
* @brief Clear WWDG Early Wakeup Interrupt Flag (EWIF)
|
|
* @rmtoll SR EWIF LL_WWDG_ClearFlag_EWKUP
|
|
* @param WWDGx WWDG Instance
|
|
* @retval None
|
|
*/
|
|
__STATIC_INLINE void LL_WWDG_ClearFlag_EWKUP(WWDG_TypeDef *WWDGx)
|
|
{
|
|
WRITE_REG(WWDGx->SR, ~WWDG_SR_EWIF);
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/** @defgroup WWDG_LL_EF_IT_Management IT_Management
|
|
* @{
|
|
*/
|
|
/**
|
|
* @brief Enable the Early Wakeup Interrupt.
|
|
* @note When set, an interrupt occurs whenever the counter reaches value 0x40.
|
|
* This interrupt is only cleared by hardware after a reset
|
|
* @rmtoll CFR EWI LL_WWDG_EnableIT_EWKUP
|
|
* @param WWDGx WWDG Instance
|
|
* @retval None
|
|
*/
|
|
__STATIC_INLINE void LL_WWDG_EnableIT_EWKUP(WWDG_TypeDef *WWDGx)
|
|
{
|
|
SET_BIT(WWDGx->CFR, WWDG_CFR_EWI);
|
|
}
|
|
|
|
/**
|
|
* @brief Check if Early Wakeup Interrupt is enabled
|
|
* @rmtoll CFR EWI LL_WWDG_IsEnabledIT_EWKUP
|
|
* @param WWDGx WWDG Instance
|
|
* @retval State of bit (1 or 0).
|
|
*/
|
|
__STATIC_INLINE uint32_t LL_WWDG_IsEnabledIT_EWKUP(WWDG_TypeDef *WWDGx)
|
|
{
|
|
return ((READ_BIT(WWDGx->CFR, WWDG_CFR_EWI) == (WWDG_CFR_EWI)) ? 1UL : 0UL);
|
|
}
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* WWDG */
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* STM32F7xx_LL_WWDG_H */
|