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218 lines
6.4 KiB
218 lines
6.4 KiB
/**
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******************************************************************************
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* @file stm8s_iwdg.h
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* @author MCD Application Team
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* @version V2.2.0
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* @date 30-September-2014
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* @brief This file contains all functions prototypes and macros for the IWDG peripheral.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
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*
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* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
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* You may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.st.com/software_license_agreement_liberty_v2
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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******************************************************************************
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*/
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/* Define to prevent recursive inclusion -------------------------------------*/
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#ifndef __STM8S_IWDG_H
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#define __STM8S_IWDG_H
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/* Includes ------------------------------------------------------------------*/
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#include "stm8s.h"
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/** @addtogroup STM8S_StdPeriph_Driver
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* @{
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*/
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/** @addtogroup IWDG_Private_Define
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* @{
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*/
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/**
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* @brief Define used to prevent watchdog reset
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*/
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#define IWDG_KEY_REFRESH ((uint8_t)0xAA) /*!< This value written in the Key register prevent the watchdog reset */
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/**
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* @brief Define used to start the watchdog counter down
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*/
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#define IWDG_KEY_ENABLE ((uint8_t)0xCC) /*!< This value written in the Key register start the watchdog counting down*/
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/**
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* @}
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*/
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/** @addtogroup IWDG_Private_Macros
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* @{
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*/
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/**
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* @brief Macro used by the assert function in order to check the different
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* values of the prescaler.
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*/
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#define IS_IWDG_PRESCALER_OK(VALUE) (((VALUE) == IWDG_Prescaler_4 ) || \
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((VALUE) == IWDG_Prescaler_8 ) || \
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((VALUE) == IWDG_Prescaler_16 ) || \
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((VALUE) == IWDG_Prescaler_32 ) || \
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((VALUE) == IWDG_Prescaler_64 ) || \
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((VALUE) == IWDG_Prescaler_128 ) || \
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((VALUE) == IWDG_Prescaler_256))
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/**
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* @brief Macro used by the assert function in order to check the different
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* values of the counter register.
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*/
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#define IS_IWDG_WRITEACCESS_MODE_OK(MODE) (((MODE) == IWDG_WriteAccess_Enable) || ((MODE) == IWDG_WriteAccess_Disable))
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/**
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* @}
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*/
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/** @addtogroup IWDG_Exported_Types
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* @{
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*/
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/** IWDG write access enumeration */
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typedef enum {
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IWDG_WriteAccess_Enable = (uint8_t) 0x55, /*!< Code 0x55 in Key register, allow write access to Prescaler and Reload registers */
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IWDG_WriteAccess_Disable = (uint8_t) 0x00 /*!< Code 0x00 in Key register, not allow write access to Prescaler and Reload registers */
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} IWDG_WriteAccess_TypeDef;
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/** IWDG prescaler enumaration */
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typedef enum {
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IWDG_Prescaler_4 = (uint8_t) 0x00, /*!< Used to set prescaler register to 4 */
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IWDG_Prescaler_8 = (uint8_t) 0x01, /*!< Used to set prescaler register to 8 */
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IWDG_Prescaler_16 = (uint8_t) 0x02, /*!< Used to set prescaler register to 16 */
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IWDG_Prescaler_32 = (uint8_t) 0x03, /*!< Used to set prescaler register to 32 */
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IWDG_Prescaler_64 = (uint8_t) 0x04, /*!< Used to set prescaler register to 64 */
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IWDG_Prescaler_128 = (uint8_t) 0x05, /*!< Used to set prescaler register to 128 */
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IWDG_Prescaler_256 = (uint8_t) 0x06 /*!< Used to set prescaler register to 256 */
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} IWDG_Prescaler_TypeDef;
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/**
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* @}
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*/
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/** @addtogroup IWDG_Exported_Functions
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* @{
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*/
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#if 0
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void IWDG_WriteAccessCmd(IWDG_WriteAccess_TypeDef IWDG_WriteAccess);
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void IWDG_SetPrescaler(IWDG_Prescaler_TypeDef IWDG_Prescaler);
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void IWDG_SetReload(uint8_t IWDG_Reload);
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void IWDG_ReloadCounter(void);
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void IWDG_Enable(void);
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#endif
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/**
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* @}
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*/
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/* Private define ------------------------------------------------------------*/
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/* Private macro -------------------------------------------------------------*/
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/* Private variables ---------------------------------------------------------*/
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/* Private function prototypes -----------------------------------------------*/
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/* Private functions ---------------------------------------------------------*/
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/* Public functions ----------------------------------------------------------*/
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/** @addtogroup IWDG_Public_Functions
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* @{
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*/
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/**
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* @brief Enables or disables write access to Prescaler and Reload registers.
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* @param IWDG_WriteAccess : New state of write access to Prescaler and Reload
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* registers. This parameter can be a value of @ref IWDG_WriteAccess_TypeDef.
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* @retval None
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*/
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inline void IWDG_WriteAccessCmd(IWDG_WriteAccess_TypeDef IWDG_WriteAccess)
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{
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/* Check the parameters */
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assert_param(IS_IWDG_WRITEACCESS_MODE_OK(IWDG_WriteAccess));
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IWDG->KR = (uint8_t) IWDG_WriteAccess; /* Write Access */
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}
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/**
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* @brief Sets IWDG Prescaler value.
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* @note Write access should be enabled
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* @param IWDG_Prescaler : Specifies the IWDG Prescaler value.
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* This parameter can be a value of @ref IWDG_Prescaler_TypeDef.
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* @retval None
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*/
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inline void IWDG_SetPrescaler(IWDG_Prescaler_TypeDef IWDG_Prescaler)
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{
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/* Check the parameters */
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assert_param(IS_IWDG_PRESCALER_OK(IWDG_Prescaler));
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IWDG->PR = (uint8_t) IWDG_Prescaler;
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}
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/**
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* @brief Sets IWDG Reload value.
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* @note Write access should be enabled
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* @param IWDG_Reload : Reload register value.
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* This parameter must be a number between 0 and 0xFF.
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* @retval None
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*/
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inline void IWDG_SetReload(uint8_t IWDG_Reload)
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{
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IWDG->RLR = IWDG_Reload;
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}
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/**
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* @brief Reloads IWDG counter
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* @note Write access should be enabled
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* @param None
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* @retval None
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*/
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inline void IWDG_ReloadCounter(void)
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{
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IWDG->KR = IWDG_KEY_REFRESH;
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}
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/**
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* @brief Enables IWDG.
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* @param None
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* @retval None
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*/
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inline void IWDG_Enable(void)
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{
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IWDG->KR = IWDG_KEY_ENABLE;
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}
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/**
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* @}
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*/
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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#endif /* __STM8S_IWDG_H */
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/**
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* @}
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*/
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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