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amiro-blt / Target / Modules / LightRing_1-0 / Boot / lib / STM32F10x_StdPeriph_Driver / src / stm32f10x_iwdg.c @ 367c0652

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/**
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  ******************************************************************************
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  * @file    stm32f10x_iwdg.c
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  * @author  MCD Application Team
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  * @version V3.5.0
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  * @date    11-March-2011
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  * @brief   This file provides all the IWDG firmware functions.
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  ******************************************************************************
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  * @attention
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  *
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  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
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  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
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  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
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  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
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  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
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  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
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  *
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  * <h2><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h2>
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  ******************************************************************************
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  */
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/* Includes ------------------------------------------------------------------*/
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#include "stm32f10x_iwdg.h"
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/** @addtogroup STM32F10x_StdPeriph_Driver
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  * @{
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  */
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/** @defgroup IWDG 
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  * @brief IWDG driver modules
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  * @{
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  */ 
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/** @defgroup IWDG_Private_TypesDefinitions
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  * @{
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  */
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/**
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  * @}
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  */
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/** @defgroup IWDG_Private_Defines
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  * @{
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  */ 
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/* ---------------------- IWDG registers bit mask ----------------------------*/
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/* KR register bit mask */
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#define KR_KEY_Reload    ((uint16_t)0xAAAA)
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#define KR_KEY_Enable    ((uint16_t)0xCCCC)
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/**
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  * @}
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  */ 
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/** @defgroup IWDG_Private_Macros
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  * @{
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  */
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/**
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  * @}
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  */
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/** @defgroup IWDG_Private_Variables
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  * @{
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  */
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/**
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  * @}
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  */
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/** @defgroup IWDG_Private_FunctionPrototypes
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  * @{
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  */
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/**
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  * @}
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  */
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/** @defgroup IWDG_Private_Functions
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  * @{
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  */
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/**
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  * @brief  Enables or disables write access to IWDG_PR and IWDG_RLR registers.
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  * @param  IWDG_WriteAccess: new state of write access to IWDG_PR and IWDG_RLR registers.
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  *   This parameter can be one of the following values:
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  *     @arg IWDG_WriteAccess_Enable: Enable write access to IWDG_PR and IWDG_RLR registers
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  *     @arg IWDG_WriteAccess_Disable: Disable write access to IWDG_PR and IWDG_RLR registers
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  * @retval None
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  */
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void IWDG_WriteAccessCmd(uint16_t IWDG_WriteAccess)
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{
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  /* Check the parameters */
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  assert_param(IS_IWDG_WRITE_ACCESS(IWDG_WriteAccess));
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  IWDG->KR = IWDG_WriteAccess;
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}
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/**
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  * @brief  Sets IWDG Prescaler value.
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  * @param  IWDG_Prescaler: specifies the IWDG Prescaler value.
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  *   This parameter can be one of the following values:
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  *     @arg IWDG_Prescaler_4: IWDG prescaler set to 4
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  *     @arg IWDG_Prescaler_8: IWDG prescaler set to 8
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  *     @arg IWDG_Prescaler_16: IWDG prescaler set to 16
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  *     @arg IWDG_Prescaler_32: IWDG prescaler set to 32
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  *     @arg IWDG_Prescaler_64: IWDG prescaler set to 64
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  *     @arg IWDG_Prescaler_128: IWDG prescaler set to 128
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  *     @arg IWDG_Prescaler_256: IWDG prescaler set to 256
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  * @retval None
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  */
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void IWDG_SetPrescaler(uint8_t IWDG_Prescaler)
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{
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  /* Check the parameters */
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  assert_param(IS_IWDG_PRESCALER(IWDG_Prescaler));
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  IWDG->PR = IWDG_Prescaler;
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}
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/**
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  * @brief  Sets IWDG Reload value.
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  * @param  Reload: specifies the IWDG Reload value.
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  *   This parameter must be a number between 0 and 0x0FFF.
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  * @retval None
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  */
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void IWDG_SetReload(uint16_t Reload)
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{
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  /* Check the parameters */
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  assert_param(IS_IWDG_RELOAD(Reload));
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  IWDG->RLR = Reload;
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}
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/**
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  * @brief  Reloads IWDG counter with value defined in the reload register
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  *   (write access to IWDG_PR and IWDG_RLR registers disabled).
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  * @param  None
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  * @retval None
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  */
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void IWDG_ReloadCounter(void)
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{
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  IWDG->KR = KR_KEY_Reload;
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}
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/**
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  * @brief  Enables IWDG (write access to IWDG_PR and IWDG_RLR registers disabled).
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  * @param  None
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  * @retval None
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  */
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void IWDG_Enable(void)
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{
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  IWDG->KR = KR_KEY_Enable;
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}
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/**
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  * @brief  Checks whether the specified IWDG flag is set or not.
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  * @param  IWDG_FLAG: specifies the flag to check.
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  *   This parameter can be one of the following values:
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  *     @arg IWDG_FLAG_PVU: Prescaler Value Update on going
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  *     @arg IWDG_FLAG_RVU: Reload Value Update on going
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  * @retval The new state of IWDG_FLAG (SET or RESET).
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  */
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FlagStatus IWDG_GetFlagStatus(uint16_t IWDG_FLAG)
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{
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  FlagStatus bitstatus = RESET;
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  /* Check the parameters */
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  assert_param(IS_IWDG_FLAG(IWDG_FLAG));
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  if ((IWDG->SR & IWDG_FLAG) != (uint32_t)RESET)
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  {
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    bitstatus = SET;
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  }
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  else
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  {
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    bitstatus = RESET;
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  }
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  /* Return the flag status */
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  return bitstatus;
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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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/**
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  * @}
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  */
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/******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/