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190 lines
4.6 KiB
190 lines
4.6 KiB
/**
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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>© 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****/
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