/** ****************************************************************************** * @file stm32f10x_iwdg.c * @author MCD Application Team * @version V3.1.2 * @date 09/28/2009 * @brief This file provides all the IWDG firmware functions. ****************************************************************************** * @copy * * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS. * *

© COPYRIGHT 2009 STMicroelectronics

*/ /* Includes ------------------------------------------------------------------*/ #include "stm32f10x_iwdg.h" /** @addtogroup STM32F10x_StdPeriph_Driver * @{ */ /** @defgroup IWDG * @brief IWDG driver modules * @{ */ /** @defgroup IWDG_Private_TypesDefinitions * @{ */ /** * @} */ /** @defgroup IWDG_Private_Defines * @{ */ /* ---------------------- IWDG registers bit mask ----------------------------*/ /* KR register bit mask */ #define KR_KEY_Reload ((uint16_t)0xAAAA) #define KR_KEY_Enable ((uint16_t)0xCCCC) /** * @} */ /** @defgroup IWDG_Private_Macros * @{ */ /** * @} */ /** @defgroup IWDG_Private_Variables * @{ */ /** * @} */ /** @defgroup IWDG_Private_FunctionPrototypes * @{ */ /** * @} */ /** @defgroup IWDG_Private_Functions * @{ */ /** * @brief Enables or disables write access to IWDG_PR and IWDG_RLR registers. * @param IWDG_WriteAccess: new state of write access to IWDG_PR and IWDG_RLR registers. * This parameter can be one of the following values: * @arg IWDG_WriteAccess_Enable: Enable write access to IWDG_PR and IWDG_RLR registers * @arg IWDG_WriteAccess_Disable: Disable write access to IWDG_PR and IWDG_RLR registers * @retval None */ void IWDG_WriteAccessCmd(uint16_t IWDG_WriteAccess) { /* Check the parameters */ assert_param(IS_IWDG_WRITE_ACCESS(IWDG_WriteAccess)); IWDG->KR = IWDG_WriteAccess; } /** * @brief Sets IWDG Prescaler value. * @param IWDG_Prescaler: specifies the IWDG Prescaler value. * This parameter can be one of the following values: * @arg IWDG_Prescaler_4: IWDG prescaler set to 4 * @arg IWDG_Prescaler_8: IWDG prescaler set to 8 * @arg IWDG_Prescaler_16: IWDG prescaler set to 16 * @arg IWDG_Prescaler_32: IWDG prescaler set to 32 * @arg IWDG_Prescaler_64: IWDG prescaler set to 64 * @arg IWDG_Prescaler_128: IWDG prescaler set to 128 * @arg IWDG_Prescaler_256: IWDG prescaler set to 256 * @retval None */ void IWDG_SetPrescaler(uint8_t IWDG_Prescaler) { /* Check the parameters */ assert_param(IS_IWDG_PRESCALER(IWDG_Prescaler)); IWDG->PR = IWDG_Prescaler; } /** * @brief Sets IWDG Reload value. * @param Reload: specifies the IWDG Reload value. * This parameter must be a number between 0 and 0x0FFF. * @retval None */ void IWDG_SetReload(uint16_t Reload) { /* Check the parameters */ assert_param(IS_IWDG_RELOAD(Reload)); IWDG->RLR = Reload; } /** * @brief Reloads IWDG counter with value defined in the reload register * (write access to IWDG_PR and IWDG_RLR registers disabled). * @param None * @retval None */ void IWDG_ReloadCounter(void) { IWDG->KR = KR_KEY_Reload; } /** * @brief Enables IWDG (write access to IWDG_PR and IWDG_RLR registers disabled). * @param None * @retval None */ void IWDG_Enable(void) { IWDG->KR = KR_KEY_Enable; } /** * @brief Checks whether the specified IWDG flag is set or not. * @param IWDG_FLAG: specifies the flag to check. * This parameter can be one of the following values: * @arg IWDG_FLAG_PVU: Prescaler Value Update on going * @arg IWDG_FLAG_RVU: Reload Value Update on going * @retval The new state of IWDG_FLAG (SET or RESET). */ FlagStatus IWDG_GetFlagStatus(uint16_t IWDG_FLAG) { FlagStatus bitstatus = RESET; /* Check the parameters */ assert_param(IS_IWDG_FLAG(IWDG_FLAG)); if ((IWDG->SR & IWDG_FLAG) != (uint32_t)RESET) { bitstatus = SET; } else { bitstatus = RESET; } /* Return the flag status */ return bitstatus; } /** * @} */ /** * @} */ /** * @} */ /******************* (C) COPYRIGHT 2009 STMicroelectronics *****END OF FILE****/