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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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