- /******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
- * File Name : stm32f10x_iwdg.c
- * Author : MCD Application Team
- * Version : V2.0.2
- * Date : 07/11/2008
- * Description : This file provides all the IWDG firmware functions.
- ********************************************************************************
- * 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.
- *******************************************************************************/
- /* Includes ------------------------------------------------------------------*/
- #include "stm32f10x_iwdg.h"
- /* Private typedef -----------------------------------------------------------*/
- /* Private define ------------------------------------------------------------*/
- /* ---------------------- IWDG registers bit mask ------------------------ */
- /* KR register bit mask */
- #define KR_KEY_Reload ((u16)0xAAAA)
- #define KR_KEY_Enable ((u16)0xCCCC)
- /* Private macro -------------------------------------------------------------*/
- /* Private variables ---------------------------------------------------------*/
- /* Private function prototypes -----------------------------------------------*/
- /* Private functions ---------------------------------------------------------*/
- /*******************************************************************************
- * Function Name : IWDG_WriteAccessCmd
- * Description : Enables or disables write access to IWDG_PR and IWDG_RLR
- * registers.
- * Input : - IWDG_WriteAccess: new state of write access to IWDG_PR and
- * IWDG_RLR registers.
- * This parameter can be one of the following values:
- * - IWDG_WriteAccess_Enable: Enable write access to
- * IWDG_PR and IWDG_RLR registers
- * - IWDG_WriteAccess_Disable: Disable write access to
- * IWDG_PR and IWDG_RLR registers
- * Output : None
- * Return : None
- *******************************************************************************/
- void IWDG_WriteAccessCmd(u16 IWDG_WriteAccess)
- {
- /* Check the parameters */
- assert_param(IS_IWDG_WRITE_ACCESS(IWDG_WriteAccess));
- IWDG->KR = IWDG_WriteAccess;
- }
- /*******************************************************************************
- * Function Name : IWDG_SetPrescaler
- * Description : Sets IWDG Prescaler value.
- * Input : - IWDG_Prescaler: specifies the IWDG Prescaler value.
- * This parameter can be one of the following values:
- * - IWDG_Prescaler_4: IWDG prescaler set to 4
- * - IWDG_Prescaler_8: IWDG prescaler set to 8
- * - IWDG_Prescaler_16: IWDG prescaler set to 16
- * - IWDG_Prescaler_32: IWDG prescaler set to 32
- * - IWDG_Prescaler_64: IWDG prescaler set to 64
- * - IWDG_Prescaler_128: IWDG prescaler set to 128
- * - IWDG_Prescaler_256: IWDG prescaler set to 256
- * Output : None
- * Return : None
- *******************************************************************************/
- void IWDG_SetPrescaler(u8 IWDG_Prescaler)
- {
- /* Check the parameters */
- assert_param(IS_IWDG_PRESCALER(IWDG_Prescaler));
- IWDG->PR = IWDG_Prescaler;
- }
- /*******************************************************************************
- * Function Name : IWDG_SetReload
- * Description : Sets IWDG Reload value.
- * Input : - Reload: specifies the IWDG Reload value.
- * This parameter must be a number between 0 and 0x0FFF.
- * Output : None
- * Return : None
- *******************************************************************************/
- void IWDG_SetReload(u16 Reload)
- {
- /* Check the parameters */
- assert_param(IS_IWDG_RELOAD(Reload));
- IWDG->RLR = Reload;
- }
- /*******************************************************************************
- * Function Name : IWDG_ReloadCounter
- * Description : Reloads IWDG counter with value defined in the reload register
- * (write access to IWDG_PR and IWDG_RLR registers disabled).
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void IWDG_ReloadCounter(void)
- {
- IWDG->KR = KR_KEY_Reload;
- }
- /*******************************************************************************
- * Function Name : IWDG_Enable
- * Description : Enables IWDG (write access to IWDG_PR and IWDG_RLR registers
- * disabled).
- * Input : None
- * Output : None
- * Return : None
- *******************************************************************************/
- void IWDG_Enable(void)
- {
- IWDG->KR = KR_KEY_Enable;
- }
- /*******************************************************************************
- * Function Name : IWDG_GetFlagStatus
- * Description : Checks whether the specified IWDG flag is set or not.
- * Input : - IWDG_FLAG: specifies the flag to check.
- * This parameter can be one of the following values:
- * - IWDG_FLAG_PVU: Prescaler Value Update on going
- * - IWDG_FLAG_RVU: Reload Value Update on going
- * Output : None
- * Return : The new state of IWDG_FLAG (SET or RESET).
- *******************************************************************************/
- FlagStatus IWDG_GetFlagStatus(u16 IWDG_FLAG)
- {
- FlagStatus bitstatus = RESET;
- /* Check the parameters */
- assert_param(IS_IWDG_FLAG(IWDG_FLAG));
- if ((IWDG->SR & IWDG_FLAG) != (u32)RESET)
- {
- bitstatus = SET;
- }
- else
- {
- bitstatus = RESET;
- }
- /* Return the flag status */
- return bitstatus;
- }
- /******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/