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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [CORTEX_STM32F103_IAR/] [STM32F10xFWLib/] [src/] [stm32f10x_iwdg.c] - Rev 603
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/******************** (C) COPYRIGHT 2007 STMicroelectronics ******************** * File Name : stm32f10x_iwdg.c * Author : MCD Application Team * Date First Issued : 09/29/2006 * Description : This file provides all the IWDG firmware functions. ******************************************************************************** * History: * 04/02/2007: V0.2 * 02/05/2007: V0.1 * 09/29/2006: V0.01 ******************************************************************************** * THE PRESENT SOFTWARE 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 SOFTWARE 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_Reload ((u16)0xAAAA) #define KR_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(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(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(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_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_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(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 2007 STMicroelectronics *****END OF FILE****/
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