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[/] [openrisc/] [trunk/] [rtos/] [freertos-6.1.1/] [Demo/] [ARM9_STR91X_IAR/] [Library/] [source/] [91x_wdg.c] - Rev 613
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/******************** (C) COPYRIGHT 2006 STMicroelectronics ******************** * File Name : 91x_wdg.c * Author : MCD Application Team * Date First Issued : 05/18/2006 : Version 1.0 * Description : This file provides all the WDG software functions. ******************************************************************************** * History: * 05/24/2006 : Version 1.1 * 05/18/2006 : Version 1.0 ******************************************************************************** * 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 "91x_wdg.h" #include "91x_scu.h" /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* WDG End of Count interrupt Flag */ #define WDG_FLAG_EC 0x0001 /* WDG End of Count interrupt request */ #define WDG_IT_EC 0x0001 /* WDG Start/Stop counter */ #define WDG_Counter_Start 0x0002 #define WDG_Counter_Stop 0xFFFD /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Registers reset value */ /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /****************************************************************************** * Function Name : WDG_DeInit * Description : Deinitializes the WDG peripheral registers to their default * reset values. * Input : None * Output : None * Return : None *******************************************************************************/ void WDG_DeInit(void) { SCU_APBPeriphReset(__WDG, ENABLE); /*WDG peripheral under Reset */ SCU_APBPeriphReset(__WDG, DISABLE); /*WDG peripheral Reset off*/ } /******************************************************************************* * Function Name : WDG_StructInit * Description : Fills the WDG_InitTypeDef structure member with its reset * value. * Input : WDG_InitStruct : pointer to a WDG_InitTypeDef structure * which will be initialized. * Output : None * Return : None *******************************************************************************/ void WDG_StructInit(WDG_InitTypeDef *WDG_InitStruct) { /* Select the Watchdog running mode*/ WDG_InitStruct->WDG_Mode = WDG_Mode_Timer; /* Select the source clock */ WDG_InitStruct-> WDG_ClockSource = WDG_ClockSource_Apb; /* Initialize Prescaler */ WDG_InitStruct->WDG_Prescaler =0xFF; /* Initialize Preload */ WDG_InitStruct->WDG_Preload =0xFFFF; } /******************************************************************************* * Function Name : WDG_Init * Description : Initializes WDG peripheral according to the specified * parameters in the WDG_InitStruct. * Input : WDG_InitStruct: pointer to a WDG_InitTypeDef structure that * contains the configuration information for the WDG peripheral. * Output : None * Return : None *******************************************************************************/ void WDG_Init(WDG_InitTypeDef* WDG_InitStruct) { if(WDG_InitStruct->WDG_ClockSource == WDG_ClockSource_Apb) { /* Select The APB clock as clock source */ WDG->CR &= WDG_ClockSource_Apb; } else { /* Select the RTC clock as source */ WDG->CR |= WDG_ClockSource_Rtc ; } /* Configure WDG Prescaler register value */ WDG->PR = WDG_InitStruct->WDG_Prescaler; /* Configure WDG Pre-load register value */ WDG->VR = WDG_InitStruct->WDG_Preload ; if(WDG_InitStruct->WDG_Mode == WDG_Mode_Timer) { /* Select Timer mode */ WDG->CR &= WDG_Mode_Timer; } else { /* Select WDG mode */ WDG->CR |= WDG_Mode_Wdg ; } } /******************************************************************************* * Function Name : WDG_Cmd * Description : Enables or disables the WDG peripheral. * Input : NewState: new state of the WDG peripheral (Newstate can be * ENABLE or DISABLE) * Output : None * Return : None *******************************************************************************/ void WDG_Cmd(FunctionalState NewState ) { if((WDG->CR & WDG_Mode_Wdg) == 0) { /* Timer mode */ if(NewState == ENABLE) { /* Start timer by setting SC bit in Control register */ WDG->CR |= WDG_Counter_Start; } else { /* Stop timer by clearning SC bit in Control register */ WDG->CR &= WDG_Counter_Stop; } } else { /* Watchdog mode */ if(NewState == ENABLE) { WDG->KR = WDG_KeyValue1; WDG->KR = WDG_KeyValue2; } } } /******************************************************************************* * Function Name : WDG_ITConfig * Description : Enables or disables the WDG End of Count(EC) interrupt. * Input : Newstate: new state of the End of Count(EC) WDG interrupt. * This parameter can be: ENABLE or DISABLE. * Output : None * Return : None *******************************************************************************/ void WDG_ITConfig(FunctionalState NewState) { if(NewState == ENABLE) { /* Enable the End of Count interrupt */ WDG->MR |= WDG_IT_EC; } else { /* Disable the End of Count interrupt */ WDG->MR &= ~WDG_IT_EC; } } /******************************************************************************* * Function Name : WDG_GetCounter * Description : Gets the WDG’s current counter value. * Input : None * Output : None * Return : The WDG current counter value *******************************************************************************/ u16 WDG_GetCounter(void) { return WDG->CNT; } /******************************************************************************* * Function Name : WDG_GetITStatus * Description : Checks whether the WDG End of Count(EC) interrupt is occured or not. * Input : None * Output : None * Return : The new state of WDG_IT (SET or RESET). *******************************************************************************/ ITStatus WDG_GetITStatus(void) { if(((WDG->SR & WDG_IT_EC) != RESET )&&((WDG->MR & WDG_IT_EC) != RESET )) { return SET; } else { return RESET; } } /******************************************************************************* * Function Name : WDG_ClearITPendingBit * Description : Clears the WDG's End of Count(EC) interrupt pending bit. * Input : None * Output : None * Return : None *******************************************************************************/ void WDG_ClearITPendingBit(void) { /* Clear the EC pending bit */ WDG->SR &= ~WDG_IT_EC; } /******************************************************************************* * Function Name : WDG_ClearFlag * Description : Clears the WDG's End of Count(EC) Flag. * Input : None * Output : None * Return : None *******************************************************************************/ void WDG_ClearFlag(void) { /* Clear the EC Flag */ WDG->SR &= ~WDG_FLAG_EC; } /******************************************************************************* * Function Name : WDG_GetFlagStatus * Description : Checks whether the WDG End of Count(EC) flag is set or not. * Input : None * Output : None * Return : The new state of the WDG_FLAG (SET or RESET). *******************************************************************************/ FlagStatus WDG_GetFlagStatus(void) { if((WDG->SR & WDG_FLAG_EC) != RESET ) { return SET; } else { return RESET; } } /******************* (C) COPYRIGHT 2006 STMicroelectronics *****END OF FILE****/
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