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authorBert Lange <b.lange@fzd.de>2011-11-07 15:41:50 +0100
committerBert Lange <b.lange@fzd.de>2011-11-07 15:41:50 +0100
commitd190f1c37139ec38667a3d6e566dbe1b0549f84d (patch)
tree7885f39318cb7852afc24992dd08cb6bb953ac03 /uc_str912/prj_blinky_simple_startup/str91x_lib/src/91x_wdg.c
parentacc2681723f43b3c8ccb29055bec9d63cb863c78 (diff)
downloadzpu-d190f1c37139ec38667a3d6e566dbe1b0549f84d.zip
zpu-d190f1c37139ec38667a3d6e566dbe1b0549f84d.tar.gz
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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 WDGs 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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