/******************** (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****/ |