diff options
Diffstat (limited to 'stm32lib/src/stm32f10x_iwdg.c')
| -rw-r--r-- | stm32lib/src/stm32f10x_iwdg.c | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/stm32lib/src/stm32f10x_iwdg.c b/stm32lib/src/stm32f10x_iwdg.c new file mode 100644 index 0000000..77cb094 --- /dev/null +++ b/stm32lib/src/stm32f10x_iwdg.c @@ -0,0 +1,148 @@ +/******************** (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****/
|