diff options
Diffstat (limited to 'stm32lib/src/stm32f10x_wwdg.c')
| -rw-r--r-- | stm32lib/src/stm32f10x_wwdg.c | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/stm32lib/src/stm32f10x_wwdg.c b/stm32lib/src/stm32f10x_wwdg.c new file mode 100644 index 0000000..ac9882f --- /dev/null +++ b/stm32lib/src/stm32f10x_wwdg.c @@ -0,0 +1,185 @@ +/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
+* File Name : stm32f10x_wwdg.c
+* Author : MCD Application Team
+* Version : V2.0.2
+* Date : 07/11/2008
+* Description : This file provides all the WWDG 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_wwdg.h"
+#include "stm32f10x_rcc.h"
+
+/* Private typedef -----------------------------------------------------------*/
+/* Private define ------------------------------------------------------------*/
+/* ----------- WWDG registers bit address in the alias region ----------- */
+#define WWDG_OFFSET (WWDG_BASE - PERIPH_BASE)
+
+/* Alias word address of EWI bit */
+#define CFR_OFFSET (WWDG_OFFSET + 0x04)
+#define EWI_BitNumber 0x09
+#define CFR_EWI_BB (PERIPH_BB_BASE + (CFR_OFFSET * 32) + (EWI_BitNumber * 4))
+
+/* --------------------- WWDG registers bit mask ------------------------ */
+/* CR register bit mask */
+#define CR_WDGA_Set ((u32)0x00000080)
+
+/* CFR register bit mask */
+#define CFR_WDGTB_Mask ((u32)0xFFFFFE7F)
+#define CFR_W_Mask ((u32)0xFFFFFF80)
+
+#define BIT_Mask ((u8)0x7F)
+
+/* Private macro -------------------------------------------------------------*/
+/* Private variables ---------------------------------------------------------*/
+/* Private function prototypes -----------------------------------------------*/
+/* Private functions ---------------------------------------------------------*/
+
+/*******************************************************************************
+* Function Name : WWDG_DeInit
+* Description : Deinitializes the WWDG peripheral registers to their default
+* reset values.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void WWDG_DeInit(void)
+{
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_WWDG, ENABLE);
+ RCC_APB1PeriphResetCmd(RCC_APB1Periph_WWDG, DISABLE);
+}
+
+/*******************************************************************************
+* Function Name : WWDG_SetPrescaler
+* Description : Sets the WWDG Prescaler.
+* Input : - WWDG_Prescaler: specifies the WWDG Prescaler.
+* This parameter can be one of the following values:
+* - WWDG_Prescaler_1: WWDG counter clock = (PCLK1/4096)/1
+* - WWDG_Prescaler_2: WWDG counter clock = (PCLK1/4096)/2
+* - WWDG_Prescaler_4: WWDG counter clock = (PCLK1/4096)/4
+* - WWDG_Prescaler_8: WWDG counter clock = (PCLK1/4096)/8
+* Output : None
+* Return : None
+*******************************************************************************/
+void WWDG_SetPrescaler(u32 WWDG_Prescaler)
+{
+ u32 tmpreg = 0;
+
+ /* Check the parameters */
+ assert_param(IS_WWDG_PRESCALER(WWDG_Prescaler));
+
+ /* Clear WDGTB[1:0] bits */
+ tmpreg = WWDG->CFR & CFR_WDGTB_Mask;
+
+ /* Set WDGTB[1:0] bits according to WWDG_Prescaler value */
+ tmpreg |= WWDG_Prescaler;
+
+ /* Store the new value */
+ WWDG->CFR = tmpreg;
+}
+
+/*******************************************************************************
+* Function Name : WWDG_SetWindowValue
+* Description : Sets the WWDG window value.
+* Input : - WindowValue: specifies the window value to be compared to
+* the downcounter.
+* This parameter value must be lower than 0x80.
+* Output : None
+* Return : None
+*******************************************************************************/
+void WWDG_SetWindowValue(u8 WindowValue)
+{
+ u32 tmpreg = 0;
+
+ /* Check the parameters */
+ assert_param(IS_WWDG_WINDOW_VALUE(WindowValue));
+
+ /* Clear W[6:0] bits */
+ tmpreg = WWDG->CFR & CFR_W_Mask;
+
+ /* Set W[6:0] bits according to WindowValue value */
+ tmpreg |= WindowValue & BIT_Mask;
+
+ /* Store the new value */
+ WWDG->CFR = tmpreg;
+}
+
+/*******************************************************************************
+* Function Name : WWDG_EnableIT
+* Description : Enables the WWDG Early Wakeup interrupt(EWI).
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void WWDG_EnableIT(void)
+{
+ *(vu32 *) CFR_EWI_BB = (u32)ENABLE;
+}
+
+/*******************************************************************************
+* Function Name : WWDG_SetCounter
+* Description : Sets the WWDG counter value.
+* Input : - Counter: specifies the watchdog counter value.
+* This parameter must be a number between 0x40 and 0x7F.
+* Output : None
+* Return : None
+*******************************************************************************/
+void WWDG_SetCounter(u8 Counter)
+{
+ /* Check the parameters */
+ assert_param(IS_WWDG_COUNTER(Counter));
+
+ /* Write to T[6:0] bits to configure the counter value, no need to do
+ a read-modify-write; writing a 0 to WDGA bit does nothing */
+ WWDG->CR = Counter & BIT_Mask;
+}
+
+/*******************************************************************************
+* Function Name : WWDG_Enable
+* Description : Enables WWDG and load the counter value.
+* - Counter: specifies the watchdog counter value.
+* This parameter must be a number between 0x40 and 0x7F.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void WWDG_Enable(u8 Counter)
+{
+ /* Check the parameters */
+ assert_param(IS_WWDG_COUNTER(Counter));
+
+ WWDG->CR = CR_WDGA_Set | Counter;
+}
+
+/*******************************************************************************
+* Function Name : WWDG_GetFlagStatus
+* Description : Checks whether the Early Wakeup interrupt flag is set or not.
+* Input : None
+* Output : None
+* Return : The new state of the Early Wakeup interrupt flag (SET or RESET)
+*******************************************************************************/
+FlagStatus WWDG_GetFlagStatus(void)
+{
+ return (FlagStatus)(WWDG->SR);
+}
+
+/*******************************************************************************
+* Function Name : WWDG_ClearFlag
+* Description : Clears Early Wakeup interrupt flag.
+* Input : None
+* Output : None
+* Return : None
+*******************************************************************************/
+void WWDG_ClearFlag(void)
+{
+ WWDG->SR = (u32)RESET;
+}
+
+/******************* (C) COPYRIGHT 2008 STMicroelectronics *****END OF FILE****/
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