mbed library sources modified for open wear
Dependents: openwear-lifelogger-example
Fork of mbed-src by
targets/cmsis/TARGET_STM/TARGET_NUCLEO_F103RB/stm32f10x_wwdg.c
- Committer:
- mbed_official
- Date:
- 2013-12-02
- Revision:
- 52:a51c77007319
- Child:
- 70:c1fbde68b492
File content as of revision 52:a51c77007319:
/** ****************************************************************************** * @file stm32f10x_wwdg.c * @author MCD Application Team * @version V3.5.0 * @date 11-March-2011 * @brief This file provides all the WWDG firmware functions. ****************************************************************************** * @attention * * 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. * * <h2><center>© COPYRIGHT 2011 STMicroelectronics</center></h2> ****************************************************************************** */ /* Includes ------------------------------------------------------------------*/ #include "stm32f10x_wwdg.h" #include "stm32f10x_rcc.h" /** @addtogroup STM32F10x_StdPeriph_Driver * @{ */ /** @defgroup WWDG * @brief WWDG driver modules * @{ */ /** @defgroup WWDG_Private_TypesDefinitions * @{ */ /** * @} */ /** @defgroup WWDG_Private_Defines * @{ */ /* ----------- 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 ((uint32_t)0x00000080) /* CFR register bit mask */ #define CFR_WDGTB_Mask ((uint32_t)0xFFFFFE7F) #define CFR_W_Mask ((uint32_t)0xFFFFFF80) #define BIT_Mask ((uint8_t)0x7F) /** * @} */ /** @defgroup WWDG_Private_Macros * @{ */ /** * @} */ /** @defgroup WWDG_Private_Variables * @{ */ /** * @} */ /** @defgroup WWDG_Private_FunctionPrototypes * @{ */ /** * @} */ /** @defgroup WWDG_Private_Functions * @{ */ /** * @brief Deinitializes the WWDG peripheral registers to their default reset values. * @param None * @retval None */ void WWDG_DeInit(void) { RCC_APB1PeriphResetCmd(RCC_APB1Periph_WWDG, ENABLE); RCC_APB1PeriphResetCmd(RCC_APB1Periph_WWDG, DISABLE); } /** * @brief Sets the WWDG Prescaler. * @param WWDG_Prescaler: specifies the WWDG Prescaler. * This parameter can be one of the following values: * @arg WWDG_Prescaler_1: WWDG counter clock = (PCLK1/4096)/1 * @arg WWDG_Prescaler_2: WWDG counter clock = (PCLK1/4096)/2 * @arg WWDG_Prescaler_4: WWDG counter clock = (PCLK1/4096)/4 * @arg WWDG_Prescaler_8: WWDG counter clock = (PCLK1/4096)/8 * @retval None */ void WWDG_SetPrescaler(uint32_t WWDG_Prescaler) { uint32_t 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; } /** * @brief Sets the WWDG window value. * @param WindowValue: specifies the window value to be compared to the downcounter. * This parameter value must be lower than 0x80. * @retval None */ void WWDG_SetWindowValue(uint8_t WindowValue) { __IO uint32_t 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 & (uint32_t) BIT_Mask; /* Store the new value */ WWDG->CFR = tmpreg; } /** * @brief Enables the WWDG Early Wakeup interrupt(EWI). * @param None * @retval None */ void WWDG_EnableIT(void) { *(__IO uint32_t *) CFR_EWI_BB = (uint32_t)ENABLE; } /** * @brief Sets the WWDG counter value. * @param Counter: specifies the watchdog counter value. * This parameter must be a number between 0x40 and 0x7F. * @retval None */ void WWDG_SetCounter(uint8_t 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; } /** * @brief Enables WWDG and load the counter value. * @param Counter: specifies the watchdog counter value. * This parameter must be a number between 0x40 and 0x7F. * @retval None */ void WWDG_Enable(uint8_t Counter) { /* Check the parameters */ assert_param(IS_WWDG_COUNTER(Counter)); WWDG->CR = CR_WDGA_Set | Counter; } /** * @brief Checks whether the Early Wakeup interrupt flag is set or not. * @param None * @retval The new state of the Early Wakeup interrupt flag (SET or RESET) */ FlagStatus WWDG_GetFlagStatus(void) { return (FlagStatus)(WWDG->SR); } /** * @brief Clears Early Wakeup interrupt flag. * @param None * @retval None */ void WWDG_ClearFlag(void) { WWDG->SR = (uint32_t)RESET; } /** * @} */ /** * @} */ /** * @} */ /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/