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authorOxore <oxore@protonmail.com>2023-03-05 20:20:45 +0300
committerOxore <oxore@protonmail.com>2023-03-05 20:20:45 +0300
commitea807de65b0485ac58b6eae576209c64d4d5c4e9 (patch)
treeb4264d20e1d700cfd9e0ece9d847a825dd1dfc03 /Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_iwdg.c
parentdd01e7ed22cea652061f0d12cecf929e04b285e9 (diff)
Split app code and third party libraries
Diffstat (limited to 'Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_iwdg.c')
-rw-r--r--Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_iwdg.c293
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diff --git a/Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_iwdg.c b/Libraries/STM32F0xx_StdPeriph_Driver/src/stm32f0xx_iwdg.c
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-/**
- ******************************************************************************
- * @file stm32f0xx_iwdg.c
- * @author MCD Application Team
- * @version V1.3.0
- * @date 16-January-2014
- * @brief This file provides firmware functions to manage the following
- * functionalities of the Independent watchdog (IWDG) peripheral:
- * + Prescaler and Counter configuration
- * + IWDG activation
- * + Flag management
- *
- * @verbatim
- *
- ==============================================================================
- ##### IWDG features #####
- ==============================================================================
- [..] The IWDG can be started by either software or hardware (configurable
- through option byte).
-
- [..] The IWDG is clocked by its own dedicated low-speed clock (LSI) and
- thus stays active even if the main clock fails.
- Once the IWDG is started, the LSI is forced ON and cannot be disabled
- (LSI cannot be disabled too), and the counter starts counting down from
- the reset value of 0xFFF. When it reaches the end of count value (0x000)
- a system reset is generated.
- The IWDG counter should be reloaded at regular intervals to prevent
- an MCU reset.
-
- [..] The IWDG is implemented in the VDD voltage domain that is still functional
- in STOP and STANDBY mode (IWDG reset can wake-up from STANDBY).
-
- [..] IWDGRST flag in RCC_CSR register can be used to inform when a IWDG
- reset occurs.
-
- [..] Min-max timeout value @40KHz (LSI): ~0.1ms / ~28.3s
- The IWDG timeout may vary due to LSI frequency dispersion. STM32F0xx
- devices provide the capability to measure the LSI frequency (LSI clock
- should be seleted as RTC clock which is internally connected to TIM10 CH1
- input capture). The measured value can be used to have an IWDG timeout with
- an acceptable accuracy.
- For more information, please refer to the STM32F0xx Reference manual.
-
- ##### How to use this driver #####
- ==============================================================================
- [..] This driver allows to use IWDG peripheral with either window option enabled
- or disabled. To do so follow one of the two procedures below.
- (#) Window option is enabled:
- (++) Start the IWDG using IWDG_Enable() function, when the IWDG is used
- in software mode (no need to enable the LSI, it will be enabled
- by hardware).
- (++) Enable write access to IWDG_PR and IWDG_RLR registers using
- IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable) function.
- (++) Configure the IWDG prescaler using IWDG_SetPrescaler() function.
- (++) Configure the IWDG counter value using IWDG_SetReload() function.
- This value will be loaded in the IWDG counter each time the counter
- is reloaded, then the IWDG will start counting down from this value.
- (++) Wait for the IWDG registers to be updated using IWDG_GetFlagStatus() function.
- (++) Configure the IWDG refresh window using IWDG_SetWindowValue() function.
-
- (#) Window option is disabled:
- (++) Enable write access to IWDG_PR and IWDG_RLR registers using
- IWDG_WriteAccessCmd(IWDG_WriteAccess_Enable) function.
- (++) Configure the IWDG prescaler using IWDG_SetPrescaler() function.
- (++) Configure the IWDG counter value using IWDG_SetReload() function.
- This value will be loaded in the IWDG counter each time the counter
- is reloaded, then the IWDG will start counting down from this value.
- (++) Wait for the IWDG registers to be updated using IWDG_GetFlagStatus() function.
- (++) reload the IWDG counter at regular intervals during normal operation
- to prevent an MCU reset, using IWDG_ReloadCounter() function.
- (++) Start the IWDG using IWDG_Enable() function, when the IWDG is used
- in software mode (no need to enable the LSI, it will be enabled
- by hardware).
-
- @endverbatim
- *
- ******************************************************************************
- * @attention
- *
- * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
- *
- * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
- * You may not use this file except in compliance with the License.
- * You may obtain a copy of the License at:
- *
- * http://www.st.com/software_license_agreement_liberty_v2
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- ******************************************************************************
- */
-
-/* Includes ------------------------------------------------------------------*/
-#include "stm32f0xx_iwdg.h"
-
-/** @addtogroup STM32F0xx_StdPeriph_Driver
- * @{
- */
-
-/** @defgroup IWDG
- * @brief IWDG driver modules
- * @{
- */
-
-/* Private typedef -----------------------------------------------------------*/
-/* Private define ------------------------------------------------------------*/
-/* ---------------------- IWDG registers bit mask ----------------------------*/
-/* KR register bit mask */
-#define KR_KEY_RELOAD ((uint16_t)0xAAAA)
-#define KR_KEY_ENABLE ((uint16_t)0xCCCC)
-
-/* Private macro -------------------------------------------------------------*/
-/* Private variables ---------------------------------------------------------*/
-/* Private function prototypes -----------------------------------------------*/
-/* Private functions ---------------------------------------------------------*/
-
-/** @defgroup IWDG_Private_Functions
- * @{
- */
-
-/** @defgroup IWDG_Group1 Prescaler and Counter configuration functions
- * @brief Prescaler and Counter configuration functions
- *
-@verbatim
- ==============================================================================
- ##### Prescaler and Counter configuration functions #####
- ==============================================================================
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables or disables write access to IWDG_PR and IWDG_RLR registers.
- * @param IWDG_WriteAccess: new state of write access to IWDG_PR and IWDG_RLR registers.
- * This parameter can be one of the following values:
- * @arg IWDG_WriteAccess_Enable: Enable write access to IWDG_PR and IWDG_RLR registers
- * @arg IWDG_WriteAccess_Disable: Disable write access to IWDG_PR and IWDG_RLR registers
- * @retval None
- */
-void IWDG_WriteAccessCmd(uint16_t IWDG_WriteAccess)
-{
- /* Check the parameters */
- assert_param(IS_IWDG_WRITE_ACCESS(IWDG_WriteAccess));
- IWDG->KR = IWDG_WriteAccess;
-}
-
-/**
- * @brief Sets IWDG Prescaler value.
- * @param IWDG_Prescaler: specifies the IWDG Prescaler value.
- * This parameter can be one of the following values:
- * @arg IWDG_Prescaler_4: IWDG prescaler set to 4
- * @arg IWDG_Prescaler_8: IWDG prescaler set to 8
- * @arg IWDG_Prescaler_16: IWDG prescaler set to 16
- * @arg IWDG_Prescaler_32: IWDG prescaler set to 32
- * @arg IWDG_Prescaler_64: IWDG prescaler set to 64
- * @arg IWDG_Prescaler_128: IWDG prescaler set to 128
- * @arg IWDG_Prescaler_256: IWDG prescaler set to 256
- * @retval None
- */
-void IWDG_SetPrescaler(uint8_t IWDG_Prescaler)
-{
- /* Check the parameters */
- assert_param(IS_IWDG_PRESCALER(IWDG_Prescaler));
- IWDG->PR = IWDG_Prescaler;
-}
-
-/**
- * @brief Sets IWDG Reload value.
- * @param Reload: specifies the IWDG Reload value.
- * This parameter must be a number between 0 and 0x0FFF.
- * @retval None
- */
-void IWDG_SetReload(uint16_t Reload)
-{
- /* Check the parameters */
- assert_param(IS_IWDG_RELOAD(Reload));
- IWDG->RLR = Reload;
-}
-
-/**
- * @brief Reloads IWDG counter with value defined in the reload register
- * (write access to IWDG_PR and IWDG_RLR registers disabled).
- * @param None
- * @retval None
- */
-void IWDG_ReloadCounter(void)
-{
- IWDG->KR = KR_KEY_RELOAD;
-}
-
-
-/**
- * @brief Sets the IWDG window value.
- * @param WindowValue: specifies the window value to be compared to the downcounter.
- * @retval None
- */
-void IWDG_SetWindowValue(uint16_t WindowValue)
-{
- /* Check the parameters */
- assert_param(IS_IWDG_WINDOW_VALUE(WindowValue));
- IWDG->WINR = WindowValue;
-}
-
-/**
- * @}
- */
-
-/** @defgroup IWDG_Group2 IWDG activation function
- * @brief IWDG activation function
- *
-@verbatim
- ==============================================================================
- ##### IWDG activation function #####
- ==============================================================================
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Enables IWDG (write access to IWDG_PR and IWDG_RLR registers disabled).
- * @param None
- * @retval None
- */
-void IWDG_Enable(void)
-{
- IWDG->KR = KR_KEY_ENABLE;
-}
-
-/**
- * @}
- */
-
-/** @defgroup IWDG_Group3 Flag management function
- * @brief Flag management function
- *
-@verbatim
- ===============================================================================
- ##### Flag management function #####
- ===============================================================================
-
-@endverbatim
- * @{
- */
-
-/**
- * @brief Checks whether the specified IWDG flag is set or not.
- * @param IWDG_FLAG: specifies the flag to check.
- * This parameter can be one of the following values:
- * @arg IWDG_FLAG_PVU: Prescaler Value Update on going
- * @arg IWDG_FLAG_RVU: Reload Value Update on going
- * @arg IWDG_FLAG_WVU: Counter Window Value Update on going
- * @retval The new state of IWDG_FLAG (SET or RESET).
- */
-FlagStatus IWDG_GetFlagStatus(uint16_t IWDG_FLAG)
-{
- FlagStatus bitstatus = RESET;
- /* Check the parameters */
- assert_param(IS_IWDG_FLAG(IWDG_FLAG));
- if ((IWDG->SR & IWDG_FLAG) != (uint32_t)RESET)
- {
- bitstatus = SET;
- }
- else
- {
- bitstatus = RESET;
- }
- /* Return the flag status */
- return bitstatus;
-}
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/**
- * @}
- */
-
-/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/