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| bfc108 | 1 | /** |
| Q | 2 | ****************************************************************************** |
| 3 | * @file stm32f0xx_hal_timebase_rtc_wakeup_template.c | |
| 4 | * @brief HAL time base based on the hardware RTC_WAKEUP Template. | |
| 5 | * | |
| 6 | * This file overrides the native HAL time base functions (defined as weak) | |
| 7 | * to use the RTC WAKEUP for the time base generation: | |
| 8 | * + Intializes the RTC peripheral and configures the wakeup timer to be | |
| 9 | * incremented each 1ms | |
| 10 | * + The wakeup feature is configured to assert an interrupt each 1ms | |
| 11 | * + HAL_IncTick is called inside the HAL_RTCEx_WakeUpTimerEventCallback | |
| 12 | * + HSE (default), LSE or LSI can be selected as RTC clock source | |
| 13 | @verbatim | |
| 14 | ============================================================================== | |
| 15 | ##### How to use this driver ##### | |
| 16 | ============================================================================== | |
| 17 | [..] | |
| 18 | This file must be copied to the application folder and modified as follows: | |
| 19 | (#) Rename it to 'stm32f0xx_hal_timebase_rtc_wakeup.c' | |
| 20 | (#) Add this file and the RTC HAL drivers to your project and uncomment | |
| 21 | HAL_RTC_MODULE_ENABLED define in stm32f0xx_hal_conf.h | |
| 22 | ||
| 23 | [..] | |
| 24 | (@) HAL RTC alarm and HAL RTC wakeup drivers can抰 be used with low power modes: | |
| 25 | The wake up capability of the RTC may be intrusive in case of prior low power mode | |
| 26 | configuration requiring different wake up sources. | |
| 27 | Application/Example behavior is no more guaranteed | |
| 28 | (@) The stm32f0xx_hal_timebase_tim use is recommended for the Applications/Examples | |
| 29 | requiring low power modes | |
| 30 | ||
| 31 | @endverbatim | |
| 32 | ****************************************************************************** | |
| 33 | * @attention | |
| 34 | * | |
| 35 | * <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2> | |
| 36 | * | |
| 37 | * Redistribution and use in source and binary forms, with or without modification, | |
| 38 | * are permitted provided that the following conditions are met: | |
| 39 | * 1. Redistributions of source code must retain the above copyright notice, | |
| 40 | * this list of conditions and the following disclaimer. | |
| 41 | * 2. Redistributions in binary form must reproduce the above copyright notice, | |
| 42 | * this list of conditions and the following disclaimer in the documentation | |
| 43 | * and/or other materials provided with the distribution. | |
| 44 | * 3. Neither the name of STMicroelectronics nor the names of its contributors | |
| 45 | * may be used to endorse or promote products derived from this software | |
| 46 | * without specific prior written permission. | |
| 47 | * | |
| 48 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
| 49 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 50 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 51 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
| 52 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 53 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
| 54 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
| 55 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
| 56 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 57 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 58 | * | |
| 59 | ****************************************************************************** | |
| 60 | */ | |
| 61 | ||
| 62 | /* Includes ------------------------------------------------------------------*/ | |
| 63 | #include "stm32f0xx_hal.h" | |
| 64 | /** @addtogroup STM32F0xx_HAL_Driver | |
| 65 | * @{ | |
| 66 | */ | |
| 67 | ||
| 68 | /** @defgroup HAL_TimeBase_RTC_WakeUp_Template HAL TimeBase RTC WakeUp Template | |
| 69 | * @{ | |
| 70 | */ | |
| 71 | ||
| 72 | /* Private typedef -----------------------------------------------------------*/ | |
| 73 | /* Private define ------------------------------------------------------------*/ | |
| 74 | ||
| 75 | /* Uncomment the line below to select the appropriate RTC Clock source for your application: | |
| 76 | + RTC_CLOCK_SOURCE_HSE: can be selected for applications requiring timing precision. | |
| 77 | + RTC_CLOCK_SOURCE_LSE: can be selected for applications with low constraint on timing | |
| 78 | precision. | |
| 79 | + RTC_CLOCK_SOURCE_LSI: can be selected for applications with low constraint on timing | |
| 80 | precision. | |
| 81 | */ | |
| 82 | #define RTC_CLOCK_SOURCE_HSE | |
| 83 | /* #define RTC_CLOCK_SOURCE_LSE */ | |
| 84 | /* #define RTC_CLOCK_SOURCE_LSI */ | |
| 85 | ||
| 86 | #if defined(RTC_CLOCK_SOURCE_HSE) | |
| 87 | #define RTC_ASYNCH_PREDIV 49U | |
| 88 | #define RTC_SYNCH_PREDIV 4U | |
| 89 | #elif defined(RTC_CLOCK_SOURCE_LSE) | |
| 90 | #define RTC_ASYNCH_PREDIV 0U | |
| 91 | #define RTC_SYNCH_PREDIV 31U | |
| 92 | #else /* CLOCK_SOURCE_LSI */ | |
| 93 | #define RTC_ASYNCH_PREDIV 0U | |
| 94 | #define RTC_SYNCH_PREDIV 39U | |
| 95 | #endif /* RTC_CLOCK_SOURCE_HSE */ | |
| 96 | ||
| 97 | /* Private macro -------------------------------------------------------------*/ | |
| 98 | /* Private variables ---------------------------------------------------------*/ | |
| 99 | RTC_HandleTypeDef hRTC_Handle; | |
| 100 | ||
| 101 | /* Private function prototypes -----------------------------------------------*/ | |
| 102 | void RTC_IRQHandler(void); | |
| 103 | ||
| 104 | /* Private functions ---------------------------------------------------------*/ | |
| 105 | ||
| 106 | /** | |
| 107 | * @brief This function configures the RTC_WKUP as a time base source. | |
| 108 | * The time source is configured to have 1ms time base with a dedicated | |
| 109 | * Tick interrupt priority. | |
| 110 | * Wakeup Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK | |
| 111 | = 1ms | |
| 112 | * Wakeup Time = WakeupTimebase * WakeUpCounter (0 + 1) | |
| 113 | = 1 ms | |
| 114 | * @note This function is called automatically at the beginning of program after | |
| 115 | * reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig(). | |
| 116 | * @param TickPriority Tick interrupt priority. | |
| 117 | * @retval HAL status | |
| 118 | */ | |
| 119 | HAL_StatusTypeDef HAL_InitTick (uint32_t TickPriority) | |
| 120 | { | |
| 121 | __IO uint32_t counter = 0U; | |
| 122 | ||
| 123 | RCC_OscInitTypeDef RCC_OscInitStruct; | |
| 124 | RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; | |
| 125 | ||
| 126 | #ifdef RTC_CLOCK_SOURCE_LSE | |
| 127 | /* Configue LSE as RTC clock soucre */ | |
| 128 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; | |
| 129 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; | |
| 130 | RCC_OscInitStruct.LSEState = RCC_LSE_ON; | |
| 131 | PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE; | |
| 132 | #elif defined (RTC_CLOCK_SOURCE_LSI) | |
| 133 | /* Configue LSI as RTC clock soucre */ | |
| 134 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI; | |
| 135 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; | |
| 136 | RCC_OscInitStruct.LSIState = RCC_LSI_ON; | |
| 137 | PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI; | |
| 138 | #elif defined (RTC_CLOCK_SOURCE_HSE) | |
| 139 | /* Configue HSE as RTC clock soucre */ | |
| 140 | RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; | |
| 141 | RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; | |
| 142 | RCC_OscInitStruct.HSEState = RCC_HSE_ON; | |
| 143 | PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_HSE_DIV32; | |
| 144 | #else | |
| 145 | #error Please select the RTC Clock source | |
| 146 | #endif /* RTC_CLOCK_SOURCE_LSE */ | |
| 147 | ||
| 148 | if(HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) | |
| 149 | { | |
| 150 | PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC; | |
| 151 | if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) == HAL_OK) | |
| 152 | { | |
| 153 | /* Enable RTC Clock */ | |
| 154 | __HAL_RCC_RTC_ENABLE(); | |
| 155 | /* The time base should be 1ms | |
| 156 | Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK | |
| 157 | HSE/32 as RTC clock and HSE 8MHz | |
| 158 | Time base = ((49 + 1) * (4 + 1)) / 250kHz | |
| 159 | = 1ms | |
| 160 | LSE as RTC clock | |
| 161 | Time base = ((31 + 1) * (0 + 1)) / 32.768Khz | |
| 162 | = ~1ms | |
| 163 | LSI as RTC clock | |
| 164 | Time base = ((39 + 1) * (0 + 1)) / 40Khz | |
| 165 | = 1ms | |
| 166 | */ | |
| 167 | hRTC_Handle.Instance = RTC; | |
| 168 | hRTC_Handle.Init.HourFormat = RTC_HOURFORMAT_24; | |
| 169 | hRTC_Handle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV; | |
| 170 | hRTC_Handle.Init.SynchPrediv = RTC_SYNCH_PREDIV; | |
| 171 | hRTC_Handle.Init.OutPut = RTC_OUTPUT_DISABLE; | |
| 172 | hRTC_Handle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; | |
| 173 | hRTC_Handle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; | |
| 174 | HAL_RTC_Init(&hRTC_Handle); | |
| 175 | ||
| 176 | /* Disable the write protection for RTC registers */ | |
| 177 | __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); | |
| 178 | ||
| 179 | /* Disable the Wake-up Timer */ | |
| 180 | __HAL_RTC_WAKEUPTIMER_DISABLE(&hRTC_Handle); | |
| 181 | ||
| 182 | /* In case of interrupt mode is used, the interrupt source must disabled */ | |
| 183 | __HAL_RTC_WAKEUPTIMER_DISABLE_IT(&hRTC_Handle,RTC_IT_WUT); | |
| 184 | ||
| 185 | /* Wait till RTC WUTWF flag is set */ | |
| 186 | while(__HAL_RTC_WAKEUPTIMER_GET_FLAG(&hRTC_Handle, RTC_FLAG_WUTWF) == RESET) | |
| 187 | { | |
| 188 | if(counter++ == (SystemCoreClock /48U)) | |
| 189 | { | |
| 190 | return HAL_ERROR; | |
| 191 | } | |
| 192 | } | |
| 193 | ||
| 194 | /* Clear PWR wake up Flag */ | |
| 195 | __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); | |
| 196 | ||
| 197 | /* Clear RTC Wake Up timer Flag */ | |
| 198 | __HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(&hRTC_Handle, RTC_FLAG_WUTF); | |
| 199 | ||
| 200 | /* Configure the Wake-up Timer counter */ | |
| 201 | hRTC_Handle.Instance->WUTR = 0U; | |
| 202 | ||
| 203 | /* Clear the Wake-up Timer clock source bits in CR register */ | |
| 204 | hRTC_Handle.Instance->CR &= (uint32_t)~RTC_CR_WUCKSEL; | |
| 205 | ||
| 206 | /* Configure the clock source */ | |
| 207 | hRTC_Handle.Instance->CR |= (uint32_t)RTC_WAKEUPCLOCK_CK_SPRE_16BITS; | |
| 208 | ||
| 209 | /* RTC WakeUpTimer Interrupt Configuration: EXTI configuration */ | |
| 210 | __HAL_RTC_WAKEUPTIMER_EXTI_ENABLE_IT(); | |
| 211 | ||
| 212 | __HAL_RTC_WAKEUPTIMER_EXTI_ENABLE_RISING_EDGE(); | |
| 213 | ||
| 214 | /* Configure the Interrupt in the RTC_CR register */ | |
| 215 | __HAL_RTC_WAKEUPTIMER_ENABLE_IT(&hRTC_Handle,RTC_IT_WUT); | |
| 216 | ||
| 217 | /* Enable the Wake-up Timer */ | |
| 218 | __HAL_RTC_WAKEUPTIMER_ENABLE(&hRTC_Handle); | |
| 219 | ||
| 220 | /* Enable the write protection for RTC registers */ | |
| 221 | __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); | |
| 222 | ||
| 223 | HAL_NVIC_SetPriority(RTC_IRQn, TickPriority, 0U); | |
| 224 | HAL_NVIC_EnableIRQ(RTC_IRQn); | |
| 225 | return HAL_OK; | |
| 226 | } | |
| 227 | } | |
| 228 | return HAL_ERROR; | |
| 229 | } | |
| 230 | ||
| 231 | /** | |
| 232 | * @brief Suspend Tick increment. | |
| 233 | * @note Disable the tick increment by disabling RTC_WKUP interrupt. | |
| 234 | * @param None | |
| 235 | * @retval None | |
| 236 | */ | |
| 237 | void HAL_SuspendTick(void) | |
| 238 | { | |
| 239 | /* Disable the write protection for RTC registers */ | |
| 240 | __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); | |
| 241 | /* Disable WAKE UP TIMER Interrupt */ | |
| 242 | __HAL_RTC_WAKEUPTIMER_DISABLE_IT(&hRTC_Handle, RTC_IT_WUT); | |
| 243 | /* Enable the write protection for RTC registers */ | |
| 244 | __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); | |
| 245 | } | |
| 246 | ||
| 247 | /** | |
| 248 | * @brief Resume Tick increment. | |
| 249 | * @note Enable the tick increment by Enabling RTC_WKUP interrupt. | |
| 250 | * @param None | |
| 251 | * @retval None | |
| 252 | */ | |
| 253 | void HAL_ResumeTick(void) | |
| 254 | { | |
| 255 | /* Disable the write protection for RTC registers */ | |
| 256 | __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); | |
| 257 | /* Enable WAKE UP TIMER interrupt */ | |
| 258 | __HAL_RTC_WAKEUPTIMER_ENABLE_IT(&hRTC_Handle, RTC_IT_WUT); | |
| 259 | /* Enable the write protection for RTC registers */ | |
| 260 | __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); | |
| 261 | } | |
| 262 | ||
| 263 | /** | |
| 264 | * @brief Wake Up Timer Event Callback in non blocking mode | |
| 265 | * @note This function is called when RTC_WKUP interrupt took place, inside | |
| 266 | * RTC_IRQHandler(). It makes a direct call to HAL_IncTick() to increment | |
| 267 | * a global variable "uwTick" used as application time base. | |
| 268 | * @param hrtc RTC handle | |
| 269 | * @retval None | |
| 270 | */ | |
| 271 | void HAL_RTCEx_WakeUpTimerEventCallback(RTC_HandleTypeDef *hrtc) | |
| 272 | { | |
| 273 | HAL_IncTick(); | |
| 274 | } | |
| 275 | ||
| 276 | /** | |
| 277 | * @brief This function handles WAKE UP TIMER interrupt request. | |
| 278 | * @param None | |
| 279 | * @retval None | |
| 280 | */ | |
| 281 | void RTC_IRQHandler(void) | |
| 282 | { | |
| 283 | HAL_RTCEx_WakeUpTimerIRQHandler(&hRTC_Handle); | |
| 284 | } | |
| 285 | ||
| 286 | /** | |
| 287 | * @} | |
| 288 | */ | |
| 289 | ||
| 290 | /** | |
| 291 | * @} | |
| 292 | */ | |
| 293 | ||
| 294 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ | |
