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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_timebase_rtc_wakeup_template.c @ 441:9a9e4908ce2e
fix potential issue with >255 dives in the logbook
author | heinrichsweikamp |
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date | Sun, 01 Mar 2020 10:06:45 +0100 |
parents | c78bcbd5deda |
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rev | line source |
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128
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1 /** |
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2 ****************************************************************************** |
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3 * @file stm32f4xx_hal_timebase_rtc_wakeup_template.c |
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4 * @author MCD Application Team |
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5 * @brief HAL time base based on the hardware RTC_WAKEUP Template. |
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6 * |
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7 * This file overrides the native HAL time base functions (defined as weak) |
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8 * to use the RTC WAKEUP for the time base generation: |
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9 * + Intializes the RTC peripheral and configures the wakeup timer to be |
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10 * incremented each 1ms |
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11 * + The wakeup feature is configured to assert an interrupt each 1ms |
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12 * + HAL_IncTick is called inside the HAL_RTCEx_WakeUpTimerEventCallback |
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13 * + HSE (default), LSE or LSI can be selected as RTC clock source |
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14 @verbatim |
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15 ============================================================================== |
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16 ##### How to use this driver ##### |
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17 ============================================================================== |
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18 [..] |
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19 This file must be copied to the application folder and modified as follows: |
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20 (#) Rename it to 'stm32f4xx_hal_timebase_rtc_wakeup.c' |
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21 (#) Add this file and the RTC HAL drivers to your project and uncomment |
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22 HAL_RTC_MODULE_ENABLED define in stm32f4xx_hal_conf.h |
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23 |
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24 [..] |
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25 (@) HAL RTC alarm and HAL RTC wakeup drivers can’t be used with low power modes: |
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26 The wake up capability of the RTC may be intrusive in case of prior low power mode |
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27 configuration requiring different wake up sources. |
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28 Application/Example behavior is no more guaranteed |
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29 (@) The stm32f4xx_hal_timebase_tim use is recommended for the Applications/Examples |
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30 requiring low power modes |
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31 |
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32 @endverbatim |
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33 ****************************************************************************** |
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34 * @attention |
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35 * |
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36 * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2> |
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37 * |
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38 * Redistribution and use in source and binary forms, with or without modification, |
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39 * are permitted provided that the following conditions are met: |
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40 * 1. Redistributions of source code must retain the above copyright notice, |
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41 * this list of conditions and the following disclaimer. |
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42 * 2. Redistributions in binary form must reproduce the above copyright notice, |
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43 * this list of conditions and the following disclaimer in the documentation |
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44 * and/or other materials provided with the distribution. |
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45 * 3. Neither the name of STMicroelectronics nor the names of its contributors |
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46 * may be used to endorse or promote products derived from this software |
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47 * without specific prior written permission. |
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48 * |
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49 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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50 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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51 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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52 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
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53 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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54 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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55 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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56 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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57 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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58 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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59 * |
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60 ****************************************************************************** |
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61 */ |
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62 |
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63 /* Includes ------------------------------------------------------------------*/ |
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64 #include "stm32f4xx_hal.h" |
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65 /** @addtogroup STM32F4xx_HAL_Driver |
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66 * @{ |
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67 */ |
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68 |
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69 /** @defgroup HAL_TimeBase_RTC_WakeUp_Template HAL TimeBase RTC WakeUp Template |
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70 * @{ |
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71 */ |
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72 |
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73 /* Private typedef -----------------------------------------------------------*/ |
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74 /* Private define ------------------------------------------------------------*/ |
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75 |
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76 /* Uncomment the line below to select the appropriate RTC Clock source for your application: |
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77 + RTC_CLOCK_SOURCE_HSE: can be selected for applications requiring timing precision. |
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78 + RTC_CLOCK_SOURCE_LSE: can be selected for applications with low constraint on timing |
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79 precision. |
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80 + RTC_CLOCK_SOURCE_LSI: can be selected for applications with low constraint on timing |
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81 precision. |
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82 */ |
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83 #define RTC_CLOCK_SOURCE_HSE |
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84 /* #define RTC_CLOCK_SOURCE_LSE */ |
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85 /* #define RTC_CLOCK_SOURCE_LSI */ |
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86 |
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87 #ifdef RTC_CLOCK_SOURCE_HSE |
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88 #define RTC_ASYNCH_PREDIV 99U |
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89 #define RTC_SYNCH_PREDIV 9U |
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90 #define RCC_RTCCLKSOURCE_1MHZ ((uint32_t)((uint32_t)RCC_BDCR_RTCSEL | (uint32_t)((HSE_VALUE/1000000U) << 16U))) |
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91 #else /* RTC_CLOCK_SOURCE_LSE || RTC_CLOCK_SOURCE_LSI */ |
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92 #define RTC_ASYNCH_PREDIV 0U |
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93 #define RTC_SYNCH_PREDIV 31U |
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94 #endif /* RTC_CLOCK_SOURCE_HSE */ |
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95 |
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96 /* Private macro -------------------------------------------------------------*/ |
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97 /* Private variables ---------------------------------------------------------*/ |
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98 RTC_HandleTypeDef hRTC_Handle; |
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99 |
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100 /* Private function prototypes -----------------------------------------------*/ |
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101 void RTC_WKUP_IRQHandler(void); |
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102 |
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103 /* Private functions ---------------------------------------------------------*/ |
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104 |
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105 /** |
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106 * @brief This function configures the RTC_WKUP as a time base source. |
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107 * The time source is configured to have 1ms time base with a dedicated |
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108 * Tick interrupt priority. |
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109 * Wakeup Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK |
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110 = 1ms |
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111 * Wakeup Time = WakeupTimebase * WakeUpCounter (0 + 1) |
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112 = 1 ms |
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113 * @note This function is called automatically at the beginning of program after |
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114 * reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig(). |
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115 * @param TickPriority Tick interrupt priority. |
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116 * @retval HAL status |
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117 */ |
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118 HAL_StatusTypeDef HAL_InitTick (uint32_t TickPriority) |
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119 { |
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120 __IO uint32_t counter = 0U; |
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121 |
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122 RCC_OscInitTypeDef RCC_OscInitStruct; |
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123 RCC_PeriphCLKInitTypeDef PeriphClkInitStruct; |
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124 |
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125 #ifdef RTC_CLOCK_SOURCE_LSE |
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126 /* Configue LSE as RTC clock soucre */ |
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127 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE; |
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128 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
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129 RCC_OscInitStruct.LSEState = RCC_LSE_ON; |
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130 PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE; |
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131 #elif defined (RTC_CLOCK_SOURCE_LSI) |
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132 /* Configue LSI as RTC clock soucre */ |
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133 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI; |
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134 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
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135 RCC_OscInitStruct.LSIState = RCC_LSI_ON; |
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136 PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI; |
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137 #elif defined (RTC_CLOCK_SOURCE_HSE) |
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138 /* Configue HSE as RTC clock soucre */ |
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139 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; |
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140 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE; |
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141 RCC_OscInitStruct.HSEState = RCC_HSE_ON; |
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142 /* Ensure that RTC is clocked by 1MHz */ |
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143 PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_1MHZ; |
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144 #else |
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145 #error Please select the RTC Clock source |
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146 #endif /* RTC_CLOCK_SOURCE_LSE */ |
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147 |
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148 if(HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK) |
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149 { |
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150 PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC; |
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151 if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) == HAL_OK) |
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152 { |
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153 /* Enable RTC Clock */ |
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154 __HAL_RCC_RTC_ENABLE(); |
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155 /* The time base should be 1ms |
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156 Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK |
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157 HSE as RTC clock |
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158 Time base = ((99 + 1) * (9 + 1)) / 1Mhz |
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159 = 1ms |
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160 LSE as RTC clock |
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161 Time base = ((31 + 1) * (0 + 1)) / 32.768Khz |
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162 = ~1ms |
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163 LSI as RTC clock |
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164 Time base = ((31 + 1) * (0 + 1)) / 32Khz |
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165 = 1ms |
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166 */ |
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167 hRTC_Handle.Instance = RTC; |
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168 hRTC_Handle.Init.HourFormat = RTC_HOURFORMAT_24; |
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169 hRTC_Handle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV; |
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170 hRTC_Handle.Init.SynchPrediv = RTC_SYNCH_PREDIV; |
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171 hRTC_Handle.Init.OutPut = RTC_OUTPUT_DISABLE; |
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172 hRTC_Handle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH; |
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173 hRTC_Handle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN; |
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174 HAL_RTC_Init(&hRTC_Handle); |
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175 |
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176 /* Disable the write protection for RTC registers */ |
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177 __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); |
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178 |
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179 /* Disable the Wake-up Timer */ |
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180 __HAL_RTC_WAKEUPTIMER_DISABLE(&hRTC_Handle); |
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181 |
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182 /* In case of interrupt mode is used, the interrupt source must disabled */ |
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183 __HAL_RTC_WAKEUPTIMER_DISABLE_IT(&hRTC_Handle,RTC_IT_WUT); |
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184 |
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185 /* Wait till RTC WUTWF flag is set */ |
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186 while(__HAL_RTC_WAKEUPTIMER_GET_FLAG(&hRTC_Handle, RTC_FLAG_WUTWF) == RESET) |
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187 { |
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188 if(counter++ == (SystemCoreClock /48U)) |
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189 { |
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190 return HAL_ERROR; |
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191 } |
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192 } |
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193 |
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194 /* Clear PWR wake up Flag */ |
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195 __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU); |
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196 |
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197 /* Clear RTC Wake Up timer Flag */ |
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198 __HAL_RTC_WAKEUPTIMER_CLEAR_FLAG(&hRTC_Handle, RTC_FLAG_WUTF); |
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199 |
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200 /* Configure the Wake-up Timer counter */ |
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201 hRTC_Handle.Instance->WUTR = 0U; |
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202 |
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203 /* Clear the Wake-up Timer clock source bits in CR register */ |
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204 hRTC_Handle.Instance->CR &= (uint32_t)~RTC_CR_WUCKSEL; |
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205 |
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206 /* Configure the clock source */ |
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207 hRTC_Handle.Instance->CR |= (uint32_t)RTC_WAKEUPCLOCK_CK_SPRE_16BITS; |
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208 |
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209 /* RTC WakeUpTimer Interrupt Configuration: EXTI configuration */ |
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210 __HAL_RTC_WAKEUPTIMER_EXTI_ENABLE_IT(); |
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211 |
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212 __HAL_RTC_WAKEUPTIMER_EXTI_ENABLE_RISING_EDGE(); |
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213 |
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214 /* Configure the Interrupt in the RTC_CR register */ |
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215 __HAL_RTC_WAKEUPTIMER_ENABLE_IT(&hRTC_Handle,RTC_IT_WUT); |
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216 |
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217 /* Enable the Wake-up Timer */ |
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218 __HAL_RTC_WAKEUPTIMER_ENABLE(&hRTC_Handle); |
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219 |
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220 /* Enable the write protection for RTC registers */ |
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221 __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); |
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222 |
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223 HAL_NVIC_SetPriority(RTC_WKUP_IRQn, TickPriority, 0U); |
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224 HAL_NVIC_EnableIRQ(RTC_WKUP_IRQn); |
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225 return HAL_OK; |
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226 } |
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227 } |
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228 return HAL_ERROR; |
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229 } |
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230 |
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231 /** |
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232 * @brief Suspend Tick increment. |
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233 * @note Disable the tick increment by disabling RTC_WKUP interrupt. |
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234 * @retval None |
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235 */ |
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236 void HAL_SuspendTick(void) |
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237 { |
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238 /* Disable the write protection for RTC registers */ |
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239 __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); |
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240 /* Disable WAKE UP TIMER Interrupt */ |
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241 __HAL_RTC_WAKEUPTIMER_DISABLE_IT(&hRTC_Handle, RTC_IT_WUT); |
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242 /* Enable the write protection for RTC registers */ |
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243 __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); |
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244 } |
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245 |
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246 /** |
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247 * @brief Resume Tick increment. |
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248 * @note Enable the tick increment by Enabling RTC_WKUP interrupt. |
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249 * @retval None |
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250 */ |
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251 void HAL_ResumeTick(void) |
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252 { |
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253 /* Disable the write protection for RTC registers */ |
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254 __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle); |
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255 /* Enable WAKE UP TIMER interrupt */ |
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256 __HAL_RTC_WAKEUPTIMER_ENABLE_IT(&hRTC_Handle, RTC_IT_WUT); |
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257 /* Enable the write protection for RTC registers */ |
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258 __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle); |
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259 } |
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260 |
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261 /** |
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262 * @brief Wake Up Timer Event Callback in non blocking mode |
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263 * @note This function is called when RTC_WKUP interrupt took place, inside |
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264 * RTC_WKUP_IRQHandler(). It makes a direct call to HAL_IncTick() to increment |
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265 * a global variable "uwTick" used as application time base. |
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266 * @param hrtc RTC handle |
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267 * @retval None |
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268 */ |
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269 void HAL_RTCEx_WakeUpTimerEventCallback(RTC_HandleTypeDef *hrtc) |
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270 { |
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271 HAL_IncTick(); |
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272 } |
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273 |
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274 /** |
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275 * @brief This function handles WAKE UP TIMER interrupt request. |
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276 * @retval None |
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277 */ |
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278 void RTC_WKUP_IRQHandler(void) |
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279 { |
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280 HAL_RTCEx_WakeUpTimerIRQHandler(&hRTC_Handle); |
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281 } |
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282 |
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283 /** |
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284 * @} |
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285 */ |
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286 |
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287 /** |
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288 * @} |
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289 */ |
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290 |
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291 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |