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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_timebase_rtc_alarm_template.c @ 135:5df4f1a315cb FlipDisplay

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Restore old data copy locations Do first calculation based on ambient bar to avoid desaturation shift Added error handling for lost communication
author Ideenmodellierer
date Tue, 19 Feb 2019 18:18:37 +0100
parents c78bcbd5deda
children
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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_alarm_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_ALARM Template.
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6 *
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7 * This file override the native HAL time base functions (defined as weak)
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8 * to use the RTC ALARM for time base generation:
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9 * + Intializes the RTC peripheral to increment the seconds registers each 1ms
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10 * + The alarm is configured to assert an interrupt when the RTC reaches 1ms
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11 * + HAL_IncTick is called at each Alarm event and the time is reset to 00:00:00
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12 * + HSE (default), LSE or LSI can be selected as RTC clock source
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13 @verbatim
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14 ==============================================================================
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15 ##### How to use this driver #####
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16 ==============================================================================
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17 [..]
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18 This file must be copied to the application folder and modified as follows:
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19 (#) Rename it to 'stm32f4xx_hal_timebase_rtc_alarm.c'
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20 (#) Add this file and the RTC HAL drivers to your project and uncomment
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21 HAL_RTC_MODULE_ENABLED define in stm32f4xx_hal_conf.h
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22
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23 [..]
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24 (@) HAL RTC alarm and HAL RTC wakeup drivers can’t be used with low power modes:
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25 The wake up capability of the RTC may be intrusive in case of prior low power mode
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26 configuration requiring different wake up sources.
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27 Application/Example behavior is no more guaranteed
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28 (@) The stm32f4xx_hal_timebase_tim use is recommended for the Applications/Examples
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29 requiring low power modes
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30
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31 @endverbatim
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32 ******************************************************************************
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33 * @attention
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34 *
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35 * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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36 *
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37 * Redistribution and use in source and binary forms, with or without modification,
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38 * are permitted provided that the following conditions are met:
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39 * 1. Redistributions of source code must retain the above copyright notice,
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40 * this list of conditions and the following disclaimer.
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41 * 2. Redistributions in binary form must reproduce the above copyright notice,
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42 * this list of conditions and the following disclaimer in the documentation
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43 * and/or other materials provided with the distribution.
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44 * 3. Neither the name of STMicroelectronics nor the names of its contributors
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45 * may be used to endorse or promote products derived from this software
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46 * without specific prior written permission.
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47 *
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48 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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49 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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51 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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54 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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55 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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56 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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57 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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58 *
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59 ******************************************************************************
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60 */
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61
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62 /* Includes ------------------------------------------------------------------*/
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63 #include "stm32f4xx_hal.h"
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64 /** @addtogroup STM32F4xx_HAL_Driver
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65 * @{
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66 */
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67
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68 /** @defgroup HAL_TimeBase_RTC_Alarm_Template HAL TimeBase RTC Alarm Template
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69 * @{
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70 */
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71
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72 /* Private typedef -----------------------------------------------------------*/
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73 /* Private define ------------------------------------------------------------*/
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74
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75 /* Uncomment the line below to select the appropriate RTC Clock source for your application:
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76 + RTC_CLOCK_SOURCE_HSE: can be selected for applications requiring timing precision.
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77 + RTC_CLOCK_SOURCE_LSE: can be selected for applications with low constraint on timing
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78 precision.
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79 + RTC_CLOCK_SOURCE_LSI: can be selected for applications with low constraint on timing
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80 precision.
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81 */
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82 #define RTC_CLOCK_SOURCE_HSE
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83 /* #define RTC_CLOCK_SOURCE_LSE */
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84 /* #define RTC_CLOCK_SOURCE_LSI */
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85
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86 #ifdef RTC_CLOCK_SOURCE_HSE
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87 #define RTC_ASYNCH_PREDIV 99U
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88 #define RTC_SYNCH_PREDIV 9U
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89 #define RCC_RTCCLKSOURCE_1MHZ ((uint32_t)((uint32_t)RCC_BDCR_RTCSEL | (uint32_t)((HSE_VALUE/1000000U) << 16U)))
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90 #else /* RTC_CLOCK_SOURCE_LSE || RTC_CLOCK_SOURCE_LSI */
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91 #define RTC_ASYNCH_PREDIV 0U
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92 #define RTC_SYNCH_PREDIV 31U
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93 #endif /* RTC_CLOCK_SOURCE_HSE */
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94
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95 /* Private macro -------------------------------------------------------------*/
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96 /* Private variables ---------------------------------------------------------*/
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97 RTC_HandleTypeDef hRTC_Handle;
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98 /* Private function prototypes -----------------------------------------------*/
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99 void RTC_Alarm_IRQHandler(void);
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100 /* Private functions ---------------------------------------------------------*/
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101
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102 /**
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103 * @brief This function configures the RTC_ALARMA as a time base source.
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104 * The time source is configured to have 1ms time base with a dedicated
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105 * Tick interrupt priority.
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106 * @note This function is called automatically at the beginning of program after
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107 * reset by HAL_Init() or at any time when clock is configured, by HAL_RCC_ClockConfig().
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108 * @param TickPriority Tick interrupt priority.
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109 * @retval HAL status
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110 */
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111 HAL_StatusTypeDef HAL_InitTick (uint32_t TickPriority)
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112 {
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113 __IO uint32_t counter = 0U;
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114
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115 RCC_OscInitTypeDef RCC_OscInitStruct;
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116 RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
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117
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118 #ifdef RTC_CLOCK_SOURCE_LSE
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119 /* Configue LSE as RTC clock soucre */
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120 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
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121 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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122 RCC_OscInitStruct.LSEState = RCC_LSE_ON;
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123 PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSE;
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124 #elif defined (RTC_CLOCK_SOURCE_LSI)
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125 /* Configue LSI as RTC clock soucre */
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126 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI;
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127 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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128 RCC_OscInitStruct.LSIState = RCC_LSI_ON;
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129 PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
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130 #elif defined (RTC_CLOCK_SOURCE_HSE)
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131 /* Configue HSE as RTC clock soucre */
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132 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
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133 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
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134 RCC_OscInitStruct.HSEState = RCC_HSE_ON;
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135 /* Ensure that RTC is clocked by 1MHz */
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136 PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_1MHZ;
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137 #else
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138 #error Please select the RTC Clock source
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139 #endif /* RTC_CLOCK_SOURCE_LSE */
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140
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141 if(HAL_RCC_OscConfig(&RCC_OscInitStruct) == HAL_OK)
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142 {
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143 PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC;
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144 if(HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) == HAL_OK)
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145 {
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146 /* Enable RTC Clock */
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147 __HAL_RCC_RTC_ENABLE();
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148 /* The time base should be 1ms
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149 Time base = ((RTC_ASYNCH_PREDIV + 1) * (RTC_SYNCH_PREDIV + 1)) / RTC_CLOCK
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150 HSE as RTC clock
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151 Time base = ((99 + 1) * (9 + 1)) / 1MHz
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152 = 1ms
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153 LSE as RTC clock
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154 Time base = ((31 + 1) * (0 + 1)) / 32.768KHz
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155 = ~1ms
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156 LSI as RTC clock
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157 Time base = ((31 + 1) * (0 + 1)) / 32KHz
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158 = 1ms
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159 */
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160 hRTC_Handle.Instance = RTC;
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161 hRTC_Handle.Init.HourFormat = RTC_HOURFORMAT_24;
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162 hRTC_Handle.Init.AsynchPrediv = RTC_ASYNCH_PREDIV;
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163 hRTC_Handle.Init.SynchPrediv = RTC_SYNCH_PREDIV;
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164 hRTC_Handle.Init.OutPut = RTC_OUTPUT_DISABLE;
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165 hRTC_Handle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
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166 hRTC_Handle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
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167 HAL_RTC_Init(&hRTC_Handle);
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168
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169 /* Disable the write protection for RTC registers */
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170 __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle);
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171
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172 /* Disable the Alarm A interrupt */
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173 __HAL_RTC_ALARMA_DISABLE(&hRTC_Handle);
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174
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175 /* Clear flag alarm A */
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176 __HAL_RTC_ALARM_CLEAR_FLAG(&hRTC_Handle, RTC_FLAG_ALRAF);
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177
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178 counter = 0U;
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179 /* Wait till RTC ALRAWF flag is set and if Time out is reached exit */
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180 while(__HAL_RTC_ALARM_GET_FLAG(&hRTC_Handle, RTC_FLAG_ALRAWF) == RESET)
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181 {
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182 if(counter++ == (SystemCoreClock /48U)) /* Timeout = ~ 1s */
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183 {
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184 return HAL_ERROR;
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185 }
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186 }
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187
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188 hRTC_Handle.Instance->ALRMAR = (uint32_t)0x01U;
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189
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190 /* Configure the Alarm state: Enable Alarm */
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191 __HAL_RTC_ALARMA_ENABLE(&hRTC_Handle);
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192 /* Configure the Alarm interrupt */
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193 __HAL_RTC_ALARM_ENABLE_IT(&hRTC_Handle, RTC_IT_ALRA);
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194
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195 /* RTC Alarm Interrupt Configuration: EXTI configuration */
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196 __HAL_RTC_ALARM_EXTI_ENABLE_IT();
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197 __HAL_RTC_ALARM_EXTI_ENABLE_RISING_EDGE();
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198
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199 /* Check if the Initialization mode is set */
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200 if((hRTC_Handle.Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET)
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201 {
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202 /* Set the Initialization mode */
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203 hRTC_Handle.Instance->ISR = (uint32_t)RTC_INIT_MASK;
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204 counter = 0U;
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205 while((hRTC_Handle.Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET)
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206 {
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207 if(counter++ == (SystemCoreClock /48U)) /* Timeout = ~ 1s */
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208 {
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209 return HAL_ERROR;
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210 }
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211 }
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212 }
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213 hRTC_Handle.Instance->DR = 0U;
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214 hRTC_Handle.Instance->TR = 0U;
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215
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216 hRTC_Handle.Instance->ISR &= (uint32_t)~RTC_ISR_INIT;
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217
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218 /* Enable the write protection for RTC registers */
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219 __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle);
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220
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221 HAL_NVIC_SetPriority(RTC_Alarm_IRQn, TickPriority, 0U);
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222 HAL_NVIC_EnableIRQ(RTC_Alarm_IRQn);
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223 return HAL_OK;
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224 }
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225 }
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226 return HAL_ERROR;
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227 }
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228
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229 /**
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230 * @brief Suspend Tick increment.
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231 * @note Disable the tick increment by disabling RTC ALARM interrupt.
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232 * @retval None
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233 */
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234 void HAL_SuspendTick(void)
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235 {
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236 /* Disable the write protection for RTC registers */
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237 __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle);
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238 /* Disable RTC ALARM update Interrupt */
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239 __HAL_RTC_ALARM_DISABLE_IT(&hRTC_Handle, RTC_IT_ALRA);
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240 /* Enable the write protection for RTC registers */
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241 __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle);
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242 }
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243
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244 /**
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245 * @brief Resume Tick increment.
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246 * @note Enable the tick increment by Enabling RTC ALARM interrupt.
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247 * @retval None
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248 */
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249 void HAL_ResumeTick(void)
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250 {
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251 /* Disable the write protection for RTC registers */
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252 __HAL_RTC_WRITEPROTECTION_DISABLE(&hRTC_Handle);
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253 /* Enable RTC ALARM Update interrupt */
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254 __HAL_RTC_ALARM_ENABLE_IT(&hRTC_Handle, RTC_IT_ALRA);
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255 /* Enable the write protection for RTC registers */
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256 __HAL_RTC_WRITEPROTECTION_ENABLE(&hRTC_Handle);
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257 }
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258
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259 /**
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260 * @brief ALARM A Event Callback in non blocking mode
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261 * @note This function is called when RTC_ALARM interrupt took place, inside
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262 * RTC_ALARM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment
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263 * a global variable "uwTick" used as application time base.
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264 * @param hrtc RTC handle
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265 * @retval None
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266 */
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267 void HAL_RTC_AlarmAEventCallback(RTC_HandleTypeDef *hrtc)
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268 {
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269 __IO uint32_t counter = 0U;
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270
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271 HAL_IncTick();
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272
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273 __HAL_RTC_WRITEPROTECTION_DISABLE(hrtc);
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274
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275 /* Set the Initialization mode */
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276 hrtc->Instance->ISR = (uint32_t)RTC_INIT_MASK;
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277
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278 while((hrtc->Instance->ISR & RTC_ISR_INITF) == (uint32_t)RESET)
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279 {
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280 if(counter++ == (SystemCoreClock /48U)) /* Timeout = ~ 1s */
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281 {
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282 break;
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283 }
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284 }
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285
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286 hrtc->Instance->DR = 0U;
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287 hrtc->Instance->TR = 0U;
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288
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289 hrtc->Instance->ISR &= (uint32_t)~RTC_ISR_INIT;
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290
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291 /* Enable the write protection for RTC registers */
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292 __HAL_RTC_WRITEPROTECTION_ENABLE(hrtc);
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293 }
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294
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295 /**
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296 * @brief This function handles RTC ALARM interrupt request.
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297 * @retval None
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298 */
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299 void RTC_Alarm_IRQHandler(void)
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300 {
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301 HAL_RTC_AlarmIRQHandler(&hRTC_Handle);
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302 }
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303
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304 /**
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305 * @}
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306 */
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307
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308 /**
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309 * @}
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310 */
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311
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312 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/