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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_rng.c @ 311:ddbe8bed5096 cleanup-4

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bugfix: make stopwatch and divetime run in sync And this shows the fundamental issue in the difference between dive time and stopwatch time. The dive time is constructed on the RTE, and rather independently, the stopwatch time is constructed on CPU1. This works rather well, but not perfect. This commit fixes things in a relatively straightforward way. Instead of incrementing the stopwatch locally on CPU1, simply use the same time data that is coming from the RTE. Some logic was added to make this stopwatch resettable again. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Wed, 29 May 2019 14:02:27 +0200
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1 /**
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2 ******************************************************************************
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3 * @file stm32f4xx_ll_rng.c
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4 * @author MCD Application Team
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5 * @brief RNG LL module driver.
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6 ******************************************************************************
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7 * @attention
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8 *
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9 * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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10 *
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11 * Redistribution and use in source and binary forms, with or without modification,
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12 * are permitted provided that the following conditions are met:
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13 * 1. Redistributions of source code must retain the above copyright notice,
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14 * this list of conditions and the following disclaimer.
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15 * 2. Redistributions in binary form must reproduce the above copyright notice,
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16 * this list of conditions and the following disclaimer in the documentation
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17 * and/or other materials provided with the distribution.
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18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
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19 * may be used to endorse or promote products derived from this software
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20 * without specific prior written permission.
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21 *
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22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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32 *
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33 ******************************************************************************
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34 */
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35 #if defined(USE_FULL_LL_DRIVER)
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36
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37 /* Includes ------------------------------------------------------------------*/
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38 #include "stm32f4xx_ll_rng.h"
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39 #include "stm32f4xx_ll_bus.h"
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40
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41 #ifdef USE_FULL_ASSERT
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42 #include "stm32_assert.h"
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43 #else
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44 #define assert_param(expr) ((void)0U)
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45 #endif
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46
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47 /** @addtogroup STM32F4xx_LL_Driver
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48 * @{
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49 */
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50
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51 #if defined (RNG)
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52
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53 /** @addtogroup RNG_LL
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54 * @{
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55 */
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56
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57 /* Private types -------------------------------------------------------------*/
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58 /* Private variables ---------------------------------------------------------*/
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59 /* Private constants ---------------------------------------------------------*/
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60 /* Private macros ------------------------------------------------------------*/
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61 /* Private function prototypes -----------------------------------------------*/
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62
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63 /* Exported functions --------------------------------------------------------*/
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64 /** @addtogroup RNG_LL_Exported_Functions
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65 * @{
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66 */
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67
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68 /** @addtogroup RNG_LL_EF_Init
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69 * @{
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70 */
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71
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72 /**
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73 * @brief De-initialize RNG registers (Registers restored to their default values).
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74 * @param RNGx RNG Instance
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75 * @retval An ErrorStatus enumeration value:
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76 * - SUCCESS: RNG registers are de-initialized
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77 * - ERROR: not applicable
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78 */
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79 ErrorStatus LL_RNG_DeInit(RNG_TypeDef *RNGx)
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80 {
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81 /* Check the parameters */
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82 assert_param(IS_RNG_ALL_INSTANCE(RNGx));
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83
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84 #if !defined (RCC_AHB2_SUPPORT)
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85 /* Enable RNG reset state */
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86 LL_AHB1_GRP1_ForceReset(LL_AHB1_GRP1_PERIPH_RNG);
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87
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88 /* Release RNG from reset state */
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89 LL_AHB1_GRP1_ReleaseReset(LL_AHB1_GRP1_PERIPH_RNG);
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90 #else
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91 /* Enable RNG reset state */
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92 LL_AHB2_GRP1_ForceReset(LL_AHB2_GRP1_PERIPH_RNG);
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93
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94 /* Release RNG from reset state */
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95 LL_AHB2_GRP1_ReleaseReset(LL_AHB2_GRP1_PERIPH_RNG);
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96 #endif
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97
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98 return (SUCCESS);
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99 }
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100
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101 /**
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102 * @}
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103 */
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104
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105 /**
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106 * @}
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107 */
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108
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109 /**
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110 * @}
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111 */
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112
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113 #endif /* defined (RNG) */
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114
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115 /**
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116 * @}
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117 */
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118
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119 #endif /* USE_FULL_LL_DRIVER */
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120
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121 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
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122