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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_ll_rng.c @ 322:31e471d60797 O2_SensorSync

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Added start of frame detection for HUD data In the previous impmenentation the reception and evaluation of 15 byte were used without start detection. As a result sensor data could be stuck in case the frame sequence does not match the structure (e.g. cause by an framing error). To resolve this in case of an invalid checksumme in combination with a data lost detection a byte based reception is startet to detect the start of a frame using the break between two transmissions. In addition a babbling idiot protecting has been added because a faulty hardware could have an impact on the OSTC operation (high interrupt load)
author ideenmodellierer
date Sun, 30 Jun 2019 21:25:58 +0200
parents c78bcbd5deda
children
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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