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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_ltdc_ex.c @ 319:d8e86af78474 fix-version

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bugfix: correct packed main version number in dive header This fixes a rather mysterious bug. Users report that up to 1.3.5 beta, a correct version number is shown in libdivecomputer based applications (like in Subsurface, in the extra data tab). Careful examining the code in both libdivecomputer and the firmware shows a subtle error in the bit mask and shift operation to pack a full X.Y.Z.beta version number in 2 bytes (as is available in the dive header) in the firmware end (as the libdivecomputer code looks sane, assuming this is the right way to pack things). Likely, this bug crept in in the conversion from the closed source Keil period into the open source GCC setup of the code base. So its impossible to document the exact history of this problem here. Further notice that the main version number is only 1 of 3 version numbers, denoting the full version of the firmware (besides Font and RTE). Finally notice that this way of packing is limited to 2^5 bits (decimal 32), so we could easily build a 1.4.21, but not a 1.4.55. Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>
author Jan Mulder <jlmulder@xs4all.nl>
date Wed, 19 Jun 2019 14:31:50 +0200
parents c78bcbd5deda
children
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1 /**
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2 ******************************************************************************
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3 * @file stm32f4xx_hal_ltdc_ex.c
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4 * @author MCD Application Team
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5 * @brief LTDC Extension HAL 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
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36 /* Includes ------------------------------------------------------------------*/
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37 #include "stm32f4xx_hal.h"
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38
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39 /** @addtogroup STM32F4xx_HAL_Driver
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40 * @{
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41 */
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42 /** @defgroup LTDCEx LTDCEx
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43 * @brief LTDC HAL module driver
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44 * @{
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45 */
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46
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47 #ifdef HAL_LTDC_MODULE_ENABLED
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48
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49 /* Private typedef -----------------------------------------------------------*/
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50 /* Private define ------------------------------------------------------------*/
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51 /* Private macro -------------------------------------------------------------*/
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52 /* Private variables ---------------------------------------------------------*/
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53 /* Private function prototypes -----------------------------------------------*/
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54 /* Exported functions --------------------------------------------------------*/
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55
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56 /** @defgroup LTDCEx_Exported_Functions LTDC Extended Exported Functions
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57 * @{
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58 */
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59
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60 /** @defgroup LTDCEx_Exported_Functions_Group1 Initialization and Configuration functions
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61 * @brief Initialization and Configuration functions
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62 *
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63 @verbatim
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64 ===============================================================================
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65 ##### Initialization and Configuration functions #####
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66 ===============================================================================
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67 [..] This section provides functions allowing to:
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68 (+) Initialize and configure the LTDC
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69
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70 @endverbatim
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71 * @{
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72 */
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73 #if defined(STM32F469xx) || defined(STM32F479xx)
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74 /**
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75 * @brief Retrieve common parameters from DSI Video mode configuration structure
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76 * @param hltdc pointer to a LTDC_HandleTypeDef structure that contains
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77 * the configuration information for the LTDC.
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78 * @param VidCfg pointer to a DSI_VidCfgTypeDef structure that contains
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79 * the DSI video mode configuration parameters
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80 * @note The implementation of this function is taking into account the LTDC
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81 * polarities inversion as described in the current LTDC specification
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82 * @retval HAL status
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83 */
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84 HAL_StatusTypeDef HAL_LTDCEx_StructInitFromVideoConfig(LTDC_HandleTypeDef* hltdc, DSI_VidCfgTypeDef *VidCfg)
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85 {
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86 /* Retrieve signal polarities from DSI */
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87
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88 /* The following polarity is inverted:
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89 LTDC_DEPOLARITY_AL <-> LTDC_DEPOLARITY_AH */
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90
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91 /* Note 1 : Code in line w/ Current LTDC specification */
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92 hltdc->Init.DEPolarity = (VidCfg->DEPolarity == DSI_DATA_ENABLE_ACTIVE_HIGH) ? LTDC_DEPOLARITY_AL : LTDC_DEPOLARITY_AH;
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93 hltdc->Init.VSPolarity = (VidCfg->VSPolarity == DSI_VSYNC_ACTIVE_HIGH) ? LTDC_VSPOLARITY_AH : LTDC_VSPOLARITY_AL;
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94 hltdc->Init.HSPolarity = (VidCfg->HSPolarity == DSI_HSYNC_ACTIVE_HIGH) ? LTDC_HSPOLARITY_AH : LTDC_HSPOLARITY_AL;
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95
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96 /* Note 2: Code to be used in case LTDC polarities inversion updated in the specification */
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97 /* hltdc->Init.DEPolarity = VidCfg->DEPolarity << 29;
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98 hltdc->Init.VSPolarity = VidCfg->VSPolarity << 29;
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99 hltdc->Init.HSPolarity = VidCfg->HSPolarity << 29; */
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100
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101 /* Retrieve vertical timing parameters from DSI */
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102 hltdc->Init.VerticalSync = VidCfg->VerticalSyncActive - 1U;
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103 hltdc->Init.AccumulatedVBP = VidCfg->VerticalSyncActive + VidCfg->VerticalBackPorch - 1U;
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104 hltdc->Init.AccumulatedActiveH = VidCfg->VerticalSyncActive + VidCfg->VerticalBackPorch + VidCfg->VerticalActive - 1U;
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105 hltdc->Init.TotalHeigh = VidCfg->VerticalSyncActive + VidCfg->VerticalBackPorch + VidCfg->VerticalActive + VidCfg->VerticalFrontPorch - 1U;
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106
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107 return HAL_OK;
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108 }
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109
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110 /**
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111 * @brief Retrieve common parameters from DSI Adapted command mode configuration structure
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112 * @param hltdc pointer to a LTDC_HandleTypeDef structure that contains
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113 * the configuration information for the LTDC.
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114 * @param CmdCfg pointer to a DSI_CmdCfgTypeDef structure that contains
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115 * the DSI command mode configuration parameters
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116 * @note The implementation of this function is taking into account the LTDC
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117 * polarities inversion as described in the current LTDC specification
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118 * @retval HAL status
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119 */
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120 HAL_StatusTypeDef HAL_LTDCEx_StructInitFromAdaptedCommandConfig(LTDC_HandleTypeDef* hltdc, DSI_CmdCfgTypeDef *CmdCfg)
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121 {
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122 /* Retrieve signal polarities from DSI */
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123
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124 /* The following polarities are inverted:
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125 LTDC_DEPOLARITY_AL <-> LTDC_DEPOLARITY_AH
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126 LTDC_VSPOLARITY_AL <-> LTDC_VSPOLARITY_AH
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127 LTDC_HSPOLARITY_AL <-> LTDC_HSPOLARITY_AH)*/
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128
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129 /* Note 1 : Code in line w/ Current LTDC specification */
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130 hltdc->Init.DEPolarity = (CmdCfg->DEPolarity == DSI_DATA_ENABLE_ACTIVE_HIGH) ? LTDC_DEPOLARITY_AL : LTDC_DEPOLARITY_AH;
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131 hltdc->Init.VSPolarity = (CmdCfg->VSPolarity == DSI_VSYNC_ACTIVE_HIGH) ? LTDC_VSPOLARITY_AL : LTDC_VSPOLARITY_AH;
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132 hltdc->Init.HSPolarity = (CmdCfg->HSPolarity == DSI_HSYNC_ACTIVE_HIGH) ? LTDC_HSPOLARITY_AL : LTDC_HSPOLARITY_AH;
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133
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134 /* Note 2: Code to be used in case LTDC polarities inversion updated in the specification */
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135 /* hltdc->Init.DEPolarity = CmdCfg->DEPolarity << 29;
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136 hltdc->Init.VSPolarity = CmdCfg->VSPolarity << 29;
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137 hltdc->Init.HSPolarity = CmdCfg->HSPolarity << 29; */
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138
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139 return HAL_OK;
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140 }
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141 #endif /* STM32F469xx || STM32F479xx */
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142
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143 /**
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144 * @}
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145 */
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146
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147 /**
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148 * @}
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149 */
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150
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151 #endif /* HAL_DCMI_MODULE_ENABLED */
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152 /**
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153 * @}
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154 */
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155
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156 /**
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157 * @}
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158 */
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159
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160 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/