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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_ltdc_ex.c @ 489:0e7c16dd774d

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author heinrichsweikamp
date Mon, 29 Jun 2020 16:18:17 +0200
parents c78bcbd5deda
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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****/