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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_i2c_ex.c @ 493:b560e474e319
Added possibility to switch between "classic" bigfont views and a selection with a new information combination
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author | Ideenmodellierer |
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date | Mon, 24 Aug 2020 19:36:18 +0200 |
parents | c78bcbd5deda |
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rev | line source |
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128
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1 /** |
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2 ****************************************************************************** |
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3 * @file stm32f4xx_hal_i2c_ex.c |
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4 * @author MCD Application Team |
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5 * @brief I2C Extension HAL module driver. |
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6 * This file provides firmware functions to manage the following |
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7 * functionalities of I2C extension peripheral: |
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8 * + Extension features functions |
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9 * |
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10 @verbatim |
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11 ============================================================================== |
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12 ##### I2C peripheral extension features ##### |
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13 ============================================================================== |
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14 |
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15 [..] Comparing to other previous devices, the I2C interface for STM32F427xx/437xx/ |
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16 429xx/439xx devices contains the following additional features : |
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17 |
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18 (+) Possibility to disable or enable Analog Noise Filter |
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19 (+) Use of a configured Digital Noise Filter |
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20 |
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21 ##### How to use this driver ##### |
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22 ============================================================================== |
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23 [..] This driver provides functions to configure Noise Filter |
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24 (#) Configure I2C Analog noise filter using the function HAL_I2C_AnalogFilter_Config() |
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25 (#) Configure I2C Digital noise filter using the function HAL_I2C_DigitalFilter_Config() |
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26 |
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27 @endverbatim |
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28 ****************************************************************************** |
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29 * @attention |
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30 * |
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31 * <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2> |
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32 * |
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33 * Redistribution and use in source and binary forms, with or without modification, |
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34 * are permitted provided that the following conditions are met: |
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35 * 1. Redistributions of source code must retain the above copyright notice, |
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36 * this list of conditions and the following disclaimer. |
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37 * 2. Redistributions in binary form must reproduce the above copyright notice, |
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38 * this list of conditions and the following disclaimer in the documentation |
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39 * and/or other materials provided with the distribution. |
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40 * 3. Neither the name of STMicroelectronics nor the names of its contributors |
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41 * may be used to endorse or promote products derived from this software |
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42 * without specific prior written permission. |
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43 * |
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44 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
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45 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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46 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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47 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
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48 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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49 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
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50 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
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51 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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52 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
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53 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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54 * |
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55 ****************************************************************************** |
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56 */ |
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57 |
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58 /* Includes ------------------------------------------------------------------*/ |
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59 #include "stm32f4xx_hal.h" |
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60 |
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61 /** @addtogroup STM32F4xx_HAL_Driver |
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62 * @{ |
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63 */ |
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64 |
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65 /** @defgroup I2CEx I2CEx |
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66 * @brief I2C HAL module driver |
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67 * @{ |
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68 */ |
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69 |
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70 #ifdef HAL_I2C_MODULE_ENABLED |
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71 |
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72 #if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) ||\ |
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73 defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE) || defined(STM32F446xx) ||\ |
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74 defined(STM32F469xx) || defined(STM32F479xx) || defined(STM32F413xx) || defined(STM32F423xx) |
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75 /* Private typedef -----------------------------------------------------------*/ |
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76 /* Private define ------------------------------------------------------------*/ |
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77 /* Private macro -------------------------------------------------------------*/ |
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78 /* Private variables ---------------------------------------------------------*/ |
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79 /* Private function prototypes -----------------------------------------------*/ |
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80 /* Exported functions --------------------------------------------------------*/ |
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81 /** @defgroup I2CEx_Exported_Functions I2C Exported Functions |
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82 * @{ |
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83 */ |
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84 |
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85 |
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86 /** @defgroup I2CEx_Exported_Functions_Group1 Extension features functions |
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87 * @brief Extension features functions |
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88 * |
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89 @verbatim |
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90 =============================================================================== |
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91 ##### Extension features functions ##### |
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92 =============================================================================== |
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93 [..] This section provides functions allowing to: |
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94 (+) Configure Noise Filters |
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95 |
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96 @endverbatim |
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97 * @{ |
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98 */ |
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99 |
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100 /** |
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101 * @brief Configures I2C Analog noise filter. |
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102 * @param hi2c pointer to a I2C_HandleTypeDef structure that contains |
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103 * the configuration information for the specified I2Cx peripheral. |
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104 * @param AnalogFilter new state of the Analog filter. |
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105 * @retval HAL status |
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106 */ |
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107 HAL_StatusTypeDef HAL_I2CEx_ConfigAnalogFilter(I2C_HandleTypeDef *hi2c, uint32_t AnalogFilter) |
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108 { |
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109 /* Check the parameters */ |
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110 assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance)); |
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111 assert_param(IS_I2C_ANALOG_FILTER(AnalogFilter)); |
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112 |
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113 if(hi2c->State == HAL_I2C_STATE_READY) |
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114 { |
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115 hi2c->State = HAL_I2C_STATE_BUSY; |
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116 |
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117 /* Disable the selected I2C peripheral */ |
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118 __HAL_I2C_DISABLE(hi2c); |
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119 |
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120 /* Reset I2Cx ANOFF bit */ |
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121 hi2c->Instance->FLTR &= ~(I2C_FLTR_ANOFF); |
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122 |
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123 /* Disable the analog filter */ |
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124 hi2c->Instance->FLTR |= AnalogFilter; |
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125 |
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126 __HAL_I2C_ENABLE(hi2c); |
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127 |
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128 hi2c->State = HAL_I2C_STATE_READY; |
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129 |
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130 return HAL_OK; |
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131 } |
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132 else |
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133 { |
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134 return HAL_BUSY; |
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135 } |
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136 } |
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137 |
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138 /** |
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139 * @brief Configures I2C Digital noise filter. |
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140 * @param hi2c pointer to a I2C_HandleTypeDef structure that contains |
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141 * the configuration information for the specified I2Cx peripheral. |
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142 * @param DigitalFilter Coefficient of digital noise filter between 0x00 and 0x0F. |
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143 * @retval HAL status |
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144 */ |
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145 HAL_StatusTypeDef HAL_I2CEx_ConfigDigitalFilter(I2C_HandleTypeDef *hi2c, uint32_t DigitalFilter) |
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146 { |
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147 uint16_t tmpreg = 0; |
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148 |
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149 /* Check the parameters */ |
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150 assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance)); |
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151 assert_param(IS_I2C_DIGITAL_FILTER(DigitalFilter)); |
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152 |
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153 if(hi2c->State == HAL_I2C_STATE_READY) |
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154 { |
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155 hi2c->State = HAL_I2C_STATE_BUSY; |
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156 |
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157 /* Disable the selected I2C peripheral */ |
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158 __HAL_I2C_DISABLE(hi2c); |
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159 |
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160 /* Get the old register value */ |
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161 tmpreg = hi2c->Instance->FLTR; |
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162 |
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163 /* Reset I2Cx DNF bit [3:0] */ |
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164 tmpreg &= ~(I2C_FLTR_DNF); |
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165 |
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166 /* Set I2Cx DNF coefficient */ |
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167 tmpreg |= DigitalFilter; |
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168 |
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169 /* Store the new register value */ |
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170 hi2c->Instance->FLTR = tmpreg; |
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171 |
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172 __HAL_I2C_ENABLE(hi2c); |
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173 |
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174 hi2c->State = HAL_I2C_STATE_READY; |
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175 |
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176 return HAL_OK; |
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177 } |
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178 else |
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179 { |
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180 return HAL_BUSY; |
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181 } |
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182 } |
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183 |
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184 /** |
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185 * @} |
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186 */ |
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187 |
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188 /** |
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189 * @} |
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190 */ |
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191 #endif /* STM32F427xx || STM32F429xx || STM32F437xx || STM32F439xx || STM32F401xC ||\ |
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192 STM32F401xE || STM32F446xx || STM32F469xx || STM32F479xx || STM32F413xx ||\ |
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193 STM32F423xx */ |
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194 |
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195 #endif /* HAL_I2C_MODULE_ENABLED */ |
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196 /** |
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197 * @} |
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198 */ |
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199 |
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200 /** |
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201 * @} |
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202 */ |
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203 |
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204 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |