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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_i2c_ex.c @ 442:adb18fe92737 minor_improvments

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Introduced enum for lower left corner view selection: Enums allow changes in view configuration without danger of index inconsistencies
author ideenmodellierer
date Sat, 29 Feb 2020 22:25:20 +0100
parents c78bcbd5deda
children
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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>&copy; 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****/