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annotate Common/Drivers/STM32F4xx_HAL_Driver/Src/stm32f4xx_hal_i2c_ex.c @ 691:52d68cf9994c Betatest

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Improvment external interface usage: The previous implementation of the external interface was straight forward for ADC and Co2 UART usage. The new implementation provides the possibility to configurate the behavior of the external interface. e.g. Switching of external3,3V and ADC separatly and selection of UART protocol.
author Ideenmodellierer
date Fri, 05 Aug 2022 15:26:28 +0200
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****/