tmk_core/tool/mbed/mbed-sdk/libraries/mbed/targets/cmsis/TARGET_STM/TARGET_STM32F4/stm32f4xx_hal_i2c_ex.c

   1 /**
   2   ******************************************************************************
   3   * @file    stm32f4xx_hal_i2c_ex.c
   4   * @author  MCD Application Team
   5   * @version V1.1.0
   6   * @date    19-June-2014
   7   * @brief   I2C Extension HAL module driver.
   8   *          This file provides firmware functions to manage the following
   9   *          functionalities of I2C extension peripheral:
  10   *           + Extension features functions
  11   *
  12   @verbatim
  13   ==============================================================================
  14                ##### I2C peripheral extension features  #####
  15   ==============================================================================
  16
  17   [..] Comparing to other previous devices, the I2C interface for STM32F427xx/437xx/
  18        429xx/439xx devices contains the following additional features :
  19
  20        (+) Possibility to disable or enable Analog Noise Filter
  21        (+) Use of a configured Digital Noise Filter
  22
  23                      ##### How to use this driver #####
  24   ==============================================================================
  25   [..] This driver provides functions to configure Noise Filter
  26     (#) Configure I2C Analog noise filter using the function HAL_I2C_AnalogFilter_Config()
  27     (#) Configure I2C Digital noise filter using the function HAL_I2C_DigitalFilter_Config()
  28
  29   @endverbatim
  30   ******************************************************************************
  31   * @attention
  32   *
  33   * <h2><center>&copy; COPYRIGHT(c) 2014 STMicroelectronics</center></h2>
  34   *
  35   * Redistribution and use in source and binary forms, with or without modification,
  36   * are permitted provided that the following conditions are met:
  37   *   1. Redistributions of source code must retain the above copyright notice,
  38   *      this list of conditions and the following disclaimer.
  39   *   2. Redistributions in binary form must reproduce the above copyright notice,
  40   *      this list of conditions and the following disclaimer in the documentation
  41   *      and/or other materials provided with the distribution.
  42   *   3. Neither the name of STMicroelectronics nor the names of its contributors
  43   *      may be used to endorse or promote products derived from this software
  44   *      without specific prior written permission.
  45   *
  46   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  47   * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  48   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  49   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  50   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  51   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  52   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  53   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  54   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  55   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  56   *
  57   ******************************************************************************
  58   */
  59
  60 /* Includes ------------------------------------------------------------------*/
  61 #include "stm32f4xx_hal.h"
  62
  63 /** @addtogroup STM32F4xx_HAL_Driver
  64   * @{
  65   */
  66
  67 /** @defgroup I2CEx
  68   * @brief I2C HAL module driver
  69   * @{
  70   */
  71
  72 #ifdef HAL_I2C_MODULE_ENABLED
  73
  74 #if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx)|| defined(STM32F439xx) ||\
  75     defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE)
  76 /* Private typedef -----------------------------------------------------------*/
  77 /* Private define ------------------------------------------------------------*/
  78 /* Private macro -------------------------------------------------------------*/
  79 /* Private variables ---------------------------------------------------------*/
  80 /* Private function prototypes -----------------------------------------------*/
  81 /* Private functions ---------------------------------------------------------*/
  82
  83 /** @defgroup I2CEx_Private_Functions
  84   * @{
  85   */
  86
  87
  88 /** @defgroup I2CEx_Group1 Extension features functions
  89  *  @brief   Extension features functions
  90  *
  91 @verbatim
  92  ===============================================================================
  93                       ##### Extension features functions #####
  94  ===============================================================================
  95     [..] This section provides functions allowing to:
  96       (+) Configure Noise Filters
  97
  98 @endverbatim
  99   * @{
 100   */
 101
 102 /**
 103   * @brief  Configures I2C Analog noise filter.
 104   * @param  hi2c: pointer to a I2C_HandleTypeDef structure that contains
 105   *                the configuration information for the specified I2Cx peripheral.
 106   * @param  AnalogFilter: new state of the Analog filter.
 107   * @retval HAL status
 108   */
 109 HAL_StatusTypeDef HAL_I2CEx_AnalogFilter_Config(I2C_HandleTypeDef *hi2c, uint32_t AnalogFilter)
 110 {
 111   uint32_t tmp = 0;
 112
 113   /* Check the parameters */
 114   assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));
 115   assert_param(IS_I2C_ANALOG_FILTER(AnalogFilter));
 116
 117   tmp = hi2c->State;
 118   if((tmp == HAL_I2C_STATE_BUSY) || (tmp == HAL_I2C_STATE_BUSY_TX) || (tmp == HAL_I2C_STATE_BUSY_RX))
 119   {
 120     return HAL_BUSY;
 121   }
 122
 123   hi2c->State = HAL_I2C_STATE_BUSY;
 124
 125   /* Disable the selected I2C peripheral */
 126   __HAL_I2C_DISABLE(hi2c);
 127
 128   /* Reset I2Cx ANOFF bit */
 129   hi2c->Instance->FLTR &= ~(I2C_FLTR_ANOFF);
 130
 131   /* Disable the analog filter */
 132   hi2c->Instance->FLTR |= AnalogFilter;
 133
 134   __HAL_I2C_ENABLE(hi2c);
 135
 136   hi2c->State = HAL_I2C_STATE_READY;
 137
 138   return HAL_OK;
 139 }
 140
 141 /**
 142   * @brief  Configures I2C Digital noise filter.
 143   * @param  hi2c: pointer to a I2C_HandleTypeDef structure that contains
 144   *                the configuration information for the specified I2Cx peripheral.
 145   * @param  DigitalFilter: Coefficient of digital noise filter between 0x00 and 0x0F.
 146   * @retval HAL status
 147   */
 148 HAL_StatusTypeDef HAL_I2CEx_DigitalFilter_Config(I2C_HandleTypeDef *hi2c, uint32_t DigitalFilter)
 149 {
 150   uint16_t tmpreg = 0;
 151   uint32_t tmp = 0;
 152
 153   /* Check the parameters */
 154   assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance));
 155   assert_param(IS_I2C_DIGITAL_FILTER(DigitalFilter));
 156
 157   tmp = hi2c->State;
 158   if((tmp == HAL_I2C_STATE_BUSY) || (tmp == HAL_I2C_STATE_BUSY_TX) || (tmp == HAL_I2C_STATE_BUSY_RX))
 159   {
 160     return HAL_BUSY;
 161   }
 162
 163   hi2c->State = HAL_I2C_STATE_BUSY;
 164
 165   /* Disable the selected I2C peripheral */
 166   __HAL_I2C_DISABLE(hi2c);
 167
 168   /* Get the old register value */
 169   tmpreg = hi2c->Instance->FLTR;
 170
 171   /* Reset I2Cx DNF bit [3:0] */
 172   tmpreg &= ~(I2C_FLTR_DNF);
 173
 174   /* Set I2Cx DNF coefficient */
 175   tmpreg |= DigitalFilter;
 176
 177   /* Store the new register value */
 178   hi2c->Instance->FLTR = tmpreg;
 179
 180   __HAL_I2C_ENABLE(hi2c);
 181
 182   hi2c->State = HAL_I2C_STATE_READY;
 183
 184   return HAL_OK;
 185 }
 186
 187 /**
 188   * @}
 189   */
 190
 191 /**
 192   * @}
 193   */
 194 #endif /* STM32F427xx || STM32F429xx || STM32F437xx || STM32F439xx || STM32F401xC || STM32F401xE */
 195
 196 #endif /* HAL_I2C_MODULE_ENABLED */
 197 /**
 198   * @}
 199   */
 200
 201 /**
 202   * @}
 203   */
 204
 205 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/