/** | |
****************************************************************************** | |
* @file stm32f4xx_hal_i2c_ex.c | |
* @author MCD Application Team | |
* @brief I2C Extension HAL module driver. | |
* This file provides firmware functions to manage the following | |
* functionalities of I2C extension peripheral: | |
* + Extension features functions | |
* | |
@verbatim | |
============================================================================== | |
##### I2C peripheral extension features ##### | |
============================================================================== | |
[..] Comparing to other previous devices, the I2C interface for STM32F427xx/437xx/ | |
429xx/439xx devices contains the following additional features : | |
(+) Possibility to disable or enable Analog Noise Filter | |
(+) Use of a configured Digital Noise Filter | |
##### How to use this driver ##### | |
============================================================================== | |
[..] This driver provides functions to configure Noise Filter | |
(#) Configure I2C Analog noise filter using the function HAL_I2C_AnalogFilter_Config() | |
(#) Configure I2C Digital noise filter using the function HAL_I2C_DigitalFilter_Config() | |
@endverbatim | |
****************************************************************************** | |
* @attention | |
* | |
* <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2> | |
* | |
* Redistribution and use in source and binary forms, with or without modification, | |
* are permitted provided that the following conditions are met: | |
* 1. Redistributions of source code must retain the above copyright notice, | |
* this list of conditions and the following disclaimer. | |
* 2. Redistributions in binary form must reproduce the above copyright notice, | |
* this list of conditions and the following disclaimer in the documentation | |
* and/or other materials provided with the distribution. | |
* 3. Neither the name of STMicroelectronics nor the names of its contributors | |
* may be used to endorse or promote products derived from this software | |
* without specific prior written permission. | |
* | |
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | |
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE | |
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER | |
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, | |
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
* | |
****************************************************************************** | |
*/ | |
/* Includes ------------------------------------------------------------------*/ | |
#include "stm32f4xx_hal.h" | |
/** @addtogroup STM32F4xx_HAL_Driver | |
* @{ | |
*/ | |
/** @defgroup I2CEx I2CEx | |
* @brief I2C HAL module driver | |
* @{ | |
*/ | |
#ifdef HAL_I2C_MODULE_ENABLED | |
#if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx) || defined(STM32F439xx) ||\ | |
defined(STM32F401xC) || defined(STM32F401xE) || defined(STM32F411xE) || defined(STM32F446xx) ||\ | |
defined(STM32F469xx) || defined(STM32F479xx) || defined(STM32F413xx) || defined(STM32F423xx) | |
/* Private typedef -----------------------------------------------------------*/ | |
/* Private define ------------------------------------------------------------*/ | |
/* Private macro -------------------------------------------------------------*/ | |
/* Private variables ---------------------------------------------------------*/ | |
/* Private function prototypes -----------------------------------------------*/ | |
/* Exported functions --------------------------------------------------------*/ | |
/** @defgroup I2CEx_Exported_Functions I2C Exported Functions | |
* @{ | |
*/ | |
/** @defgroup I2CEx_Exported_Functions_Group1 Extension features functions | |
* @brief Extension features functions | |
* | |
@verbatim | |
=============================================================================== | |
##### Extension features functions ##### | |
=============================================================================== | |
[..] This section provides functions allowing to: | |
(+) Configure Noise Filters | |
@endverbatim | |
* @{ | |
*/ | |
/** | |
* @brief Configures I2C Analog noise filter. | |
* @param hi2c pointer to a I2C_HandleTypeDef structure that contains | |
* the configuration information for the specified I2Cx peripheral. | |
* @param AnalogFilter new state of the Analog filter. | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_I2CEx_ConfigAnalogFilter(I2C_HandleTypeDef *hi2c, uint32_t AnalogFilter) | |
{ | |
/* Check the parameters */ | |
assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance)); | |
assert_param(IS_I2C_ANALOG_FILTER(AnalogFilter)); | |
if(hi2c->State == HAL_I2C_STATE_READY) | |
{ | |
hi2c->State = HAL_I2C_STATE_BUSY; | |
/* Disable the selected I2C peripheral */ | |
__HAL_I2C_DISABLE(hi2c); | |
/* Reset I2Cx ANOFF bit */ | |
hi2c->Instance->FLTR &= ~(I2C_FLTR_ANOFF); | |
/* Disable the analog filter */ | |
hi2c->Instance->FLTR |= AnalogFilter; | |
__HAL_I2C_ENABLE(hi2c); | |
hi2c->State = HAL_I2C_STATE_READY; | |
return HAL_OK; | |
} | |
else | |
{ | |
return HAL_BUSY; | |
} | |
} | |
/** | |
* @brief Configures I2C Digital noise filter. | |
* @param hi2c pointer to a I2C_HandleTypeDef structure that contains | |
* the configuration information for the specified I2Cx peripheral. | |
* @param DigitalFilter Coefficient of digital noise filter between 0x00 and 0x0F. | |
* @retval HAL status | |
*/ | |
HAL_StatusTypeDef HAL_I2CEx_ConfigDigitalFilter(I2C_HandleTypeDef *hi2c, uint32_t DigitalFilter) | |
{ | |
uint16_t tmpreg = 0; | |
/* Check the parameters */ | |
assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance)); | |
assert_param(IS_I2C_DIGITAL_FILTER(DigitalFilter)); | |
if(hi2c->State == HAL_I2C_STATE_READY) | |
{ | |
hi2c->State = HAL_I2C_STATE_BUSY; | |
/* Disable the selected I2C peripheral */ | |
__HAL_I2C_DISABLE(hi2c); | |
/* Get the old register value */ | |
tmpreg = hi2c->Instance->FLTR; | |
/* Reset I2Cx DNF bit [3:0] */ | |
tmpreg &= ~(I2C_FLTR_DNF); | |
/* Set I2Cx DNF coefficient */ | |
tmpreg |= DigitalFilter; | |
/* Store the new register value */ | |
hi2c->Instance->FLTR = tmpreg; | |
__HAL_I2C_ENABLE(hi2c); | |
hi2c->State = HAL_I2C_STATE_READY; | |
return HAL_OK; | |
} | |
else | |
{ | |
return HAL_BUSY; | |
} | |
} | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
#endif /* STM32F427xx || STM32F429xx || STM32F437xx || STM32F439xx || STM32F401xC ||\ | |
STM32F401xE || STM32F446xx || STM32F469xx || STM32F479xx || STM32F413xx ||\ | |
STM32F423xx */ | |
#endif /* HAL_I2C_MODULE_ENABLED */ | |
/** | |
* @} | |
*/ | |
/** | |
* @} | |
*/ | |
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |