mbed library sources
Dependents: frdm_kl05z_gpio_test
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targets/cmsis/TARGET_STM/TARGET_NUCLEO_F401RE/stm32f4xx_hal_i2c_ex.c
- Committer:
- mbed_official
- Date:
- 2014-06-11
- Revision:
- 226:b062af740e40
- Parent:
- 106:ced8cbb51063
File content as of revision 226:b062af740e40:
/** ****************************************************************************** * @file stm32f4xx_hal_i2c_ex.c * @author MCD Application Team * @version V1.1.0RC2 * @date 14-May-2014 * @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) 2014 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 * @brief I2C HAL module driver * @{ */ #ifdef HAL_I2C_MODULE_ENABLED #if defined(STM32F427xx) || defined(STM32F437xx) || defined(STM32F429xx)|| defined(STM32F439xx) || defined(STM32F401xC) || defined(STM32F401xE) /* Private typedef -----------------------------------------------------------*/ /* Private define ------------------------------------------------------------*/ /* Private macro -------------------------------------------------------------*/ /* Private variables ---------------------------------------------------------*/ /* Private function prototypes -----------------------------------------------*/ /* Private functions ---------------------------------------------------------*/ /** @defgroup I2CEx_Private_Functions * @{ */ /** @defgroup I2CEx_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_AnalogFilter_Config(I2C_HandleTypeDef *hi2c, uint32_t AnalogFilter) { uint32_t tmp = 0; /* Check the parameters */ assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance)); assert_param(IS_I2C_ANALOG_FILTER(AnalogFilter)); tmp = hi2c->State; if((tmp == HAL_I2C_STATE_BUSY) || (tmp == HAL_I2C_STATE_BUSY_TX) || (tmp == HAL_I2C_STATE_BUSY_RX)) { return HAL_BUSY; } 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; } /** * @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_DigitalFilter_Config(I2C_HandleTypeDef *hi2c, uint32_t DigitalFilter) { uint16_t tmpreg = 0; uint32_t tmp = 0; /* Check the parameters */ assert_param(IS_I2C_ALL_INSTANCE(hi2c->Instance)); assert_param(IS_I2C_DIGITAL_FILTER(DigitalFilter)); tmp = hi2c->State; if((tmp == HAL_I2C_STATE_BUSY) || (tmp == HAL_I2C_STATE_BUSY_TX) || (tmp == HAL_I2C_STATE_BUSY_RX)) { return HAL_BUSY; } 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; } /** * @} */ /** * @} */ #endif /* STM32F427xx || STM32F429xx || STM32F437xx || STM32F439xx || STM32F401xC || STM32F401xE */ #endif /* HAL_I2C_MODULE_ENABLED */ /** * @} */ /** * @} */ /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/