/**+
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  ******************************************************************************+
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  * @file    stm32f4xx_ll_i2c.c+
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  * @author  MCD Application Team+
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  * @brief   I2C LL module driver.+
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  ******************************************************************************+
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  * @attention+
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  *+
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  * <h2><center>&copy; COPYRIGHT(c) 2017 STMicroelectronics</center></h2>+
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  *+
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  * Redistribution and use in source and binary forms, with or without modification,+
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  * are permitted provided that the following conditions are met:+
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  *   1. Redistributions of source code must retain the above copyright notice,+
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  *      this list of conditions and the following disclaimer.+
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  *   2. Redistributions in binary form must reproduce the above copyright notice,+
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  *      this list of conditions and the following disclaimer in the documentation+
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  *      and/or other materials provided with the distribution.+
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  *   3. Neither the name of STMicroelectronics nor the names of its contributors+
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  *      may be used to endorse or promote products derived from this software+
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  *      without specific prior written permission.+
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  *+
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  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"+
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  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE+
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  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE+
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  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE+
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  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL+
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  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR+
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  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER+
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  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,+
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  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE+
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  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.+
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  *+
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  ******************************************************************************+
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  */+
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#if defined(USE_FULL_LL_DRIVER)+
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+
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/* Includes ------------------------------------------------------------------*/+
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#include "stm32f4xx_ll_i2c.h"+
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#include "stm32f4xx_ll_bus.h"+
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#include "stm32f4xx_ll_rcc.h"+
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#ifdef  USE_FULL_ASSERT+
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#include "stm32_assert.h"+
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#else+
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#define assert_param(expr) ((void)0U)+
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#endif+
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+
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/** @addtogroup STM32F4xx_LL_Driver+
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  * @{+
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  */+
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+
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#if defined (I2C1) || defined (I2C2) || defined (I2C3)+
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+
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/** @defgroup I2C_LL I2C+
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  * @{+
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  */+
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+
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/* Private types -------------------------------------------------------------*/+
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/* Private variables ---------------------------------------------------------*/+
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/* Private constants ---------------------------------------------------------*/+
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/* Private macros ------------------------------------------------------------*/+
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/** @addtogroup I2C_LL_Private_Macros+
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  * @{+
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  */+
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+
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#define IS_LL_I2C_PERIPHERAL_MODE(__VALUE__)    (((__VALUE__) == LL_I2C_MODE_I2C)          || \+
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                                                 ((__VALUE__) == LL_I2C_MODE_SMBUS_HOST)   || \+
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                                                 ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE) || \+
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                                                 ((__VALUE__) == LL_I2C_MODE_SMBUS_DEVICE_ARP))+
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+
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#define IS_LL_I2C_CLOCK_SPEED(__VALUE__)        (((__VALUE__) > 0U) && ((__VALUE__) <= LL_I2C_MAX_SPEED_FAST))+
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+
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#define IS_LL_I2C_DUTY_CYCLE(__VALUE__)         (((__VALUE__) == LL_I2C_DUTYCYCLE_2) || \+
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                                                 ((__VALUE__) == LL_I2C_DUTYCYCLE_16_9))+
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+
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#if  defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)+
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#define IS_LL_I2C_ANALOG_FILTER(__VALUE__)      (((__VALUE__) == LL_I2C_ANALOGFILTER_ENABLE) || \+
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                                                 ((__VALUE__) == LL_I2C_ANALOGFILTER_DISABLE))+
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+
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#define IS_LL_I2C_DIGITAL_FILTER(__VALUE__)     ((__VALUE__) <= 0x0000000FU)+
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+
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#endif+
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#define IS_LL_I2C_OWN_ADDRESS1(__VALUE__)       ((__VALUE__) <= 0x000003FFU)+
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+
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#define IS_LL_I2C_TYPE_ACKNOWLEDGE(__VALUE__)   (((__VALUE__) == LL_I2C_ACK) || \+
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                                                 ((__VALUE__) == LL_I2C_NACK))+
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+
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#define IS_LL_I2C_OWN_ADDRSIZE(__VALUE__)       (((__VALUE__) == LL_I2C_OWNADDRESS1_7BIT) || \+
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                                                 ((__VALUE__) == LL_I2C_OWNADDRESS1_10BIT))+
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/**+
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  * @}+
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  */+
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+
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/* Private function prototypes -----------------------------------------------*/+
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+
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/* Exported functions --------------------------------------------------------*/+
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/** @addtogroup I2C_LL_Exported_Functions+
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  * @{+
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  */+
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+
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/** @addtogroup I2C_LL_EF_Init+
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  * @{+
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  */+
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+
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/**+
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  * @brief  De-initialize the I2C registers to their default reset values.+
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  * @param  I2Cx I2C Instance.+
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  * @retval An ErrorStatus enumeration value:+
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  *          - SUCCESS: I2C registers are de-initialized+
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  *          - ERROR: I2C registers are not de-initialized+
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  */+
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uint32_t LL_I2C_DeInit(I2C_TypeDef *I2Cx)+
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{+
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  ErrorStatus status = SUCCESS;+
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+
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  /* Check the I2C Instance I2Cx */+
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  assert_param(IS_I2C_ALL_INSTANCE(I2Cx));+
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+
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  if (I2Cx == I2C1)+
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  {+
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    /* Force reset of I2C clock */+
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    LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C1);+
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+
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    /* Release reset of I2C clock */+
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    LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C1);+
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  }+
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  else if (I2Cx == I2C2)+
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  {+
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    /* Force reset of I2C clock */+
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    LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C2);+
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+
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    /* Release reset of I2C clock */+
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    LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C2);+
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+
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  }+
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#if defined(I2C3)+
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  else if (I2Cx == I2C3)+
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  {+
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    /* Force reset of I2C clock */+
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    LL_APB1_GRP1_ForceReset(LL_APB1_GRP1_PERIPH_I2C3);+
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+
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    /* Release reset of I2C clock */+
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    LL_APB1_GRP1_ReleaseReset(LL_APB1_GRP1_PERIPH_I2C3);+
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  }+
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#endif+
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  else+
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  {+
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    status = ERROR;+
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  }+
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+
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  return status;+
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}+
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+
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/**+
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  * @brief  Initialize the I2C registers according to the specified parameters in I2C_InitStruct.+
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  * @param  I2Cx I2C Instance.+
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  * @param  I2C_InitStruct pointer to a @ref LL_I2C_InitTypeDef structure.+
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  * @retval An ErrorStatus enumeration value:+
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  *          - SUCCESS: I2C registers are initialized+
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  *          - ERROR: Not applicable+
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  */+
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uint32_t LL_I2C_Init(I2C_TypeDef *I2Cx, LL_I2C_InitTypeDef *I2C_InitStruct)+
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{+
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  LL_RCC_ClocksTypeDef rcc_clocks;+
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+
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  /* Check the I2C Instance I2Cx */+
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  assert_param(IS_I2C_ALL_INSTANCE(I2Cx));+
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+
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  /* Check the I2C parameters from I2C_InitStruct */+
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  assert_param(IS_LL_I2C_PERIPHERAL_MODE(I2C_InitStruct->PeripheralMode));+
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  assert_param(IS_LL_I2C_CLOCK_SPEED(I2C_InitStruct->ClockSpeed));+
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  assert_param(IS_LL_I2C_DUTY_CYCLE(I2C_InitStruct->DutyCycle));+
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#if  defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)+
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  assert_param(IS_LL_I2C_ANALOG_FILTER(I2C_InitStruct->AnalogFilter));+
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  assert_param(IS_LL_I2C_DIGITAL_FILTER(I2C_InitStruct->DigitalFilter));+
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#endif+
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  assert_param(IS_LL_I2C_OWN_ADDRESS1(I2C_InitStruct->OwnAddress1));+
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  assert_param(IS_LL_I2C_TYPE_ACKNOWLEDGE(I2C_InitStruct->TypeAcknowledge));+
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  assert_param(IS_LL_I2C_OWN_ADDRSIZE(I2C_InitStruct->OwnAddrSize));+
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+
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  /* Disable the selected I2Cx Peripheral */+
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  LL_I2C_Disable(I2Cx);+
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+
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  /* Retrieve Clock frequencies */+
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  LL_RCC_GetSystemClocksFreq(&rcc_clocks);+
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+
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#if  defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)+
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  /*---------------------------- I2Cx FLTR Configuration -----------------------+
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   * Configure the analog and digital noise filters with parameters :+
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   * - AnalogFilter: I2C_FLTR_ANFOFF bit+
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   * - DigitalFilter: I2C_FLTR_DNF[3:0] bits+
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   */+
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  LL_I2C_ConfigFilters(I2Cx, I2C_InitStruct->AnalogFilter, I2C_InitStruct->DigitalFilter);+
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+
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#endif+
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  /*---------------------------- I2Cx SCL Clock Speed Configuration ------------+
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   * Configure the SCL speed :+
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   * - ClockSpeed: I2C_CR2_FREQ[5:0], I2C_TRISE_TRISE[5:0], I2C_CCR_FS,+
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   *           and I2C_CCR_CCR[11:0] bits+
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   * - DutyCycle: I2C_CCR_DUTY[7:0] bits+
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   */+
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  LL_I2C_ConfigSpeed(I2Cx, rcc_clocks.PCLK1_Frequency, I2C_InitStruct->ClockSpeed, I2C_InitStruct->DutyCycle);+
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+
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  /*---------------------------- I2Cx OAR1 Configuration -----------------------+
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   * Disable, Configure and Enable I2Cx device own address 1 with parameters :+
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   * - OwnAddress1:  I2C_OAR1_ADD[9:8], I2C_OAR1_ADD[7:1] and I2C_OAR1_ADD0 bits+
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   * - OwnAddrSize:  I2C_OAR1_ADDMODE bit+
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   */+
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  LL_I2C_SetOwnAddress1(I2Cx, I2C_InitStruct->OwnAddress1, I2C_InitStruct->OwnAddrSize);+
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+
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  /*---------------------------- I2Cx MODE Configuration -----------------------+
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  * Configure I2Cx peripheral mode with parameter :+
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   * - PeripheralMode: I2C_CR1_SMBUS, I2C_CR1_SMBTYPE and I2C_CR1_ENARP bits+
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   */+
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  LL_I2C_SetMode(I2Cx, I2C_InitStruct->PeripheralMode);+
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+
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  /* Enable the selected I2Cx Peripheral */+
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  LL_I2C_Enable(I2Cx);+
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+
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  /*---------------------------- I2Cx CR2 Configuration ------------------------+
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   * Configure the ACKnowledge or Non ACKnowledge condition+
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   * after the address receive match code or next received byte with parameter :+
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   * - TypeAcknowledge: I2C_CR2_NACK bit+
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   */+
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  LL_I2C_AcknowledgeNextData(I2Cx, I2C_InitStruct->TypeAcknowledge);+
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+
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  return SUCCESS;+
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}+
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+
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/**+
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  * @brief  Set each @ref LL_I2C_InitTypeDef field to default value.+
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  * @param  I2C_InitStruct Pointer to a @ref LL_I2C_InitTypeDef structure.+
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  * @retval None+
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  */+
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void LL_I2C_StructInit(LL_I2C_InitTypeDef *I2C_InitStruct)+
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{+
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  /* Set I2C_InitStruct fields to default values */+
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  I2C_InitStruct->PeripheralMode  = LL_I2C_MODE_I2C;+
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  I2C_InitStruct->ClockSpeed      = 5000U;+
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  I2C_InitStruct->DutyCycle       = LL_I2C_DUTYCYCLE_2;+
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#if  defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)+
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  I2C_InitStruct->AnalogFilter    = LL_I2C_ANALOGFILTER_ENABLE;+
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  I2C_InitStruct->DigitalFilter   = 0U;+
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#endif+
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  I2C_InitStruct->OwnAddress1     = 0U;+
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  I2C_InitStruct->TypeAcknowledge = LL_I2C_NACK;+
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  I2C_InitStruct->OwnAddrSize     = LL_I2C_OWNADDRESS1_7BIT;+
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}+
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+
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/**+
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  * @}+
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  */+
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+
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/**+
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  * @}+
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  */+
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+
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/**+
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  * @}+
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  */+
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+
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#endif /* I2C1 || I2C2 || I2C3 */+
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+
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/**+
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  * @}+
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  */+
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+
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#endif /* USE_FULL_LL_DRIVER */+
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+
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/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/+
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