stm32f4xx_hal_i2c_ex.c

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/* Includes ------------------------------------------------------------------*/
#include "stm32f4xx_hal.h"
 
#ifdef HAL_I2C_MODULE_ENABLED
 
#if  defined(I2C_FLTR_ANOFF)&&defined(I2C_FLTR_DNF)
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Exported functions --------------------------------------------------------*/
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;
  }
}
 
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
 
#endif /* HAL_I2C_MODULE_ENABLED */