/** * @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 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_BUSY) || (hi2c->State == HAL_I2C_STATE_MASTER_BUSY_TX) || (hi2c->State == HAL_I2C_STATE_MASTER_BUSY_RX) || (hi2c->State == HAL_I2C_STATE_SLAVE_BUSY_TX) || (hi2c->State == HAL_I2C_STATE_SLAVE_BUSY_RX)) { return HAL_BUSY; } /* Process Locked */ __HAL_LOCK(hi2c); hi2c->State = HAL_I2C_STATE_BUSY; /* Disable the selected I2C peripheral */ __HAL_I2C_DISABLE(hi2c); /* Reset I2Cx ANOFF bit */ hi2c->Instance->CR1 &= ~(I2C_CR1_ANFOFF); /* Set analog filter bit*/ hi2c->Instance->CR1 |= AnalogFilter; __HAL_I2C_ENABLE(hi2c); hi2c->State = HAL_I2C_STATE_READY; /* Process Unlocked */ __HAL_UNLOCK(hi2c); return HAL_OK; }