/**
* @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)
{
uint32_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_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);
/* Get the old register value */
tmpreg = hi2c->Instance->CR1;
/* Reset I2Cx DNF bits [11:8] */
tmpreg &= ~(I2C_CR1_DFN);
/* Set I2Cx DNF coefficient */
tmpreg |= DigitalFilter << 8;
/* Store the new register value */
hi2c->Instance->CR1 = tmpreg;
__HAL_I2C_ENABLE(hi2c);
hi2c->State = HAL_I2C_STATE_READY;
/* Process Unlocked */
__HAL_UNLOCK(hi2c);
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_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;
}
}
