/**
* @brief Set HTS221 Initialization
* @param HTS221_Init the configuration setting for the HTS221
* @retval HUM_TEMP_OK in case of success, an error code otherwise
*/
static HUM_TEMP_StatusTypeDef HTS221_Init(HUM_TEMP_InitTypeDef *HTS221_Init)
{
uint8_t tmp = 0x00;
/* Configure the low level interface ---------------------------------------*/
if(HTS221_IO_Init() != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
if(HTS221_Power_On() != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
if(HTS221_Calibration() != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
////////////////////////////////////////////////////////////////////////////////
if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_RES_CONF_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
/* Resolution Register */
tmp &= ~(HTS221_H_RES_MASK);
tmp |= HTS221_Init->Humidity_Resolutin;
tmp &= ~(HTS221_T_RES_MASK);
tmp |= HTS221_Init->Temperature_Resolution;
if(HTS221_IO_Write(&tmp, HTS221_ADDRESS, HTS221_RES_CONF_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
//////////////////////////////////////////////////////////////////////////////////
if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
/* Output Data Rate selection */
tmp &= ~(HTS221_ODR_MASK);
tmp |= HTS221_Init->OutputDataRate;
if(HTS221_IO_Write(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
return HUM_TEMP_OK;
}
/**
* @brief Read HTS221 output register, and calculate the temperature
* @param pfData the pointer to data output
* @retval HUM_TEMP_OK in case of success, an error code otherwise
*/
static HUM_TEMP_StatusTypeDef HTS221_GetTemperature(float* pfData)
{
int16_t T_out, temperature_t;
uint8_t tempReg[2] = {0, 0};
uint8_t tmp = 0x00;
float T_degC;
if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
/* Output Data Rate selection */
tmp &= (HTS221_ODR_MASK);
if(tmp == 0x00)
{
if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
/* Serial Interface Mode selection */
tmp &= ~(HTS221_ONE_SHOT_MASK);
tmp |= HTS221_ONE_SHOT_START;
if(HTS221_IO_Write(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
do
{
if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_STATUS_REG_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
}
while(!(tmp && 0x01));
}
if(HTS221_IO_Read(&tempReg[0], HTS221_ADDRESS, (HTS221_TEMP_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD),
2) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
T_out = ((((int16_t)tempReg[1]) << 8) + (int16_t)tempReg[0]);
T_degC = ((float)(T_out - T0_out)) / (T1_out - T0_out) * (T1_degC - T0_degC) + T0_degC;
temperature_t = (int16_t)(T_degC * pow(10, TEMP_DECIMAL_DIGITS));
*pfData = ((float)temperature_t) / pow(10, TEMP_DECIMAL_DIGITS);
return HUM_TEMP_OK;
}
/**
* @brief Enter the shutdown mode for HTS221
* @retval HUM_TEMP_OK in case of success, an error code otherwise
*/
static HUM_TEMP_StatusTypeDef HTS221_Power_OFF(void)
{
uint8_t tmpReg;
/* Read the register content */
if(HTS221_IO_Read(&tmpReg, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
/* Reset the power down bit */
tmpReg &= ~(HTS221_MODE_ACTIVE);
/* Write register */
if(HTS221_IO_Write(&tmpReg, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
return HUM_TEMP_OK;
}
/**
* @brief Reboot memory content of HTS221
* @retval HUM_TEMP_OK in case of success, an error code otherwise
*/
static HUM_TEMP_StatusTypeDef HTS221_RebootCmd(void)
{
uint8_t tmpreg;
/* Read CTRL_REG2 register */
if(HTS221_IO_Read(&tmpreg, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
/* Enable or Disable the reboot memory */
tmpreg |= HTS221_BOOT_REBOOTMEMORY;
/* Write value to MEMS CTRL_REG2 regsister */
if(HTS221_IO_Write(&tmpreg, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
return HUM_TEMP_OK;
}
/**
* @brief Set HTS221 Initialization
* @param HTS221_Init the configuration setting for the HTS221
* @retval HUM_TEMP_OK in case of success, an error code otherwise
*/
static HUM_TEMP_StatusTypeDef HTS221_Init(HUM_TEMP_InitTypeDef *HTS221_Init)
{
uint8_t tmp = 0x00;
/* Configure the low level interface ---------------------------------------*/
/* I2C1 already configured in MX_I2C1_Init - JBD */
// if(HTS221_IO_Init() != HUM_TEMP_OK)
// {
// return HUM_TEMP_ERROR;
// }
if(HTS221_Power_On() != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
if(HTS221_Calibration() != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
/* Output Data Rate selection */
tmp &= ~(HTS221_ODR_MASK);
tmp |= HTS221_Init->OutputDataRate;
if(HTS221_IO_Write(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
HTS221_IO_ITConfig();
return HUM_TEMP_OK;
}
/**
* @brief Read HTS221 output register, and calculate the humidity
* @param pfData the pointer to data output
* @retval HUM_TEMP_OK in case of success, an error code otherwise
*/
static HUM_TEMP_StatusTypeDef HTS221_GetHumidity(float* pfData)
{
int16_t H_T_out, humidity_t;
uint8_t tempReg[2] = {0, 0};
uint8_t tmp = 0x00;
float H_rh;
if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG1_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
/* Output Data Rate selection */
tmp &= (HTS221_ODR_MASK);
if(tmp == 0x00)
{
if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
/* Serial Interface Mode selection */
tmp &= ~(HTS221_ONE_SHOT_MASK);
tmp |= HTS221_ONE_SHOT_START;
if(HTS221_IO_Write(&tmp, HTS221_ADDRESS, HTS221_CTRL_REG2_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
do
{
if(HTS221_IO_Read(&tmp, HTS221_ADDRESS, HTS221_STATUS_REG_ADDR, 1) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
}
while(!(tmp && 0x02));
}
if(HTS221_IO_Read(&tempReg[0], HTS221_ADDRESS, (HTS221_HUMIDITY_OUT_L_ADDR | HTS221_I2C_MULTIPLEBYTE_CMD),
2) != HUM_TEMP_OK)
{
return HUM_TEMP_ERROR;
}
H_T_out = ((((int16_t)tempReg[1]) << 8) + (int16_t)tempReg[0]);
H_rh = ( float )(((( H_T_out - H0_T0_out ) * ( H1_rh - H0_rh )) / ( H1_T0_out - H0_T0_out )) + H0_rh );
// Truncate to specific number of decimal digits
humidity_t = (uint16_t)(H_rh * pow(10, HUM_DECIMAL_DIGITS));
*pfData = ((float)humidity_t) / pow(10, HUM_DECIMAL_DIGITS);
// Prevent data going below 0% and above 100% due to linear interpolation
if ( *pfData < 0.0f ) *pfData = 0.0f;
if ( *pfData > 100.0f ) *pfData = 100.0f;
return HUM_TEMP_OK;
}
