//==============================================================================
int main(void)
//==============================================================================
{ // variables
u8t error = 0; //variable for error code. For codes see system.h
// u8t userRegister; //variable for user register
// bt endOfBattery; //variable for end of battery
nt16 sRH; //variable for raw humidity ticks
ft humidityRH; //variable for relative humidity[%RH] as float
nt16 sT; //variable for raw temperature ticks
ft temperatureC; //variable for temperature[°C] as float
//u8t SerialNumber_SHT2x[8]; //64bit serial number
Grace_init();
//Init_HW(); //initializes Hardware (osc, watchdog,...)
I2c_Init(); //initializes uC-ports for I2C
DelayMicroSeconds(15000); //wait for sensor initialization t_powerUp (15ms)
//note: The following code segments show how to use the different functions
// of SHT2x. The loop does not show a typical sequence in an application
while(1)
{ error = 0; // reset error status
/* // --- Reset sensor by command ---
error |= SHT2x_SoftReset();
// --- Read the sensors serial number (64bit) ---
error |= SHT2x_GetSerialNumber(SerialNumber_SHT2x);
// --- Set Resolution e.g. RH 10bit, Temp 13bit ---
error |= SHT2x_ReadUserRegister(&userRegister); //get actual user reg
userRegister = (userRegister & ~SHT2x_RES_MASK) | SHT2x_RES_10_13BIT;
error |= SHT2x_WriteUserRegister(&userRegister); //write changed user reg
*/
// --- measure humidity with "Polling Mode" (no hold master) ---
error |= SHT2x_MeasurePoll(HUMIDITY, &sRH);
// --- measure temperature with "Polling Mode" (no hold master) ---
error |= SHT2x_MeasurePoll(TEMP, &sT);
//-- calculate humidity and temperature --
temperatureC = SHT2x_CalcTemperatureC(sT.u16);
humidityRH = SHT2x_CalcRH(sRH.u16);
/* // --- check end of battery status (eob)---
// note: a RH / Temp. measurement must be executed to update the status of eob
error |= SHT2x_ReadUserRegister(&userRegister); //get actual user reg
if( (userRegister & SHT2x_EOB_MASK) == SHT2x_EOB_ON ) endOfBattery = true;
else endOfBattery = false;
*/
}
}
uint8_t getTH(uint8_t *humidity, float *temperature) {
uint8_t error;
uint16_t raw;
error = SHT2x_MeasurePoll(HUMIDITY, &raw);
if (error) {
*humidity = 255;
} else {
*humidity = (uint8_t) (SHT2x_CalcRH(raw) + 0.5);
}
error |= SHT2x_MeasurePoll(TEMP, &raw);
if (error) {
*temperature = 255;
} else {
*temperature = SHT2x_CalcTemperatureC(raw);
}
return error;
}
