main.cpp

00001 #include "mbed.h"
00002 #include "SHT2x.h"
00003 
00004 SHT2x sht21(p9, p10);
00005 
00006 DigitalOut myled(LED2);
00007 Serial pc(USBTX, USBRX);
00008 
00009 int rh, temp;
00010 int error;
00011 float relHumidity, temperature;
00012 int userRegister;
00013 
00014 int main() {
00015     sht21.SHT2x_SoftReset();
00016     
00017     error |= sht21.SHT2x_ReadUserRegister(&userRegister);  //get actual user reg
00018     userRegister = (userRegister & ~SHT2x_RES_MASK) | SHT2x_RES_12_14BIT;
00019     error |= sht21.SHT2x_WriteUserRegister(&userRegister); //write changed user reg    
00020     
00021     while (1) {
00022         myled = 1;
00023         
00024         pc.printf("program start\r\n");
00025         error |= sht21.SHT2x_MeasureHM(HUMIDITY, &rh);
00026         error |= sht21.SHT2x_MeasureHM(TEMP, &temp);
00027         
00028         if (error > 0)
00029             pc.printf("error code %d \r\n", error);
00030 
00031         relHumidity = sht21.SHT2x_CalcRH(rh);
00032         temperature = sht21.SHT2x_CalcTemperatureC(temp);
00033         
00034         pc.printf("RH value -> %f \r\n", relHumidity);
00035         pc.printf("Temp in C -> %f \r\n", temperature);
00036         pc.printf("Dew point %f \r\n", sht21.SHT2x_GetDewpoint(relHumidity, temperature));
00037 
00038         myled = 0;
00039         wait(1);
00040     }
00041 }