Hi! Please consider the following code:
unsigned int beta;
unsigned int theta;
unsigned int m = 4;
unsigned int c = 986;
unsigned int Rpre = 49900;
unsigned int getUAnalog(unsigned char channel) // to get the PT1000 Signal
unsigned int result;
unsigned int f_temp;
//select channel and initiate conversion
ADCSC1 |= (channel & 0b11111);
//wait until conversion is complete
f_temp = ADCRH;
f_temp <<= 8;
f_temp += ADCRL;
beta = (((f_temp) / (4096*28))*1000); // warning: possible loss of data.
theta = ((((beta)*(Rpre))/(1-beta))*1000);
result = (theta-c)/(m);
I am using MC9S08DZ60 (http://www.freescale.com/files/microcontrollers/doc/data_sheet/MC9S08DZ60.pdf) with PT1000-Temperature Sensor on CodeWarrior version 5.9.0 . This function is meant to calculate the temp and return "result". But the "beta" and "theta" values remain 0. No Change.
Also i get the warning as C2705: Possible Loss of Data. The value of "result" is not right. PLease help as i dont have clue of what going wrong!!
Thanks in advance!