/**********************************
* Function : WORD ReadTemperature(BYTE sensor)
* This function have a reading adc values.
* The parameter sensor's type shows in below.
* ADC_PHOTODIODE(0x01) : photodiode adc value
* ADC_CHAMBER(0x02) : chamber temperature adc value
* ADC_HEATSINK(0x03) : heatsink temperature adc value
* The returned value is sampled in SAMPLING_COUNT times.
**********************************/
WORD ReadTemperature(BYTE sensor)
{
WORD w;
BYTE low=0x00;
BYTE high=0x00;
BYTE counter = SAMPLING_COUNT; // multiple adc sampling
WORD sum=0;
// Select the ADC Channel by parameter.
// The ADC Channel information shows in HardwareProfile -PICDEM FSUSB.h file.
switch(sensor)
{
case ADC_PHOTODIODE:
SetADCChannel(Sensor_Photodiode);
break;
case ADC_CHAMBER:
SetADCChannel(Sensor_Chamber);
break;
case ADC_HEATSINK:
SetADCChannel(Sensor_Heatsink);
break;
}
while(counter--)
{
while(ADCON0bits.NOT_DONE); // Wait for busy
ADCON0bits.GO = 1; // Start AD conversion
while(ADCON0bits.NOT_DONE); // Wait for conversion
low = ADRESL;
high = ADRESH;
w = (WORD)high*256 + (WORD)low;
sum += w;
}
w = sum/SAMPLING_COUNT;
return w;
}
int main(void) //main body calls all other functions to initialize the proper values of the Transmission protocol, timer and ADC module, then starts them
{
InitialzeLCD(); //initializes LCD
SetADCChannel(5); // sets ADC channel for temperature sensor
InitADC(); // Initializes ADC and timer below to 1 second
InitTimer();
startTimer();
startADC();
while(1)
{
// Main loop
}
}
