File content as of revision 0:966ecf8af5b3:

#include "mbed.h"
//Assignment 5, Exercise 1
//Author: Michael Antonucci
//Date Modified: 11/15/22
 
DigitalOut LEDOut1(LED1); //digital output to LED1
DigitalOut LEDOut2(LED2); //digital output to LED2
DigitalOut LEDOut3(LED3); //digital output to LED3
DigitalOut LEDOut4(LED4); //digital output to LED4
Timer out_timer; //timer
AnalogIn therm(p19); //thermistor
AnalogIn photo(p20); //photocell
Serial pc(USBTX, USBRX);
 
DigitalOut myled(LED1);

float thermistor_volt(AnalogIn therm)
{
    float temp_v; // thermistor voltage
        temp_v=therm.read()*3.3; // thermistor output
        return temp_v;
}

float photocell_resistance(AnalogIn photo)
{
    float photo_v;
        photo_v=photo.read()*3.3; // photocell output
        if (photo_v<1.8) { 
            LEDOut4=1; 
        } else {
            LEDOut4=0;
        }
        return photo_v;
}

float thermistor_temp(AnalogIn therm)
{
    float temp;
        temp= -1481.96+sqrt((2196200)+((1.8639-(3.3*therm.read()))/0.00000388)); // voltage to degrees C

        if(temp>=13) { 
            LEDOut1=1;
        } else {
            LEDOut1=0;
        }
        if(temp>=20) { 
            LEDOut2=1; 
        } else {
            LEDOut2=0;
        }
        if(temp>=27) { 
            LEDOut3=1; 
        } else {
            LEDOut3=0; 
        }
        return temp;
}
 
int main()
{
    DigitalOut LEDOut1(LED1); //digital output to LED1
    DigitalOut LEDOut2(LED2); //digital output to LED2
    DigitalOut LEDOut3(LED3); //digital output to LED3
    DigitalOut LEDOut4(LED4); //digital output to LED4
    float temp; // temperature, thermistor
    float temp_v; // voltage of thermistor
    float photo_v; // voltage of photocell

    while(1) {
        temp = thermistor_temp(therm);
        temp_v = thermistor_volt(therm);
        photo_v = photocell_resistance(photo);
        out_timer.start();
 
        if(out_timer.read()>1) {
            pc.printf("Thermistor Voltage: %f Volts \r\n Temperature: %f Celsius \r\n Photocell Voltage: %f Volts \r\n ",temp_v,temp,photo_v);
            out_timer.reset();
        }
    }
}