Revision 0:966ecf8af5b3, committed 23 months ago

Comitter:

michael_antonucci

Date:

Wed Nov 16 04:54:57 2022 +0000

Commit message:

Fully working code for thermistor and photocell using functions

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Nov 16 04:54:57 2022 +0000
@@ -0,0 +1,80 @@
+#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();
+        }
+    }
+}
\ No newline at end of file

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed.bld	Wed Nov 16 04:54:57 2022 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/users/mbed_official/code/mbed/builds/65be27845400
\ No newline at end of file