Diff: main.cpp

Revision:

1:448ff9efcefa

Parent:

0:cd8526d38aea

Child:

2:2ff3b0d8c52e

--- a/main.cpp	Fri Nov 20 15:14:39 2020 +0000
+++ b/main.cpp	Fri Dec 11 15:38:14 2020 +0000
@@ -5,31 +5,64 @@
 
 #include "mbed.h"
 #include "platform/mbed_thread.h"
-
+#include "stdio.h"
 
 // Blinking rate in milliseconds
 #define BLINKING_RATE_MS 500
 #define SW2 P0_4
 // #define alsOut P10_0
 
-
-
-int main()
-{
+//Global variables
+char buffer[80];
     // Initialise the digital pin LED1 as an output
     DigitalOut led(LED1);
     DigitalIn pushButton(SW2, PullUp);
     DigitalOut thermVcc(P10_3);
     DigitalOut thermGnd(P10_0);
     AnalogIn thermVal(P10_1);
-   
-    thermVcc = 1; 
-    thermGnd = 0; 
+    AnalogIn lightLevel(P10_4);
+    
+    /* Data Structures */
+    
+    struct dataSet {
+        float highTempThresh;
+        float lowTempThresh;
+        float ambientTemp;
+        float highLightThresh;
+        float lowLightThresh;
+        float ambientLight;
+        } myData;
+    
+/* prototype of function */
+void displayAt( int y, int x, char *buffer );
+void initialise();
+void readSensors();
+void displayData();
+
+int main()
+{
+   initialise(); // function to setup VT100 display
+
+/******************************************************************************************
+*
+* Main loop:=
+*
+* flash status led
+* read sensors
+* display data read from the sensors and threshold values
+* sleep for 0.5seconds
+*
+*******************************************************************************************/
+
     while (true) {
-        if (pushButton == 0)
-        {
-        led=!led;
-        /*read thermistor Voltage*/ 
+        led=!led; // flashing status signal
+        readSensors();
+        displayData();
+        thread_sleep_for(BLINKING_RATE_MS);
+        }
+}
+void readSensors() {
+/*read thermistor Voltage*/ 
             float refVoltage = thermVal.read() * 2.4;// Range of ADC 0->2*Vref
             float refCurrent = refVoltage / 10000.0; //10k Reference Resistor
             float therVoltage = 3.3 - refVoltage; // Assume supply voltage is 3.3v
@@ -39,11 +72,25 @@
             /*Calculate temperature from the resistance of thermistor using Steinhart-Hart Equation*/
             float stEqn = (float32_t) ((0.0009032679) + ((0.000248772) * logrT) + ((2.041094E-07) * pow((float64)logrT, (float32)3)));
                                      
-            float temperatureC = (float32_t)(((1.0 / stEqn) - 273.15) + 0.5); 
+            myData.ambientTemp = (float32_t)(((1.0 / stEqn) - 273.15) + 0.5); 
+            myData.ambientLight = lightLevel.read() * 100;     
+}
+void displayData() {                   
+            sprintf(buffer, "Temerpature is %2.1f C", myData.ambientTemp);
+            displayAt (1, 3, buffer);
             
-                        
-            printf("Temerpature is %f C\r\n", temperatureC);
-            }
-        thread_sleep_for(BLINKING_RATE_MS);
+            sprintf( buffer, "Ambient Light is: %3.1f%c", myData.ambientLight, 0x25 );
+            displayAt(1,4, buffer);
+    }
+void displayAt( int y, int x, char *buffer ) {
+    printf("\033[%d;%dH%s", y, x, buffer);
+    fflush(stdout);
     }
-}
+    
+void initialise() {
+   printf("\033[2J\033[H"); // clear screen and move the cursor to 0, 0
+   printf("\033[?25l"); // Turn off visable cursor
+   fflush(stdout); // send the codes to the terminal
+   printf("Environmental Control System");
+   // printf( "|033[34m" );
+   }
\ No newline at end of file