Diff: main.cpp

Revision:

4:d9371152f77a

Parent:

3:4d612f16ad84

--- a/main.cpp	Fri Oct 26 21:42:06 2012 +0000
+++ b/main.cpp	Sun Sep 22 17:50:35 2013 +0000
@@ -2,17 +2,43 @@
 #include "LM75B.h"
 #include "C12832_lcd.h"
 
-C12832_LCD lcd;
-LM75B tmp(p28,p27);
+C12832_LCD lcd; //Graphics LCD
+LM75B tmp(p28,p27); //I2C Temperature Sensor
+PwmOut r(p23); //RGB LED with 3 PWM outputs for dimmer control
+PwmOut g(p24);
+PwmOut b(p25);
+PwmOut speaker(p26); //Speaker with PWM driver
+AnalogIn pot1(p19); //Reads Pot 1 - near LCD
+AnalogIn pot2(p20); //Reads Pot 2 - near RGB LED
+Serial pc(USBTX,USBRX); //used for printf to PC over USB
 
 int main ()
 {
+    float board_temp;
+    float alarm_temp = 0.0;
+    // generate a 800Hz tone using PWM hardware output
+    speaker.period(1.0/800.0); // 800hz period
+    r=1.0; //RGB LED off - PWM 100% duty cycle
+    g=1.0;
+    b=1.0;
 
     while (1) {
         lcd.cls();
-        lcd.locate(0,3);
-        lcd.printf("%.2f\n",tmp.read());
+        lcd.locate(0,0); //clears LCD
+        board_temp = tmp; //read temperature
+        lcd.printf("Board Temperature = %.2f\n\r",board_temp);
+        alarm_temp = 50.0 * pot1; //read alarm temp
+        lcd.printf("Temp Alarm Setting = %.2f\n\r",alarm_temp);
+        if(board_temp > alarm_temp) { //check temp for alarm
+            r = 1.0 - pot2; //RGB LED red
+            g = 1.0;
+            speaker = 0.5; //alarm tone using PWM
+        } else {
+            g = 1.0 - pot2; //RGB LED green
+            r = 1.0;
+            speaker = 0.0;
+        }
         wait(1.0);
+        pc.printf("%.2f\n\r",board_temp); //send temp to PC
     }
-
 }