jim hamblen / Mbed 2 deprecated app-board-TempAlarm

This demo uses the application board’s I2C temperature sensor to measure the board’s temperature. Pot 1 (blue dial near LCD) is used to adjust a temperature alarm setting. Alarm uses speaker and RGB LED.

Dependencies:   C12832_lcd LM75B mbed

Fork of app-board-LM75B by Chris Styles

Files at this revision

API Documentation at this revision

Revision 4:d9371152f77a, committed 2013-09-22

Comitter:
4180_1
Date:
Sun Sep 22 17:50:35 2013 +0000
Parent:
3:4d612f16ad84
Commit message:
ver 1.0 see https://mbed.org/users/4180_1/notebook/mbed-application-board-hands-on-demos/

Changed in this revision

C12832_lcd.lib Show annotated file Show diff for this revision Revisions of this file
LM75B.lib Show annotated file Show diff for this revision Revisions of this file
main.cpp Show annotated file Show diff for this revision Revisions of this file
mbed.bld Show annotated file Show diff for this revision Revisions of this file 
--- a/C12832_lcd.lib	Fri Oct 26 21:42:06 2012 +0000
+++ b/C12832_lcd.lib	Sun Sep 22 17:50:35 2013 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/dreschpe/code/C12832_lcd/#468cdccff7af
+http://mbed.org/users/dreschpe/code/C12832_lcd/#c9afe58d786a

--- a/LM75B.lib	Fri Oct 26 21:42:06 2012 +0000
+++ b/LM75B.lib	Sun Sep 22 17:50:35 2013 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/chris/code/LM75B/#6a70c9303bbe
+https://mbed.org/users/neilt6/code/LM75B/#fc27dc535ea9

--- 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
     }
-
 }

--- a/mbed.bld	Fri Oct 26 21:42:06 2012 +0000
+++ b/mbed.bld	Sun Sep 22 17:50:35 2013 +0000
@@ -1,1 +1,1 @@
-http://mbed.org/users/mbed_official/code/mbed/builds/49a220cc26e0
+http://mbed.org/users/mbed_official/code/mbed/builds/a9913a65894f
\ No newline at end of file