Fork JTMK PUO Tech Creavery
Dependencies: C12832_lcd LM75B USBDevice mbed
Fork of app-board-TempAlarm by
Diff: main.cpp
- Revision:
- 4:d9371152f77a
- Parent:
- 3:4d612f16ad84
- Child:
- 5:05597fda1a26
--- 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 } - }