main.cpp

00001 //Sample Code for EET214 Lab3 Thermostat
00002 
00003 #include "mbed.h"
00004 
00005 DigitalOut furnace(LED4);  //use LED4 to simualte furnace
00006 AnalogIn room_T(p20);   //Use pin 20 to read room temperature
00007 int iRoom_T = 0;        //Room Temperature in integer 
00008 int iRoom_T_One = 0;    //Temperature number at one digit
00009 int iRoom_T_Ten = 0;    //Temperature number at ten digit
00010 
00011 int display10( int iRoom_T_Ten);  //Function to display ten digits
00012 int display1( int iRoom_T_One);   //Function to display one digits
00013 
00014 BusOut displayA(p5, p6, p7, p8, p9, p10, p11, p12);  //Use P5 - P12 for Display 1
00015 BusOut displayB(p21,p22,p23,p24,p25,p26, p27, p28);  //Use P21- P28 for display 2
00016 
00017 int main() {
00018     while(1) {
00019         
00020         //Read sensor and convert the value into integer
00021         iRoom_T = (int)(( room_T * 3.3 ) /0.01 );  
00022         iRoom_T = 21;  //Testing code
00023         
00024         //Display Room Temperature       
00025         iRoom_T_Ten = iRoom_T / 10;  //Get number at ten digits
00026         iRoom_T_One = iRoom_T % 10;  //Get number at one digits
00027          
00028         display10(iRoom_T_Ten);  //Display ten digits
00029         display1(iRoom_T_One);   //Display one digits  
00030         
00031         //Turn on / off furnace according to temperature
00032         if(iRoom_T > 27) //Over 27 C
00033            furnace = 0;  //Turn furnace off
00034         if(iRoom_T < 25) //Below 25C
00035            furnace = 1;  //Turn furnace on
00036         
00037         wait(1);  //Wait for 1 second         
00038     } // End of while(1) 
00039 }
00040 
00041 //Display number at TEN digits
00042 int display10( int iRoom_T_Ten)
00043 {
00044     switch(iRoom_T_Ten)
00045     {
00046         case 0:
00047           //displayA = 0x3f;   //Common Cathode
00048           displayA = 0xC0;   //Common Anode
00049           break; 
00050           
00051         case 1:
00052           // displayA = 0x3f; 
00053           break;      
00054          
00055         case 2: 
00056           //displayA = 0x5B;  //Common Cathode
00057           displayA = 0xA4;  //Common Anode
00058           break;  
00059           
00060           
00061          default:
00062           // displayA = 0x00; 
00063           break;            
00064     }
00065         
00066     return 1;
00067 }
00068     
00069 //Display number at ONE digits
00070 int display1( int iRoom_T_One)
00071 {
00072     switch(iRoom_T_One)
00073     {
00074         case 0:
00075           //displayB = 0x3f;   //Common Cathode
00076           displayB = 0xC0;   //Common Anode
00077           break; 
00078           
00079         case 1:
00080           //displayB = 0x06;  //Common Cathode
00081           displayB = 0xf9;  //Common anode
00082           break;      
00083           
00084           
00085           
00086          default:
00087           // displayB = 0x00; 
00088           break;            
00089     }
00090     
00091     return 1;
00092 }