main.cpp

#include "mbed.h"
#include <cstdio>

//note definitions for buzzer
#define NOTE_C4  262    
#define NOTE_D4  294
#define NOTE_E4  330
#define NOTE_F4  349
#define NOTE_G4  392
#define NOTE_A4  440
#define NOTE_B4  494
#define NOTE_C5  523

/*  I   N   P   U   T   S  */
DigitalIn Button1(PC_10);
DigitalIn Button2(PC_11);
DigitalIn Button3(PD_2);
AnalogIn PTMeter1(PA_5);
AnalogIn PTMeter2(PA_6);
AnalogIn PTMeter3(PA_7);
AnalogIn LDR(PC_2);
AnalogIn TS(PC_3);
AnalogIn FSR(PA_1);
BufferedSerial pc(USBTX, USBRX);

/*  O  U  T  P  U  T  S  */
DigitalOut LEDRED(PC_0);
DigitalOut LEDGREEN1(PC_1);
DigitalOut LEDGREEN2(PB_0);
DigitalOut LEDGREEN3(PA_4);
PwmOut MCLED1R(PB_3);
PwmOut MCLED2B(PB_4);
PwmOut MCLED3G(PB_5);
PwmOut Buzzer(PA_15);

/*              A      B      C      D     E     F      G        */
BusOut SegDis(PA_11, PA_12, PB_1, PB_15, PB_14, PB_12, PB_11);

/*               0     1     2     3     4     5     6     7     8     9     A     B     C     D     E     F   */ 
int hexDis[] = {0x3F, 0x06, 0x5B, 0X4F, 0X66, 0X6D, 0X7D, 0X7, 0XFF, 0X67, 0x77, 0xFF, 0X39, 0X3F, 0X79, 0X71};

/*              Buzzer NOTES               */
const int C_major_scale[] = {NOTE_C4, NOTE_D4, NOTE_E4, NOTE_F4, NOTE_G4, NOTE_A4, NOTE_B4, NOTE_C5};

/* FUNCTION DECLARTION */
void init_buttons();
void init_leds();
void SegDis_init();
int  powerCheck();
int  button2check();
void button3check();
void fptMeter1check();
void fptMeter2check();
void fptMeter3check();
void watertemp();
int  tempWarn();
int  forceWarn();
void sensors();
void warning();
void run();
void play_note(int frequency);

/* VARIABLE DECLARATION */
float LDR_val = 0.0;
float TMP_val_F = 0.0;
float FSR_val = 0.0;
float TMP_val_C =0.0;
float TMP_val_C_user =0.0;
int lastButton1Stats;
int currentButton1Stats;
int button1stats;
int cntl_val = 0;
int timer =0;
bool coldwater ;
bool warmwater ;
bool hotwater;
char mode;




/* MAIN PROGRAM */
int main()
{    
    init_buttons();         
    while (true){
        powerCheck();
        if(powerCheck()==1){
            button2check();
            button3check();
            fptMeter1check();
            fptMeter2check();
            fptMeter3check(); 
            watertemp();
            tempWarn();
            warning();
            forceWarn();
            sensors();
            run();    
        }   
    }
}





/*         FUNCTIONS    */

void SegDis_init(){
    SegDis.write(0x00); //turn off the display by setting all segments to '0'
    ThisThread::sleep_for(200ms);
}
void init_buttons(){
    Button1.mode(PullNone);  //turn off internal pull up / pull down resistors
    Button2.mode(PullNone);
    Button3.mode(PullNone);
    
}
void init_leds(){              //turn off leds
    LEDGREEN1.write(0);   
    LEDGREEN2.write(0);
    LEDGREEN3.write(0);
    LEDRED.write(0);
    MCLED1R.write(0);
    MCLED3G.write(0);
    MCLED2B.write(0);      
}
 int powerCheck(){              // FOR TURNING ON/OFF THE BOARD.
    lastButton1Stats = currentButton1Stats;
    currentButton1Stats = Button1;
       if(lastButton1Stats == 1 && currentButton1Stats ==0 ){           
            if (LEDGREEN1.read() ==0){
            LEDGREEN1.write(1);
            button1stats=1; 
            printf("*****POWER ON - SELECT MODE, TEMPERATURE AND TIME*****\n");
            for(int i = 0; i < 5; i++){        //Buzzer
                play_note(C_major_scale[i]);   
            }
            Buzzer.pulsewidth_us(0); 
            }        
            else {
            init_leds();
            SegDis_init();
            button1stats=0;    
            printf("POWER OFF\n"); 
            for(int i = 5; i > 0; i--){         //buzzer
                play_note(C_major_scale[i]);   
            }
            Buzzer.pulsewidth_us(0);  
            }  
        }  
        return button1stats;
}
int button2check(){         // BUTTON 2 CHECK.
    if(Button2.read() == 1){
        play_note(C_major_scale[2]);
        Buzzer.pulsewidth_us(0); 
        LEDRED.write(1);      
        return 1;
    }
    else { 
        LEDRED.write(0);
        return 0;}
}
void button3check(){     // BUTTON 3 CHECK.
       
}
void fptMeter1check(){         // FOR POTENTIOMETER 1.
     cntl_val = PTMeter1.read_u16()/25000;

       if(cntl_val == 0){
           SegDis.write(hexDis[12]);
           mode = 'C'; 
           printf("*****MODE C SELECTED.*****\n");
           }
       if(cntl_val == 1){
           SegDis.write(hexDis[11]);
           mode = 'B';  
           printf("*****MODE B SELECTED.*****\n");
           }
       if(cntl_val == 2){
           SegDis.write(hexDis[10]);
           mode = 'A';
           printf("*****MODE A SELECTED.*****\n");
           }  
          ThisThread::sleep_for(500ms);       
}
void fptMeter2check(){     // FOR POTENTIOMETER 2.
     cntl_val = PTMeter2.read_u16()/25000;
    
       if(cntl_val == 0){        
           SegDis.write(hexDis[6]);
           timer = 3600000;   // 60min = 3600000ms
           printf("*****TIME SET TO 60 MINUTES*****\n");
           }
       if(cntl_val == 1){
           SegDis.write(hexDis[4]);
           timer = 2400000;  // 40min = 2400000ms
           printf("*****TIME SET TO 40 MINUTES*****\n");
           }
       if(cntl_val == 2){
           SegDis.write(hexDis[2]);
           timer = 1200000;   // 20min = 1200000ms  /// 12 seconds is used for the test video. 
           printf("*****TIME SET TO 20 MINUTES*****\n");
           }
         ThisThread::sleep_for(500ms);
            
}
void fptMeter3check(){     // FOR POTENTIOMETER 3.
    cntl_val = PTMeter3.read_u16()/25000;
         
       if(cntl_val == 0){       
           MCLED1R.write(1);
           MCLED3G.write(0);
           MCLED2B.write(0);
           TMP_val_C_user = 3.0;     // 3 = HOT
           printf("*****TEMPERATURE SET TO HOT.*****\n");
           }
       if(cntl_val == 1){
           MCLED1R.write(1);
           MCLED3G.write(0.05);
           MCLED2B.write(0);
           TMP_val_C_user = 2.0;    // 2 = WARM
           printf("*****TEMPERATURE SET TO WARM.*****\n");
           }
       if(cntl_val == 2){
           MCLED1R.write(0);
           MCLED3G.write(0);
           MCLED2B.write(1);
           TMP_val_C_user = 1.0;    // 1 = COLD
           printf("*****TEMPERATURE SET TO COLD.*****\n");
           }
}
void sensors (){     // FOR READING THE SENSORS - LDR, THERMISTOR AND PRESSURE. 
    {
        LDR_val = LDR.read()*100;
        TMP_val_F = TS.read()*1000;
        TMP_val_C = (TMP_val_F -32)*5/9;
        FSR_val = FSR.read()*100;
        //printf("Temperature --  %f | LIGHT --  %f | FORCE -- %f | USER -- %f \n", TMP_val_C,LDR_val,FSR_val, TMP_val_C_user);   // FOR TEST ONLY.  
    }
}
void play_note(int frequency){                // FOR BUZZER
    Buzzer.period_us((float) 1000000.0f/ (float) frequency);   
    Buzzer.pulsewidth_us(Buzzer.read_period_us()/2);            
    ThisThread::sleep_for(100ms);                               
}
void watertemp(){     // FOR DETERMINING WATER TEMPERATURE ACCORDING TO THE MODE. 
    if(TMP_val_C<30.0){
        coldwater =1;
        warmwater =0;
        hotwater =0;      
    }
    if(TMP_val_C>30.0){
        coldwater =0;
        warmwater =1;
        hotwater =0;   
    }
    if(TMP_val_C>50.0){
        coldwater =0;
        warmwater =0;
        hotwater =1; 
    }
}
void warning(){    // WARNING WHEN THE MACHINE IS OVERLOADED. 
    if (LDR_val < 50.0){
        printf("*****WARNING !!!!!!!!!!!!! TOO MUCH CLOTHES. DON'T LOAD THE MACHINE OVER THE MARKED LEVEL.*****\n");
        play_note(C_major_scale[4]);
        Buzzer.pulsewidth_us(0);
        LEDRED.write(1);
    }
    else{     
        LEDRED.write(0);
    }
}
int tempWarn(){ // CHECKING THE USER TEMPERATURE AND WATER TEMPERATURE
    if(coldwater == true && TMP_val_C_user == 1.0 || warmwater == true && TMP_val_C_user == 2.0 || hotwater ==true && TMP_val_C_user ==3.0){
             //printf("*****WATER TEMPERATURE MATCHES WITH USER'S SELECTED TEMPERATURE.*****\n");
            LEDGREEN2.write(1);
             return 1;
         }
          else{
        printf("*****WATER TEMPERATURE DON'T MATCH WITH USER'S SELECTED TEMPERATURE. PLEASE WAIT FOR THE WATER TO COOL DOWN OR WARM UP.*****\n");
        LEDGREEN2.write(0);
        return 0;
    }
}
int forceWarn(){
    if(FSR_val<5){
        printf("*****NOT ENOUGH CLOTHES !!!! PLEASE PUT MORE CLOTHES INSIDE*****\n");
        LEDGREEN3.write(0);
        return 0;
    }else{
       // printf("ENOUGH CLOTHES DETECTED. \n");
       LEDGREEN3.write(1);
        return 1;
    }
}
void run(){   // FOR RUNNING THE PROGRAM. 
     while (button2check() ==1 && mode =='A' ){    // MODE A = 100 cycle
         if(tempWarn() ==1 && forceWarn()==1){
             printf("*****MACHINE RUNNING..........................***** \n *****MODE SELECTED = A, TEMPERATURE MODE SELECTED - %.1f, TIME SELECTED - %dms, MOTOR SET TO 100 CYCLE***** \n", TMP_val_C_user, timer );
             SegDis.write(hexDis[1]);
             LEDRED.write(1);
             thread_sleep_for(timer);
             for(int i = 0; i < 8; i++){        //Buzzer
                play_note(C_major_scale[i]);   
            }
            Buzzer.pulsewidth_us(0); 
            // DUE TO NOT HAVING A MOTOR, THE MOTOR CYCLE IS NOT IMPLEMENTED.
         }
          else{
             printf("*****PLEASE WAIT FOR GREEN LED2 AND GREEN LED3 TO LIGHT UP***** \n");
             LEDRED.write(0);
         }
    }
    while (button2check() ==1 && mode =='B' && forceWarn()==1){    // MODE B = 200 cycle
         if(tempWarn() ==1 && forceWarn()==1){
             printf("*****MACHINE RUNNING..........................***** \n *****MODE SELECTED = B, TEMPERATURE MODE SELECTED - %.1f, TIME SELECTED - %dms, MOTOR SET TO 200 CYCLE***** \n", TMP_val_C_user, timer );
             SegDis.write(hexDis[1]);
             LEDRED.write(1);
             thread_sleep_for(timer);
             for(int i = 0; i < 8; i++){        //Buzzer
                play_note(C_major_scale[i]);   
            }
            Buzzer.pulsewidth_us(0); 
            // DUE TO NOT HAVING A MOTOR, THE MOTOR CYCLE IS NOT IMPLEMENTED.
         }
          else{
              printf("*****PLEASE WAIT FOR GREEN LED2 AND GREEN LED3 TO LIGHT UP*****\n ");
              LEDRED.write(0);
         }
    }
     while (button2check() ==1 && mode =='C' && forceWarn()==1){    // MODE C = 300 cycle
         if(tempWarn() ==1 && forceWarn()==1){
             printf("*****MACHINE RUNNING..........................***** \n *****MODE SELECTED = C, TEMPERATURE MODE SELECTED - %.1f, TIME SELECTED - %dms, MOTOR SET TO 300 CYCLE ***** \n", TMP_val_C_user, timer );
             SegDis.write(hexDis[1]);
             LEDRED.write(1);
             thread_sleep_for(timer);
             for(int i = 0; i < 8; i++){        //Buzzer
                play_note(C_major_scale[i]);   
            }
            Buzzer.pulsewidth_us(0); 
            // DUE TO NOT HAVING A MOTOR, THE MOTOR CYCLE IS NOT IMPLEMENTED.
         }
          else{
              printf("*****PLEASE WAIT FOR GREEN LED2 AND GREEN LED3 TO LIGHT UP*****\n ");
              LEDRED.write(0);
         }
    }           
}