main.cpp

00001 
00002 //Connect as follows:
00003 //RFID pins, motor         
00004 //----------------------------------------
00005 //RFID IRQ=pin5    ->   Not used. Leave open
00006 //RFID MISO=pin4   ->   Nucleo SPI_MISO=PA_6=D12
00007 //RFID MOSI=pin3   ->   Nucleo SPI_MOSI=PA_7=D11
00008 //RFID SCK=pin2    ->   Nucleo SPI_SCK =PA_5=D13
00009 //RFID SDA=pin1    ->   Nucleo SPI_CS  =PB_6=D10
00010 //RFID RST=pin7    ->   Nucleo         =PA_9=D8
00011 //3.3V and Gnd to the respective pins                              
00012 // 1st Motor transistor  to Pin D9
00013 // 2nd Motor transistor  to Pin D14
00014 // Pin D0 to pin 2 of the serial Cable
00015 // pin D1 to pin 3 of the serial cable
00016 // pin A0 to the trigger of ultrasonic sensor 1
00017 // pin A1 to the Echo of ultrasonic sensor 1                              
00018 // pin D2 to RS pin of LCD
00019 // pin D3 to E pin of LCD
00020 // pin D4 to D4 pin of LCD
00021 // pin D5 to D5 pin of LCD
00022 // pin D6 to D6 pin of LCD
00023 // pin D7 to D7 pin of LCD
00024 
00025 //---------------------------------------------
00026 #include "mbed.h"
00027 #include "MFRC522.h"
00028 #include "SPI.h"
00029 #include "hcsr04.h"
00030 #include "TextLCD.h"
00031 #define ECHO_SERVER_PORT   7
00032 #define SPI_MOSI D11
00033 #define SPI_MISO D12
00034 #define SPI_SCK D13
00035 #define SPI_CS D10
00036 #define MF_RESET D8
00037 TextLCD lcd(D2, D3, D4, D5, D6, D7,TextLCD::LCD20x4); // rs, e, d4-d7
00038 DigitalOut myled(D9);
00039 DigitalOut myled1(D14);
00040 //DigitalOut myled2(D15);    Can be enabled for 3rd motor slot.
00041 
00042 HCSR04 sensor(A0,A1); // Trigger , Echo
00043 HCSR04 sensor1(A2,A3); //Trigger , Echo
00044 //HCSR04 sensor2(A4,A5); //Trigger , Echo   Can enable if needed for 3rd slot.
00045 
00046 void distance();
00047 void display();
00048 
00049 //Serial connection to PC for output
00050 Serial pc(USBTX, USBRX);
00051 // Serial connection with WIZ750SR gateway for MQTT communication  
00052 Serial serial(D1,D0);  //TX and RX
00053 // Initializing RFID chip pins
00054 MFRC522    RfChip   (SPI_MOSI, SPI_MISO, SPI_SCK, SPI_CS, MF_RESET);
00055     char c;
00056     int d;
00057 int main(void) {
00058     pc.printf("starting...\n");
00059     myled=0;
00060     pc.printf("Wait a second...\r\n");
00061    
00062   //Init. RC522 Chip
00063   RfChip.PCD_Init();
00064  
00065   while (true) {
00066     pc.printf("enterd RFID reading loop...\n");
00067     // Look for new cards
00068     if ( ! RfChip.PICC_IsNewCardPresent())
00069     {
00070       wait_ms(500);
00071       continue;
00072     }
00073    // Select one of the cards
00074     if ( ! RfChip.PICC_ReadCardSerial())
00075     {
00076       wait_ms(500);
00077       continue;
00078     }
00079    
00080    char data[20]="";
00081    char data1[20]="";
00082     
00083     // Print Card UID
00084     pc.printf("Card UID: ");
00085     printf("Size of UID: %d \n",RfChip.uid.size);
00086     for (uint8_t i = 0; i < RfChip.uid.size; i++)
00087     {
00088       char temp[5];
00089       pc.printf(" %X02", RfChip.uid.uidByte[i]);
00090       sprintf(temp,"%X02", RfChip.uid.uidByte[i]);
00091       strcat(data,temp);
00092     }
00093     
00094     // Print Card type
00095     uint8_t piccType = RfChip.PICC_GetType(RfChip.uid.sak);
00096     pc.printf(" \nPICC Type: %s \n\r", RfChip.PICC_GetTypeName(piccType));
00097     wait_ms(1000);
00098     
00099     if(strcmp(data,"BA0211026102D302")==0)      //Comparing the stored data with the new data read by the RFID reader. 
00100     {   
00101         strcat(data1,"natsu");
00102         wait(1);
00103         serial.printf("%s",data1);
00104         wait(2);
00105         distance();
00106     }
00107     if(strcmp(data,"E8028002AC02E902")==0)
00108     {
00109         strcat(data1,"luffy");
00110         wait(1);
00111         serial.printf("%s",data1);
00112         wait(2);
00113         distance ();
00114     }
00115     pc.printf("The user name is :%s \n",data1);
00116    }
00117 }
00118 
00119 
00120 void distance()
00121 {
00122      
00123     pc.printf("Entered into distance loop \n");
00124     while(1){
00125         long distance = sensor.distance();
00126         wait(0.5); 
00127         long distance1 = sensor1.distance();
00128         wait(0.5);
00129     //  long distance2 = sensor2.distance();             //can be enabled if connected to 3rd Ultrasonic sensor
00130         pc.printf("distance  %d  \n",distance);
00131         pc.printf("distance  %d  \n",distance1);
00132     //  pc.printf("distance  %d  \n",distance2);         //can be enabled if connected to 3rd Ultrasonic sensor to enable it in the PC.
00133         wait(1);
00134         
00135         wait(1.0); // 1 sec  
00136         if(distance<=10){
00137             myled= 1;
00138             wait(3);
00139             myled=0;
00140             serial.printf("/drink");
00141             c = '\0';
00142             c = 'd';
00143             d=15;
00144             display();
00145             pc.printf("/ item drink /cost 15");
00146             break;
00147             }
00148         else if(distance1<=10){
00149             myled1= 1;
00150             wait(3);
00151             myled1=0;
00152             serial.printf("/snack");
00153             c = '\0';
00154             c = 's';
00155             d=10;
00156             display();
00157             pc.printf("/item snack /cost 10");
00158             break;
00159           }
00160  /* else if(distance2<=10){
00161             myled1= 1;
00162             wait(30);
00163             myled1=0;
00164             serial.printf("/choco");
00165             c = '\0';
00166             c = 's';
00167             d=10;
00168             display();
00169             pc.printf("/snack/10");
00170             break;
00171           } */                                    //Can be enabled when 3rd ultrasonic is connected.
00172          
00173           }   
00174        }
00175        
00176                                  //function for LCD display ....
00177        
00178 void display(){                                  
00179     lcd.locate(3,0);
00180     lcd.printf("Vending Machine\n");
00181     lcd.locate(0,2);
00182     if(c=='d'){
00183     lcd.printf("ITEM NAME: drink");
00184     }
00185     else if(c=='s')
00186     {
00187      lcd.printf("ITEM NAME: Snack");
00188     }
00189     lcd.locate(0,3);
00190     lcd.printf("ITEM COST: %d",d);
00191     }