Diff: main.cpp

Revision:

0:41f066ce55cf

Child:

1:992086cb4c27

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sat Oct 20 20:24:53 2018 +0000
@@ -0,0 +1,150 @@
+/*
+This project includes both the safe, unsafe sequences, pedestrian crossing, and a buzzer.
+The Assignment task is to create both the safe and unsafe traffic light sequence.
+*/
+
+#include <mbed.h> // importing the mbed library to allow to use input and output fuctions 
+
+DigitalOut Onboard(LED1);//declaring the onboard led as Onboard
+DigitalOut RLED(D2);//RLED refers to the first traffic light Red
+DigitalOut ALED(D3);//ALED refers to the first traffic light Amber
+DigitalOut GLED(D4);//GLED refers to the first traffic light Green
+DigitalOut RRLED(D5);//RRLED refers to the second traffic light Red
+DigitalOut AALED(D6);//AALED refers to the second traffic light Amber
+DigitalOut GGLED(D7);//GGLED refers to the second traffic light Green
+InterruptIn button (USER_BUTTON); //I will be using the onboard button as a pedestrian button
+InterruptIn Switch(D15);//I will be using an external wire to act as a button.
+DigitalOut Buzzer(D10);//Buzzer/Beeper
+
+bool pedest = false, unsafe = false;
+int counter = 0;  
+
+void pedestrians()
+//Declaring a procedure for changing a variable
+{
+    pedest = true;
+    Onboard = 1;
+}
+void reset()
+{//start reset procedure.
+  //Declaring a procedure named reset, 0 arguments are passed.
+  RLED = 0;    
+  ALED = 0;
+  GLED = 0; 
+  RRLED = 0;
+  AALED = 0;
+  GGLED = 0;
+  //All Lights are switched off. (Procedure Ends return to main)
+}//End reset procedure.
+
+
+void sequence(int unsafe)
+// Declaring a procedure for sequence. 2 Arguments are recieved - unsafe and pedestrians
+{//Start sequence procedure. 
+    if(unsafe == true)
+    {
+    //  Sequence          TRAFFIC 1, TRAFFIC 2
+        RLED = 1;  //     RED ON     RED OFF                
+        GGLED = 1; //     AMBER OFF  AMBER OFF 
+        wait(5);   //     GREEN OFF  GREEN ON
+    //----------------------------------------------
+        GGLED = 0; //     RED ON     RED OFF  
+        ALED = 1;  //     AMBER OFF  AMBER ON
+        AALED = 1; //     GREEN OFF  GREEN OFF
+        wait(2);   
+    //----------------------------------------------
+        RLED = 0;  //     RED OFF    RED OFF
+        RRLED = 1; //     AMBER OFF  AMBER OFF
+        ALED = 0;  //     GREEN ON   GREEN OFF
+        AALED = 0;
+        GLED = 1;
+        wait(5);   
+    //----------------------------------------------
+        GLED = 0;  //     RED OFF     RED OFF
+        ALED = 1;  //     AMBER ON    AMBER ON
+        AALED = 1; //     GREEN OFF   GREEN OFF
+        wait(2);   
+    //----------------------------------------------
+        RRLED = 0; //     RED OFF     RED OFF
+        ALED = 0;  //     AMBER OFF   AMBER OFF
+        AALED = 0;  //     GREEN OFF   GREEN OFF     ----------> The same as reset I may replace this with a call to reset
+    }
+    else if(unsafe == false)
+    {
+    //  Sequence          TRAFFIC 1, TRAFFIC 2
+        RLED = 1;  //     RED ON     RED OFF                
+        GGLED = 1; //     AMBER OFF  AMBER OFF 
+        wait(5);   //     GREEN OFF  GREEN ON
+    //----------------------------------------------
+        GGLED = 0; //     RED ON     RED OFF  
+                   //     AMBER OFF  AMBER ON
+        AALED = 1; //     GREEN OFF  GREEN OFF
+        wait(2);   
+    //----------------------------------------------
+        RLED = 1;  //     RED ON    RED ON
+        RRLED = 1; //     AMBER OFF  AMBER OFF
+        ALED = 0;  //     GREEN OFF   GREEN OFF
+        AALED = 0;
+        wait(2);
+        if (pedest == true)
+        {
+                do // A do while loop, do the following until the condition counter has been met
+                {
+                    GGLED = 1;
+                    Buzzer = 1;
+                    GLED = 1;
+                    wait(0.2);
+                    GGLED = 0;
+                    GLED = 0;
+                    Buzzer = 0;
+                    wait(0.2);
+                    counter ++;
+                    pedest = false;
+                    Onboard = 0;
+                } 
+                while(counter <= 20);// condition of counter is while the counter is less than or equal to 10
+        }        
+    //----------------------------------------------
+        GLED = 0;  //     RED OFF     RED OFF
+                 //     AMBER ON    AMBER ON
+        ALED = 1; //     GREEN OFF   GREEN OFF
+        wait(2);   
+    //----------------------------------------------
+        RRLED = 1; //     RED OFF     RED ON 
+        RLED = 0;
+        ALED = 0; //     AMBER OFF   AMBER OFF
+        GLED = 1; //     GREEN ON    GREEN OFF
+        wait(5);
+    //----------------------------------------------
+        GLED = 0;
+        ALED = 1;
+        wait(2);
+        ALED = 0;
+        RLED = 1;
+        wait(2);
+        AALED = 1;
+        wait(2);
+        reset();
+    }
+}//End sequence procedure.
+
+int main()
+{//start main function.
+    //Main procedure, I will create a loop and initalise my variables
+    bool unsafe = false; 
+    /*To create my sequence Ivneed my lights to start on the same lights everytime.
+    Therefore I will create a reset which will set all of the lights off.
+    I will do this by creating a separate procedure for my main procedure to point to.*/
+    
+    reset();//Main points to reset procedure
+    button.fall(&pedestrians); // This fall procedure in is the button interrupt class 
+    while(1)
+    {//Start of while
+    
+        /*infinite loop, the program will never be able to exit this loop because the condition is always TRUE. 
+        Now that I have set up my infinite loop I can now start the sequence procedure.*/
+        sequence(unsafe);// I am calling the sequence procedure with the arguments unsafe and pedestrians.
+        
+    }//End of while 
+    return(0); // The complier warns me that this statement is unreachable, I know. Due the infinite loop above.  
+}//End main function
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