Diff: main.cpp

Revision:

0:b8a0da291a83

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Nov 19 15:10:27 2019 +0000
@@ -0,0 +1,131 @@
+#include "mbed.h"
+DigitalOut ga(p23); //defines the green light for first seqeunce 
+DigitalOut ya(p22); //defines the yellow light for first sequence 
+DigitalOut ra(p21); //defines the red light for first sequence
+DigitalOut gb(p27); //defines green light for second sequence
+DigitalOut yb(p25); //defines yellow light for second sequence
+DigitalOut rb(p24); //defines red light for second sequence
+DigitalIn buttona(p18); //defines the switch as a digital input
+DigitalIn buttonb(p17);
+DigitalOut led(LED1);
+
+bool crossa;
+bool crossb;
+
+void flaga() {
+    if(buttona.read()) {
+        crossa = 0;
+    }
+}
+void flagb() {
+    if(buttonb.read()) {
+        crossb = 0;
+    }
+}
+void crossingfull() {
+    ra = 1;//simultainiously turns on red lights to allow crossing 
+    rb = 1;
+    led = 1;
+    crossa = 1;//sets value of crossing request to false to prevent looping
+    crossb = 1; 
+    wait (1);//remove later for testing
+    led = 0;
+    }   
+void crossinga() {
+    ra = 1;//turns on red lights to allow crossing 
+    led = 1;
+    crossa = 1;//sets value of crossing request to false to prevent looping 
+    wait (1);//remove later for testing
+    led = 0;
+    }
+void crossingb() {
+    rb = 1;
+    led = 1;
+    crossb = 1;//sets value of crossing request to false to prevent looping 
+    wait (1);//remove later for testing
+    led = 0;
+    }      
+//no wait should be required here as the normal lights function begins with a red light, this also minimises disruption
+
+void lightsa() { //creates the function for the first lights sequence 
+         for (int i=0; i<25; i++) {
+         ra = 1;
+         flaga ();
+         wait (0.1);
+         }
+         for (int i=0; i<5; i++) {
+         ya = 1;
+         flaga();
+         wait (0.1);
+         }
+         for (int i=0; i<25; i++) {
+         ra = 0; //turns off red light
+         ya = 0; //turns off yellow light at same time
+         ga = 1; //turns on green light at the same time
+         flaga();
+         wait (0.1);
+         }
+         for (int i=0; i<5; i++) {
+         ga = 0; // turns off green 
+         ya = 1; // turns on yellow light at same time
+         flaga(); //chechs for switch press
+         wait (0.1);//waits 0.5seconds before repeating
+         }
+         for (int i=0; i<1; i++) { 
+         ya = 0; //turns off yellow light
+         ra = 1; //turns on red light
+         flaga();
+         wait (0.1);
+         }
+}
+void lightsb() { //creates the function for the second lights sequence 
+         for (int i=0; i<25; i++) {
+         rb = 1;
+         flagb ();
+         wait (0.1);
+         }
+         for (int i=0; i<5; i++) {
+         yb = 1;
+         flagb();
+         wait (0.1);
+         }
+         for (int i=0; i<25; i++) {
+         rb = 0; //turns off red light
+         yb = 0; //turns off yellow light at same time
+         gb = 1; //turns on green light at the same time
+         flagb();
+         wait (0.1);
+         }
+         for (int i=0; i<5; i++) {
+         gb = 0; // turns off green 
+         yb = 1; // turns on yellow light at same time
+         flagb(); //chechs for switch press
+         wait (0.1);//waits 0.5seconds before repeating
+         }
+         for (int i=0; i<1; i++) { 
+         yb = 0; //turns off yellow light
+         rb = 1; //turns on red light
+         flagb();
+         wait (0.1);
+         }
+}  
+int main() {
+    crossa = 1;
+    crossb = 1;
+    while(1) { //repeats indefinitely
+    if (crossa == 1 && crossb == 1) {
+        rb = 1; 
+        lightsa(); //calls the function for the first lights sequence
+        lightsb();
+        }
+    else if (crossa == 0 && crossb == 1) {
+        crossinga ();
+        }
+    else if (crossa == 1 && crossb == 0) {
+        crossingb ();
+        }
+    else if (crossa == 0 && crossb == 0) {
+        crossingfull ();
+        }
+    }
+}
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