Diff: main.cpp

Revision:

3:aac8dcbe6e18

Parent:

2:bdd8b01141d1

Child:

4:c6d3c2dea4b0

--- a/main.cpp	Wed Dec 20 11:40:20 2017 +0000
+++ b/main.cpp	Fri Jan 24 13:18:25 2020 +0000
@@ -7,32 +7,30 @@
 Demonstrates how to implement a simple FSM counter
 
 (c) Craig A. Evans, University of Leeds, Jan 2016
+Updated January 2020
 
 */ 
 
 #include "mbed.h"
 
 // K64F on-board LEDs 
-DigitalOut r_led(LED_RED);
-DigitalOut g_led(LED_GREEN);
-DigitalOut b_led(LED_BLUE);
-// K64F on-board switches
-InterruptIn sw2(SW2);
-InterruptIn sw3(SW3);
-
-// LEDs on Gamepad (1 to 4) - active-low 0 = on and 1 = off
-BusOut output(PTA1,PTA2,PTC2,PTC3);
+BusOut k64f_leds(LED_RED, LED_GREEN, LED_BLUE);
+// Gamepad switches
+InterruptIn buttonA(PTC7);
+InterruptIn buttonB(PTC9);
+// LEDs on Gamepad (1 to 3) - active-low 0 = on and 1 = off
+// BusOut arguments are LSB first
+BusOut output(PTA2,PTC2,PTC3);
 
 // array of states in the FSM, each element is the output of the counter
 // set the output in binary to make it easier, 0 is LED on, 1 is LED off
-int fsm[4] = {0b0111,0b1011,0b1101,0b1110};
+int fsm[3] = {0b011,0b101,0b110};
 
-// set-up the on-board LEDs and switches
-void init_K64F();
 
 int main()
 {
-    init_K64F();
+    k64f_leds = 0b111;  // turn off K64F LEDs
+    
     // set inital state 
     int state = 0;
     
@@ -49,13 +47,10 @@
                 state = 2;
                 break;
             case 2:
-                state = 3;
-                break;
-            case 3:
                 state = 0;
                 break;
             default:
-                error("Invalid state");  //invalid state - call error routine
+                error("Invalid state");  //invalid state - call Mbed error routine
                 // or could jump to starting state i.e. state = 0
                 break;  
         }
@@ -63,18 +58,4 @@
         wait(0.5);  // small delay
 
     }
-}
-
-void init_K64F() 
-{
-    // on-board LEDs are active-low, so set pin high to turn them off.
-    r_led = 1;
-    g_led = 1;
-    b_led = 1;   
-    
-    // since the on-board switches have external pull-ups, we should disable the internal pull-down
-    // resistors that are enabled by default using InterruptIn
-    sw2.mode(PullNone);
-    sw3.mode(PullNone);
-
 }
\ No newline at end of file