Revision 5:47721be170f9, committed 2017-09-19

Comitter:

sarahmarshy

Date:

Tue Sep 19 16:59:28 2017 +0000

Parent:

4:0c234f96926c

Commit message:

Update example program to move a ball around the screen

Changed in this revision

diff -r 0c234f96926c -r 47721be170f9 C12832.lib
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/C12832.lib	Tue Sep 19 16:59:28 2017 +0000
@@ -0,0 +1,1 @@
+https://mbed.org/users/chris/code/C12832/#7de323fa46fe

diff -r 0c234f96926c -r 47721be170f9 main.cpp
--- a/main.cpp	Mon Sep 18 20:21:59 2017 +0000
+++ b/main.cpp	Tue Sep 19 16:59:28 2017 +0000
@@ -1,24 +1,59 @@
 #include "mbed.h"
+#include "C12832.h"
+
+// Max X value of LCD screen
+#define MAX_X 124
+// Max Y value of LCD screen
+#define MAX_Y 28
 
-DigitalOut red_led(D5);
-DigitalOut blue_led(D8);
-DigitalOut green_led(D9);
+struct ball_t {
+    int y;
+    int x;
+};
+ball_t ball; // Keep track of ball's x and y
+C12832 lcd(D11, D13, D12, D7, D10);
 
+// Joystick Pins
 DigitalIn up(A2);
 DigitalIn down(A3);
 DigitalIn left(A4);
-AnalogIn right(A5);
+DigitalIn right(A5);
 DigitalIn fire(D4);
 
+void draw_ball() {
+    // Clear LCD
+    lcd.cls();
+    // Calculate ball's position based on joystick movement
+    if(left){
+        ball.x = ball.x > 0 ? ball.x-1 : MAX_X;
+    }
+    if(right) {
+        ball.x = ball.x < MAX_X ? ball.x+1 : 0;
+    }
+    if(up) {
+        ball.y = ball.y > 0 ? ball.y-1 : MAX_Y;
+    }
+    if(down) {
+        ball.y = ball.y < MAX_Y ? ball.y+1 : 0;
+    }
+    if(fire){
+        // Increment ball's x position by 10
+        ball.x = ball.x < MAX_X-10 ? ball.x+10 : 10-(MAX_X-ball.x);
+    }
+    
+    lcd.fillcircle(ball.x, ball.y, 3, 1);
+}
 
 int main()
 {
-
-    while (1) {
-        red_led =  !up && ! fire;
-        blue_led = !down;
-        green_led= !left && !right;
-    }
+    // Put the ball in the middle of the screen initially
+    ball.x = MAX_X/2;
+    ball.y = MAX_Y/2;
+    
+    EventQueue queue;
+    // Update the ball's position every 50 ms
+    queue.call_every(50, draw_ball);
+    queue.dispatch();
 }