Diff: main.cpp

Revision:

0:f2258be4dcd9

diff -r 000000000000 -r f2258be4dcd9 main.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Sun Feb 26 12:40:51 2012 +0000
@@ -0,0 +1,52 @@
+#include "mbed.h"
+#include "vga640x480g.h"
+
+int main() {
+
+    init_vga();
+
+    vga_cls();
+
+    vga_box(0,0,639,479,WHITE);
+    
+    vga_putstring(10,10,"Chua chaotic oscillator",WHITE);
+    
+    float x = 0.5;
+    float y = 0.25;
+    float z = 0.125;
+    float oldx = 0;
+    float oldy = 0;
+    float oldz = 0;
+        
+    float dt = 0.005;
+    
+    float alpha = 15.6;
+    float beta = 28.58;
+    float a = -1.14286;
+    float b = -0.714286;
+    float h = 0;
+    
+    int xout = 0;
+    int yout = 0;
+ 
+ while (1) {
+ 
+    oldx = x;
+    oldy = y;
+    oldz = z;
+
+    h = (b * x) + (0.5 * (a - b) * (abs(x+1) - abs(x-1)));
+                
+    x = oldx + dt * (alpha * (oldy - oldx - h));
+    y = oldy + dt * (oldx - oldy + oldz);
+    z = oldz + dt * (-beta * oldy);
+    
+    xout = 320+(136*x);
+    yout = 240+(556*y); 
+
+    vga_plot(xout,yout,WHITE);
+    
+}
+
+  }    
+   
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