Kamil Ondrousek
Chua chaotic oscillator - 640x480 vga
Dependencies: fastlib mbed vga640x480g
main.cpp@0:f2258be4dcd9, 2012-02-26 (annotated)
- Committer:
- JLS
- Date:
- Sun Feb 26 12:40:51 2012 +0000
- Revision:
- 0:f2258be4dcd9
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| JLS | 0:f2258be4dcd9 | 1 | #include "mbed.h" |
| JLS | 0:f2258be4dcd9 | 2 | #include "vga640x480g.h" |
| JLS | 0:f2258be4dcd9 | 3 | |
| JLS | 0:f2258be4dcd9 | 4 | int main() { |
| JLS | 0:f2258be4dcd9 | 5 | |
| JLS | 0:f2258be4dcd9 | 6 | init_vga(); |
| JLS | 0:f2258be4dcd9 | 7 | |
| JLS | 0:f2258be4dcd9 | 8 | vga_cls(); |
| JLS | 0:f2258be4dcd9 | 9 | |
| JLS | 0:f2258be4dcd9 | 10 | vga_box(0,0,639,479,WHITE); |
| JLS | 0:f2258be4dcd9 | 11 | |
| JLS | 0:f2258be4dcd9 | 12 | vga_putstring(10,10,"Chua chaotic oscillator",WHITE); |
| JLS | 0:f2258be4dcd9 | 13 | |
| JLS | 0:f2258be4dcd9 | 14 | float x = 0.5; |
| JLS | 0:f2258be4dcd9 | 15 | float y = 0.25; |
| JLS | 0:f2258be4dcd9 | 16 | float z = 0.125; |
| JLS | 0:f2258be4dcd9 | 17 | float oldx = 0; |
| JLS | 0:f2258be4dcd9 | 18 | float oldy = 0; |
| JLS | 0:f2258be4dcd9 | 19 | float oldz = 0; |
| JLS | 0:f2258be4dcd9 | 20 | |
| JLS | 0:f2258be4dcd9 | 21 | float dt = 0.005; |
| JLS | 0:f2258be4dcd9 | 22 | |
| JLS | 0:f2258be4dcd9 | 23 | float alpha = 15.6; |
| JLS | 0:f2258be4dcd9 | 24 | float beta = 28.58; |
| JLS | 0:f2258be4dcd9 | 25 | float a = -1.14286; |
| JLS | 0:f2258be4dcd9 | 26 | float b = -0.714286; |
| JLS | 0:f2258be4dcd9 | 27 | float h = 0; |
| JLS | 0:f2258be4dcd9 | 28 | |
| JLS | 0:f2258be4dcd9 | 29 | int xout = 0; |
| JLS | 0:f2258be4dcd9 | 30 | int yout = 0; |
| JLS | 0:f2258be4dcd9 | 31 | |
| JLS | 0:f2258be4dcd9 | 32 | while (1) { |
| JLS | 0:f2258be4dcd9 | 33 | |
| JLS | 0:f2258be4dcd9 | 34 | oldx = x; |
| JLS | 0:f2258be4dcd9 | 35 | oldy = y; |
| JLS | 0:f2258be4dcd9 | 36 | oldz = z; |
| JLS | 0:f2258be4dcd9 | 37 | |
| JLS | 0:f2258be4dcd9 | 38 | h = (b * x) + (0.5 * (a - b) * (abs(x+1) - abs(x-1))); |
| JLS | 0:f2258be4dcd9 | 39 | |
| JLS | 0:f2258be4dcd9 | 40 | x = oldx + dt * (alpha * (oldy - oldx - h)); |
| JLS | 0:f2258be4dcd9 | 41 | y = oldy + dt * (oldx - oldy + oldz); |
| JLS | 0:f2258be4dcd9 | 42 | z = oldz + dt * (-beta * oldy); |
| JLS | 0:f2258be4dcd9 | 43 | |
| JLS | 0:f2258be4dcd9 | 44 | xout = 320+(136*x); |
| JLS | 0:f2258be4dcd9 | 45 | yout = 240+(556*y); |
| JLS | 0:f2258be4dcd9 | 46 | |
| JLS | 0:f2258be4dcd9 | 47 | vga_plot(xout,yout,WHITE); |
| JLS | 0:f2258be4dcd9 | 48 | |
| JLS | 0:f2258be4dcd9 | 49 | } |
| JLS | 0:f2258be4dcd9 | 50 | |
| JLS | 0:f2258be4dcd9 | 51 | } |
| JLS | 0:f2258be4dcd9 | 52 |