crashtest-r0ket/firmware/applications/mandelbrot2.c

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2011-06-19 16:58:31 +00:00
#include <sysinit.h>
#include "basic/basic.h"
#include "lcd/render.h"
#include "lcd/display.h"
#include "lcd/allfonts.h"
#define FIXSIZE 25
#define mul(a,b) ((((long long)a)*(b))>>FIXSIZE)
#define fixpt(a) ((long)(((a)*(1<<FIXSIZE))))
#define integer(a) (((a)+(1<<(FIXSIZE-1)))>>FIXSIZE)
#define ZOOM_RATIO 0.90
#define ITERATION_MAX 150
void blink(){
gpioSetValue (RB_LED1, CFG_LED_OFF);
delayms(100);
gpioSetValue (RB_LED1, CFG_LED_ON);
delayms(100);
gpioSetValue (RB_LED1, CFG_LED_OFF);
}
struct mb {
long rmin, rmax, imin, imax;
bool dirty;
} mandel;
void mandelInit() {
//mandel.rmin = -2.2*0.9;
//mandel.rmax = 1.0*0.9;
//mandel.imin = -2.0*0.9;
//mandel.imax = 2.0*0.9;
mandel.rmin = fixpt(-2);
mandel.rmax = fixpt(1);
mandel.imin = fixpt(-2);
mandel.imax = fixpt(2);
mandel.dirty = true;
}
void mandelMove() {
long delta_r = (mandel.rmax - mandel.rmin)/10;
long delta_i = (mandel.imax - mandel.imin)/10;
char key = getInputRaw();
if(key == BTN_LEFT) {
mandel.imax -= delta_i;
mandel.imin -= delta_i;
mandel.dirty = true;
} else if (key == BTN_RIGHT) {
mandel.imax += delta_i;
mandel.imin += delta_i;
mandel.dirty = true;
} else if (key == BTN_DOWN) {
mandel.rmax += delta_r;
mandel.rmin += delta_r;
mandel.dirty = true;
} else if (key == BTN_UP) {
mandel.rmax -= delta_r;
mandel.rmin -= delta_r;
mandel.dirty = true;
} else if (key == BTN_ENTER) {
mandel.imin = mandel.imin + (mandel.imax-mandel.imin)/10;
mandel.imax = mandel.imax - (mandel.imax-mandel.imin)/10;
mandel.rmin = mandel.rmin +(mandel.rmax-mandel.rmin)/10;
mandel.rmax = mandel.rmax -(mandel.rmax-mandel.rmin)/10;
mandel.dirty = true;
}
}
void mandelCalc() {
long r0,i0,rn, p,q;
long rs,is;
int iteration;
char x, y;
rs=(mandel.rmax-mandel.rmin)/RESY;
is=(mandel.imax-mandel.imin)/RESX;
for (x=0; x<RESX; x++){
for (y=0; y<RESY; y++) {
p=mandel.rmin+y*rs;
q=mandel.imin+x*is;
rn=0;
r0=0;
i0=0;
iteration=0;
while ((mul(rn,rn)+mul(i0,i0))<fixpt(4) && ++iteration<ITERATION_MAX) {
rn=mul((r0+i0),(r0-i0)) +p;
i0=mul(fixpt(2),mul(r0,i0)) +q;
r0=rn;
}
if (iteration==ITERATION_MAX) iteration=1;
bool pixel = ( iteration>1);
lcdSetPixel(x, y, pixel);
}
}
mandel.dirty = false;
}
void main_mandelbrot2(void) {
2011-06-19 16:58:31 +00:00
backlightInit();
IOCON_PIO3_3 = 0x10;
font=&Font_7x8;
mandelInit();
while (1) {
lcdDisplay(0);
mandelMove();
if (mandel.dirty) {
mandelCalc();
}
if(gpioGetValue(RB_BTN0)==0 && gpioGetValue(RB_BTN4)==0){
DoString(0,0,"Enter ISP!");
lcdDisplay(0);
ISPandReset(5);
}
}
return;
}
void tick_mandelbrot2(void){
static int foo=0;
static int toggle=0;
if(foo++>50){
toggle=1-toggle;
foo=0;
gpioSetValue (RB_LED0, toggle);
};
return;
};