added mandelbrot demo
This commit is contained in:
Joel Bodenmann
parent
216c5471ca
commit
1909342055
4 changed files with 124 additions and 95 deletions
|
|
@ -1,39 +0,0 @@
|
||||||
/*
|
|
||||||
ChibiOS/GFX - Copyright (C) 2012
|
|
||||||
Joel Bodenmann aka Tectu <joel@unormal.org>
|
|
||||||
|
|
||||||
This file is part of ChibiOS/GFX.
|
|
||||||
|
|
||||||
ChibiOS/GFX is free software; you can redistribute it and/or modify
|
|
||||||
it under the terms of the GNU General Public License as published by
|
|
||||||
the Free Software Foundation; either version 3 of the License, or
|
|
||||||
(at your option) any later version.
|
|
||||||
|
|
||||||
ChibiOS/GFX is distributed in the hope that it will be useful,
|
|
||||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
||||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
||||||
GNU General Public License for more details.
|
|
||||||
|
|
||||||
You should have received a copy of the GNU General Public License
|
|
||||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include "ch.h"
|
|
||||||
#include "hal.h"
|
|
||||||
#include "gdisp.h"
|
|
||||||
|
|
||||||
int main(void) {
|
|
||||||
halInit();
|
|
||||||
chSysInit();
|
|
||||||
|
|
||||||
gdispInit();
|
|
||||||
gdispClear(Black);
|
|
||||||
|
|
||||||
// gdispDrawXXX(...);
|
|
||||||
|
|
||||||
while (TRUE) {
|
|
||||||
|
|
||||||
chThdSleepMilliseconds(100);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
18
demos/mandelbrot/main.c
Normal file
18
demos/mandelbrot/main.c
Normal file
|
|
@ -0,0 +1,18 @@
|
||||||
|
#include "ch.h"
|
||||||
|
#include "hal.h"
|
||||||
|
#include "gdisp.h"
|
||||||
|
|
||||||
|
int main(void) {
|
||||||
|
halInit();
|
||||||
|
chSysInit();
|
||||||
|
|
||||||
|
gdispInit();
|
||||||
|
gdispSetOrientation(GDISP_ROTATE_270);
|
||||||
|
|
||||||
|
mandelbrotInit(50, 50, 512);
|
||||||
|
|
||||||
|
while(TRUE) {
|
||||||
|
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
106
demos/mandelbrot/mandelbrot.c
Normal file
106
demos/mandelbrot/mandelbrot.c
Normal file
|
|
@ -0,0 +1,106 @@
|
||||||
|
#include "ch.h"
|
||||||
|
#include "hal.h"
|
||||||
|
#include "gdisp.h"
|
||||||
|
|
||||||
|
int count = 0;
|
||||||
|
float mag = 1;
|
||||||
|
float offsetx = -0.756423894274328;
|
||||||
|
float offsety = 0.064179410646170;
|
||||||
|
static float width, height;
|
||||||
|
static uint16_t iterations, screen_off_x, screen_off_y;
|
||||||
|
static uint16_t *FrameBuffer;
|
||||||
|
|
||||||
|
static int generateColor(int count, int base) {
|
||||||
|
int r,g,b;
|
||||||
|
int d = (count % base) * 256 / base;
|
||||||
|
int m = (int)(d / 42.667);
|
||||||
|
|
||||||
|
switch(m) {
|
||||||
|
case 0: r=0; g=6*d; b=255; break;
|
||||||
|
case 1: r=0; g=255; b=255-6*(d-43); break;
|
||||||
|
case 2: r=6*(d-86); g=255; b=0; break;
|
||||||
|
case 3: r=255; g=255-6*(d-129); b=0; break;
|
||||||
|
case 4: r=255; g=0; b=6*(d-171); break;
|
||||||
|
case 5: r=255-6*(d-214); g=0; b=255; break;
|
||||||
|
default: r=0; g=0; b=0; break;
|
||||||
|
}
|
||||||
|
|
||||||
|
return (((r >> 3) & 0x1f) << 11) | (((g >> 2) & 0x3f) << 5) | ((b >> 3) & 0x1f);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void complex_mult(float ar,float ai,float br,float bi, float *cr,float *ci) {
|
||||||
|
// C = A * B
|
||||||
|
*cr = ar * br - ai * bi;
|
||||||
|
*ci = ar * bi + ai * br;
|
||||||
|
}
|
||||||
|
|
||||||
|
static float complex_abs2(float r,float i) {
|
||||||
|
float ar,ai;
|
||||||
|
complex_mult(r,i,r,-i,&ar,&ai);
|
||||||
|
|
||||||
|
return ar;
|
||||||
|
}
|
||||||
|
|
||||||
|
void mandelbrotInit(uint16_t mandel_width, uint16_t mandel_height, uint16_t mandel_iterations) {
|
||||||
|
const char *msg = "ChibiOS/GFX";
|
||||||
|
|
||||||
|
width = (float)mandel_width;
|
||||||
|
height = (float)mandel_height;
|
||||||
|
iterations = mandel_iterations;
|
||||||
|
|
||||||
|
FrameBuffer = chHeapAlloc(NULL, width * height * sizeof(uint16_t));
|
||||||
|
if(FrameBuffer == NULL)
|
||||||
|
return;
|
||||||
|
|
||||||
|
screen_off_x = (gdispGetWidth() - width) / 2;
|
||||||
|
screen_off_y = (gdispGetHeight() - height) / 2;
|
||||||
|
|
||||||
|
gdispClear(Black);
|
||||||
|
gdispDrawString((gdispGetWidth() - gdispGetStringWidth(msg, &fontUI2Double)) / 2, 5, "ChibiOS/GFX", &fontUI2Double, White);
|
||||||
|
|
||||||
|
while(TRUE) {
|
||||||
|
mandelbrotLoop();
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void mandelbrotLoop() {
|
||||||
|
int x, y;
|
||||||
|
int pos = 0;
|
||||||
|
|
||||||
|
for(y = 0; y < height; y++) {
|
||||||
|
for(x = 0; x < width; x++) {
|
||||||
|
float cr = (x - width/2.) / (width/2.) / mag + offsetx;
|
||||||
|
float ci = (y - width/2.) / (width/2.) / mag + offsety;
|
||||||
|
float zr = 0;
|
||||||
|
float zi = 0;
|
||||||
|
int t;
|
||||||
|
|
||||||
|
for(t = 0; t < iterations; t++) {
|
||||||
|
if(complex_abs2(zr,zi) > 4)
|
||||||
|
break;
|
||||||
|
complex_mult(zr,zi,zr,zi,&zr,&zi);
|
||||||
|
zr += cr;
|
||||||
|
zi += ci;
|
||||||
|
}
|
||||||
|
|
||||||
|
FrameBuffer[pos++] = generateColor(t, 64);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
gdispBlitArea(screen_off_x, screen_off_y, width, height, FrameBuffer);
|
||||||
|
|
||||||
|
// magnification
|
||||||
|
mag = mag * 1.2;
|
||||||
|
|
||||||
|
// panning
|
||||||
|
//offsety += 0.001;
|
||||||
|
//offsetx += 0.0016;
|
||||||
|
|
||||||
|
if(count++ > 500) {
|
||||||
|
offsetx = -0.756423894274328;
|
||||||
|
offsety = 0.064179410646170;
|
||||||
|
mag = 1;
|
||||||
|
count = 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
|
@ -1,56 +0,0 @@
|
||||||
/*
|
|
||||||
ChibiOS/GFX - Copyright (C) 2012
|
|
||||||
Joel Bodenmann aka Tectu <joel@unormal.org>
|
|
||||||
|
|
||||||
This file is part of ChibiOS/GFX.
|
|
||||||
|
|
||||||
ChibiOS/GFX is free software; you can redistribute it and/or modify
|
|
||||||
it under the terms of the GNU General Public License as published by
|
|
||||||
the Free Software Foundation; either version 3 of the License, or
|
|
||||||
(at your option) any later version.
|
|
||||||
|
|
||||||
ChibiOS/GFX is distributed in the hope that it will be useful,
|
|
||||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
||||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
||||||
GNU General Public License for more details.
|
|
||||||
|
|
||||||
You should have received a copy of the GNU General Public License
|
|
||||||
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
||||||
*/
|
|
||||||
|
|
||||||
#include "ch.h"
|
|
||||||
#include "hal.h"
|
|
||||||
#include "gdisp.h"
|
|
||||||
#include "touchpad.h"
|
|
||||||
|
|
||||||
static const SPIConfig spicfg = {
|
|
||||||
NULL, // no callback
|
|
||||||
GPIOC, // CS PORT
|
|
||||||
6, // CS PIN
|
|
||||||
SPI_CR1_BR_1 | SPI_CR1_BR_0,
|
|
||||||
};
|
|
||||||
|
|
||||||
TOUCHPADDriver TOUCHPADD1 = {
|
|
||||||
&SPID1, // SPI driver
|
|
||||||
&spicfg, // SPI config
|
|
||||||
GPIO, // IRQ PORT
|
|
||||||
4, // IRQ PIN
|
|
||||||
TRUE // start SPI
|
|
||||||
};
|
|
||||||
|
|
||||||
int main(void) {
|
|
||||||
halInit();
|
|
||||||
chSysInit();
|
|
||||||
|
|
||||||
gdispInit();
|
|
||||||
|
|
||||||
tpInit(&TOUCHPADD1);
|
|
||||||
tpCalibrate();
|
|
||||||
|
|
||||||
gdispClear(Black);
|
|
||||||
|
|
||||||
while (TRUE) {
|
|
||||||
gdispDrawPixel(tpReadX(), tpReadY(), Green);
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
Loading…
Add table
Reference in a new issue