uGFX/ugfx
2
0
Fork 0
Code Issues 2 Pull Requests Projects Releases Wiki Activity

added mandelbrot demo

Browse Source
This commit is contained in:
Joel Bodenmann 2012-10-23 22:44:54 +02:00
parent 216c5471ca
commit 1909342055
4 changed files with 124 additions and 95 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
demos/lcd/main.c
View File

@ -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
View 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
View 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;
}
}

56
demos/touchpad/main.c
View File

@ -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);
}
}