Oskar Weigl
LED screen driver build for hackspace.
main.cpp
- Committer:
- madcowswe
- Date:
- 2012-02-29
- Revision:
- 1:1af5060b2a34
- Parent:
- 0:f16a1d69a386
File content as of revision 1:1af5060b2a34:
#include "mbed.h"
#include "ledScreen.h"
LocalFileSystem local("local");
// screen instance
ledScreen screen;
// sin lookup table and related functions
unsigned char sinlut[256];
void initSinLut() {
for (int i=0; i<256; i++)
sinlut[i] = cos((float)i / 256.0 * (3.14159265 * 2))*127 + 128;
}
inline unsigned char lut_sin(int x) {
return (x>0)?sinlut[x%256]:sinlut[(-x)%256];
}
// Example frame makes:
//rainbow
void makeFrame1(unsigned char* data) {
static int time=0;
time++;
// override data with a intensity gradient test pattern
for (int x=0; x<3*16; x++) {
for (int y=0; y<16; y++) {
int i = (x + y*(16*3)) * 3; // figure out the memory location
data[i] = lut_sin(x*255/48+(time/2)%256+y); //(sin((float)(x+time)/15.0)+1.0)*128 ; // red
data[i+1] = lut_sin(x*255/48+(time/2)%256 + 85+y); //(sin((float)(x+time)/15.0)+1.0)*128 ; // red
data[i+2] = lut_sin(x*255/48+(time/2)%256 +170+y); //(sin((float)(x+time)/15.0)+1.0)*128 ; // red
}
}
}
// static gradients
void makeFrame3(unsigned char* data) {
static int time=0;
time++;
// override data with a intensity gradient test pattern
for (int x=0; x<3*16; x++) {
for (int y=0; y<16; y++) {
int i = (x + y*(16*3)) * 3; // figure out the memory location
data[i] = x*256/48; //(sin((float)(x+time)/15.0)+1.0)*128 ; // red
data[i+1] = 0; // green
data[i+2] = y*256/16; //(i/3)%256 ; // blue
}
}
}
// wavy animation
void makeFrame4(unsigned char* data) {
static int time=0;
time++;
// override data with a intensity gradient test pattern
for (int x=0; x<3*16; x++) {
for (int y=0; y<16; y++) {
int i = (x%16 + y*16 + (x/16)*256) * 3; // figure out the memory location
data[i] = lut_sin(time*15/16 - x*32 + y*32);
data[i+1] = 0;
data[i+2] = lut_sin((((x-24)*(x-24) + (y-8)*(y-8)) - time/1));
}
}
}
// stars + smoothed (convolved) travelling comet
void makeFrame7(unsigned char* data) {
static int time=0;
//stars
data[rand()%(3*16*16*3)] = 255;
//increment time
time++;
//Do convolution
for (int x=1; x<47; x++) { // ignore first and last column
for (int y=1; y<15; y++) {
if (time%2) {
data[x*3+y*3*48] = ((data[x*3+y*3*48]*30)/32 + (data[(x+1)*3+y*3*48]*1)/32 + (data[(x-1)*3+y*3*48]*1)/32);
data[x*3+y*3*48 +1] = ((data[x*3+y*3*48 +1]*30)/32 + (data[(x+1)*3+y*3*48 +1]*1)/32 + (data[(x-1)*3+y*3*48 +1]*1)/32);
data[x*3+y*3*48 +2] = ((data[x*3+y*3*48 +2]*30)/32 + (data[(x+1)*3+y*3*48 +2]*1)/32 + (data[(x-1)*3+y*3*48 +2]*1)/32);
} else {
data[x*3+y*3*48] = ((data[x*3+y*3*48]*30)/32 + (data[(x)*3+(y+1)*3*48]*1)/32 + (data[(x)*3+(y-1)*3*48]*1)/32);
data[x*3+y*3*48 +1] = ((data[x*3+y*3*48 +1]*30)/32 + (data[(x)*3+(y+1)*3*48 +1]*1)/32 + (data[(x)*3+(y-1)*3*48 +1]*1)/32);
data[x*3+y*3*48 +2] = ((data[x*3+y*3*48 +2]*30)/32 + (data[(x)*3+(y+1)*3*48 +2]*1)/32 + (data[(x)*3+(y-1)*3*48 +2]*1)/32);
}
}
}
// handle the border
for (int y=0; y<16; y++) {
if (time%2) {
int x=0;
data[x*3+y*3*48] = (data[x*3+y*3*48]*30)/32 + (data[(x+1)*3+y*3*48]*1)/32 ;
data[x*3+y*3*48 +1] = (data[x*3+y*3*48 +1]*30)/32 + (data[(x+1)*3+y*3*48 +1]*1)/32 ;
data[x*3+y*3*48 +2] = (data[x*3+y*3*48 +2]*30)/32 + (data[(x+1)*3+y*3*48 +2]*1)/32 ;
x=47;
data[x*3+y*3*48] = ((data[x*3+y*3*48]*30)/32 + (data[(x-1)*3+y*3*48]*1)/32);
data[x*3+y*3*48 +1] = ((data[x*3+y*3*48 +1]*30)/32 + (data[(x-1)*3+y*3*48 +1]*1)/32);
data[x*3+y*3*48 +2] = ((data[x*3+y*3*48 +2]*30)/32 + (data[(x-1)*3+y*3*48 +2]*1)/32);
}
}
for (int x=0; x<48; x++) {
if (!(time%2)) {
int y=0;
data[x*3+y*3*48] = ((data[x*3+y*3*48]*30)/32 + (data[(x)*3+(y+1)*3*48]*1)/32);
data[x*3+y*3*48 +1] = ((data[x*3+y*3*48 +1]*30)/32 + (data[(x)*3+(y+1)*3*48 +1]*1)/32);
data[x*3+y*3*48 +2] = ((data[x*3+y*3*48 +2]*30)/32 + (data[(x)*3+(y+1)*3*48 +2]*1)/32);
y=15;
data[x*3+y*3*48] = ((data[x*3+y*3*48]*30)/32 + (data[(x)*3+(y-1)*3*48]*1)/32);
data[x*3+y*3*48 +1] = ((data[x*3+y*3*48 +1]*30)/32 + (data[(x)*3+(y-1)*3*48 +1]*1)/32);
data[x*3+y*3*48 +2] = ((data[x*3+y*3*48 +2]*30)/32 + (data[(x)*3+(y-1)*3*48 +2]*1)/32);
}
}
// determine current comet location
int ballx = (8 + sin((float)time/25)*4+sin((float)time/17)*3+sin((float)time/13)*2)*3;
int bally = 8 + sin((float)time/12)*4+sin((float)time/15)*3+sin((float)time/14)*2;
unsigned char r = lut_sin(time);
unsigned char g = lut_sin(time*15/16);
unsigned char b = lut_sin(time*17/16);
// saturate brightness to a certain level
while ((int)r+g+b<255) {
r++;
g++;
b++;
};
// write the circle of the comet to the buffer
for (int x=-2; x<=2; x++) {
for (int y=-2; y<=2; y++) {
if (x*x + y*y<1.5 ) {
if (x+ballx<16*3 && x+ballx>=0 && y+bally<16 && y+bally>=0) {
int i = (x+ballx)*3 + (y+bally)*3*48;
data[i] = r;
data[i+1] = g;
data[i+2] = b;
}
}
}
}
}
struct charsz{
unsigned char width;
unsigned int data;
charsz() {
width=0;
}
charsz(char c) {
width=0;
}
bool get(int x, int y)
{
return data & (1 << (y * 5 + x));
}
};
#define _C(a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y) \
((a) | (b << 1) | (c << 2) | (d << 3) | (e << 4) | \
(f << 5) | (g << 6) | (h << 7) | (i << 8) | (j << 9) | \
(k << 10) | (l << 11) | (m << 12) | (n << 13) | (o << 14) | \
(p << 15) | (q << 16) | (r << 17) | (s << 18) | (t << 19) | \
(u << 20) | (v << 21) | (w << 22) | (x << 23) | (y << 24))
static charsz numbers[128];
int charToScreen(int xco,int yco, char d, unsigned char *data, unsigned int colour)
{
for(int x=0; x<numbers[d].width; x++)
for(int y=0; y<5; y++)
for(unsigned int col = 0; col < 3; ++col)
//data[3 * ((x+xco) + (y+yco) * 48) + col] = numbers[d].get(x,y) ? ((colour & (0xFF << ((2-col)*8))) >> ((2-col)*8) ) : 0;
if (numbers[d].get(x,y) && xco+x<48 && x+xco >= 0)
data[3 * ((x+xco) + (y+yco) * 48) + col] = ((colour & (0xFF << ((2-col)*8))) >> ((2-col)*8) );
return numbers[d].width;
}
void printString(const char *s, float xco, int yco, unsigned char *data, unsigned int col)
{
unsigned int len = strlen(s);
for (int d=0; d < len; ++d)
{
if(xco >= -numbers[s[d]].width && xco < 48)
charToScreen(xco,yco,s[d],data,col);
xco += numbers[s[d]].width + 1;
}
}
void fadeFrame(unsigned char* data, float amount)
{
for (int x = 0; x < 48; x++)
for (int y = 0; y < 16; y++)
{
data[x*3+y*3*48]-=amount;
data[x*3+y*3*48+1]-=amount;
data[x*3+y*3*48+2]-=amount;
}
}
// Scroll text
class scrollingText {
public:
const char *s;
int xco;
int yco;
unsigned char *data;
unsigned int col;
float scroller;
float scrollspeed;
scrollingText(const char *sp, int xcop, int ycop, unsigned char *datap, unsigned int colp, float scrollspeedp)
: s(sp), xco(xcop), yco(ycop), data(datap), col(colp), scroller(0), scrollspeed(scrollspeedp) {}
void update()
{
//printString(s, xco+(int)scroller, yco, data, col);
printString(s, xco+scroller, yco, data, col);
unsigned int len = strlen(s);
int actualStringLength = len+1;
for (int d=0; d < len; ++d) { actualStringLength += numbers[d].width; }
if ((int)scroller+xco < -actualStringLength) { scroller=48-xco; }
scroller-=scrollspeed;
}
};
// Binary counter timer
Timer t;
// Read file counter
Timer s;
char *txt = NULL;
void makeFrame9(unsigned char* data) {
fadeFrame(data, 255);
/*
//0 screen
for(unsigned int x = 0; x < 48; ++x)
for(unsigned int y = 0; y < 16; ++y)
for(unsigned int col = 0; col < 3; ++col)
data[3 * ((x) + y * 48) + col] = 0;
*/
time_t seconds = time(NULL);
//uptime!
static scrollingText uptimeText(txt, 4, 1, data, 0xFF0000, 0.1);
uptimeText.update();
int yoff=6;
unsigned int startX = 7;
for(unsigned int x = 0; x < 32; ++x)
for(unsigned int y = 0; y < 4; ++y)
for(unsigned int col = 0; col < 3; ++col)
//data[3 * ((x+startX) + (y+yoff) * 48) + col] = (col == 0 ? ((seconds & (1 << (31-x))) ? 255 : 0) : 0);
if(((int)(t.read()*50) & (1 << (31-x))) && col == 0)
data[3 * ((x+startX) + (y+yoff) * 48) + col] = 255;
int day = (seconds/(3600*24))%10;
int hour = (seconds/3600)%24;
int min = (seconds/60)%60;
int sec = (seconds)%60;
char digits[11] = {day+'0',':', (hour/10)+'0', hour%10+'0', ':', min/10+'0', min%10+'0', ':', sec/10+'0', sec%10+'0', 0};
printString(digits, 4, 10, data, 0x0000FF);
}
void readTextFromMBed()
{
//txt = "test";
//stringy
FILE *set = fopen("/local/scroller.txt", "r"); // Open "scroller.txt" on the local file system for read
if(set)
{
fseek(set, 0L, SEEK_END);
int sz = ftell(set);
fseek(set, 0L, SEEK_SET);
if(txt)
free(txt);
txt = (char *) malloc(sz);
fread(txt, sz, sz, set);
fclose(set);
}
else
{
txt = "File not found";
}
}
void initCharArray();
int main()
{
initCharArray();
readTextFromMBed();
set_time(0);
s.reset();
t.start();
int time=0; // optional
int frametype=1; // optional
// framebuffer on client side
unsigned char imageSource[256*3*3] = { 0 };
// prepare sin lookup table (optional)
initSinLut();
// start the screen output, which will keep outputting the frames that are in its internal buffer (updated via .transformFrame)
screen.start();
while (1) {
// Reload the file every 60 seconds
if(s.read()>60)
{
//readTextFromMBed();
//s.reset();
}
time++; //optional
if(time%5000 == 0){
frametype = (frametype+1)%5;
if (frametype == 0)
time = 4500;
}
switch (frametype)
{
case 0:
makeFrame9(imageSource);
break;
case 1:
makeFrame4(imageSource);
break;
case 2:
makeFrame7(imageSource);
break;
case 3:
makeFrame7(imageSource);
break;
case 4:
makeFrame1(imageSource);
break;
}
//makeFrame2(imageSource); // prepare framebuffer with current frame
screen.transformFrame(imageSource); // write framebuffer to output framebuffer
wait_ms(1); // slow down the framerate (optional)
}
}
////////////////////////////////
///////STOPPP!!!!!!!
//////////GO BACK!!!!!!!
///////////////////////////////
void initCharArray()
{
for(int i=0; i<128; i++){
numbers[i].width=3;
numbers[i].data=_C(1,1,1,0,0,
0,0,1,0,0,
0,1,1,0,0,
0,0,0,0,0,
0,1,0,0,0);
}
numbers['A'].width=3;
numbers['A'].data=_C(1,1,1,0,0,
1,0,1,0,0,
1,1,1,0,0,
1,0,1,0,0,
1,0,1,0,0);
numbers['B'].width=3;
numbers['B'].data=_C(1,1,0,0,0,
1,0,1,0,0,
1,1,0,0,0,
1,0,1,0,0,
1,1,0,0,0);
numbers['C'].width=3;
numbers['C'].data=_C(1,1,1,0,0,
1,0,0,0,0,
1,0,0,0,0,
1,0,0,0,0,
1,1,1,0,0);
numbers['D'].width=3;
numbers['D'].data=_C(1,1,0,0,0,
1,0,1,0,0,
1,0,1,0,0,
1,0,1,0,0,
1,1,0,0,0);
numbers['E'].width=3;
numbers['E'].data=_C(1,1,1,0,0,
1,0,0,0,0,
1,1,1,0,0,
1,0,0,0,0,
1,1,1,0,0);
numbers['F'].width=3;
numbers['F'].data=_C(1,1,1,0,0,
1,0,0,0,0,
1,1,1,0,0,
1,0,0,0,0,
1,0,0,0,0);
numbers['G'].width=3;
numbers['G'].data=_C(1,1,1,0,0,
1,0,0,0,0,
1,0,0,0,0,
1,0,1,0,0,
1,1,1,0,0);
numbers['H'].width=3;
numbers['H'].data=_C(1,0,1,0,0,
1,0,1,0,0,
1,1,1,0,0,
1,0,1,0,0,
1,0,1,0,0);
numbers['I'].width=3;
numbers['I'].data=_C(1,1,1,0,0,
0,1,0,0,0,
0,1,0,0,0,
0,1,0,0,0,
1,1,1,0,0);
numbers['J'].width=4;
numbers['J'].data=_C(0,1,1,1,0,
0,0,1,0,0,
0,0,1,0,0,
1,0,1,0,0,
0,1,0,0,0);
numbers['K'].width=4;
numbers['K'].data=_C(1,0,0,1,0,
1,0,1,0,0,
1,1,1,0,0,
1,0,1,0,0,
1,0,0,1,0);
numbers['L'].width=3;
numbers['L'].data=_C(1,0,0,0,0,
1,0,0,0,0,
1,0,0,0,0,
1,0,0,0,0,
1,1,1,0,0);
numbers['M'].width=5;
numbers['M'].data=_C(1,1,0,1,1,
1,1,1,1,1,
1,0,1,0,1,
1,0,0,0,1,
1,0,0,0,1);
numbers['N'].width=4;
numbers['N'].data=_C(1,0,0,1,0,
1,1,0,1,0,
1,1,1,1,0,
1,0,1,1,0,
1,0,0,1,0);
numbers['O'].width=3;
numbers['O'].data=_C(1,1,1,0,0,
1,0,1,0,0,
1,0,1,0,0,
1,0,1,0,0,
1,1,1,0,0);
numbers['P'].width=3;
numbers['P'].data=_C(1,1,1,0,0,
1,0,1,0,0,
1,1,1,0,0,
1,0,0,0,0,
1,0,0,0,0);
numbers['Q'].width=3;
numbers['Q'].data=_C(0,1,1,0,0,
1,0,0,1,0,
1,0,0,1,0,
1,0,1,1,0,
0,1,1,1,0);
numbers['R'].width=3;
numbers['R'].data=_C(1,1,1,0,0,
1,0,1,0,0,
1,1,1,0,0,
1,1,0,0,0,
1,0,1,0,0);
numbers['S'].width=3;
numbers['S'].data=_C(1,1,1,0,0,
1,0,0,0,0,
1,1,1,0,0,
0,0,1,0,0,
1,1,1,0,0);
numbers['T'].width=3;
numbers['T'].data=_C(1,1,1,0,0,
0,1,0,0,0,
0,1,0,0,0,
0,1,0,0,0,
0,1,0,0,0);
numbers['U'].width=3;
numbers['U'].data=_C(1,0,1,0,0,
1,0,1,0,0,
1,0,1,0,0,
1,0,1,0,0,
1,1,1,0,0);
numbers['V'].width=3;
numbers['V'].data=_C(1,0,1,0,0,
1,0,1,0,0,
1,0,1,0,0,
1,0,1,0,0,
0,1,0,0,0);
numbers['W'].width=5;
numbers['W'].data=_C(1,0,0,0,1,
1,0,0,0,1,
1,0,1,0,1,
1,1,1,1,1,
0,1,0,1,0);
numbers['X'].width=3;
numbers['X'].data=_C(1,0,1,0,0,
1,0,1,0,0,
0,1,0,0,0,
1,1,1,0,0,
1,0,1,0,0);
numbers['Y'].width=3;
numbers['Y'].data=_C(1,0,1,0,0,
1,0,1,0,0,
0,1,0,0,0,
0,1,0,0,0,
0,1,0,0,0);
numbers['Z'].width=3;
numbers['Z'].data=_C(1,1,1,0,0,
0,0,1,0,0,
0,1,0,0,0,
1,0,0,0,0,
1,1,1,0,0);
numbers['\''].width=1;
numbers['\''].data=_C(1,0,0,0,0,
1,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0);
numbers['"'].width=3;
numbers['"'].data=_C(1,0,1,0,0,
1,0,1,0,0,
0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0);
numbers[' '].width=1;
numbers[' '].data=_C(0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0);
numbers[':'].width=1;
numbers[':'].data=_C(0,0,0,0,0,
1,0,0,0,0,
0,0,0,0,0,
1,0,0,0,0,
0,0,0,0,0);
numbers['0'].width=3;
numbers['0'].data=_C(1,1,1,0,0,
1,0,1,0,0,
1,0,1,0,0,
1,0,1,0,0,
1,1,1,0,0);
numbers['1'].width=1;
numbers['1'].data=_C(1,0,0,0,0,
1,0,0,0,0,
1,0,0,0,0,
1,0,0,0,0,
1,0,0,0,0);
numbers['2'].width=3;
numbers['2'].data=_C(1,1,1,0,0,
0,0,1,0,0,
1,1,1,0,0,
1,0,0,0,0,
1,1,1,0,0);
numbers['3'].width=3;
numbers['3'].data=_C(1,1,1,0,0,
0,0,1,0,0,
1,1,1,0,0,
0,0,1,0,0,
1,1,1,0,0);
numbers['4'].width=3;
numbers['4'].data=_C(1,0,1,0,0,
1,0,1,0,0,
1,1,1,0,0,
0,0,1,0,0,
0,0,1,0,0);
numbers['5'].width=3;
numbers['5'].data=_C(1,1,1,0,0,
1,0,0,0,0,
1,1,1,0,0,
0,0,1,0,0,
1,1,1,0,0);
numbers['6'].width=3;
numbers['6'].data=_C(1,1,1,0,0,
1,0,0,0,0,
1,1,1,0,0,
1,0,1,0,0,
1,1,1,0,0);
numbers['7'].width=3;
numbers['7'].data=_C(1,1,1,0,0,
0,0,1,0,0,
0,0,1,0,0,
0,0,1,0,0,
0,0,1,0,0);
numbers['8'].width=3;
numbers['8'].data=_C(1,1,1,0,0,
1,0,1,0,0,
1,1,1,0,0,
1,0,1,0,0,
1,1,1,0,0);
numbers['9'].width=3;
numbers['9'].data=_C(1,1,1,0,0,
1,0,1,0,0,
1,1,1,0,0,
0,0,1,0,0,
0,0,1,0,0);
numbers['.'].width=1;
numbers['.'].data=_C(0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0,
1,0,0,0,0);
numbers['|'].width=1;
numbers['|'].data=_C(1,0,0,0,0,
1,0,0,0,0,
1,0,0,0,0,
1,0,0,0,0,
1,0,0,0,0);
numbers[')'].width=2;
numbers[')'].data=_C(1,0,0,0,0,
0,1,0,0,0,
0,1,0,0,0,
0,1,0,0,0,
1,0,0,0,0);
numbers['('].width=2;
numbers['('].data=_C(0,1,0,0,0,
1,0,0,0,0,
1,0,0,0,0,
1,0,0,0,0,
0,1,0,0,0);
numbers['+'].width=3;
numbers['+'].data=_C(0,0,0,0,0,
0,1,0,0,0,
1,1,1,0,0,
0,1,0,0,0,
0,0,0,0,0);
numbers['-'].width=3;
numbers['-'].data=_C(0,0,0,0,0,
0,0,0,0,0,
1,1,1,0,0,
0,0,0,0,0,
0,0,0,0,0);
numbers[';'].width=2;
numbers[';'].data=_C(0,0,0,0,0,
0,1,0,0,0,
0,0,0,0,0,
0,1,0,0,0,
1,0,0,0,0);
numbers['>'].width=3;
numbers['>'].data=_C(1,0,0,0,0,
0,1,0,0,0,
0,0,1,0,0,
0,1,0,0,0,
1,0,0,0,0);
numbers[','].width=2;
numbers[','].data=_C(0,0,0,0,0,
0,0,0,0,0,
0,0,0,0,0,
0,1,0,0,0,
1,0,0,0,0);
numbers['_'] = numbers[' '];
numbers['a'] = numbers['A'];
numbers['b'] = numbers['B'];
numbers['c'] = numbers['C'];
numbers['d'] = numbers['D'];
numbers['e'] = numbers['E'];
numbers['f'] = numbers['F'];
numbers['g'] = numbers['G'];
numbers['h'] = numbers['H'];
numbers['i'] = numbers['I'];
numbers['j'] = numbers['J'];
numbers['k'] = numbers['K'];
numbers['l'] = numbers['L'];
numbers['m'] = numbers['M'];
numbers['n'] = numbers['N'];
numbers['o'] = numbers['O'];
numbers['p'] = numbers['P'];
numbers['q'] = numbers['Q'];
numbers['r'] = numbers['R'];
numbers['s'] = numbers['S'];
numbers['t'] = numbers['T'];
numbers['u'] = numbers['U'];
numbers['v'] = numbers['V'];
numbers['w'] = numbers['W'];
numbers['x'] = numbers['X'];
numbers['y'] = numbers['Y'];
numbers['z'] = numbers['Z'];
}