Ryan Savitski / Mbed 2 deprecated LED_multiple_panels

9 tile screen working with one image space, platform for development

Dependencies:   mbed

main.cpp@0:8b26631e8c70, 2012-03-06 (annotated)

Committer:
rsavitski
Date:
Tue Mar 06 19:58:34 2012 +0000
Revision:
0:8b26631e8c70

        

        
Who changed what in which revision?

        

            
                
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#include "mbed.h"





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#include "ledScreen.h"





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// screen instance





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ledScreen screen;





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// sin lookup table and related functions





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unsigned char sinlut[256];





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void initSinLut() {





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    for (int i=0; i<256; i++)





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        sinlut[i] = cos((float)i / 256.0 * (3.14159265 * 2))*127 + 128;





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}





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inline unsigned char lut_sin(int x) {





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    return (x>0)?sinlut[x%256]:sinlut[(-x)%256];





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}





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// Example frame makes:





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//rainbow





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void makeFrame1(unsigned char* data) {





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    static int time=0;





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    time++;





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    // override data with a intensity gradient test pattern





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    for (int x=0; x<3*16; x++) {





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        for (int y=0; y<48; y++) {





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            int i = (x + y*(16*3)) * 3;  // figure out the memory location





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            data[i] = lut_sin((x+y)*255/48+(time/2)%256); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red





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            data[i+1] = lut_sin(((x+y)*255/48+(time/2)+ 85)%256); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red





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            data[i+2] = lut_sin(((x+y)*255/48+(time/2)+170)%256); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red





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        }





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    }





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}





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//cool lines





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void makeFrame2(unsigned char* data) {





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    static int time=0;





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    time++;





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    // override data with a intensity gradient test pattern





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    for (int x=0; x<3*16; x++) {





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        for (int y=0; y<16; y++) {





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            int i = (x + y*(16*3)) * 3;  // figure out the memory location





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            data[i] = lut_sin(x*255/48+(time)%256 + y*16); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red





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            data[i+1] = lut_sin(x*255/48+(time)%256 + y*16 + 85); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red





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            data[i+2] = lut_sin(x*255/48+(time)%256 + y*16 + 170); //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red





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        }





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    }





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}





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// static gradients





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void makeFrame3(unsigned char* data) {





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    static int time=0;





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    time++;





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    // override data with a intensity gradient test pattern





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    for (int x=0; x<3*16; x++) {





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        for (int y=0; y<16; y++) {





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            int i = (x + y*(16*3)) * 3;  // figure out the memory location





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            data[i] = x*256/48; //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red





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            data[i+1] = 0;  // green





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            data[i+2] = y*256/16; //(i/3)%256 ; // blue





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        }





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    }





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}





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void makeFrame33(unsigned char* data) {





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    static int time=0;





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    time++;





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    for (int x=0; x<3*16; x++) {





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        for (int y=0; y<48; y++) {





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            int i = (x + y*(16*3)) * 3;  // figure out the memory location





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            data[i] = x*256/48; //(sin((float)(x+time)/15.0)+1.0)*128 ;   // red





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            data[i+1] = 0;  // green





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            data[i+2] = y*256/48; //(i/3)%256 ; // blue





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        }





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    }





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}





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int main()





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{





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    // framebuffer on client side





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    unsigned char imageSource[256*3*3*3] = { 0 };





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    // prepare sin lookup table (optional)





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    initSinLut(); 





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    // start the screen output, which will keep outputting the frames that are in its internal buffer (updated via .transformFrame)





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    screen.start();





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    while (1) {





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        makeFrame1(imageSource);  // prepare framebuffer with current frame





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        screen.transformFrame(imageSource); // write framebuffer to output framebuffer





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        wait_ms(0.5); // slow down the framerate (optional)





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    }





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}