main.cpp

00001 #include "mbed.h"
00002 #include "WS2812.h"
00003 #include "PixelArray.h"
00004 
00005 #define WS2812_BUF 60
00006 
00007 WS2812 ws(p5,WS2812_BUF);
00008 PixelArray px(WS2812_BUF);
00009 
00010 DigitalOut led(LED1);
00011 
00012 int main()
00013 {
00014 
00015     ws.useII(2); // use per-pixel intensity scaling
00016 
00017     // set up the colours we want to draw with
00018     int colorbuf[6] = {0x2f0000,0x2f2f00,0x002f00,0x002f2f,0x00002f,0x2f002f};
00019 
00020     // for each of the colours (j) write out 10 of them
00021     // the pixels are written at the colour*10, plus the colour position
00022     // all modulus 60 so it wraps around
00023     for (int i =0; i<6; i++) {
00024         for (int j=0; j<10; j++) {
00025             px.Set(((i*10)+j)%60,colorbuf[i]);
00026         }
00027     }
00028 
00029     // now all the colours are computed, add a fade effect using intensity scaling
00030     // compute and write the II value for each pixel
00031     for (int j=0; j<60; j++) {
00032         // px.SetI(pixel position, II value)
00033         px.SetI(j%60, 0xf+(0xf*(j%10)));
00034     }
00035 
00036 
00037     // Now the buffer is written, rotate it
00038     // by writing it out with an increasing offset
00039     while (1) {
00040         for (int z=59; z >= 0 ; z--) {
00041             ws.write_offsets(px.getBuf(),z,z,z);
00042             wait(0.075);
00043         }
00044     }
00045 
00046 }