File content as of revision 1:bf4d674d3692:

#include "mbed.h"
#include "WS2812.h"
#include "PixelArray.h"

#define WS2812_BUF 60

WS2812 ws(p5,WS2812_BUF);
PixelArray px(WS2812_BUF);

DigitalOut led(LED1);

int main()
{

    int ctr=0;
    ws.useII(2); // use per-pixel intensity scaling

    // set up the colours we want to draw with
    int colorbuf[6] = {0x2f0000,0x2f2f00,0x002f00,0x002f2f,0x00002f,0x2f002f};


    int h=0;

    // for each of the colours (j) write out 10 of them
    // the pixel get written at the rotation offset, plus the colour*10, plus the colour position
    // all modulus 60 so it wraps around
    for (int i =0; i<6; i++) {
        for (int j=0; j<10; j++) {
            px.Set((h+(i*10)+j)%60,colorbuf[i]);
        }
    }

    // now all the colours are computed, add a fade effect
    // compute and write the II value for each pixel
    for (int j=0; j<60; j++) {
        // px.SetI(pixel position, II value)
        px.SetI(    (h+j)%60,   0xf+(0xf*(j%10)));
    }

    // the buffer is written
    // rotate by writing it out with an increasing offset


    while (1) {
        for (int z=59; z >= 0 ; z--) {
            ws.write_offsets(px.getBuf(),z,z,z); // write out the buffer
            wait(0.075);
            if (ctr==1000) {
                ctr=0;
                led=!led;
            } else {
                ctr++;
            }
        }
    }

}