main.cpp

00001 #include "mbed.h"
00002 #include "WS2812.h"
00003 #include "PixelArray.h"
00004 
00005 #define WS2812_BUF 77   //number of LEDs in the array
00006 #define NUM_COLORS 6    //number of colors to store in the array
00007 
00008 DigitalIn usrBtn(USER_BUTTON);
00009 DigitalOut usrLed(LED1);
00010 PixelArray px(WS2812_BUF);
00011 
00012 // See the program page for information on the timing numbers
00013 WS2812 ws(D9, WS2812_BUF, 6,17,9,14);   //nucleo-f411re
00014 
00015 int main()
00016 {
00017     int btnState = 0;
00018     
00019     ws.useII(WS2812::PER_PIXEL); // use per-pixel intensity scaling
00020     
00021     // set up the colours we want to draw with
00022     int colorbuf[NUM_COLORS] = {0x2f0000,0x2f2f00,0x002f00,0x002f2f,0x00002f,0x2f002f};
00023     
00024     // Now the buffer is written, write it to the led array.
00025     while (1) 
00026     {
00027         if (usrBtn == 0)    //button is pressed
00028         { 
00029             usrLed = 1;
00030             btnState = btnState++;
00031             
00032             if (btnState == NUM_COLORS) {
00033                 btnState = 0;
00034             }
00035         } 
00036         else 
00037         {
00038             usrLed = 0;
00039         }
00040         
00041         //write the color value for each pixel
00042         px.SetAll(colorbuf[btnState]);
00043         
00044         //write the II value for each pixel
00045         px.SetAllI(64);
00046         
00047         for (int i = WS2812_BUF; i >= 0; i--) 
00048         {
00049             ws.write(px.getBuf());
00050         }
00051     }
00052 }