main.cpp

00001 #include "mbed.h"
00002 #include "WS2812.h"
00003 
00004 const int size = 300; //number of LED´s
00005       int line = 25;  //length of Flash
00006 DigitalOut myled(LED1);
00007 WS2812 strip (p5,size,6,17,9,14); //mbed 4088:  10,24,20,22    see https://developer.mbed.org/users/bridadan/code/WS2812/ 
00008 
00009 //Ticker speed;
00010 //Ticker baum; 
00011 
00012 
00013 int Buffer[size + 70]; //a buffer is never to big
00014 int dir   =  1;
00015 int spe   =  5;
00016 int spe_2 = 70;
00017 int nd    =  1;
00018 int run_i  = 1;
00019 
00020 // Short Light   {Startposition,Direktion} Startposition must > 10 and < (size-10)
00021 int single[5][2]={{9,1},{140,1},{280,1},{120,-1},{260,-1}};
00022 
00023 
00024 
00025 
00026 
00027 int color_set(uint8_t rot,uint8_t gruen, uint8_t blau, uint8_t alpha)
00028 {
00029   return ((alpha<<24) + (rot<<16) + (gruen<<8) + blau);   
00030 }
00031 
00032 
00033 //change speed
00034 void do_speed()
00035 {
00036   spe_2 = spe_2 + dir;
00037   if (spe_2 > 180) dir = -1;
00038   if (spe_2 < 60) dir =  1;
00039   spe = spe_2/20;
00040 }
00041 
00042 
00043 void do_single(int num,int c)
00044 {
00045  Buffer[single[num][0]] = color_set(((c&0x00FF0000)>>16)-nd%30,
00046  ((c&0x0000FF00)>>8)+nd%35,(c&0x000000FF)+nd%10,250);
00047  double ran = rand()%2;
00048  single[num][0] = single[num][0] + ((ran)* single[num][1]);
00049  if (single[num][0] > (size-13))  single[num][1]= -1;
00050  if (single[num][0] < 8  )  single[num][1] = 1;
00051  Buffer[single[num][0]-3] = color_set(0,0,0,0);
00052  Buffer[single[num][0]-4] = color_set(0,0,0,0);
00053  Buffer[single[num][0]+3] = color_set(0,0,0,0);
00054  Buffer[single[num][0]+4] = color_set(0,0,0,0);
00055 }
00056 
00057 
00058 void do_baum()
00059 {  
00060   for (int i = size - line; i < size; i++)
00061   {
00062     Buffer[i] &= color_set(124+spe*12+nd%60,255-spe*27+nd%45,124-spe*13-nd%35,240-nd%200);
00063     nd+=12;
00064   }
00065 }
00066 
00067 void do_run()
00068 {
00069   if (run_i < line)
00070   {
00071     for (int j = 0; j < spe; j++) Buffer[run_i+j] = color_set(spe*20-nd%15,253-spe*20,124-spe*13+nd%25,240);
00072   } 
00073   else
00074   {
00075     for (int j = 0; j < spe; j++) Buffer[run_i+j]       = color_set(spe*27-nd%25,253-spe*27,124-spe*13+nd%55,240);
00076     for (int j = 0; j < spe; j++) Buffer[run_i+j-line]  = color_set(0,0,0,0);
00077   }
00078   
00079   run_i+=spe;
00080     
00081   if(run_i > size) run_i = 0;   
00082 }
00083 
00084 void show(bool i)
00085 {
00086   do_single(0,0x00ff0000);
00087   do_single(1,0x0006de08);
00088   do_single(2,0x000000df);
00089   do_single(3,0xdeadbeef);
00090   do_single(4,0x00442288);
00091   do_baum();
00092   do_speed();
00093   do_run();
00094   if (i>0) for (int a=0; a<size;a++){ Buffer[a]^= 4294967295;}; 
00095   strip.write(Buffer);   
00096 }
00097 
00098 int main() 
00099 {
00100   while(1)
00101   {
00102     show(0);
00103     myled = !myled;   
00104   }  
00105 }