RGB LEDS of the neopixels
Dependencies: C12832_lcd PixelArray WS2812 mbed
Fork of WS2812_Example by
main.cpp
- Committer:
- cathal66
- Date:
- 2015-04-16
- Revision:
- 4:7a998a6934f1
- Parent:
- 3:d429d33844c9
- Child:
- 5:60a9e2389a9c
File content as of revision 4:7a998a6934f1:
#include "mbed.h" #include "WS2812.h" #include "PixelArray.h" #define WS2812_BUF 3 #define NUM_COLORS 9 #define NUM_LEDS_PER_COLOR 3 PixelArray px(WS2812_BUF); // See the program page for information on the timing numbers // The given numbers are for the K64F WS2812 ws(p9, WS2812_BUF, 5, 10, 10, 15); int main() { ws.useII(WS2812::PER_PIXEL); // use per-pixel intensity scaling // set up the colours we want to draw with int colorbuf[NUM_COLORS] = {0xfe0000};//,0x00f0ff,0x00ff00,0x00ffff,0xffffff,0x00ff00,0x00ffff,0x0000ff,0xff00ff}; // for each of the colours (j) write out 10 of them // the pixels are written at the colour*10, plus the colour position // all modulus 60 so it wraps around for (int i = 0; i < WS2812_BUF; i++) { px.Set(i, colorbuf[(i / NUM_LEDS_PER_COLOR) % NUM_COLORS]); } // now all the colours are computed, add a fade effect using intensity scaling // compute and write the II value for each pixel for (int j=0; j<WS2812_BUF; j++) { // px.SetI(pixel position, II value) //px.SetI(j%WS2812_BUF, 0xff+(0xf*(j%NUM_LEDS_PER_COLOR))); //full brightness px.SetI(j%WS2812_BUF, 0xf+(0xf*(j%NUM_LEDS_PER_COLOR))); //Dim lighting } // Now the buffer is written, rotate it // by writing it out with an increasing offset while (1) { if(colorbuf[0]>=0xfffffe) { //colorbuf[0]=0x000000; } if(colorbuf[0]^0x000fff>=0x0001ff) { colorbuf[0]=colorbuf[0]+0x000001-0x010000; //colorbuf[0] = 0x000000; } else if(colorbuf[0]^0x00ffff>=0x01ffff) { colorbuf[0]=colorbuf[0]+0x000100-0x000001; } else if(colorbuf[0]<=0xfffffe) { colorbuf[0]=colorbuf[0]+0x010001-0x000100; } for (int i = 0; i < WS2812_BUF; i++) { px.Set(i, colorbuf[(i / NUM_LEDS_PER_COLOR) % NUM_COLORS]); px.SetI(i%WS2812_BUF, 0xf+(0xf*(i%NUM_LEDS_PER_COLOR))); //Dim lighting } for (int z=WS2812_BUF; z >= 0 ; z--) { ws.write_offsets(px.getBuf(),z,z,z); //wait(0.5); } wait(0.01); } }