When you press a button, it lights up the neopixel until the same button is pressed again
Dependencies: mbed WS2812 WS2812_Example PixelArray
main.cpp@0:12cb6f0c2788, 2015-02-12 (annotated)
- Committer:
- bridadan
- Date:
- Thu Feb 12 19:20:00 2015 +0000
- Revision:
- 0:12cb6f0c2788
- Child:
- 1:e04a0ecefa29
Example for WS2812 Library
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
bridadan | 0:12cb6f0c2788 | 1 | #include "mbed.h" |
bridadan | 0:12cb6f0c2788 | 2 | #include "WS2812.h" |
bridadan | 0:12cb6f0c2788 | 3 | #include "PixelArray.h" |
bridadan | 0:12cb6f0c2788 | 4 | |
bridadan | 0:12cb6f0c2788 | 5 | #define WS2812_BUF 60 |
bridadan | 0:12cb6f0c2788 | 6 | |
bridadan | 0:12cb6f0c2788 | 7 | WS2812 ws(D9,WS2812_BUF); |
bridadan | 0:12cb6f0c2788 | 8 | PixelArray px(WS2812_BUF); |
bridadan | 0:12cb6f0c2788 | 9 | |
bridadan | 0:12cb6f0c2788 | 10 | DigitalOut led(LED1); |
bridadan | 0:12cb6f0c2788 | 11 | |
bridadan | 0:12cb6f0c2788 | 12 | int main() |
bridadan | 0:12cb6f0c2788 | 13 | { |
bridadan | 0:12cb6f0c2788 | 14 | |
bridadan | 0:12cb6f0c2788 | 15 | ws.useII(2); // use per-pixel intensity scaling |
bridadan | 0:12cb6f0c2788 | 16 | |
bridadan | 0:12cb6f0c2788 | 17 | // set up the colours we want to draw with |
bridadan | 0:12cb6f0c2788 | 18 | int colorbuf[6] = {0x2f0000,0x2f2f00,0x002f00,0x002f2f,0x00002f,0x2f002f}; |
bridadan | 0:12cb6f0c2788 | 19 | |
bridadan | 0:12cb6f0c2788 | 20 | // for each of the colours (j) write out 10 of them |
bridadan | 0:12cb6f0c2788 | 21 | // the pixels are written at the colour*10, plus the colour position |
bridadan | 0:12cb6f0c2788 | 22 | // all modulus 60 so it wraps around |
bridadan | 0:12cb6f0c2788 | 23 | for (int i =0; i<6; i++) { |
bridadan | 0:12cb6f0c2788 | 24 | for (int j=0; j<10; j++) { |
bridadan | 0:12cb6f0c2788 | 25 | px.Set(((i*10)+j)%60,colorbuf[i]); |
bridadan | 0:12cb6f0c2788 | 26 | } |
bridadan | 0:12cb6f0c2788 | 27 | } |
bridadan | 0:12cb6f0c2788 | 28 | |
bridadan | 0:12cb6f0c2788 | 29 | // now all the colours are computed, add a fade effect using intensity scaling |
bridadan | 0:12cb6f0c2788 | 30 | // compute and write the II value for each pixel |
bridadan | 0:12cb6f0c2788 | 31 | for (int j=0; j<60; j++) { |
bridadan | 0:12cb6f0c2788 | 32 | // px.SetI(pixel position, II value) |
bridadan | 0:12cb6f0c2788 | 33 | px.SetI(j%60, 0xf+(0xf*(j%10))); |
bridadan | 0:12cb6f0c2788 | 34 | } |
bridadan | 0:12cb6f0c2788 | 35 | |
bridadan | 0:12cb6f0c2788 | 36 | |
bridadan | 0:12cb6f0c2788 | 37 | // Now the buffer is written, rotate it |
bridadan | 0:12cb6f0c2788 | 38 | // by writing it out with an increasing offset |
bridadan | 0:12cb6f0c2788 | 39 | while (1) { |
bridadan | 0:12cb6f0c2788 | 40 | for (int z=59; z >= 0 ; z--) { |
bridadan | 0:12cb6f0c2788 | 41 | ws.write_offsets(px.getBuf(),z,z,z); |
bridadan | 0:12cb6f0c2788 | 42 | wait(0.075); |
bridadan | 0:12cb6f0c2788 | 43 | } |
bridadan | 0:12cb6f0c2788 | 44 | } |
bridadan | 0:12cb6f0c2788 | 45 | |
bridadan | 0:12cb6f0c2788 | 46 | } |