Code to control an individually addressable RGB strip.
Dependencies: mbed WS2812 PixelArray
main.cpp
- Committer:
- ahdyer
- Date:
- 2019-12-14
- Revision:
- 0:b47973ee96a9
File content as of revision 0:b47973ee96a9:
#include "mbed.h" #include "WS2812.h" #include "PixelArray.h" #define WS2812_BUF 30 #define NUM_COLORS 6 #define NUM_LEDS_PER_COLOR 1 PixelArray px(WS2812_BUF); // See the program page for information on the timing numbers // The given numbers are for the K64F WS2812 ws(D9, WS2812_BUF, 3, 11, 10, 11); 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] = {0xfffff0,0xffff00,0xfff000,0xff0000,0xf00000,0xffffff}; // 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, 0x0f); } // Now the buffer is written, rotate it // by writing it out with an increasing offset while (1) { for (int z=WS2812_BUF; z >= 0 ; z--) { ws.write_offsets(px.getBuf(),z,z,z); wait(0.075); } } }