TaChing Yu / Mbed 2 deprecated WS2812_Test

1

Dependencies:   PixelArray WS2812 mbed

main.cpp@0:2024cf2d17f8, 2016-09-07 (annotated)

Committer:
yu10078999
Date:
Wed Sep 07 14:20:53 2016 +0000
Revision:
0:2024cf2d17f8
0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yu10078999 0:2024cf2d17f8 1 #include "mbed.h"
yu10078999 0:2024cf2d17f8 2 #include "WS2812.h"
yu10078999 0:2024cf2d17f8 3 #include "PixelArray.h"
yu10078999 0:2024cf2d17f8 4
yu10078999 0:2024cf2d17f8 5 #define WS2812_BUF 150
yu10078999 0:2024cf2d17f8 6 #define NUM_COLORS 6
yu10078999 0:2024cf2d17f8 7 #define NUM_LEDS_PER_COLOR 3
yu10078999 0:2024cf2d17f8 8
yu10078999 0:2024cf2d17f8 9 PixelArray px(WS2812_BUF);
yu10078999 0:2024cf2d17f8 10
yu10078999 0:2024cf2d17f8 11 // See the program page for information on the timing numbers
yu10078999 0:2024cf2d17f8 12 // The given numbers are for the K64F
yu10078999 0:2024cf2d17f8 13 WS2812 ws(D9, WS2812_BUF, 10, 15, 20, 25);
yu10078999 0:2024cf2d17f8 14 //WS2812 ws(D9, WS2812_BUF, 10, 15, 20, 35);
yu10078999 0:2024cf2d17f8 15 int main()
yu10078999 0:2024cf2d17f8 16 {
yu10078999 0:2024cf2d17f8 17
yu10078999 0:2024cf2d17f8 18 ws.useII(WS2812::PER_PIXEL); // use per-pixel intensity scaling
yu10078999 0:2024cf2d17f8 19
yu10078999 0:2024cf2d17f8 20 // set up the colours we want to draw with
yu10078999 0:2024cf2d17f8 21 int colorbuf[NUM_COLORS] = {0x2f0000,0x2f2f00,0x002f00,0x002f2f,0x00002f,0x2f002f};
yu10078999 0:2024cf2d17f8 22
yu10078999 0:2024cf2d17f8 23 // for each of the colours (j) write out 10 of them
yu10078999 0:2024cf2d17f8 24 // the pixels are written at the colour*10, plus the colour position
yu10078999 0:2024cf2d17f8 25 // all modulus 60 so it wraps around
yu10078999 0:2024cf2d17f8 26 for (int i = 0; i < WS2812_BUF; i++) {
yu10078999 0:2024cf2d17f8 27 px.Set(i, colorbuf[(i / NUM_LEDS_PER_COLOR) % NUM_COLORS]);
yu10078999 0:2024cf2d17f8 28 }
yu10078999 0:2024cf2d17f8 29
yu10078999 0:2024cf2d17f8 30 // now all the colours are computed, add a fade effect using intensity scaling
yu10078999 0:2024cf2d17f8 31 // compute and write the II value for each pixel
yu10078999 0:2024cf2d17f8 32 for (int j=0; j<WS2812_BUF; j++) {
yu10078999 0:2024cf2d17f8 33 // px.SetI(pixel position, II value)
yu10078999 0:2024cf2d17f8 34 px.SetI(j%WS2812_BUF, 0xf+(0xf*(j%NUM_LEDS_PER_COLOR)));
yu10078999 0:2024cf2d17f8 35 }
yu10078999 0:2024cf2d17f8 36
yu10078999 0:2024cf2d17f8 37
yu10078999 0:2024cf2d17f8 38 // Now the buffer is written, rotate it
yu10078999 0:2024cf2d17f8 39 // by writing it out with an increasing offset
yu10078999 0:2024cf2d17f8 40 while (1) {
yu10078999 0:2024cf2d17f8 41 for (int z=WS2812_BUF; z >= 0 ; z--) {
yu10078999 0:2024cf2d17f8 42 ws.write_offsets(px.getBuf(),z,z,z);
yu10078999 0:2024cf2d17f8 43 wait(0.075);
yu10078999 0:2024cf2d17f8 44 }
yu10078999 0:2024cf2d17f8 45 }
yu10078999 0:2024cf2d17f8 46
yu10078999 0:2024cf2d17f8 47 }