cathal deehy-power / Mbed 2 deprecated WS2812_Example_fade

RGB LEDS of the neopixels

Dependencies:   C12832_lcd PixelArray WS2812 mbed

Fork of WS2812_Example by Brian Daniels

main.cpp@4:7a998a6934f1, 2015-04-16 (annotated)

Committer:
cathal66
Date:
Thu Apr 16 09:23:20 2015 +0000
Revision:
4:7a998a6934f1
Parent:
3:d429d33844c9
Child:
5:60a9e2389a9c
fade smooth;

Who changed what in which revision?

UserRevisionLine numberNew 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
cathal66 3:d429d33844c9 5 #define WS2812_BUF 3
cathal66 3:d429d33844c9 6 #define NUM_COLORS 9
cathal66 3:d429d33844c9 7 #define NUM_LEDS_PER_COLOR 3
bridadan 0:12cb6f0c2788 8 PixelArray px(WS2812_BUF);
bridadan 0:12cb6f0c2788 9
bridadan 2:cb82a3dc4031 10 // See the program page for information on the timing numbers
bridadan 1:e04a0ecefa29 11 // The given numbers are for the K64F
cathal66 3:d429d33844c9 12 WS2812 ws(p9, WS2812_BUF, 5, 10, 10, 15);
bridadan 0:12cb6f0c2788 13
bridadan 0:12cb6f0c2788 14 int main()
bridadan 0:12cb6f0c2788 15 {
bridadan 0:12cb6f0c2788 16
bridadan 1:e04a0ecefa29 17 ws.useII(WS2812::PER_PIXEL); // use per-pixel intensity scaling
bridadan 0:12cb6f0c2788 18
bridadan 0:12cb6f0c2788 19 // set up the colours we want to draw with
cathal66 4:7a998a6934f1 20 int colorbuf[NUM_COLORS] = {0xfe0000};//,0x00f0ff,0x00ff00,0x00ffff,0xffffff,0x00ff00,0x00ffff,0x0000ff,0xff00ff};
cathal66 3:d429d33844c9 21
cathal66 3:d429d33844c9 22
cathal66 3:d429d33844c9 23
bridadan 0:12cb6f0c2788 24 // for each of the colours (j) write out 10 of them
bridadan 0:12cb6f0c2788 25 // the pixels are written at the colour*10, plus the colour position
bridadan 0:12cb6f0c2788 26 // all modulus 60 so it wraps around
bridadan 2:cb82a3dc4031 27 for (int i = 0; i < WS2812_BUF; i++) {
bridadan 2:cb82a3dc4031 28 px.Set(i, colorbuf[(i / NUM_LEDS_PER_COLOR) % NUM_COLORS]);
bridadan 0:12cb6f0c2788 29 }
bridadan 0:12cb6f0c2788 30
bridadan 0:12cb6f0c2788 31 // now all the colours are computed, add a fade effect using intensity scaling
bridadan 0:12cb6f0c2788 32 // compute and write the II value for each pixel
bridadan 2:cb82a3dc4031 33 for (int j=0; j<WS2812_BUF; j++) {
bridadan 0:12cb6f0c2788 34 // px.SetI(pixel position, II value)
cathal66 3:d429d33844c9 35 //px.SetI(j%WS2812_BUF, 0xff+(0xf*(j%NUM_LEDS_PER_COLOR))); //full brightness
cathal66 3:d429d33844c9 36 px.SetI(j%WS2812_BUF, 0xf+(0xf*(j%NUM_LEDS_PER_COLOR))); //Dim lighting
bridadan 0:12cb6f0c2788 37 }
bridadan 0:12cb6f0c2788 38
bridadan 0:12cb6f0c2788 39
bridadan 0:12cb6f0c2788 40 // Now the buffer is written, rotate it
bridadan 0:12cb6f0c2788 41 // by writing it out with an increasing offset
cathal66 3:d429d33844c9 42 while (1) {
cathal66 3:d429d33844c9 43 if(colorbuf[0]>=0xfffffe)
cathal66 3:d429d33844c9 44 {
cathal66 4:7a998a6934f1 45 //colorbuf[0]=0x000000;
cathal66 3:d429d33844c9 46 }
cathal66 3:d429d33844c9 47
cathal66 4:7a998a6934f1 48 if(colorbuf[0]^0x000fff>=0x0001ff)
cathal66 3:d429d33844c9 49 {
cathal66 4:7a998a6934f1 50 colorbuf[0]=colorbuf[0]+0x000001-0x010000;
cathal66 3:d429d33844c9 51 //colorbuf[0] = 0x000000;
cathal66 3:d429d33844c9 52 }
cathal66 4:7a998a6934f1 53 else if(colorbuf[0]^0x00ffff>=0x01ffff)
cathal66 3:d429d33844c9 54 {
cathal66 4:7a998a6934f1 55 colorbuf[0]=colorbuf[0]+0x000100-0x000001;
cathal66 3:d429d33844c9 56 }
cathal66 3:d429d33844c9 57 else if(colorbuf[0]<=0xfffffe)
cathal66 3:d429d33844c9 58 {
cathal66 4:7a998a6934f1 59 colorbuf[0]=colorbuf[0]+0x010001-0x000100;
cathal66 3:d429d33844c9 60 }
cathal66 3:d429d33844c9 61
cathal66 3:d429d33844c9 62
cathal66 3:d429d33844c9 63
cathal66 3:d429d33844c9 64
cathal66 3:d429d33844c9 65 for (int i = 0; i < WS2812_BUF; i++) {
cathal66 3:d429d33844c9 66 px.Set(i, colorbuf[(i / NUM_LEDS_PER_COLOR) % NUM_COLORS]);
cathal66 3:d429d33844c9 67 px.SetI(i%WS2812_BUF, 0xf+(0xf*(i%NUM_LEDS_PER_COLOR))); //Dim lighting
cathal66 3:d429d33844c9 68 }
bridadan 2:cb82a3dc4031 69 for (int z=WS2812_BUF; z >= 0 ; z--) {
bridadan 0:12cb6f0c2788 70 ws.write_offsets(px.getBuf(),z,z,z);
cathal66 3:d429d33844c9 71 //wait(0.5);
cathal66 3:d429d33844c9 72
cathal66 3:d429d33844c9 73 }
cathal66 4:7a998a6934f1 74 wait(0.01);
bridadan 0:12cb6f0c2788 75 }
bridadan 0:12cb6f0c2788 76 }