yacine sidhoum / Mbed 2 deprecated WS2812_Example2_random_couleur_position_led_v4

control multi animation ledws2812 by usb serial com

Dependencies:   PixelArray WS2812 mbed

Fork of WS2812_Example by Brian Daniels

main.cpp@2:cb82a3dc4031, 2015-02-12 (annotated)

Committer:
bridadan
Date:
Thu Feb 12 21:55:24 2015 +0000
Revision:
2:cb82a3dc4031
Parent:
1:e04a0ecefa29
Child:
3:e59164341b18
K64F timings in demo

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
bridadan 2:cb82a3dc4031 5 #define WS2812_BUF 150
bridadan 2:cb82a3dc4031 6 #define NUM_COLORS 6
bridadan 2:cb82a3dc4031 7 #define NUM_LEDS_PER_COLOR 10
bridadan 0:12cb6f0c2788 8
bridadan 0:12cb6f0c2788 9 PixelArray px(WS2812_BUF);
bridadan 0:12cb6f0c2788 10
bridadan 2:cb82a3dc4031 11 // See the program page for information on the timing numbers
bridadan 1:e04a0ecefa29 12 // The given numbers are for the K64F
bridadan 2:cb82a3dc4031 13 WS2812 ws(D9, WS2812_BUF, 0, 5, 5, 0);
bridadan 0:12cb6f0c2788 14
bridadan 0:12cb6f0c2788 15 int main()
bridadan 0:12cb6f0c2788 16 {
bridadan 0:12cb6f0c2788 17
bridadan 1:e04a0ecefa29 18 ws.useII(WS2812::PER_PIXEL); // use per-pixel intensity scaling
bridadan 0:12cb6f0c2788 19
bridadan 0:12cb6f0c2788 20 // set up the colours we want to draw with
bridadan 2:cb82a3dc4031 21 int colorbuf[NUM_COLORS] = {0x2f0000,0x2f2f00,0x002f00,0x002f2f,0x00002f,0x2f002f};
bridadan 0:12cb6f0c2788 22
bridadan 0:12cb6f0c2788 23 // for each of the colours (j) write out 10 of them
bridadan 0:12cb6f0c2788 24 // the pixels are written at the colour*10, plus the colour position
bridadan 0:12cb6f0c2788 25 // all modulus 60 so it wraps around
bridadan 2:cb82a3dc4031 26 for (int i = 0; i < WS2812_BUF; i++) {
bridadan 2:cb82a3dc4031 27 px.Set(i, colorbuf[(i / NUM_LEDS_PER_COLOR) % NUM_COLORS]);
bridadan 0:12cb6f0c2788 28 }
bridadan 0:12cb6f0c2788 29
bridadan 0:12cb6f0c2788 30 // now all the colours are computed, add a fade effect using intensity scaling
bridadan 0:12cb6f0c2788 31 // compute and write the II value for each pixel
bridadan 2:cb82a3dc4031 32 for (int j=0; j<WS2812_BUF; j++) {
bridadan 0:12cb6f0c2788 33 // px.SetI(pixel position, II value)
bridadan 2:cb82a3dc4031 34 px.SetI(j%WS2812_BUF, 0xf+(0xf*(j%NUM_LEDS_PER_COLOR)));
bridadan 0:12cb6f0c2788 35 }
bridadan 0:12cb6f0c2788 36
bridadan 0:12cb6f0c2788 37
bridadan 0:12cb6f0c2788 38 // Now the buffer is written, rotate it
bridadan 0:12cb6f0c2788 39 // by writing it out with an increasing offset
bridadan 0:12cb6f0c2788 40 while (1) {
bridadan 2:cb82a3dc4031 41 for (int z=WS2812_BUF; z >= 0 ; z--) {
bridadan 0:12cb6f0c2788 42 ws.write_offsets(px.getBuf(),z,z,z);
bridadan 0:12cb6f0c2788 43 wait(0.075);
bridadan 0:12cb6f0c2788 44 }
bridadan 0:12cb6f0c2788 45 }
bridadan 0:12cb6f0c2788 46
bridadan 0:12cb6f0c2788 47 }