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@5:60a9e2389a9c, 2015-04-21 (annotated)

Committer:
cathal66
Date:
Tue Apr 21 13:26:10 2015 +0000
Revision:
5:60a9e2389a9c
Parent:
4:7a998a6934f1 
function to control the leds;

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"
cathal66 5:60a9e2389a9c 4 #include "C12832_lcd.h"
bridadan 0:12cb6f0c2788 5
cathal66 3:d429d33844c9 6 #define WS2812_BUF 3
cathal66 3:d429d33844c9 7 #define NUM_COLORS 9
cathal66 3:d429d33844c9 8 #define NUM_LEDS_PER_COLOR 3
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
cathal66 3:d429d33844c9 13 WS2812 ws(p9, WS2812_BUF, 5, 10, 10, 15);
bridadan 0:12cb6f0c2788 14
cathal66 5:60a9e2389a9c 15 //LCD Setup
cathal66 5:60a9e2389a9c 16 C12832_LCD lcd;
cathal66 5:60a9e2389a9c 17
cathal66 5:60a9e2389a9c 18 Serial pc(USBTX, USBRX); // tx, rx
bridadan 0:12cb6f0c2788 19
cathal66 5:60a9e2389a9c 20 void LED_Colour(int red , int green ,int blue , int bright)
cathal66 5:60a9e2389a9c 21 {
cathal66 5:60a9e2389a9c 22 int colorbuf[NUM_COLORS] = {0x000000};
cathal66 5:60a9e2389a9c 23 //int colorbuf[NUM_COLORS] = {0x000000,0x00f0ff,0x00ff00,0x00ffff,0xffffff,0x00ff00,0x00ffff,0x0000ff,0xff00ff};
bridadan 0:12cb6f0c2788 24
cathal66 5:60a9e2389a9c 25 colorbuf[0] = red*0xffff + green*0xff + blue*0x00;
cathal66 3:d429d33844c9 26
cathal66 5:60a9e2389a9c 27 pc.printf("Colour: %x \n\r",colorbuf[0]);
bridadan 0:12cb6f0c2788 28 // for each of the colours (j) write out 10 of them
bridadan 0:12cb6f0c2788 29 // the pixels are written at the colour*10, plus the colour position
bridadan 0:12cb6f0c2788 30 // all modulus 60 so it wraps around
bridadan 2:cb82a3dc4031 31 for (int i = 0; i < WS2812_BUF; i++) {
bridadan 2:cb82a3dc4031 32 px.Set(i, colorbuf[(i / NUM_LEDS_PER_COLOR) % NUM_COLORS]);
bridadan 0:12cb6f0c2788 33 }
bridadan 0:12cb6f0c2788 34
bridadan 0:12cb6f0c2788 35 // now all the colours are computed, add a fade effect using intensity scaling
bridadan 0:12cb6f0c2788 36 // compute and write the II value for each pixel
bridadan 2:cb82a3dc4031 37 for (int j=0; j<WS2812_BUF; j++) {
bridadan 0:12cb6f0c2788 38 // px.SetI(pixel position, II value)
cathal66 3:d429d33844c9 39 //px.SetI(j%WS2812_BUF, 0xff+(0xf*(j%NUM_LEDS_PER_COLOR))); //full brightness
cathal66 5:60a9e2389a9c 40 px.SetI(j%WS2812_BUF, 0xf +(0xf*(j%NUM_LEDS_PER_COLOR))); //Dim lighting
cathal66 5:60a9e2389a9c 41 }
cathal66 5:60a9e2389a9c 42 }
cathal66 5:60a9e2389a9c 43 int main()
cathal66 5:60a9e2389a9c 44 {
bridadan 0:12cb6f0c2788 45
cathal66 5:60a9e2389a9c 46 ws.useII(WS2812::PER_PIXEL); // use per-pixel intensity scaling
cathal66 5:60a9e2389a9c 47
cathal66 3:d429d33844c9 48 while (1) {
cathal66 5:60a9e2389a9c 49
cathal66 5:60a9e2389a9c 50 LED_Colour(125, 125 ,125 , 125);
cathal66 5:60a9e2389a9c 51 wait(1);
bridadan 0:12cb6f0c2788 52 }
bridadan 0:12cb6f0c2788 53 }