David Rhodes / LPC1114_Neopixel

Library and demo using the WS2812-based Neopixel strip connected to an LPC114

Dependencies:   mbed

Fork of LEDTape_WS2812 by Suga koubou

Details here: http://mbed.org/users/rhodes42/notebook/tiny-neopixel-controller-with-lpc1114/

LEDStripFunctions.cpp@3:743570d993aa, 2014-04-08 (annotated)

Committer:
rhodes42
Date:
Tue Apr 08 20:56:03 2014 +0000
Revision:
3:743570d993aa
Parent:
2:61abc599f31f 
added scalebrightness and changed main demo

Who changed what in which revision?

UserRevisionLine numberNew contents of line
rhodes42 2:61abc599f31f 1 #include "mbed.h"
rhodes42 2:61abc599f31f 2 #include "LEDStrip.h"
rhodes42 2:61abc599f31f 3 #include <stdint.h>
rhodes42 2:61abc599f31f 4
rhodes42 2:61abc599f31f 5
rhodes42 2:61abc599f31f 6 void setAll(uint32_t *buffer, int n)
rhodes42 2:61abc599f31f 7 {
rhodes42 2:61abc599f31f 8 int i;
rhodes42 2:61abc599f31f 9 for (i = 0; i < n; i++)
rhodes42 2:61abc599f31f 10 {
rhodes42 2:61abc599f31f 11 tapeSet(i, buffer[i]);
rhodes42 2:61abc599f31f 12 }
rhodes42 2:61abc599f31f 13 }
rhodes42 2:61abc599f31f 14
rhodes42 2:61abc599f31f 15 void setAllOneColor(uint32_t color, int n)
rhodes42 2:61abc599f31f 16 {
rhodes42 2:61abc599f31f 17 int i;
rhodes42 2:61abc599f31f 18 for (i = 0; i < n; i++)
rhodes42 2:61abc599f31f 19 {
rhodes42 2:61abc599f31f 20 tapeSet(i, color);
rhodes42 2:61abc599f31f 21 }
rhodes42 2:61abc599f31f 22 }
rhodes42 2:61abc599f31f 23
rhodes42 2:61abc599f31f 24 void shiftAllFwd(uint32_t *buffer, int n)
rhodes42 2:61abc599f31f 25 {
rhodes42 2:61abc599f31f 26 int i;
rhodes42 2:61abc599f31f 27 uint32_t temp = buffer[n];
rhodes42 2:61abc599f31f 28 for (i = n; i > 0; i--)
rhodes42 2:61abc599f31f 29 {
rhodes42 2:61abc599f31f 30 buffer[i] = buffer[i-1];
rhodes42 2:61abc599f31f 31 }
rhodes42 2:61abc599f31f 32 buffer[0] = temp;
rhodes42 2:61abc599f31f 33 }
rhodes42 2:61abc599f31f 34
rhodes42 2:61abc599f31f 35 void shiftAllRev(uint32_t *buffer, int n)
rhodes42 2:61abc599f31f 36 {
rhodes42 2:61abc599f31f 37 int i;
rhodes42 2:61abc599f31f 38 uint32_t temp = buffer[0];
rhodes42 2:61abc599f31f 39 for (i = 0; i <= n-1; i++)
rhodes42 2:61abc599f31f 40 {
rhodes42 2:61abc599f31f 41 buffer[i] = buffer[i+1];
rhodes42 2:61abc599f31f 42 }
rhodes42 2:61abc599f31f 43 buffer[n] = temp;
rhodes42 2:61abc599f31f 44 }
rhodes42 2:61abc599f31f 45
rhodes42 2:61abc599f31f 46
rhodes42 2:61abc599f31f 47 void setEveryMod(uint32_t * buffer, uint32_t color, int mod, int start, int n)
rhodes42 2:61abc599f31f 48 {
rhodes42 2:61abc599f31f 49 int i;
rhodes42 2:61abc599f31f 50 for (i = 0; i < n; i ++)
rhodes42 2:61abc599f31f 51 {
rhodes42 2:61abc599f31f 52 if ((i >= start) && ((i - start) % mod == 0)) buffer[i] = color;
rhodes42 2:61abc599f31f 53 }
rhodes42 3:743570d993aa 54 }
rhodes42 3:743570d993aa 55
rhodes42 3:743570d993aa 56
rhodes42 3:743570d993aa 57 void scaleBrightness(uint32_t *buffer, int divider, int n)
rhodes42 3:743570d993aa 58 {
rhodes42 3:743570d993aa 59 int i, r, g, b;
rhodes42 3:743570d993aa 60 for (i = 0; i < n; i++)
rhodes42 3:743570d993aa 61 {
rhodes42 3:743570d993aa 62 r = (buffer[i] >> 16) & 0xff;
rhodes42 3:743570d993aa 63 g = (buffer[i] >> 8 ) & 0xff;
rhodes42 3:743570d993aa 64 b = (buffer[i] ) & 0xff;
rhodes42 3:743570d993aa 65 r /= divider;
rhodes42 3:743570d993aa 66 g /= divider;
rhodes42 3:743570d993aa 67 b /= divider;
rhodes42 3:743570d993aa 68 buffer[i] = (r << 16) | (g << 8) | (b);
rhodes42 3:743570d993aa 69 }
rhodes42 3:743570d993aa 70 }
rhodes42 3:743570d993aa 71
rhodes42 3:743570d993aa 72 void setPixelRGB(int pixel, int r, int g, int b)
rhodes42 3:743570d993aa 73 {
rhodes42 3:743570d993aa 74
rhodes42 3:743570d993aa 75 int pix = (r << 16) | (g << 8) | (b);
rhodes42 3:743570d993aa 76 tapeSet(pixel, pix);
rhodes42 2:61abc599f31f 77 }