Yoshitaka Kuwata / Mbed 2 deprecated mbed_ws2812b

neopixel library based LED controller

Dependencies:   PixelArray mbed

This program is a controller for Christmas Tree with four ws2812 full color LED.

/media/uploads/morecat_lab/imgp0547.jpg /media/uploads/morecat_lab/imgp0560.jpg /media/uploads/morecat_lab/imgp0567.jpg

main.cpp@0:afb6ebe20c1f, 2014-12-13 (annotated)

Committer:
morecat_lab
Date:
Sat Dec 13 06:58:47 2014 +0000
Revision:
0:afb6ebe20c1f
1st release

Who changed what in which revision?

UserRevisionLine numberNew contents of line
morecat_lab 0:afb6ebe20c1f 1 /*
morecat_lab 0:afb6ebe20c1f 2
morecat_lab 0:afb6ebe20c1f 3 Neopixel LED controller for mbed LPC1114 (RAMdaccha)
morecat_lab 0:afb6ebe20c1f 4
morecat_lab 0:afb6ebe20c1f 5 2014/12/13 by morecat_lab
morecat_lab 0:afb6ebe20c1f 6
morecat_lab 0:afb6ebe20c1f 7 This program depends on neopixel library.
morecat_lab 0:afb6ebe20c1f 8 http://developer.mbed.org/users/JacobBramley/code/PixelArray/
morecat_lab 0:afb6ebe20c1f 9
morecat_lab 0:afb6ebe20c1f 10 */
morecat_lab 0:afb6ebe20c1f 11 #include "mbed.h"
morecat_lab 0:afb6ebe20c1f 12 #include "neopixel.h"
morecat_lab 0:afb6ebe20c1f 13 #include "LAMd.h"
morecat_lab 0:afb6ebe20c1f 14
morecat_lab 0:afb6ebe20c1f 15 neopixel::Pixel pattern[] = {
morecat_lab 0:afb6ebe20c1f 16 {0x55, 0, 0xff}, // magenta
morecat_lab 0:afb6ebe20c1f 17 {0, 0, 0xff}, // blue
morecat_lab 0:afb6ebe20c1f 18 {0xaf, 0xaf, 0xaf}, // white
morecat_lab 0:afb6ebe20c1f 19 {0, 0xff, 0xff}, // cyan
morecat_lab 0:afb6ebe20c1f 20 {0xaf, 0xaf, 0}, // yellow
morecat_lab 0:afb6ebe20c1f 21 {0, 0xff, 0}, // greem
morecat_lab 0:afb6ebe20c1f 22 {0x2f, 0, 0}, // red
morecat_lab 0:afb6ebe20c1f 23 };
morecat_lab 0:afb6ebe20c1f 24
morecat_lab 0:afb6ebe20c1f 25 #define MAX_PATTERN (sizeof pattern / sizeof (struct neopixel::Pixel))
morecat_lab 0:afb6ebe20c1f 26 #define MAX_INDEX (MAX_PATTERN *256)
morecat_lab 0:afb6ebe20c1f 27 #define NLED (4)
morecat_lab 0:afb6ebe20c1f 28 #define ONE_COLOR
morecat_lab 0:afb6ebe20c1f 29
morecat_lab 0:afb6ebe20c1f 30 void generate(neopixel::Pixel * out, uint32_t index, uintptr_t val) {
morecat_lab 0:afb6ebe20c1f 31 #ifdef ONE_COLOR
morecat_lab 0:afb6ebe20c1f 32 uint32_t pat1 = val / 256;
morecat_lab 0:afb6ebe20c1f 33 #else
morecat_lab 0:afb6ebe20c1f 34 uint32_t pat1 = val / 256 + index;
morecat_lab 0:afb6ebe20c1f 35 #endif
morecat_lab 0:afb6ebe20c1f 36 uint32_t pat2;
morecat_lab 0:afb6ebe20c1f 37 uint32_t seq = val % 256;
morecat_lab 0:afb6ebe20c1f 38
morecat_lab 0:afb6ebe20c1f 39 if (pat1 >= MAX_PATTERN) {
morecat_lab 0:afb6ebe20c1f 40 pat1 = 0;
morecat_lab 0:afb6ebe20c1f 41 }
morecat_lab 0:afb6ebe20c1f 42 pat2 = pat1 + 1;
morecat_lab 0:afb6ebe20c1f 43 if (pat2 >= MAX_PATTERN) {
morecat_lab 0:afb6ebe20c1f 44 pat2 = 0;
morecat_lab 0:afb6ebe20c1f 45 }
morecat_lab 0:afb6ebe20c1f 46 out->red = (pattern[pat1].red * (256-seq) + pattern[pat2].red * seq) /256;
morecat_lab 0:afb6ebe20c1f 47 out->green = (pattern[pat1].green * (256-seq) + pattern[pat2].green * seq) /256;
morecat_lab 0:afb6ebe20c1f 48 out->blue = (pattern[pat1].blue * (256-seq) + pattern[pat2].blue * seq) /256;
morecat_lab 0:afb6ebe20c1f 49 }
morecat_lab 0:afb6ebe20c1f 50
morecat_lab 0:afb6ebe20c1f 51
morecat_lab 0:afb6ebe20c1f 52 int main() {
morecat_lab 0:afb6ebe20c1f 53 DigitalIn(D3, PullDown);
morecat_lab 0:afb6ebe20c1f 54 neopixel::PixelArray array(D3);
morecat_lab 0:afb6ebe20c1f 55
morecat_lab 0:afb6ebe20c1f 56 uint32_t val = 0;
morecat_lab 0:afb6ebe20c1f 57 while (1) {
morecat_lab 0:afb6ebe20c1f 58 if ((++val) >= MAX_INDEX) {
morecat_lab 0:afb6ebe20c1f 59 val = 0;
morecat_lab 0:afb6ebe20c1f 60 }
morecat_lab 0:afb6ebe20c1f 61 array.update(generate, NLED, val);
morecat_lab 0:afb6ebe20c1f 62 wait_ms(10);
morecat_lab 0:afb6ebe20c1f 63 }
morecat_lab 0:afb6ebe20c1f 64 }