main.cpp

00001 /*
00002 
00003   Neopixel LED controller for mbed LPC1114 (RAMdaccha)
00004  
00005   2014/12/13 by morecat_lab
00006 
00007   This program depends on neopixel library.
00008   http://developer.mbed.org/users/JacobBramley/code/PixelArray/
00009 
00010 */
00011 #include "mbed.h"
00012 #include "neopixel.h"
00013 #include "LAMd.h"
00014 
00015 neopixel::Pixel pattern[] = {
00016     {0x55, 0, 0xff},  // magenta
00017     {0, 0, 0xff},  // blue
00018     {0xaf, 0xaf, 0xaf}, // white
00019     {0, 0xff, 0xff},  // cyan
00020     {0xaf, 0xaf, 0}, // yellow
00021     {0, 0xff, 0}, // greem
00022     {0x2f, 0, 0}, // red
00023 };
00024 
00025 #define MAX_PATTERN (sizeof pattern / sizeof (struct neopixel::Pixel))
00026 #define MAX_INDEX (MAX_PATTERN *256)
00027 #define NLED (4)
00028 #define ONE_COLOR
00029 
00030  void generate(neopixel::Pixel * out, uint32_t index, uintptr_t val) {
00031 #ifdef ONE_COLOR
00032     uint32_t pat1 = val / 256;
00033 #else
00034     uint32_t pat1 = val / 256 + index;
00035 #endif
00036     uint32_t pat2;
00037     uint32_t seq = val % 256;
00038     
00039     if (pat1 >= MAX_PATTERN) {
00040         pat1 = 0;
00041     }
00042     pat2 = pat1 + 1;
00043     if (pat2 >= MAX_PATTERN) {
00044         pat2 = 0;
00045     }
00046     out->red   = (pattern[pat1].red   * (256-seq) + pattern[pat2].red   * seq) /256;
00047     out->green = (pattern[pat1].green * (256-seq) + pattern[pat2].green * seq) /256;
00048     out->blue  = (pattern[pat1].blue  * (256-seq) + pattern[pat2].blue  * seq) /256;
00049  }
00050 
00051 
00052 int main() {
00053     DigitalIn(D3, PullDown);
00054     neopixel::PixelArray array(D3);
00055  
00056     uint32_t val = 0;
00057     while (1) {
00058       if ((++val) >= MAX_INDEX) {
00059         val = 0;
00060       }
00061       array.update(generate, NLED, val);
00062       wait_ms(10);
00063     }
00064 }