![](/media/cache/img/default_profile.jpg.50x50_q85.jpg)
Spidey Wall is the name for a physical wall lit up by multiple addressable LED strips. This program is an LPC1768 web server to control the wall from a browser.
Dependencies: EthernetInterfacePlusHostname RdWebServer mbed-rtos mbed
This project is part of a Light-Wall using addressable LED strips (WS2801). I have published a few posts on my blog about the construction of the wall and building a game to play on it (PacMan). I have also had a guest post from a friend who has set his children the task of producing some interesting animations. The original post is http://robdobson.com/2015/07/spidey-wall/
So far, however, I hadn't fully connected the physical (and electronic) wall with the web-browser creations to drive it. This project is hopefully the final link. A fast and reliable web server using REST commands to drive the 1686 LEDs in the Spidey Wall from code running in a browser (say on an iPad while you are playing a game).
The approach taken here results in the ability to control the RGB values of all 1686 LEDs at a rate of 20 frames per second.
A blog post describing the whole thing is here:
http://robdobson.com/2015/08/a-reliable-mbed-webserver/
Diff: colourconverters.cpp
- Revision:
- 6:8df79fe1afcd
- Parent:
- 0:887096209439
--- a/colourconverters.cpp Tue Sep 01 15:53:52 2015 +0000 +++ b/colourconverters.cpp Thu Sep 03 20:17:23 2015 +0000 @@ -1,8 +1,7 @@ #include "colourconverters.h" -RgbColor HsvToRgb(HsvColor hsv) +void HsvToRgb(HsvColor hsv, RgbColor& rgb) { - RgbColor rgb(0,0,0); unsigned char region, remainder, p, q, t; if (hsv.s == 0) @@ -10,7 +9,7 @@ rgb.r = hsv.v; rgb.g = hsv.v; rgb.b = hsv.v; - return rgb; + return; } region = hsv.h / 43; @@ -41,13 +40,10 @@ rgb.r = hsv.v; rgb.g = p; rgb.b = q; break; } - - return rgb; } -HsvColor RgbToHsv(RgbColor rgb) +void RgbToHsv(RgbColor rgb, HsvColor& hsv) { - HsvColor hsv(0,0,0); unsigned char rgbMin, rgbMax; rgbMin = rgb.r < rgb.g ? (rgb.r < rgb.b ? rgb.r : rgb.b) : (rgb.g < rgb.b ? rgb.g : rgb.b); @@ -58,14 +54,14 @@ { hsv.h = 0; hsv.s = 0; - return hsv; + return; } hsv.s = 255 * long(rgbMax - rgbMin) / hsv.v; if (hsv.s == 0) { hsv.h = 0; - return hsv; + return; } if (rgbMax == rgb.r) @@ -74,6 +70,4 @@ hsv.h = 85 + 43 * (rgb.b - rgb.r) / (rgbMax - rgbMin); else hsv.h = 171 + 43 * (rgb.r - rgb.g) / (rgbMax - rgbMin); - - return hsv; }