Rob Dobson / Mbed 2 deprecated SpideyWallWeb

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/ /media/uploads/Bobty/20130722_112945_img_9674_62895-1184x1579.jpg

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/

Idler.cpp@6:8df79fe1afcd, 2015-09-03 (annotated)

Committer:
Bobty
Date:
Thu Sep 03 20:17:23 2015 +0000
Revision:
6:8df79fe1afcd
Parent:
5:910909f34907 
Fixed an unforeseen problem with messages not aligned on RGB boundaries; Fixed potential hanging pointer problem in colourconverters; Changed Idle screen to a set of colourful snakes

Who changed what in which revision?

UserRevisionLine numberNew contents of line
Bobty 5:910909f34907 1
Bobty 5:910909f34907 2 #include "Idler.h"
Bobty 5:910909f34907 3
Bobty 5:910909f34907 4 DigitalOut* Idler::_pStatusLed = NULL;
Bobty 6:8df79fe1afcd 5 bool Idler::_isRunning = false;
Bobty 5:910909f34907 6 bool Idler::_isIdle = true;
Bobty 5:910909f34907 7 unsigned int Idler::_stepCount = 0;
Bobty 5:910909f34907 8 DrawingManager* Idler::_pDrawingManager = NULL;
Bobty 5:910909f34907 9 Ticker Idler::_idleTicker;
Bobty 5:910909f34907 10 Timer Idler::_idleTimer;
Bobty 5:910909f34907 11
Bobty 5:910909f34907 12 const int IDLE_TIMEOUT = 10; // N seconds of no REST commands -> idle
Bobty 5:910909f34907 13
Bobty 5:910909f34907 14 Idler::Idler(DigitalOut* pStatusLed, DrawingManager* pDrawingManager)
Bobty 5:910909f34907 15 {
Bobty 5:910909f34907 16 _pStatusLed = pStatusLed;
Bobty 5:910909f34907 17 _pDrawingManager = pDrawingManager;
Bobty 5:910909f34907 18 _idleTicker.attach(&tick, 0.1);
Bobty 5:910909f34907 19 }
Bobty 5:910909f34907 20
Bobty 6:8df79fe1afcd 21 void Idler::start()
Bobty 6:8df79fe1afcd 22 {
Bobty 6:8df79fe1afcd 23 _isRunning = true;
Bobty 6:8df79fe1afcd 24 }
Bobty 6:8df79fe1afcd 25
Bobty 5:910909f34907 26 void Idler::tick()
Bobty 5:910909f34907 27 {
Bobty 6:8df79fe1afcd 28 // Check if we are running
Bobty 6:8df79fe1afcd 29 if (!_isRunning)
Bobty 6:8df79fe1afcd 30 return;
Bobty 6:8df79fe1afcd 31
Bobty 5:910909f34907 32 // Check if idle
Bobty 5:910909f34907 33 if (!_isIdle)
Bobty 5:910909f34907 34 {
Bobty 5:910909f34907 35 // Check time since last notIdle
Bobty 5:910909f34907 36 if (_idleTimer.read() < IDLE_TIMEOUT)
Bobty 5:910909f34907 37 return;
Bobty 5:910909f34907 38
Bobty 5:910909f34907 39 // Now idle again
Bobty 5:910909f34907 40 _idleTimer.stop();
Bobty 5:910909f34907 41 _isIdle = true;
Bobty 5:910909f34907 42 }
Bobty 5:910909f34907 43
Bobty 5:910909f34907 44 // Blink LED
Bobty 5:910909f34907 45 *_pStatusLed = !(*_pStatusLed);
Bobty 5:910909f34907 46
Bobty 5:910909f34907 47 // Step through display
Bobty 5:910909f34907 48 _pDrawingManager->DisplayIdle(_stepCount);
Bobty 5:910909f34907 49 _stepCount++;
Bobty 5:910909f34907 50 }
Bobty 5:910909f34907 51
Bobty 5:910909f34907 52 void Idler::notIdle()
Bobty 5:910909f34907 53 {
Bobty 5:910909f34907 54 _isIdle = false;
Bobty 5:910909f34907 55 *_pStatusLed = false;
Bobty 5:910909f34907 56 _idleTimer.reset();
Bobty 5:910909f34907 57 _idleTimer.start();
Bobty 5:910909f34907 58 _stepCount = 0;
Bobty 5:910909f34907 59 }