Rob Dobson
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: Idler.cpp
- Revision:
- 5:910909f34907
- Child:
- 6:8df79fe1afcd
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Idler.cpp Tue Sep 01 15:53:52 2015 +0000
@@ -0,0 +1,49 @@
+
+#include "Idler.h"
+
+DigitalOut* Idler::_pStatusLed = NULL;
+bool Idler::_isIdle = true;
+unsigned int Idler::_stepCount = 0;
+DrawingManager* Idler::_pDrawingManager = NULL;
+Ticker Idler::_idleTicker;
+Timer Idler::_idleTimer;
+
+const int IDLE_TIMEOUT = 10; // N seconds of no REST commands -> idle
+
+Idler::Idler(DigitalOut* pStatusLed, DrawingManager* pDrawingManager)
+{
+ _pStatusLed = pStatusLed;
+ _pDrawingManager = pDrawingManager;
+ _idleTicker.attach(&tick, 0.1);
+}
+
+void Idler::tick()
+{
+ // Check if idle
+ if (!_isIdle)
+ {
+ // Check time since last notIdle
+ if (_idleTimer.read() < IDLE_TIMEOUT)
+ return;
+
+ // Now idle again
+ _idleTimer.stop();
+ _isIdle = true;
+ }
+
+ // Blink LED
+ *_pStatusLed = !(*_pStatusLed);
+
+ // Step through display
+ _pDrawingManager->DisplayIdle(_stepCount);
+ _stepCount++;
+}
+
+void Idler::notIdle()
+{
+ _isIdle = false;
+ *_pStatusLed = false;
+ _idleTimer.reset();
+ _idleTimer.start();
+ _stepCount = 0;
+}