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: main.cpp
- Revision:
- 5:910909f34907
- Parent:
- 4:b521815f2657
- Child:
- 6:8df79fe1afcd
--- a/main.cpp Mon Aug 31 15:21:47 2015 +0000
+++ b/main.cpp Tue Sep 01 15:53:52 2015 +0000
@@ -10,6 +10,7 @@
#include "EthernetInterface.h"
#include "RdWebServer.h"
#include "DrawingManager.h"
+#include "Idler.h"
#include <string.h>
// Web port
@@ -30,6 +31,9 @@
// Drawing Manager
DrawingManager drawingManager;
+// Idler - to display something when not being driven by the web interface
+Idler idler(&led2, &drawingManager);
+
// General response string for REST requests
char* generalRespStr = "HTTP/1.1 200 OK\r\nConnection: keep-alive\r\nAccess-Control-Allow-Origin: *\r\nAccess-Control-Allow-Methods: POST, GET, OPTIONS\r\nAccess-Control-Allow-Headers:accept, content-type\r\nContent-Length: 0\r\nContent-Type: application/octet-stream\r\n\r\n";
@@ -45,6 +49,7 @@
char* lightwallClear(int method, char*cmdStr, char* argStr, char* msgBuffer, int msgLen,
int contentLen, unsigned char* pPayload, int payloadLen, int splitPayloadPos)
{
+ idler.notIdle();
drawingManager.Clear();
return generalRespStr;
}
@@ -54,6 +59,7 @@
char* lightwallRawFill(int method, char*cmdStr, char* argStr, char* msgBuffer, int msgLen,
int contentLen, unsigned char* pPayload, int payloadLen, int splitPayloadPos)
{
+ idler.notIdle();
drawingManager.RawFill(argStr, pPayload, payloadLen, splitPayloadPos);
return generalRespStr;
}
@@ -64,6 +70,7 @@
char* lightwallFill(int method, char*cmdStr, char* argStr, char* msgBuffer, int msgLen,
int contentLen, unsigned char* pPayload, int payloadLen, int splitPayloadPos)
{
+ idler.notIdle();
drawingManager.Fill(argStr);
return generalRespStr;
}
@@ -75,6 +82,7 @@
// Blink LED
led1 = !led1;
// Show LEDS
+ idler.notIdle();
drawingManager.ShowLeds();
return generalRespStr;
}
@@ -131,7 +139,7 @@
// Init
pc.baud(115200);
pc.printf("Light Wall - Rob Dobson 2015\r\n");
-
+
// Get the configuration of the system
getSystemConfig();
@@ -143,14 +151,14 @@
mbed_mac_address(macAddr);
pc.printf("Ethernet MAC address: %02x:%02x:%02x:%02x:%02x:%02x\r\n", macAddr[0], macAddr[1], macAddr[2], macAddr[3], macAddr[4], macAddr[5]);
pc.printf("Connecting to ethernet ...\r\n");
-
+
// Init ethernet
EthernetInterface::init();
// Using code described here https://developer.mbed.org/questions/1602/How-to-set-the-TCPIP-stack-s-hostname-pr/
// to setName on the ethernet interface
EthernetInterface::setName(systemName);
-
+
// Connect ethernet
EthernetInterface::connect();
pc.printf("IP Address: %s HostName %s\r\n", EthernetInterface::getIPAddress(), EthernetInterface::getName());
@@ -161,7 +169,7 @@
// This is the previous code...
// Thread httpServer(&http_server, NULL, osPriorityNormal, (DEFAULT_STACK_SIZE * 3));
http_server("");
-
+
// Forever - actually it won't even get here as the server has a forever loop in it too
while(true)
{