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: DrawingManager.cpp
- Revision:
- 4:b521815f2657
- Parent:
- 3:e5ea80fae61d
- Child:
- 5:910909f34907
--- a/DrawingManager.cpp Mon Aug 31 09:03:15 2015 +0000
+++ b/DrawingManager.cpp Mon Aug 31 15:21:47 2015 +0000
@@ -1,5 +1,5 @@
//
-// Drawing Manager for Pancake Drawbot
+// Drawing Manager for LightWall
// Rob Dobson 2015
//
@@ -12,7 +12,7 @@
isBusy = false;
}
-void DrawingManager::init(int numLeds, int splitPoint)
+void DrawingManager::Init(int numLeds, int splitPoint)
{
pLedStrip = new ledstrip(numLeds, splitPoint);
Thread::wait(100);
@@ -21,18 +21,58 @@
}
-char* DrawingManager::start(const unsigned char* cmdBuf, int cmdLen)
+void DrawingManager::Clear()
+{
+// printf("CLEAR\r\n");
+ if (pLedStrip)
+ pLedStrip->Clear();
+}
+
+void DrawingManager::RawFill(char* args, unsigned char* payload, int payloadLen, int payloadOffset)
{
- if (!pLedStrip)
- return "NOINIT";
- if (isBusy)
- return "BUSY";
- isBusy = true;
- char* respStr = cmdmsg::Interpret(cmdBuf, cmdLen, pLedStrip);
- isBusy = false;
- return respStr;
+// printf("RAWFILL %s payloadLen %d, payloadOffset %d\r\n", args, payloadLen, payloadOffset);
+ int startLed = GetIntFromNameValPair(args, "start=", -1);
+ if (startLed != -1 && payloadLen > 0)
+ {
+ int numLeds = payloadLen / 3;
+ int fromLed = startLed + (payloadOffset / 3);
+// printf("RAWFILL fromLed %d numLeds %d\r\n", fromLed, numLeds);
+ pLedStrip->RawFill(fromLed, numLeds, payload);
+ }
}
-void DrawingManager::service()
+void DrawingManager::Fill(char* args)
{
+// printf("FILL %s\r\n", args);
+ int startLed = GetIntFromNameValPair(args, "start=", -1);
+ int numLeds = GetIntFromNameValPair(args, "len=", -1);
+ int r1 = GetIntFromNameValPair(args, "r1=", -1);
+ int g1 = GetIntFromNameValPair(args, "g1=", -1);
+ int b1 = GetIntFromNameValPair(args, "b1=", -1);
+ int r2 = GetIntFromNameValPair(args, "r2=", -1);
+ int g2 = GetIntFromNameValPair(args, "g2=", -1);
+ int b2 = GetIntFromNameValPair(args, "b2=", -1);
+ if (startLed != -1 && numLeds != -1 && r1 != -1 && g1 != -1 && b1 != -1)
+ {
+ if (r2 == -1 || g2 == -1 || b2 == -1)
+ pLedStrip->Fill(startLed, numLeds, r1, g1, b1);
+ else
+ pLedStrip->Fill(startLed, numLeds, r1, g1, b1, r2, g2, b2);
+ }
}
+
+void DrawingManager::ShowLeds()
+{
+// printf("SHOWLEDS\r\n");
+ if (pLedStrip)
+ pLedStrip->ShowLeds();
+}
+
+int DrawingManager::GetIntFromNameValPair(char* buf, char* name, int invalidVal)
+{
+ int val = invalidVal;
+ char* pFnd = strstr(buf, name);
+ if (pFnd)
+ val = atoi(pFnd + strlen(name));
+ return val;
+}