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/

DrawingManager.cpp

Committer:
Bobty
Date:
2015-09-01
Revision:
5:910909f34907
Parent:
4:b521815f2657
Child:
6:8df79fe1afcd

File content as of revision 5:910909f34907:

//
// Drawing Manager for LightWall
// Rob Dobson 2015
//

#include "DrawingManager.h"
#include "rtos.h"
#include "colourconverters.h"

DrawingManager::DrawingManager()
{
    pLedStrip = NULL;
    isBusy = false;
}

void DrawingManager::Init(int numLeds, int splitPoint)
{
    pLedStrip = new ledstrip(numLeds, splitPoint);
    Thread::wait(100);
    pLedStrip->Clear();
    pLedStrip->ShowLeds();
    
}

void DrawingManager::Clear()
{
//    printf("CLEAR\r\n");
    if (pLedStrip)
        pLedStrip->Clear();
}

void DrawingManager::RawFill(char* args, unsigned char* payload, int payloadLen, int payloadOffset)
{
//    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::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();
}

void DrawingManager::DisplayIdle(unsigned int stepCount)
{
    // Display a step in an auto sequence
    if (!pLedStrip)
        return;
    if (pLedStrip->IsBusy())
        return;
    pLedStrip->Clear();
    int ledsPerGroup = pLedStrip->GetNumLeds() / 10;
    for (int i = 0; i < pLedStrip->GetNumLeds(); i += ledsPerGroup)
    {
        RgbColor colrVal((stepCount * 7) + (i * 23) % 64, (stepCount * 17) + 77 + (i * 3) % 64, (stepCount * 37) + 117 + (i * 13) % 64);
        RgbColor colrVal2((stepCount * 17) + (i * 33) % 64, (stepCount * 3) + 13 + (i * 13) % 64, (stepCount * 77) + 11 + (i * 23) % 64);
        pLedStrip->Fill(i,ledsPerGroup,colrVal.r, colrVal.g, colrVal.b, colrVal2.r, colrVal2.g, colrVal2.b);
    }
    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;
}