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@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 1:362331cec9b7 1 //
Bobty 4:b521815f2657 2 // Drawing Manager for LightWall
Bobty 1:362331cec9b7 3 // Rob Dobson 2015
Bobty 1:362331cec9b7 4 //
Bobty 1:362331cec9b7 5
Bobty 1:362331cec9b7 6 #include "DrawingManager.h"
Bobty 1:362331cec9b7 7 #include "rtos.h"
Bobty 5:910909f34907 8 #include "colourconverters.h"
Bobty 1:362331cec9b7 9
Bobty 2:99eb4c6e9ea4 10 DrawingManager::DrawingManager()
Bobty 1:362331cec9b7 11 {
Bobty 2:99eb4c6e9ea4 12 pLedStrip = NULL;
Bobty 1:362331cec9b7 13 isBusy = false;
Bobty 6:8df79fe1afcd 14 rawFillPayloadOverhangBytes = 0;
Bobty 1:362331cec9b7 15 }
Bobty 1:362331cec9b7 16
Bobty 4:b521815f2657 17 void DrawingManager::Init(int numLeds, int splitPoint)
Bobty 1:362331cec9b7 18 {
Bobty 2:99eb4c6e9ea4 19 pLedStrip = new ledstrip(numLeds, splitPoint);
Bobty 2:99eb4c6e9ea4 20 Thread::wait(100);
Bobty 2:99eb4c6e9ea4 21 pLedStrip->Clear();
Bobty 2:99eb4c6e9ea4 22 pLedStrip->ShowLeds();
Bobty 2:99eb4c6e9ea4 23
Bobty 1:362331cec9b7 24 }
Bobty 1:362331cec9b7 25
Bobty 4:b521815f2657 26 void DrawingManager::Clear()
Bobty 4:b521815f2657 27 {
Bobty 4:b521815f2657 28 // printf("CLEAR\r\n");
Bobty 4:b521815f2657 29 if (pLedStrip)
Bobty 4:b521815f2657 30 pLedStrip->Clear();
Bobty 4:b521815f2657 31 }
Bobty 4:b521815f2657 32
Bobty 4:b521815f2657 33 void DrawingManager::RawFill(char* args, unsigned char* payload, int payloadLen, int payloadOffset)
Bobty 1:362331cec9b7 34 {
Bobty 4:b521815f2657 35 // printf("RAWFILL %s payloadLen %d, payloadOffset %d\r\n", args, payloadLen, payloadOffset);
Bobty 4:b521815f2657 36 int startLed = GetIntFromNameValPair(args, "start=", -1);
Bobty 4:b521815f2657 37 if (startLed != -1 && payloadLen > 0)
Bobty 4:b521815f2657 38 {
Bobty 6:8df79fe1afcd 39 // Include any overhang bytes from the last payload
Bobty 6:8df79fe1afcd 40 int numLeds = (rawFillPayloadOverhangBytes + payloadLen) / 3;
Bobty 4:b521815f2657 41 int fromLed = startLed + (payloadOffset / 3);
Bobty 6:8df79fe1afcd 42 unsigned char newPayload[numLeds*3];
Bobty 6:8df79fe1afcd 43 memcpy(newPayload, pRawFillPayloadOverhang, rawFillPayloadOverhangBytes);
Bobty 6:8df79fe1afcd 44 memcpy(newPayload+rawFillPayloadOverhangBytes, payload, numLeds*3-rawFillPayloadOverhangBytes);
Bobty 6:8df79fe1afcd 45
Bobty 6:8df79fe1afcd 46 // Send the data
Bobty 4:b521815f2657 47 // printf("RAWFILL fromLed %d numLeds %d\r\n", fromLed, numLeds);
Bobty 6:8df79fe1afcd 48 // for (int i = 0; i < numLeds*3; i+=3)
Bobty 6:8df79fe1afcd 49 // {
Bobty 6:8df79fe1afcd 50 // printf("%02x %02x %02x\r\n", newPayload[i], newPayload[i+1], newPayload[i+2]);
Bobty 6:8df79fe1afcd 51 // }
Bobty 6:8df79fe1afcd 52 pLedStrip->RawFill(fromLed, numLeds, newPayload);
Bobty 6:8df79fe1afcd 53
Bobty 6:8df79fe1afcd 54 // Save any overhanging bytes for the next fill
Bobty 6:8df79fe1afcd 55 int overhangStart = (numLeds * 3) - rawFillPayloadOverhangBytes;
Bobty 6:8df79fe1afcd 56 rawFillPayloadOverhangBytes = rawFillPayloadOverhangBytes + payloadLen - (numLeds * 3);
Bobty 6:8df79fe1afcd 57 for (int i = 0; i < rawFillPayloadOverhangBytes; i++)
Bobty 6:8df79fe1afcd 58 {
Bobty 6:8df79fe1afcd 59 pRawFillPayloadOverhang[i] = payload[overhangStart + i];
Bobty 6:8df79fe1afcd 60 }
Bobty 4:b521815f2657 61 }
Bobty 1:362331cec9b7 62 }
Bobty 1:362331cec9b7 63
Bobty 4:b521815f2657 64 void DrawingManager::Fill(char* args)
Bobty 1:362331cec9b7 65 {
Bobty 4:b521815f2657 66 // printf("FILL %s\r\n", args);
Bobty 4:b521815f2657 67 int startLed = GetIntFromNameValPair(args, "start=", -1);
Bobty 4:b521815f2657 68 int numLeds = GetIntFromNameValPair(args, "len=", -1);
Bobty 4:b521815f2657 69 int r1 = GetIntFromNameValPair(args, "r1=", -1);
Bobty 4:b521815f2657 70 int g1 = GetIntFromNameValPair(args, "g1=", -1);
Bobty 4:b521815f2657 71 int b1 = GetIntFromNameValPair(args, "b1=", -1);
Bobty 4:b521815f2657 72 int r2 = GetIntFromNameValPair(args, "r2=", -1);
Bobty 4:b521815f2657 73 int g2 = GetIntFromNameValPair(args, "g2=", -1);
Bobty 4:b521815f2657 74 int b2 = GetIntFromNameValPair(args, "b2=", -1);
Bobty 4:b521815f2657 75 if (startLed != -1 && numLeds != -1 && r1 != -1 && g1 != -1 && b1 != -1)
Bobty 4:b521815f2657 76 {
Bobty 4:b521815f2657 77 if (r2 == -1 || g2 == -1 || b2 == -1)
Bobty 4:b521815f2657 78 pLedStrip->Fill(startLed, numLeds, r1, g1, b1);
Bobty 4:b521815f2657 79 else
Bobty 4:b521815f2657 80 pLedStrip->Fill(startLed, numLeds, r1, g1, b1, r2, g2, b2);
Bobty 4:b521815f2657 81 }
Bobty 1:362331cec9b7 82 }
Bobty 4:b521815f2657 83
Bobty 4:b521815f2657 84 void DrawingManager::ShowLeds()
Bobty 4:b521815f2657 85 {
Bobty 4:b521815f2657 86 // printf("SHOWLEDS\r\n");
Bobty 6:8df79fe1afcd 87 rawFillPayloadOverhangBytes = 0;
Bobty 4:b521815f2657 88 if (pLedStrip)
Bobty 4:b521815f2657 89 pLedStrip->ShowLeds();
Bobty 4:b521815f2657 90 }
Bobty 4:b521815f2657 91
Bobty 5:910909f34907 92 void DrawingManager::DisplayIdle(unsigned int stepCount)
Bobty 5:910909f34907 93 {
Bobty 5:910909f34907 94 // Display a step in an auto sequence
Bobty 5:910909f34907 95 if (!pLedStrip)
Bobty 5:910909f34907 96 return;
Bobty 5:910909f34907 97 if (pLedStrip->IsBusy())
Bobty 5:910909f34907 98 return;
Bobty 5:910909f34907 99 pLedStrip->Clear();
Bobty 6:8df79fe1afcd 100 int numSnakes = 15;
Bobty 6:8df79fe1afcd 101 int ledsPerGroup = pLedStrip->GetNumLeds() / numSnakes;
Bobty 6:8df79fe1afcd 102 int snakeLen = 10;
Bobty 6:8df79fe1afcd 103 int snakeStep = stepCount % ledsPerGroup;
Bobty 6:8df79fe1afcd 104 int colrBase = (stepCount / ledsPerGroup);
Bobty 6:8df79fe1afcd 105 // Create a set of colourful snakes that roam around the wall
Bobty 6:8df79fe1afcd 106 for (int i = 0; i < numSnakes; i ++)
Bobty 5:910909f34907 107 {
Bobty 6:8df79fe1afcd 108 HsvColor hsv1(((colrBase + i) * 237) % 255, 128, 10);
Bobty 6:8df79fe1afcd 109 RgbColor rgb1(0,0,0);
Bobty 6:8df79fe1afcd 110 HsvToRgb(hsv1, rgb1);
Bobty 6:8df79fe1afcd 111 HsvColor hsv2(((colrBase + i + 27) * 13) % 255, 255, 255);
Bobty 6:8df79fe1afcd 112 RgbColor rgb2(0,0,0);
Bobty 6:8df79fe1afcd 113 HsvToRgb(hsv2, rgb2);
Bobty 6:8df79fe1afcd 114 pLedStrip->Fill((i*ledsPerGroup)+snakeStep,snakeLen/2, rgb1.r, rgb1.g, rgb1.b, rgb2.r, rgb2.g, rgb2.b);
Bobty 6:8df79fe1afcd 115 pLedStrip->Fill((i*ledsPerGroup)+snakeStep+snakeLen/2, snakeLen/2, rgb2.r, rgb2.g, rgb2.b, rgb1.r, rgb1.g, rgb1.b);
Bobty 5:910909f34907 116 }
Bobty 5:910909f34907 117 pLedStrip->ShowLeds();
Bobty 5:910909f34907 118 }
Bobty 5:910909f34907 119
Bobty 4:b521815f2657 120 int DrawingManager::GetIntFromNameValPair(char* buf, char* name, int invalidVal)
Bobty 4:b521815f2657 121 {
Bobty 4:b521815f2657 122 int val = invalidVal;
Bobty 4:b521815f2657 123 char* pFnd = strstr(buf, name);
Bobty 4:b521815f2657 124 if (pFnd)
Bobty 4:b521815f2657 125 val = atoi(pFnd + strlen(name));
Bobty 4:b521815f2657 126 return val;
Bobty 4:b521815f2657 127 }
Bobty 5:910909f34907 128