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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/
DrawingManager.cpp
- Committer:
- Bobty
- Date:
- 2015-09-03
- Revision:
- 6:8df79fe1afcd
- Parent:
- 5:910909f34907
File content as of revision 6:8df79fe1afcd:
// // Drawing Manager for LightWall // Rob Dobson 2015 // #include "DrawingManager.h" #include "rtos.h" #include "colourconverters.h" DrawingManager::DrawingManager() { pLedStrip = NULL; isBusy = false; rawFillPayloadOverhangBytes = 0; } 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) { // Include any overhang bytes from the last payload int numLeds = (rawFillPayloadOverhangBytes + payloadLen) / 3; int fromLed = startLed + (payloadOffset / 3); unsigned char newPayload[numLeds*3]; memcpy(newPayload, pRawFillPayloadOverhang, rawFillPayloadOverhangBytes); memcpy(newPayload+rawFillPayloadOverhangBytes, payload, numLeds*3-rawFillPayloadOverhangBytes); // Send the data // printf("RAWFILL fromLed %d numLeds %d\r\n", fromLed, numLeds); // for (int i = 0; i < numLeds*3; i+=3) // { // printf("%02x %02x %02x\r\n", newPayload[i], newPayload[i+1], newPayload[i+2]); // } pLedStrip->RawFill(fromLed, numLeds, newPayload); // Save any overhanging bytes for the next fill int overhangStart = (numLeds * 3) - rawFillPayloadOverhangBytes; rawFillPayloadOverhangBytes = rawFillPayloadOverhangBytes + payloadLen - (numLeds * 3); for (int i = 0; i < rawFillPayloadOverhangBytes; i++) { pRawFillPayloadOverhang[i] = payload[overhangStart + i]; } } } 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"); rawFillPayloadOverhangBytes = 0; 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 numSnakes = 15; int ledsPerGroup = pLedStrip->GetNumLeds() / numSnakes; int snakeLen = 10; int snakeStep = stepCount % ledsPerGroup; int colrBase = (stepCount / ledsPerGroup); // Create a set of colourful snakes that roam around the wall for (int i = 0; i < numSnakes; i ++) { HsvColor hsv1(((colrBase + i) * 237) % 255, 128, 10); RgbColor rgb1(0,0,0); HsvToRgb(hsv1, rgb1); HsvColor hsv2(((colrBase + i + 27) * 13) % 255, 255, 255); RgbColor rgb2(0,0,0); HsvToRgb(hsv2, rgb2); pLedStrip->Fill((i*ledsPerGroup)+snakeStep,snakeLen/2, rgb1.r, rgb1.g, rgb1.b, rgb2.r, rgb2.g, rgb2.b); pLedStrip->Fill((i*ledsPerGroup)+snakeStep+snakeLen/2, snakeLen/2, rgb2.r, rgb2.g, rgb2.b, rgb1.r, rgb1.g, rgb1.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; }