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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/
main.cpp@0:887096209439, 2015-08-18 (annotated)
- Committer:
- Bobty
- Date:
- Tue Aug 18 16:03:29 2015 +0000
- Revision:
- 0:887096209439
- Child:
- 1:362331cec9b7
Initial - unchanged since 2013
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
Bobty | 0:887096209439 | 1 | /* main.cpp |
Bobty | 0:887096209439 | 2 | Rob Dobson 2013 |
Bobty | 0:887096209439 | 3 | More details at ??? |
Bobty | 0:887096209439 | 4 | */ |
Bobty | 0:887096209439 | 5 | |
Bobty | 0:887096209439 | 6 | #include "mbed.h" |
Bobty | 0:887096209439 | 7 | #include "EthernetInterface.h" |
Bobty | 0:887096209439 | 8 | #include <stdio.h> |
Bobty | 0:887096209439 | 9 | #include <string.h> |
Bobty | 0:887096209439 | 10 | #include "RdWebServer.h" |
Bobty | 0:887096209439 | 11 | #include "ledstrip.h" |
Bobty | 0:887096209439 | 12 | #include "LedCmdHandler.h" |
Bobty | 0:887096209439 | 13 | |
Bobty | 0:887096209439 | 14 | #define PORT 80 |
Bobty | 0:887096209439 | 15 | |
Bobty | 0:887096209439 | 16 | Serial pc(USBTX, USBRX); |
Bobty | 0:887096209439 | 17 | |
Bobty | 0:887096209439 | 18 | RdWebServer webServer; |
Bobty | 0:887096209439 | 19 | |
Bobty | 0:887096209439 | 20 | EthernetInterface eth; |
Bobty | 0:887096209439 | 21 | |
Bobty | 0:887096209439 | 22 | DigitalOut led1(LED1); //server listning status |
Bobty | 0:887096209439 | 23 | DigitalOut led2(LED2); //socket connecting status |
Bobty | 0:887096209439 | 24 | |
Bobty | 0:887096209439 | 25 | Ticker ledTick; |
Bobty | 0:887096209439 | 26 | |
Bobty | 0:887096209439 | 27 | char nameOfLights[50]; |
Bobty | 0:887096209439 | 28 | int ledsCount = 904; |
Bobty | 0:887096209439 | 29 | int ledSplitPoint = 448; |
Bobty | 0:887096209439 | 30 | ledstrip* pLedStrip = NULL; |
Bobty | 0:887096209439 | 31 | |
Bobty | 0:887096209439 | 32 | char* indexHtmName = "index.htm"; |
Bobty | 0:887096209439 | 33 | |
Bobty | 0:887096209439 | 34 | const int TICK_MS = 100; |
Bobty | 0:887096209439 | 35 | LedCmdHandler* pLedCmdHandler = NULL; |
Bobty | 0:887096209439 | 36 | int blinkCtr = 0; |
Bobty | 0:887096209439 | 37 | |
Bobty | 0:887096209439 | 38 | void ledTickfunc() |
Bobty | 0:887096209439 | 39 | { |
Bobty | 0:887096209439 | 40 | if(webServer.isListening()) |
Bobty | 0:887096209439 | 41 | { |
Bobty | 0:887096209439 | 42 | blinkCtr++; |
Bobty | 0:887096209439 | 43 | if (blinkCtr > 1) |
Bobty | 0:887096209439 | 44 | { |
Bobty | 0:887096209439 | 45 | led1 = !led1; |
Bobty | 0:887096209439 | 46 | blinkCtr = 0; |
Bobty | 0:887096209439 | 47 | } |
Bobty | 0:887096209439 | 48 | } |
Bobty | 0:887096209439 | 49 | else |
Bobty | 0:887096209439 | 50 | { |
Bobty | 0:887096209439 | 51 | led1 = false; |
Bobty | 0:887096209439 | 52 | } |
Bobty | 0:887096209439 | 53 | |
Bobty | 0:887096209439 | 54 | if (pLedCmdHandler != NULL) |
Bobty | 0:887096209439 | 55 | pLedCmdHandler->NextGen(); |
Bobty | 0:887096209439 | 56 | } |
Bobty | 0:887096209439 | 57 | |
Bobty | 0:887096209439 | 58 | void handleCmd_ledControl(char* cmdStr, char* argStr) |
Bobty | 0:887096209439 | 59 | { |
Bobty | 0:887096209439 | 60 | printf("LEDS COMMAND %s %s\r\n", cmdStr, argStr); |
Bobty | 0:887096209439 | 61 | if (argStr == NULL) |
Bobty | 0:887096209439 | 62 | return; |
Bobty | 0:887096209439 | 63 | pLedCmdHandler->DoCommand(argStr); |
Bobty | 0:887096209439 | 64 | |
Bobty | 0:887096209439 | 65 | // Store last command |
Bobty | 0:887096209439 | 66 | LocalFileSystem local("local"); |
Bobty | 0:887096209439 | 67 | FILE* fp = fopen("/local/lastcmd.inf", "w"); |
Bobty | 0:887096209439 | 68 | if (fp != NULL) |
Bobty | 0:887096209439 | 69 | { |
Bobty | 0:887096209439 | 70 | fwrite(argStr, 1, strlen(argStr)+1, fp); |
Bobty | 0:887096209439 | 71 | fclose(fp); |
Bobty | 0:887096209439 | 72 | } |
Bobty | 0:887096209439 | 73 | } |
Bobty | 0:887096209439 | 74 | |
Bobty | 0:887096209439 | 75 | void reRunLastCommand() |
Bobty | 0:887096209439 | 76 | { |
Bobty | 0:887096209439 | 77 | // Store last command |
Bobty | 0:887096209439 | 78 | LocalFileSystem local("local"); |
Bobty | 0:887096209439 | 79 | FILE* fp = fopen("/local/lastcmd.inf", "r"); |
Bobty | 0:887096209439 | 80 | if (fp != NULL) |
Bobty | 0:887096209439 | 81 | { |
Bobty | 0:887096209439 | 82 | char buf[501]; |
Bobty | 0:887096209439 | 83 | buf[sizeof(buf)-1] = 0; |
Bobty | 0:887096209439 | 84 | int nread = fread(buf, 1, sizeof(buf), fp); |
Bobty | 0:887096209439 | 85 | fclose(fp); |
Bobty | 0:887096209439 | 86 | if (nread > 0 && nread <= sizeof(buf)) |
Bobty | 0:887096209439 | 87 | { |
Bobty | 0:887096209439 | 88 | buf[nread] = 0; |
Bobty | 0:887096209439 | 89 | pLedCmdHandler->DoCommand(buf); |
Bobty | 0:887096209439 | 90 | } |
Bobty | 0:887096209439 | 91 | } |
Bobty | 0:887096209439 | 92 | } |
Bobty | 0:887096209439 | 93 | |
Bobty | 0:887096209439 | 94 | #include "colourconverters.h" |
Bobty | 0:887096209439 | 95 | |
Bobty | 0:887096209439 | 96 | void BodgeSmooth(ledstrip* pLedStrip) |
Bobty | 0:887096209439 | 97 | { |
Bobty | 0:887096209439 | 98 | pLedStrip->Clear(); |
Bobty | 0:887096209439 | 99 | pLedStrip->ShowLeds(); |
Bobty | 0:887096209439 | 100 | |
Bobty | 0:887096209439 | 101 | |
Bobty | 0:887096209439 | 102 | RgbColor startRGB(50,0,0); |
Bobty | 0:887096209439 | 103 | HsvColor curHsv = RgbToHsv(startRGB); |
Bobty | 0:887096209439 | 104 | while(1) |
Bobty | 0:887096209439 | 105 | for (int k = 0; k < 1000; k++) |
Bobty | 0:887096209439 | 106 | for (int j = 0; j < 255; j++) |
Bobty | 0:887096209439 | 107 | { |
Bobty | 0:887096209439 | 108 | pLedStrip->Clear(); |
Bobty | 0:887096209439 | 109 | RgbColor colrVal = HsvToRgb(curHsv); |
Bobty | 0:887096209439 | 110 | pLedStrip->Fill(0,pLedStrip->GetNumLeds(),colrVal.r, colrVal.g, colrVal.b); |
Bobty | 0:887096209439 | 111 | pLedStrip->ShowLeds(); |
Bobty | 0:887096209439 | 112 | wait_ms(250); |
Bobty | 0:887096209439 | 113 | curHsv.h++; |
Bobty | 0:887096209439 | 114 | } |
Bobty | 0:887096209439 | 115 | } |
Bobty | 0:887096209439 | 116 | |
Bobty | 0:887096209439 | 117 | void setLightsConfig() |
Bobty | 0:887096209439 | 118 | { |
Bobty | 0:887096209439 | 119 | printf("Rob LightWall - Configured for "); |
Bobty | 0:887096209439 | 120 | // Check for a config file on the local file system |
Bobty | 0:887096209439 | 121 | strcpy(nameOfLights, "Spidey"); |
Bobty | 0:887096209439 | 122 | LocalFileSystem local("local"); |
Bobty | 0:887096209439 | 123 | FILE* fp = fopen("/local/spidey.cnf", "r"); |
Bobty | 0:887096209439 | 124 | if (fp != NULL) |
Bobty | 0:887096209439 | 125 | { |
Bobty | 0:887096209439 | 126 | char buf[201]; |
Bobty | 0:887096209439 | 127 | buf[sizeof(buf)-1] = 0; |
Bobty | 0:887096209439 | 128 | int nread = fread(buf, 1, sizeof(buf), fp); |
Bobty | 0:887096209439 | 129 | if (nread > 0 && nread <= sizeof(buf)) |
Bobty | 0:887096209439 | 130 | { |
Bobty | 0:887096209439 | 131 | buf[nread] = 0; |
Bobty | 0:887096209439 | 132 | sscanf(buf, "%s %d %d", nameOfLights, &ledsCount, &ledSplitPoint); |
Bobty | 0:887096209439 | 133 | } |
Bobty | 0:887096209439 | 134 | fclose(fp); |
Bobty | 0:887096209439 | 135 | printf("%s (%d LEDs, Split at %d)", nameOfLights, ledsCount, ledSplitPoint); |
Bobty | 0:887096209439 | 136 | printf("\n\r"); |
Bobty | 0:887096209439 | 137 | } |
Bobty | 0:887096209439 | 138 | |
Bobty | 0:887096209439 | 139 | // Leds setup |
Bobty | 0:887096209439 | 140 | pLedStrip = new ledstrip(ledsCount, ledSplitPoint); |
Bobty | 0:887096209439 | 141 | wait_ms(100); |
Bobty | 0:887096209439 | 142 | pLedStrip->Clear(); |
Bobty | 0:887096209439 | 143 | pLedStrip->ShowLeds(); |
Bobty | 0:887096209439 | 144 | |
Bobty | 0:887096209439 | 145 | // Cmd handler |
Bobty | 0:887096209439 | 146 | pLedCmdHandler = new LedCmdHandler(pLedStrip); |
Bobty | 0:887096209439 | 147 | } |
Bobty | 0:887096209439 | 148 | |
Bobty | 0:887096209439 | 149 | int main (void) |
Bobty | 0:887096209439 | 150 | { |
Bobty | 0:887096209439 | 151 | pc.baud(115200); |
Bobty | 0:887096209439 | 152 | |
Bobty | 0:887096209439 | 153 | setLightsConfig(); |
Bobty | 0:887096209439 | 154 | |
Bobty | 0:887096209439 | 155 | BodgeSmooth(pLedStrip); |
Bobty | 0:887096209439 | 156 | |
Bobty | 0:887096209439 | 157 | ledTick.attach(&ledTickfunc,TICK_MS / 1000.0); |
Bobty | 0:887096209439 | 158 | |
Bobty | 0:887096209439 | 159 | // reRunLastCommand(); |
Bobty | 0:887096209439 | 160 | |
Bobty | 0:887096209439 | 161 | // setup ethernet interface |
Bobty | 0:887096209439 | 162 | eth.init(); //Use DHCP |
Bobty | 0:887096209439 | 163 | eth.connect(); |
Bobty | 0:887096209439 | 164 | printf("IP Address is %s\n\r", eth.getIPAddress()); |
Bobty | 0:887096209439 | 165 | |
Bobty | 0:887096209439 | 166 | webServer.addCommand("", RdWebServerCmdDef::CMD_LOCALFILE, NULL, indexHtmName, true); |
Bobty | 0:887096209439 | 167 | webServer.addCommand("cmd", RdWebServerCmdDef::CMD_CALLBACK, &handleCmd_ledControl); |
Bobty | 0:887096209439 | 168 | webServer.init(PORT, &led2); |
Bobty | 0:887096209439 | 169 | webServer.run(); |
Bobty | 0:887096209439 | 170 | } |