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Diffstat (limited to 'Webduino/examples/Web_AjaxBuzzer')
-rw-r--r-- | Webduino/examples/Web_AjaxBuzzer/Web_AjaxBuzzer.ino | 126 |
1 files changed, 126 insertions, 0 deletions
diff --git a/Webduino/examples/Web_AjaxBuzzer/Web_AjaxBuzzer.ino b/Webduino/examples/Web_AjaxBuzzer/Web_AjaxBuzzer.ino new file mode 100644 index 0000000..e546030 --- /dev/null +++ b/Webduino/examples/Web_AjaxBuzzer/Web_AjaxBuzzer.ino @@ -0,0 +1,126 @@ +/* Web_Buzzer.pde - example sketch for Webduino library */ + +#include "SPI.h" +#include "Ethernet.h" +#include "WebServer.h" + +// CHANGE THIS TO YOUR OWN UNIQUE VALUE +static uint8_t mac[6] = { 0x02, 0xAA, 0xBB, 0xCC, 0x00, 0x22 }; + +// CHANGE THIS TO MATCH YOUR HOST NETWORK +static uint8_t ip[4] = { 192, 168, 1, 210 }; // area 51! + +/* all URLs on this server will start with /buzz because of how we + * define the PREFIX value. We also will listen on port 80, the + * standard HTTP service port */ +#define PREFIX "/buzz" +WebServer webserver(PREFIX, 80); + +/* the piezo speaker on the Danger Shield is on PWM output pin #3 */ +#define BUZZER_PIN 3 + +/* this is the number of microseconds to wait after turning the + * speaker on before turning it off. */ +int buzzDelay = 0; + +/* toggle is used to only turn on the speaker every other loop +iteration. */ +char toggle = 0; + +/* This command is set as the default command for the server. It + * handles both GET and POST requests. For a GET, it returns a simple + * page with some buttons. For a POST, it saves the value posted to + * the buzzDelay variable, affecting the output of the speaker */ +void buzzCmd(WebServer &server, WebServer::ConnectionType type, char *, bool) +{ + if (type == WebServer::POST) + { + bool repeat; + char name[16], value[16]; + do + { + /* readPOSTparam returns false when there are no more parameters + * to read from the input. We pass in buffers for it to store + * the name and value strings along with the length of those + * buffers. */ + repeat = server.readPOSTparam(name, 16, value, 16); + + /* this is a standard string comparison function. It returns 0 + * when there's an exact match. We're looking for a parameter + * named "buzz" here. */ + if (strcmp(name, "buzz") == 0) + { + /* use the STRing TO Unsigned Long function to turn the string + * version of the delay number into our integer buzzDelay + * variable */ + buzzDelay = strtoul(value, NULL, 10); + } + } while (repeat); + + // after procesing the POST data, tell the web browser to reload + // the page using a GET method. + server.httpSeeOther(PREFIX); + return; + } + + /* for a GET or HEAD, send the standard "it's all OK headers" */ + server.httpSuccess(); + + /* we don't output the body for a HEAD request */ + if (type == WebServer::GET) + { + /* store the HTML in program memory using the P macro */ + P(message) = +"<!DOCTYPE html><html><head>" + "<title>Webduino AJAX Buzzer Example</title>" + "<link href='http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/themes/base/jquery-ui.css' rel=stylesheet />" + //"<meta http-equiv='Content-Script-Type' content='text/javascript'>" + "<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.6.4/jquery.min.js'></script>" + "<script src='http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.16/jquery-ui.min.js'></script>" + "<style> #slider { margin: 10px; } </style>" + "<script>" + "function changeBuzz(event, ui) { $('#indicator').text(ui.value); $.post('/buzz', { buzz: ui.value } ); }" + "$(document).ready(function(){ $('#slider').slider({min: 0, max:8000, change:changeBuzz}); });" + "</script>" +"</head>" +"<body style='font-size:62.5%;'>" + "<h1>Test the Buzzer!</h1>" + "<div id=slider></div>" + "<p id=indicator>0</p>" +"</body>" +"</html>"; + + server.printP(message); + } +} + +void setup() +{ + // set the PWM output for the buzzer to out + pinMode(BUZZER_PIN, OUTPUT); + + // setup the Ehternet library to talk to the Wiznet board + Ethernet.begin(mac, ip); + + /* register our default command (activated with the request of + * http://x.x.x.x/buzz */ + webserver.setDefaultCommand(&buzzCmd); + + /* start the server to wait for connections */ + webserver.begin(); +} + +void loop() +{ + // process incoming connections one at a time forever + webserver.processConnection(); + + /* every other time through the loop, turn on and off the speaker if + * our delay isn't set to 0. */ + if ((++toggle & 1) && (buzzDelay > 0)) + { + digitalWrite(BUZZER_PIN, HIGH); + delayMicroseconds(buzzDelay); + digitalWrite(BUZZER_PIN, LOW); + } +} |