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Diffstat (limited to 'Webduino/examples/Web_Buzzer/Web_Buzzer.ino')
-rw-r--r-- | Webduino/examples/Web_Buzzer/Web_Buzzer.ino | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/Webduino/examples/Web_Buzzer/Web_Buzzer.ino b/Webduino/examples/Web_Buzzer/Web_Buzzer.ino new file mode 100644 index 0000000..083f315 --- /dev/null +++ b/Webduino/examples/Web_Buzzer/Web_Buzzer.ino @@ -0,0 +1,123 @@ +/* Web_Buzzer.pde - example sketch for Webduino library */ + +#include "SPI.h" +#include "Ethernet.h" +#include "WebServer.h" + +/* CHANGE THIS TO YOUR OWN UNIQUE VALUE. The MAC number should be + * different from any other devices on your network or you'll have + * problems receiving packets. */ +static uint8_t mac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED }; + +/* CHANGE THIS TO MATCH YOUR HOST NETWORK. Most home networks are in + * the 192.168.0.XXX or 192.168.1.XXX subrange. Pick an address + * that's not in use and isn't going to be automatically allocated by + * DHCP from your router. */ +static uint8_t ip[] = { 192, 168, 1, 210 }; + +/* 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 *url_tail, bool tail_complete) +{ + 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) = + "<html><head><title>Webduino Buzzer Example</title>" + "<body>" + "<h1>Test the Buzzer!</h1>" + "<form action='/buzz' method='POST'>" + "<p><button name='buzz' value='0'>Turn if Off!</button></p>" + "<p><button name='buzz' value='500'>500</button></p>" + "<p><button name='buzz' value='1975'>1975</button></p>" + "<p><button name='buzz' value='3000'>3000</button></p>" + "<p><button name='buzz' value='8000'>8000</button></p>" + "</form></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); + } +} |