Add a Twitter viewer.

marquee/Makefile

@@ -0,0 +1,29 @@
+# Your Arduino environment.
+ARD_REV = 22
+ARD_HOME = /Applications/Arduino.app/Contents/Resources/Java
+AVR_HOME = $(ARD_HOME)/hardware/tools/avr
+ARD_BIN = $(AVR_HOME)/bin
+AVRDUDE = $(ARD_BIN)/avrdude
+AVRDUDE_CONF = $(AVR_HOME)/etc/avrdude.conf
+
+# Your favorite serial monitor.
+MON_CMD = echo
+MON_SPEED = 9600
+
+# Board settings.
+BOARD = uno
+PORT = /dev/tty.usbmodem1d11
+PROGRAMMER = stk500v1
+
+# Where to find header files and libraries.
+INC_DIRS = ./inc
+LIB_DIRS = $(addprefix $(ARD_HOME)/libraries/, $(LIBS))
+LIBS = LiquidCrystal
+
+include ../Makefile.master
+
+namecard.pde: marquee.h
+
+test: test.cpp
+	cc -o $@ $^
+	./test

marquee/namecard.pde

@@ -0,0 +1,69 @@
+#include <LiquidCrystal.h>
+
+LiquidCrystal lcd(13, 2, 12, 4, 8, 7);
+
+struct Marquee {
+    int count_;
+    int next_;
+    char buffer_[20 + 1];
+    char message_[200];
+};
+
+void marquee_add_char(Marquee* m, char c) {
+    m->message_[m->next_] = c;
+    m->next_++;
+}
+
+void marquee_update(Marquee* m) {
+    for (int i = 0; i < 20; i++) {
+        char c = m->message_[(m->count_ + i) % (strlen(m->message_)+1)];
+        if (c == '\0') {
+            c = '\x14';
+        }
+        m->buffer_[i] = c;
+    }
+    m->buffer_[20] = '\0';
+
+    m->count_++;
+    if (m->count_ > strlen(m->message_)) {
+        m->count_ = 0;
+    }
+}
+
+Marquee marquee;
+
+void setup() {
+    Serial.begin(9600);
+
+    lcd.begin(20, 2);
+    lcd.setCursor(0, 0);
+
+    marquee.count_ = 0;
+    marquee.next_ = 0;
+    marquee.message_[0] = '\0';
+}
+
+void receive() {
+    while (Serial.available()) {
+        int c = Serial.read();
+        if (c == '\n') {
+            marquee_add_char(&marquee, '\0');
+            marquee.next_ = 0;
+        } else {
+            marquee_add_char(&marquee, c);
+        }
+    }
+}
+
+void loop() {
+    marquee_update(&marquee);
+
+    char* ptr = marquee.buffer_;
+    lcd.setCursor(0, 0);
+    lcd.print(ptr);
+
+    receive();
+
+    delay(200);
+}
+

twitter/client.js

@@ -0,0 +1,56 @@
+var twitter_node = require('twitter-node'),
+    serialport = require('serialport'),
+    child_process = require('child_process'),
+    q = require('q');
+
+var mecab = child_process.spawn('mecab', [ '-Oyomi' ]);
+
+function katakana(src) {
+    var result = q.defer();
+    mecab.stdout.on('data', function (data) {
+        result.resolve((''+data).replace(/\n$/, ''));
+    });
+    mecab.stdin.write(src + '\n');
+    return result.promise;
+}
+
+function hankakuShiftJIS(src) {
+    var result = q.defer();
+
+    var nkf = child_process.spawn('nkf', [
+        '-s',
+        '-Z4'
+    ]);
+    nkf.stdout.on('data', function (data) {
+        result.resolve(data);
+    });
+    nkf.stdin.write(src);
+    nkf.stdin.end();
+    return result.promise;
+}
+
+var port = new serialport.SerialPort('/dev/tty.usbmodem1d11', {
+    baudrate: 9600
+});
+
+var messages = [];
+setInterval(function () {
+    console.log(messages[0]);
+    katakana(messages[0]).then(function (s) {
+        hankakuShiftJIS(s + ' \n').then(function (bytes) {
+            port.write(bytes);
+        });
+    });
+}, 1000 * 10);
+
+var twitter = new twitter_node.TwitterNode({
+    user: process.argv[2],
+    password: process.argv[3]
+});
+twitter.addListener('tweet', function (message) {
+    messages[0] = message.text;
+});
+
+twitter.track(process.argv[4]);
+
+twitter.stream();