--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/service/arduinoNode/write_arduino_code.py	Thu Jan 28 00:21:31 2016 -0800
@@ -0,0 +1,118 @@
+import tempfile, subprocess, logging, os
+log = logging.getLogger('arduino_code')
+
+def writeMakefile(dev, tag, allLibs):
+    return '''
+BOARD_TAG = %(tag)s
+USER_LIB_PATH := %(libs)s
+ARDUINO_LIBS = %(arduinoLibs)s
+MONITOR_PORT = %(dev)s
+
+include /usr/share/arduino/Arduino.mk
+            ''' % {
+                'dev': dev,
+                'tag': tag,
+                'libs': os.path.abspath('arduino-libraries'),
+                'arduinoLibs': ' '.join(allLibs),
+               }
+
+def writeCode(baudrate, devs, devCommandNum):
+    generated = {
+        'baudrate': baudrate,
+        'includes': '',
+        'global': '',
+        'setups': '',
+        'polls': '',
+        'idles': '',
+        'actions': '',            
+    }
+    for attr in ['includes', 'global', 'setups', 'polls', 'idles',
+                 'actions']:
+        for dev in devs:
+            if attr == 'includes':
+                gen = '\n'.join('#include "%s"\n' % inc
+                                for inc in dev.generateIncludes())
+            elif attr == 'global': gen = dev.generateGlobalCode()
+            elif attr == 'setups': gen = dev.generateSetupCode()
+            elif attr == 'polls': gen = dev.generatePollCode()
+            elif attr == 'idles': gen = dev.generateIdleCode()
+            elif attr == 'actions':
+                code = dev.generateActionCode()
+                if code:
+                    gen = '''else if (cmd == %(cmdNum)s) {
+                               %(code)s
+                               Serial.write('k');
+                             }
+                          ''' % dict(cmdNum=devCommandNum[dev.uri],
+                                     code=code)
+                else:
+                    gen = ''
+            else:
+                raise NotImplementedError
+
+            if gen:
+                generated[attr] += '// for %s\n%s\n' % (dev.uri, gen.strip())
+
+    code = '''
+%(includes)s
+
+%(global)s
+byte frame=1;
+unsigned long lastFrame=0; 
+
+void setup() {
+    Serial.begin(%(baudrate)d);
+    Serial.flush();
+    %(setups)s
+}
+        
+void idle() {
+    // this slowdown is to spend somewhat less time PWMing, to reduce
+    // leaking from on channels to off ones (my shift register has no
+    // latching)
+    if (micros() < lastFrame + 80) {
+      return;
+    }
+    lastFrame = micros();
+    frame++;
+    %(idles)s
+}
+
+void loop() {
+    byte head, cmd;
+    idle();
+    if (Serial.available() >= 2) {
+        head = Serial.read();
+        if (head != 0x60) {
+            Serial.flush();
+            return;
+        }
+        cmd = Serial.read();
+        if (cmd == 0x00) { // poll
+          %(polls)s
+          Serial.write('x');
+        } else if (cmd == 0x01) { // get code checksum
+          Serial.write("CODE_CHECKSUM");
+        }
+        %(actions)s
+    }
+}
+        ''' % generated
+    return code
+
+def indent(code):
+    try:
+        with tempfile.SpooledTemporaryFile() as codeFile:
+            codeFile.write(code)
+            codeFile.seek(0)
+            code = subprocess.check_output([
+                'indent',
+                '-linux',
+                '-fc1', # ok to indent comments
+                '-i4', # 4-space indent
+                '-sob' # swallow blanks (not working)
+            ], stdin=codeFile)
+    except OSError as e:
+        log.warn("indent failed (%r)", e)
+    return code
+