Moving firmwares into hardware.

2 files changed, 583 insertions, 0 deletions

diff --git a/firmwares/Standard_Firmata/Makefile b/firmwares/Standard_Firmata/Makefile
new file mode 100644
index 0000000..8ad2d2c
--- /dev/null
+++ b/firmwares/Standard_Firmata/Makefile
@@ -0,0 +1,260 @@
+# Arduino makefile
+#
+# This makefile allows you to build sketches from the command line
+# without the Arduino environment (or Java).
+#
+# The Arduino environment does preliminary processing on a sketch before
+# compiling it.  If you're using this makefile instead, you'll need to do
+# a few things differently:
+#
+#   - Give your program's file a .cpp extension (e.g. foo.cpp).
+#
+#   - Put this line at top of your code: #include <WProgram.h>
+#
+#   - Write prototypes for all your functions (or define them before you
+#     call them).  A prototype declares the types of parameters a
+#     function will take and what type of value it will return.  This
+#     means that you can have a call to a function before the definition
+#     of the function.  A function prototype looks like the first line of
+#     the function, with a semi-colon at the end.  For example:
+#     int digitalRead(int pin);
+#
+# Instructions for using the makefile:
+#
+#  1. Copy this file into the folder with your sketch.
+#
+#  2. Below, modify the line containing "TARGET" to refer to the name of
+#     of your program's file without an extension (e.g. TARGET = foo).
+#
+#  3. Modify the line containg "ARDUINO" to point the directory that
+#     contains the Arduino core (for normal Arduino installations, this
+#     is the lib/targets/arduino sub-directory).
+#
+#  4. Modify the line containing "PORT" to refer to the filename
+#     representing the USB or serial connection to your Arduino board
+#     (e.g. PORT = /dev/tty.USB0).  If the exact name of this file
+#     changes, you can use * as a wildcard (e.g. PORT = /dev/tty.USB*).
+#
+#  5. At the command line, change to the directory containing your
+#     program's file and the makefile.
+#
+#  6. Type "make" and press enter to compile/verify your program.
+#
+#  7. Type "make upload", reset your Arduino board, and press enter  to
+#     upload your program to the Arduino board.
+#
+# $Id: Makefile,v 1.7 2007/04/13 05:28:23 eighthave Exp $
+
+PORT = /dev/tty.usbserial-*
+TARGET = Pd_firmware
+ARDUINO = /Applications/arduino-0007
+ARDUINO_SRC = $(ARDUINO)/lib/targets/arduino
+ARDUINO_LIB_SRC = $(ARDUINO)/lib/targets/libraries
+INCLUDE = -I$(ARDUINO_SRC) -I$(ARDUINO)/tools/avr/avr/include \
+	-I$(ARDUINO)/lib/targets/libraries/EEPROM \
+	-I$(ARDUINO)/lib/targets/libraries/Firmata \
+	-I$(ARDUINO)/lib/targets/libraries
+SRC = $(ARDUINO_SRC)/pins_arduino.c $(ARDUINO_SRC)/wiring.c \
+	$(ARDUINO_SRC)/WInterrupts.c
+CXXSRC = applet/$(TARGET).cpp $(ARDUINO_SRC)/HardwareSerial.cpp \
+	$(ARDUINO_LIB_SRC)/EEPROM/EEPROM.cpp \
+	$(ARDUINO_LIB_SRC)/Firmata/Firmata.cpp \
+	$(ARDUINO_SRC)/WRandom.cpp
+MCU = atmega8
+F_CPU = 16000000
+FORMAT = ihex
+UPLOAD_RATE = 19200
+
+# Name of this Makefile (used for "make depend").
+MAKEFILE = Makefile
+
+# Debugging format.
+# Native formats for AVR-GCC's -g are stabs [default], or dwarf-2.
+# AVR (extended) COFF requires stabs, plus an avr-objcopy run.
+DEBUG = stabs
+
+OPT = s
+
+# Place -D or -U options here
+CDEFS = -DF_CPU=$(F_CPU)
+CXXDEFS = -DF_CPU=$(F_CPU)
+
+# Compiler flag to set the C Standard level.
+# c89   - "ANSI" C
+# gnu89 - c89 plus GCC extensions
+# c99   - ISO C99 standard (not yet fully implemented)
+# gnu99 - c99 plus GCC extensions
+CSTANDARD = -std=gnu99
+CDEBUG = -g$(DEBUG)
+CWARN = -Wall -Wstrict-prototypes
+CTUNING = -funsigned-char -funsigned-bitfields -fpack-struct -fshort-enums
+#CEXTRA = -Wa,-adhlns=$(<:.c=.lst)
+
+CFLAGS = $(CDEBUG) $(CDEFS) $(INCLUDE) -O$(OPT) $(CWARN) $(CSTANDARD) $(CEXTRA)
+CXXFLAGS = $(CDEFS) $(INCLUDE) -O$(OPT)
+#ASFLAGS = -Wa,-adhlns=$(<:.S=.lst),-gstabs 
+LDFLAGS = 
+
+
+# Programming support using avrdude. Settings and variables.
+AVRDUDE_PROGRAMMER = stk500
+AVRDUDE_PORT = $(PORT)
+AVRDUDE_WRITE_FLASH = -U flash:w:applet/$(TARGET).hex
+AVRDUDE_FLAGS = -F -p $(MCU) -P $(AVRDUDE_PORT) -c $(AVRDUDE_PROGRAMMER) \
+  -b $(UPLOAD_RATE) -q -V
+
+# Program settings
+CC = avr-gcc
+CXX = avr-g++
+OBJCOPY = avr-objcopy
+OBJDUMP = avr-objdump
+SIZE = avr-size
+NM = avr-nm
+AVRDUDE = avrdude
+REMOVE = rm -f
+MV = mv -f
+
+# Define all object files.
+OBJ = $(SRC:.c=.o) $(CXXSRC:.cpp=.o) $(ASRC:.S=.o)
+
+# Define all listing files.
+LST = $(ASRC:.S=.lst) $(CXXSRC:.cpp=.lst) $(SRC:.c=.lst)
+
+# Combine all necessary flags and optional flags.
+# Add target processor to flags.
+ALL_CFLAGS = -mmcu=$(MCU) -I. $(CFLAGS)
+ALL_CXXFLAGS = -mmcu=$(MCU) -I. $(CXXFLAGS)
+ALL_ASFLAGS = -mmcu=$(MCU) -I. -x assembler-with-cpp $(ASFLAGS)
+
+
+# Default target.
+all: build
+	echo 'close;' | /Applications/Pd-0.39.2-extended-RC1.app/Contents/Resources/bin/pdsend 34567 || true
+	say "press the button"
+	make upload
+
+build: applet_files elf hex
+
+applet_files:
+	test -d applet || mkdir applet
+	echo '#include "WProgram.h"' > applet/$(TARGET).cpp
+	echo '#include "avr/interrupt.h"' >> applet/$(TARGET).cpp
+	sed -n 's|^\(void .*)\).*|\1;|p' Pd_firmware.pde | grep -v 'setup()' | \
+		grep -v 'loop()' >> applet/$(TARGET).cpp
+	cat $(TARGET).pde >> applet/$(TARGET).cpp
+
+elf: applet/$(TARGET).elf
+hex: applet/$(TARGET).hex
+eep: applet/$(TARGET).eep
+lss: applet/$(TARGET).lss 
+sym: applet/$(TARGET).sym
+
+# Program the device.  
+upload: applet/$(TARGET).hex
+	$(AVRDUDE) $(AVRDUDE_FLAGS) $(AVRDUDE_WRITE_FLASH)
+
+
+
+
+# Convert ELF to COFF for use in debugging / simulating in AVR Studio or VMLAB.
+COFFCONVERT=$(OBJCOPY) --debugging \
+--change-section-address .data-0x800000 \
+--change-section-address .bss-0x800000 \
+--change-section-address .noinit-0x800000 \
+--change-section-address .eeprom-0x810000 
+
+
+coff: applet/$(TARGET).elf
+	$(COFFCONVERT) -O coff-avr applet/$(TARGET).elf applet/$(TARGET).cof
+
+
+extcoff: applet/$(TARGET).elf
+	$(COFFCONVERT) -O coff-ext-avr applet/$(TARGET).elf applet/$(TARGET).cof
+
+
+.SUFFIXES: .elf .hex .eep .lss .sym
+
+.elf.hex:
+	$(OBJCOPY) -O $(FORMAT) -R .eeprom $< $@
+
+.elf.eep:
+	-$(OBJCOPY) -j .eeprom --set-section-flags=.eeprom="alloc,load" \
+	--change-section-lma .eeprom=0 -O $(FORMAT) $< $@
+
+# Create extended listing file from ELF output file.
+.elf.lss:
+	$(OBJDUMP) -h -S $< > $@
+
+# Create a symbol table from ELF output file.
+.elf.sym:
+	$(NM) -n $< > $@
+
+
+
+# Link: create ELF output file from object files.
+applet/$(TARGET).elf: $(OBJ)
+	$(CC) $(ALL_CFLAGS) $(OBJ) --output $@ $(LDFLAGS)
+
+
+# Compile: create object files from C++ source files.
+.cpp.o:
+	$(CXX) -c $(ALL_CXXFLAGS) $< -o $@ 
+
+# Compile: create object files from C source files.
+.c.o:
+	$(CC) -c $(ALL_CFLAGS) $< -o $@ 
+
+
+# Compile: create assembler files from C source files.
+.c.s:
+	$(CC) -S $(ALL_CFLAGS) $< -o $@
+
+
+# Assemble: create object files from assembler source files.
+.S.o:
+	$(CC) -c $(ALL_ASFLAGS) $< -o $@
+
+
+
+# Target: clean project.
+clean:
+	$(REMOVE) applet/$(TARGET).hex applet/$(TARGET).eep applet/$(TARGET).cof applet/$(TARGET).elf \
+	$(TARGET).map applet/$(TARGET).sym applet/$(TARGET).lss \
+	$(OBJ) $(LST) $(SRC:.c=.s) $(SRC:.c=.d) $(CXXSRC:.cpp=.s) $(CXXSRC:.cpp=.d)
+	find $(ARDUINO)/lib/ -name '*.o' -delete
+
+depend:
+	if grep '^# DO NOT DELETE' $(MAKEFILE) >/dev/null; \
+	then \
+		sed -e '/^# DO NOT DELETE/,$$d' $(MAKEFILE) > \
+			$(MAKEFILE).$$$$ && \
+		$(MV) $(MAKEFILE).$$$$ $(MAKEFILE); \
+	fi
+	echo '# DO NOT DELETE THIS LINE -- make depend depends on it.' \
+		>> $(MAKEFILE); \
+	$(CC) -M -mmcu=$(MCU) $(CDEFS) $(INCLUDE) $(SRC) $(ASRC) >> $(MAKEFILE)
+
+.PHONY:	all build elf hex eep lss sym program coff extcoff clean depend
+
+# for emacs
+etags:
+	make etags_`uname -s`
+	etags *.pde \
+		$(ARDUINO_SRC)/*.[ch] \
+		$(ARDUINO_SRC)/*.cpp \
+		$(ARDUINO)/lib/targets/libraries/*/*.[ch] \
+		$(ARDUINO)/lib/targets/libraries/*/*.cpp \
+		$(ARDUINO)/tools/avr/avr/include/avr/*.[ch] \
+		$(ARDUINO)/tools/avr/avr/include/*.[ch]
+
+etags_Darwin:
+#	etags -a 
+
+etags_Linux:
+#	etags -a /usr/include/*.h linux/input.h /usr/include/sys/*.h
+
+etags_MINGW:
+#	etags -a /usr/include/*.h /usr/include/sys/*.h 
+
+
+
diff --git a/firmwares/Standard_Firmata/Standard_Firmata.pde b/firmwares/Standard_Firmata/Standard_Firmata.pde
new file mode 100644
index 0000000..2aa9da9
--- /dev/null
+++ b/firmwares/Standard_Firmata/Standard_Firmata.pde
@@ -0,0 +1,323 @@
+/*
+ * Copyright (C) 2006 Free Software Foundation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * See file LICENSE for further informations on licensing terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * -----------------------------------------------------------
+ * Firmata, the general purpose sensorbox firmware for Arduino
+ * -----------------------------------------------------------
+ * 
+ * Firmata turns the Arduino into a Plug-n-Play sensorbox, servo
+ * controller, and/or PWM motor/lamp controller.
+ *
+ * It was originally designed to work with the Pd object [arduino]
+ * which is included in Pd-extended.  This firmware is intended to
+ * work with any host computer software package.  It can easily be
+ * used with other programs like Max/MSP, Processing, or whatever can
+ * do serial communications.
+ *
+ * @author: Hans-Christoph Steiner <hans@at.or.at>
+ *   help with initial protocol redesign: Jamie Allen <jamie@heavyside.net>
+ *   much protocol discussion: the Arduino developers mailing list
+ *   key bugfixes: Georg Holzmann <grh@mur.at>
+ *                 Gerda Strobl <gerda.strobl@student.tugraz.at>
+ * @date: 2006-05-19
+ * @locations: STEIM, Amsterdam, Netherlands
+ *             IDMI/Polytechnic University, Brookyn, NY, USA
+ *             Electrolobby Ars Electronica, Linz, Austria
+ *
+ * See http://www.arduino.cc/playground/Interfacing/Firmata for docs
+ */
+
+/* 
+ * TODO: add pulseOut functionality for servos
+ * TODO: add software PWM for servos, etc (servo.h or pulse.h)
+ * TODO: add device type reporting (i.e. some firmwares will use the Firmata
+ *       protocol, but will only support specific devices, like ultrasound 
+ *       rangefinders or servos)
+ * TODO: use Program Control to load stored profiles from EEPROM
+ */
+
+/* cvs version: $Id: Pd_firmware.pde,v 1.32 2007/06/27 20:59:24 eighthave Exp $ */
+
+#include <EEPROM.h>
+#include <Firmata.h>
+
+/*==============================================================================
+ * GLOBAL VARIABLES
+ *============================================================================*/
+
+/* input message handling */
+byte waitForData = 0; // this flag says the next serial input will be data
+byte executeMultiByteCommand = 0; // execute this after getting multi-byte data
+byte multiByteChannel = 0; // channel data for multiByteCommands
+byte storedInputData[MAX_DATA_BYTES] = {0,0}; // multi-byte data
+/* digital pins */
+boolean reportDigitalInputs = false; // output digital inputs or not
+int digitalInputs;
+int previousDigitalInputs; // previous output to test for change
+unsigned int digitalPinStatus = 65535; // store pin status, default OUTPUT
+/* PWM/analog outputs */
+int pwmStatus = 0; // bitwise array to store PWM status
+/* analog inputs */
+int analogInputsToReport = 0; // bitwise array to store pin reporting
+int analogPin = 0; // counter for reading analog pins
+/* timer variables */
+extern volatile unsigned long timer0_overflow_count; // timer0 from wiring.c
+unsigned long nextExecuteTime; // for comparison with timer0_overflow_count
+
+/*==============================================================================
+ * FUNCTIONS                                                                
+ *============================================================================*/
+
+/* -----------------------------------------------------------------------------
+ * output digital bytes received from the serial port  */
+void outputDigitalBytes(byte pin0_6, byte pin7_13) {
+  int i;
+  int mask;
+  int twoBytesForPorts;
+    
+// this should be converted to use PORTs
+  twoBytesForPorts = pin0_6 + (pin7_13 << 7);
+  for(i=2; i<TOTAL_DIGITAL_PINS; ++i) { // ignore Rx,Tx pins (0 and 1)
+    mask = 1 << i;
+    if( (digitalPinStatus & mask) && !(pwmStatus & mask) ) {
+      digitalWrite(i, twoBytesForPorts & mask ? HIGH : LOW);
+    } 
+  }
+}
+
+/* -----------------------------------------------------------------------------
+ * check all the active digital inputs for change of state, then add any events
+ * to the Serial output queue using Serial.print() */
+void checkDigitalInputs(void) {
+  if(reportDigitalInputs) {
+	 previousDigitalInputs = digitalInputs;
+	 digitalInputs = PINB << 8;  // get pins 8-13
+	 digitalInputs += PIND;      // get pins 0-7
+	 digitalInputs = digitalInputs &~ digitalPinStatus; // ignore pins set OUTPUT
+	 if(digitalInputs != previousDigitalInputs) {
+		// TODO: implement more ports as channels for more than 16 digital pins
+		Firmata.sendDigitalPortPair(0, digitalInputs); // port 0 till more are implemented
+		/*		Serial.print(DIGITAL_MESSAGE,BYTE);
+		Serial.print(digitalInputs % 128, BYTE); // Tx pins 0-6
+		Serial.print(digitalInputs >> 7, BYTE);  // Tx pins 7-13*/
+	 }
+  }
+}
+
+// -----------------------------------------------------------------------------
+/* sets the pin mode to the correct state and sets the relevant bits in the
+ * two bit-arrays that track Digital I/O and PWM status
+ */
+void setPinMode(byte pin, byte mode) {
+  if(pin > 1) { // ignore RxTx pins (0,1)
+	if(mode == INPUT) {
+	  digitalPinStatus = digitalPinStatus &~ (1 << pin);
+	  pwmStatus = pwmStatus &~ (1 << pin);
+	  digitalWrite(pin,LOW); // turn off pin before switching to INPUT
+	  pinMode(pin,INPUT);
+	}
+	else if(mode == OUTPUT) {
+	  digitalPinStatus = digitalPinStatus | (1 << pin);
+	  pwmStatus = pwmStatus &~ (1 << pin);
+	  pinMode(pin,OUTPUT);
+	}
+	else if( mode == PWM ) {
+	  digitalPinStatus = digitalPinStatus | (1 << pin);
+	  pwmStatus = pwmStatus | (1 << pin);
+	  pinMode(pin,OUTPUT);
+	}
+  // TODO: save status to EEPROM here, if changed
+  }
+}
+
+// -----------------------------------------------------------------------------
+/* sets bits in a bit array (int) to toggle the reporting of the analogIns
+ */
+void setAnalogPinReporting(byte pin, byte state) {
+  if(state == 0) {
+    analogInputsToReport = analogInputsToReport &~ (1 << pin);
+  }
+  else { // everything but 0 enables reporting of that pin
+    analogInputsToReport = analogInputsToReport | (1 << pin);
+  }
+  // TODO: save status to EEPROM here, if changed
+}
+
+/* -----------------------------------------------------------------------------
+ * processInput() is called whenever a byte is available on the
+ * Arduino's serial port.  This is where the commands are handled. */
+void processInput(int inputData) {
+  int command;
+  
+  // a few commands have byte(s) of data following the command
+  if( (waitForData > 0) && (inputData < 128) ) {  
+    waitForData--;
+    storedInputData[waitForData] = inputData;
+    if( (waitForData==0) && executeMultiByteCommand ) { // got the whole message
+      switch(executeMultiByteCommand) {
+      case ANALOG_MESSAGE:
+		setPinMode(multiByteChannel,PWM);
+		analogWrite(multiByteChannel, 
+		(storedInputData[0] << 7) + storedInputData[1] );
+        break;
+      case DIGITAL_MESSAGE:
+		outputDigitalBytes(storedInputData[1], storedInputData[0]); //(LSB, MSB)
+		break;
+      case SET_DIGITAL_PIN_MODE:
+		setPinMode(storedInputData[1], storedInputData[0]); // (pin#, mode)
+		if(storedInputData[0] == INPUT) 
+		  reportDigitalInputs = true; // enable reporting of digital inputs
+        break;
+      case REPORT_ANALOG_PIN:
+		setAnalogPinReporting(multiByteChannel,storedInputData[0]);
+        break;
+      case REPORT_DIGITAL_PORTS:
+		// TODO: implement MIDI channel as port base for more than 16 digital inputs
+		if(storedInputData[0] == 0)
+		  reportDigitalInputs = false;
+		else
+		  reportDigitalInputs = true;
+        break;
+      }
+      executeMultiByteCommand = 0;
+    }	
+  } else {
+    // remove channel info from command byte if less than 0xF0
+    if(inputData < 0xF0) {
+      command = inputData & 0xF0;
+	  multiByteChannel = inputData & 0x0F;
+    } else {
+      command = inputData;
+	  // commands in the 0xF* range don't use channel data
+    }
+    switch (command) { // TODO: these needs to be switched to command
+    case ANALOG_MESSAGE:
+    case DIGITAL_MESSAGE:
+    case SET_DIGITAL_PIN_MODE:
+      waitForData = 2; // two data bytes needed
+      executeMultiByteCommand = command;
+      break;
+    case REPORT_ANALOG_PIN:
+    case REPORT_DIGITAL_PORTS:
+      waitForData = 1; // two data bytes needed
+      executeMultiByteCommand = command;
+      break;
+    case SYSTEM_RESET:
+      // this doesn't do anything yet
+      break;
+    case REPORT_VERSION:
+	  Firmata.printVersion();
+      break;
+    }
+  }
+}
+
+/* -----------------------------------------------------------------------------
+ * this function checks to see if there is data waiting on the serial port 
+ * then processes all of the stored data
+ */
+void checkForSerialReceive() {
+  while(Serial.available())
+	processInput(Serial.read());
+}
+
+/* -----------------------------------------------------------------------------
+ * these functions are for loading and saving the state of the digital pins and
+ * pin reporting so that the Arduino will start up again in the same state. The
+ * EEPROM is supposed to have a life of at least 100,000 writes.
+ */
+void loadSettings() {
+	//EEPROM.read();
+}
+
+void saveSettings() {
+	EEPROM.write(ANALOGINPUTSTOREPORT_LOW_BYTE, analogInputsToReport & 0xFF);
+	EEPROM.write(ANALOGINPUTSTOREPORT_HIGH_BYTE, analogInputsToReport >> 8);
+	EEPROM.write(REPORTDIGITALINPUTS_BYTE, reportDigitalInputs & 0xFF);
+	EEPROM.write(DIGITALPINSTATUS_LOW_BYTE, digitalPinStatus & 0xFF);
+	EEPROM.write(DIGITALPINSTATUS_HIGH_BYTE, digitalPinStatus >> 8);
+	EEPROM.write(PWMSTATUS_LOW_BYTE, pwmStatus & 0xFF);
+	EEPROM.write(PWMSTATUS_HIGH_BYTE, pwmStatus >> 8);
+}
+
+// =============================================================================
+// used for flashing the pin for the version number
+void pin13strobe(int count, int onInterval, int offInterval) {
+  byte i;
+  pinMode(13, OUTPUT);
+  for(i=0; i<count; i++) {
+    delay(offInterval);
+    digitalWrite(13,1);
+    delay(onInterval);
+    digitalWrite(13,0);
+  }
+}
+
+/*==============================================================================
+ * SETUP()
+ *============================================================================*/
+void setup() {
+  byte i;
+
+  // flash the pin 13 with the protocol version
+  pinMode(13,OUTPUT);
+  pin13strobe(2,1,4); // separator, a quick burst
+  delay(500);
+  pin13strobe(FIRMATA_MAJOR_VERSION, 200, 400);
+  delay(500);
+  pin13strobe(2,1,4); // separator, a quick burst
+  delay(500);
+  pin13strobe(FIRMATA_MINOR_VERSION, 200, 400);
+  delay(500);
+  pin13strobe(2,1,4); // separator, a quick burst
+
+  for(i=0; i<TOTAL_DIGITAL_PINS; ++i) {
+    setPinMode(i,OUTPUT);
+  }
+  // TODO: load state from EEPROM here
+
+  /* TODO: send digital inputs here, if enabled, to set the initial state on the
+   * host computer, since once in the loop(), the Arduino will only send data on
+   * change. */
+}
+
+/*==============================================================================
+ * LOOP()
+ *============================================================================*/
+void loop() {
+/* DIGITALREAD - as fast as possible, check for changes and output them to the
+ * FTDI buffer using Serial.print()  */
+  checkDigitalInputs();  
+  if(timer0_overflow_count > nextExecuteTime) {  
+	nextExecuteTime = timer0_overflow_count + 19; // run this every 20ms
+	/* SERIALREAD - Serial.read() uses a 128 byte circular buffer, so handle
+	 * all serialReads at once, i.e. empty the buffer */
+	checkForSerialReceive();
+	/* SEND FTDI WRITE BUFFER - make sure that the FTDI buffer doesn't go over
+	 * 60 bytes. use a timer to sending an event character every 4 ms to
+	 * trigger the buffer to dump. */
+	
+	/* ANALOGREAD - right after the event character, do all of the
+	 * analogReads().  These only need to be done every 4ms. */
+	for(analogPin=0;analogPin<TOTAL_ANALOG_PINS;analogPin++) {
+	  if( analogInputsToReport & (1 << analogPin) ) 
+		  Firmata.sendAnalog(analogPin, analogRead(analogPin));
+	}
+  }
+}