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diff --git a/digital-driver-board/firmware/TinyWire-master/TinyWireS/TinyWireS.h b/digital-driver-board/firmware/TinyWire-master/TinyWireS/TinyWireS.h
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+/*
+  TinyWireS.h - a wrapper class for Don Blake's usiTwiSlave routines.
+  Provides TWI/I2C Slave functionality on ATtiny processers in Arduino environment.
+  1/23/2011 BroHogan -  brohoganx10 at gmail dot com
+
+  Major credit and thanks to Don Blake for his usiTwiSlave code which makes this possible
+  http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=51467&start=all&postdays=0&postorder=asc
+  (Changed #define USI_START_COND_INT  USISIF (was USICIF) in usiTwiSlave.h)
+
+  NOTE! - It's very important to use pullups on the SDA & SCL lines! More so than with the Wire lib.
+  Current Rx & Tx buffers set at 32 bytes - see usiTwiSlave.h
+ 
+ USAGE is modeled after the standard Wire library . . .
+  Put in setup():
+	TinyWireS.begin(I2C_SLAVE_ADDR);                 // initialize I2C lib & setup slave's address (7 bit - same as Wire)
+
+  To Receive:
+    someByte = TinyWireS.available(){                // returns the number of bytes in the received buffer
+    someByte = TinyWireS.receive(){                  // returns the next byte in the received buffer
+
+  To Send:
+	TinyWireS.send(uint8_t data){                    // sends a requested byte to master
+	
+  TODO:	(by others!)
+	- onReceive and onRequest handlers are not implimented.
+	- merge this class with TinyWireM for master & slave support in one library
+	
+  This library 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 2.1 of the License, or any later version.
+  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.
+*/
+
+#ifndef TinyWireS_h
+#define TinyWireS_h
+
+#include <inttypes.h>
+
+
+class USI_TWI_S
+{
+  private:
+	//static uint8_t USI_BytesAvail;
+	
+  public:
+ 	USI_TWI_S();
+    void begin(uint8_t I2C_SLAVE_ADDR);
+    void send(uint8_t data);
+    uint8_t available();
+    uint8_t receive();
+    void onReceive( void (*)(uint8_t) );
+    void onRequest( void (*)(void) );
+};
+
+void TinyWireS_stop_check();
+// Implement a delay loop that checks for the stop bit (basically direct copy of the stock arduino implementation from wiring.c)
+void tws_delay(unsigned long);
+
+extern USI_TWI_S TinyWireS;
+
+#endif
+