1. Completed TasksTasks in Progress Raphael Redo (if necessary) ExpressPCB schematic Circuit for voltage requirements? External power? Dan Researched components UV flux circuit design/layout Sam Wrote new USB protocol Started changes for ping- pong buffering Ping-pong buffering Change USB protocol Chen Save data, w/ a computer-generated time stamp, as an ASCII file; fix/modify 2008 client Team Scheduled Wednesday meeting w/ Gill Pratt Make the front-end give us results for the X-ray source Test histogram code and constant time- to-sample code

2. BytesHeaderData 1101-xxxxxNA (reserved header) 1011-xxxxx5-bit error code 3110-xxxxx2-byte fast counter value (implicit?) 64001-(2-bit index)63-byte chunk of histogram 1 ( bins 0-251); start client time 64010-(2-bit index)63-byte chunk of histogram 2 ( bins 256-507) 64100-(2-bit index)63-byte chunk of histogram 3 ( bins 512-763) 64111-(2-bit index)63-byte chunk of histogram 4 ( bins 768-1019) 64000-xxxxx16-byte chunk of backwash histograms; stop client time Data Stream Protocol Unless explicitly stated otherwise, all datatypes are unsigned integer values with the given number of bits All values, whether single- or multi-byte, are always described and transmitted most- significant bit first IN-bound (from Device to PC)

3. BytesHeaderAdditional DataComments 10000 NoneNA (reserved header) 2001x xxxxxxxx Set 13-bit threshold value; linear from 0-5V 2010x xxxxxxxx Set 13-bit time-to-sample; 50 ns to 50 μs 2011x xxxxxxxx Set the gain; 1X to 10X 1100x xxxxNoneCoincidence/anti-coincidence/no coincidence 1101x xxxxNoneStart/stop/reset OUT-bound (from PC to Device)