Interface 1: KnobsGUI: link the buttons/knobs to “an action”; prompt MCA.py

USB Client: do bit-masking and packet formation; send data as a control transfer

Firmware/Hardware: extract control bits and link to

• Change variable -> new time – to – sample

• Change pot value -> new threshold voltage

• Change firmware logic -> new coincidence mode

• Change pot value -> new signal gain

Interface 2: Data CollectionHardware: get data to firmware using SPI or direct lines

Firmware: process data into packets; feed the bulk endpoint 64-byte chunks of

histogram + fast count; set UOWN and the USB SIE takes over

USB Client: decodes packets using data protocol; ships data to the GUI

GUI: saves data as ASCII; updates screen every 1 second and updates scale every

15 seconds

Completed Tasks Tasks in Progress

Raphael • Identified voltage buffer issues• New schematic is more or less done• Switched out DAC for digital pot

• Circuit debugging• Test new buffer

Dan • UV flux circuit design/layout

Sam • Packet formation of histogram data and fast count data• Started brown-bag lunch presentation

• End-to-end testing of ADC to PIC to USB to Mac

Chen • Continuous updating of USB client• ASCII file w/ string input

• GUI histogram

Team • Make the front-end give us results for the X-ray source• Test histogram code and constant time-to-sample code