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The FPGA is the hub of the digital control board and all other chips are connected to and controlled by it. This article discusses the programming of the FPGA. All code is written in [http://en.wikipedia.org/wiki/VHDL VHDL]. For the purposes of testing, each chip has not only a controller written for it, but an emulator as well.
== The DAC ==
=== Emulator ===
[[Image:DAC Emulator Block.JPG|thumb|DAC emulator functional block diagram]]
[[Image:DAC Emulator Block.JPG|thumb|DAC emulator functional block diagram]]
=== Controller ===
[[Image:DAC Controller Block.JPG|thumb|DAC controller functional block diagram]]
[[Image:DAC Controller Block.JPG|thumb|DAC controller functional block diagram]]
== The Temperature Sensor ==
=== Emulator ===
[[Image:Temp Emulator Block.JPG|thumb|Temperature sensor emulator functional block diagram]]
[[Image:Temp Emulator Block.JPG|thumb|Temperature sensor emulator functional block diagram]]
=== Controller ===
[[Image:Temp Controller Block.JPG|thumb|Temperature sensor controller functional block diagram]]
[[Image:Temp Controller Block.JPG|thumb|Temperature sensor controller functional block diagram]]