Data Acquisition Software Integration and ADC Characterisation Jack Hobbs 4 th August

The Original Aims We should have the ability to operate the Analogue to Digital Converter (ADC) from a LabVIEW data acquisition program. This program should be able to set up and alter any settings the ADC has. Ideally this could then be extended to the eventual full setup of 6 ADCs planned. 2

What This Means Write a collection of Dynamic Link Libraries (.dll) using the C programming language. These will sit on top of the Jungo libraries and USB drivers and make the operation of the ADC simple for any user or program that uses them. Write a LabVIEW program referencing these DLLs to operate the ADC. 3

USB Functions Initialise Communication Establish a connection Establish a connection Get the device parameters Get the device parameters Transfer the “HEX file” Transfer the “HEX file” Create a “Device Handle” Create a “Device Handle” End Communication   4

ADC Functions 16 channels of with individual settings: Active Active Gain Gain Average Average AC/DC AC/DC Sample rate Sample rateTriggeringResetting        5

ADC Functions Direct altering of registry values Continuous Mode (FFI) Burst Mode (FSI) Test Mode Start acquisition Stop acquisition Acquire error flags (Decode data) (Decode data)         6

What Has Been Done Everything with a tick has been written. Only the initialisation has been tested. It works. A centralised error code header file has been written.  7

What Is Left To Do All the crosses need to change to ticks. Decoding the output binary file should be easy. It is a separate task. I think it will be harder to implement the processes that surround actual data acquisition. A LabVIEW program must then be written.  8

Data Acquisition Will require more thought than the rest of the code. The C++ code and older DAQ software encounters problems with continuous mode. These are fundamental problems that have to be addressed before the C code is written. 9

Summary We should be able to set up the ADC soon. Next the ADC needs to be triggered for operation and transfer of data. This will take longer. Finally a LabVIEW program will be written to control every aspect of the ADC’s operation. 10