Vishay 7000 - Sample Code

Vishay Micro-Measurements System 7000 Programmer’s Reference Manual
Page 45 of 142
3.14.2.7 Sample Code
This Microsoft Visual Studio C# code snippet shows a basic technique for decoding the data found in a
System 7000 data file from a single card. It assumes that all 8 channels have been assigned to the same
recording group, but the technique shown can easily be expanded to include all groups. In this sample,
the decoded values are written to a console window. In your application you will store and analyze the
data as appropriate. This snippet has been written to make it easy to understand; it is recommended that
you optimize the logic as needed for your requirements. This snippet is included as a sample for the
ActiveX interface.
byte[] inByte = new byte[6]; // byte is an unsigned 8-bit integer
sbyte[] dataByte = new sbyte[4]; // sbyte is a signed, 8-bit integer
byte statusByte;
byte dataType;
byte scanIDSize;
byte extendedStatusByte;
byte groupARecorded;
byte groupBRecorded;
byte groupCRecorded;
byte groupDRecorded;
byte absDataSize;
ulong scanID; // (ulong is a 64-bit, unsigned integer)
int[] groupAValue = new int[8]; // maximum of 8 channels on a card
int[] groupBValue = new int[8];
// For this sample, hard code the number of channels in each group
int numChannelsinGroupA = 8;
try
{
// Open an existing binary file - a .7KD, System 7000 Data File
BinaryReader inFile = new BinaryReader(File.Open("C:\\Temp\\00011234.7KD",FileMode.Open));
// Each iteration of the loop will process a single scan
// Start by reading 1 byte from the file stream (this single, first byte
// is our status byte
scanID = 0;
while (inFile.Read(inByte, 0, 1) != 0)
{
// Decode the status byte
statusByte = inByte[0];
// 0 = relative data, 1 = absolute data
dataType = (byte)(statusByte & (byte)0x01);
// 00 = auto-increment, 01 = 16 bits, 02 = 32 bits, 11 = 48 bits
scanIDSize = (byte)((statusByte & (byte)0x06) >> 1);
// 00 = No, 01 = Yes
extendedStatusByte = (byte)((statusByte & (byte)0x08) >> 3);
groupARecorded = (byte)((statusByte & (byte)0x10) >> 4);
groupBRecorded = (byte)((statusByte & (byte)0x20) >> 5);
groupCRecorded = (byte)((statusByte & (byte)0x40) >> 6);
groupDRecorded = (byte)((statusByte & (byte)0x50) >> 7);
// if we have an extended status byte, read the absolute data size
if (extendedStatusByte == 1)
{
// Read one byte from our file stream
if (inFile.Read(inByte, 0, 1) == 0) throw new System.ApplicationException();
// 0 = 16 bits, 1 = 32 bits
absDataSize = (byte)(inByte[0] & (byte)0x01);
}
else
{
// If there is no extended status byte assume the data size is 16 bits
absDataSize = 0;
}
// Next in the file stream is the scan id
if (scanIDSize == 00)
{
// auto-increment the scan id
scanID++;
}
else if (scanIDSize == 01)
{
// read in a 16-bit (2 byte) scan id