//lineNum = -1 - искать во всех командах
//lineNum = x - искать в команде на определенной стоке базы
public static bool FindCommand(int _pos, int lineNum = -1)
{
//reset all result values
ClearCommand();
if (sourceData.Count < _pos + 1)
{
return(false);
}
//check if it's a command or reply
if (sourceData[_pos] == frameStartSign)
{
CSVColumns.CommandParameterSize = 1;
CSVColumns.CommandParameterType = 2;
CSVColumns.CommandParameterValue = 3;
CSVColumns.CommandDescription = 4;
itIsReply = false;
if (sourceData.Count < _pos + 3)
{
return(false);
}
}
else if (sourceData[_pos] == ackSign || sourceData[_pos] == nackSign)
{
itIsReply = true;
if (sourceData[_pos] == nackSign)
{
itIsReplyNACK = true;
}
CSVColumns.CommandParameterSize = 5;
CSVColumns.CommandParameterType = 6;
CSVColumns.CommandParameterValue = 7;
CSVColumns.CommandDescription = 8;
if (sourceData.Count < _pos + 4)
{
return(false);
}
_pos++;
}
else
{
return(false);
}
//select data frame
commandFrameLength = 0;
if (sourceData[_pos] == frameStartSign)
{
commandFrameLength = sourceData[_pos + 1];
commandFrameLength = commandFrameLength + sourceData[_pos + 2] * 256;
_pos += 3;
}
else
{
return(false);
}
//check if "commandFrameLength" less than "sourcedata". note the last byte of "sourcedata" is CRC.
if (sourceData.Count < _pos + commandFrameLength + 1)
{
commandFrameLength = sourceData.Count - _pos;
lengthIncorrect = true;
}
//find command
var i = 0;
if (lineNum != -1)
{
i = lineNum;
}
if (sourceData.Count < _pos + 1)
{
return(false); //check if it doesn't go over the last symbol
}
for (; i < commandDataBase.Rows.Count; i++)
{
if (commandDataBase.Rows[i][CSVColumns.CommandName].ToString() != "")
{
if (sourceData[_pos] ==
Accessory.ConvertHexToByte(commandDataBase.Rows[i][CSVColumns.CommandName].ToString())
) //if command matches
{
if (lineNum < 0 || lineNum == i) //if string matches
{
commandName = commandDataBase.Rows[i][CSVColumns.CommandName].ToString();
commandDbLineNum = i;
commandDesc = commandDataBase.Rows[i][CSVColumns.CommandDescription].ToString();
commandFramePosition = _pos;
//get CRC of the frame
//check length of sourceData
int calculatedCRC =
Q3xf_CRC(sourceData.GetRange(_pos - 2, commandFrameLength + 2).ToArray(),
commandFrameLength + 2);
int sentCRC = sourceData[_pos + commandFrameLength];
if (calculatedCRC != sentCRC)
{
crcFailed = true;
}
else
{
crcFailed = false;
}
//check command height - how many rows are occupated
var i1 = 0;
while (commandDbLineNum + i1 + 1 < commandDataBase.Rows.Count &&
commandDataBase.Rows[commandDbLineNum + i1 + 1][CSVColumns.CommandName].ToString() ==
"")
{
i1++;
}
commandDbHeight = i1;
return(true);
}
}
}
}
return(false);
}
