void SendReadCommand()
{
byte[] data = new byte[MaxVariableCount * 4 + 3];
data[0] = (byte)0xA5;
data[1] = (byte)0xB3;
ElfVariableList fields = variables.GetAllFields();
if (previousFieldsCount != fields.Count)
{
previousFieldsCount = 0;
prevLastIndex = 0;
}
if (fields.Count <= MaxVariableCount)
{
for (int i = 0; i < fields.Count; i++)
{
int address = Convert.ToInt32(fields[i].Address, 16);
data[i * 4 + 2] = (byte)(address & 0xFF);
data[i * 4 + 2 + 1] = (byte)((address >> 8) & 0xFF);
data[i * 4 + 2 + 2] = (byte)((address >> 16) & 0xFF);
data[i * 4 + 2 + 3] = (byte)((address >> 24) & 0xFF);
}
for (int i = fields.Count; i < MaxVariableCount; i++)
{
//int address = Convert.ToInt32(fields[i].Address, 16);
data[i * 4 + 2] = (byte)(0);
data[i * 4 + 2 + 1] = (byte)(0);
data[i * 4 + 2 + 2] = (byte)(0);
data[i * 4 + 2 + 3] = (byte)(0);
}
}
else
{
if (prevLastIndex + MaxVariableCount <= fields.Count)
{
for (int i = prevLastIndex + 1; i <= prevLastIndex + MaxVariableCount; i++)
{
int address = Convert.ToInt32(fields[i].Address, 16);
data[(i % MaxVariableCount) * 4 + 2] = (byte)(address & 0xFF);
data[(i % MaxVariableCount) * 4 + 2 + 1] = (byte)((address >> 8) & 0xFF);
data[(i % MaxVariableCount) * 4 + 2 + 2] = (byte)((address >> 16) & 0xFF);
data[(i % MaxVariableCount) * 4 + 2 + 3] = (byte)((address >> 24) & 0xFF);
}
prevLastIndex = prevLastIndex + MaxVariableCount;
if (prevLastIndex == fields.Count)
{
prevLastIndex = 0;
}
}
else
{
int byteIndex = 0;
for (int i = prevLastIndex + 1; i < fields.Count; i++)
{
int address = Convert.ToInt32(fields[i].Address, 16);
int startByteIndex = byteIndex * 4 + 2;
data[startByteIndex] = (byte)(address & 0xFF);
data[startByteIndex + 1] = (byte)((address >> 8) & 0xFF);
data[startByteIndex + 2] = (byte)((address >> 16) & 0xFF);
data[startByteIndex + 3] = (byte)((address >> 24) & 0xFF);
byteIndex++;
}
int count = MaxVariableCount - (fields.Count - prevLastIndex) + 1;
for (int i = 0; i < count; i++)
{
int address = Convert.ToInt32(fields[i].Address, 16);
int startByteIndex = byteIndex * 4 + 2;
data[startByteIndex] = (byte)(address & 0xFF);
data[startByteIndex + 1] = (byte)((address >> 8) & 0xFF);
data[startByteIndex + 2] = (byte)((address >> 16) & 0xFF);
data[startByteIndex + 3] = (byte)((address >> 24) & 0xFF);
byteIndex++;
}
prevLastIndex = MaxVariableCount - count;
}
}
data[MaxVariableCount * 4 + 2] = (byte)0x0D;
if (serialPort.IsOpen)
{
try
{
serialPort.Write(data, 0, MaxVariableCount * 4 + 3);
}
catch
{
}
}
previousFieldsCount = fields.Count;
}
