public static WriteDataServiceReply WriteLogixData(SessionInfo si, string tagAddress, ushort dataType, ushort elementCount, byte[] data, ushort structHandle = 0x0000)
#endif
{
WriteDataServiceRequest request = BuildLogixWriteDataRequest(tagAddress, dataType, elementCount, data, structHandle);
EncapsRRData rrData = new EncapsRRData();
rrData.CPF = new CommonPacket();
rrData.CPF.AddressItem = CommonPacketItem.GetConnectedAddressItem(si.ConnectionParameters.O2T_CID);
rrData.CPF.DataItem = CommonPacketItem.GetConnectedDataItem(request.Pack(), SequenceNumberGenerator.SequenceNumber);
rrData.Timeout = 2000;
EncapsReply reply = si.SendUnitData(rrData.CPF.AddressItem, rrData.CPF.DataItem);
if (reply == null)
{
return(null);
}
if (reply.Status != 0)
{
return(null);
}
return(new WriteDataServiceReply(reply));
}
private void FindWritePacketOrCreate(PacketMap pm, WriteDataServiceRequest request)
{
//The data is already broken up into appropriately sized chunks, we just have
//to find a place to put it...
int rSize = request.Size;
for (int i = 0; i < _writeMsrPackets.Count; i++)
{
if (_writeMsrPackets[i].Size + rSize < MAX_MSR_SIZE)
{
//This one will fit the packet
int svc = _writeMsrPackets[i].AddService(request.Pack());
pm.PacketIndex.Add(i);
pm.ServiceIndex.Add(i);
return;
}
}
//If we got here, we have to create a new one...
MultiServiceRequest msr = new MultiServiceRequest();
pm.PacketIndex.Add(_writeMsrPackets.Count);
_writeMsrPackets.Add(msr);
pm.ServiceIndex.Add(msr.AddService(request.Pack()));
}
internal void GenerateRequests()
{
int rSize = 0;
_readRequest = LogixServices.BuildLogixReadDataRequest(_address, _elements, out rSize);
_writeRequest = LogixServices.BuildLogixWriteDataRequest(_address, _dataType, _elements, new byte[] { });
}
private void DistributeWriteRequest(PacketMap pm, byte[] requestData, int alignment)
{
//Ok, the request may have to be broken up into multiple requests...
if (requestData.Length > MAX_MSR_SIZE)
{
//This will have to be broken up... the overhead of an MSR packet is 12 bytes, so
//that means we can only fit up to MAX_MSR_SIZE - 12 bytes into a single packet.
//We need to figure out how much data we can stuff into one packet, then make
//multiple ones based on that...
//The first packet should always be the maximum size we can fit into one request...
WriteDataServiceRequest fragReq = LogixServices.BuildFragmentedWriteRequest(
_tags[pm.TagIndex].Address, _tags[pm.TagIndex].DataType, _tags[pm.TagIndex].Elements,
0, null, _tags[pm.TagIndex].StructHandle);
int maxSize = MAX_MSR_SIZE - 12 - fragReq.Size;
int alignedSize = maxSize - (maxSize % alignment);
int remainingSize = requestData.Length;
uint offset = 0;
while (remainingSize > 0)
{
//We can fit up to alignedSize bytes in the array...
byte[] temp;
if (remainingSize < alignedSize)
{
temp = new byte[remainingSize];
remainingSize = 0;
}
else
{
temp = new byte[alignedSize];
remainingSize -= alignedSize;
}
Buffer.BlockCopy(requestData, (int)offset, temp, 0, temp.Length);
fragReq = LogixServices.BuildFragmentedWriteRequest(_tags[pm.TagIndex].Address,
_tags[pm.TagIndex].DataType, _tags[pm.TagIndex].Elements, offset, temp, _tags[pm.TagIndex].StructHandle);
offset += (uint)temp.Length;
FindWritePacketOrCreate(pm, fragReq);
}
}
else
{
//We can fit it into a single packet, we just need to find
//one
WriteDataServiceRequest request = LogixServices.BuildLogixWriteDataRequest(
_tags[pm.TagIndex].Address, _tags[pm.TagIndex].DataType, _tags[pm.TagIndex].Elements,
requestData, _tags[pm.TagIndex].StructHandle);
FindWritePacketOrCreate(pm, request);
}
}
public static WriteDataServiceRequest BuildLogixWriteDataRequest(string tagAddress, ushort dataType, ushort elementCount, byte[] data, ushort structHandle = 0x0000)
#endif
{
byte[] newIOI = IOI.BuildIOI(tagAddress);
int pathLen = newIOI.Length;
WriteDataServiceRequest request = new WriteDataServiceRequest();
request.Service = (byte)ControlNetService.CIP_WriteData;
request.PathSize = (byte)(pathLen / 2);
byte[] path = new byte[pathLen];
Buffer.BlockCopy(newIOI, 0, path, 0, newIOI.Length);
request.Path = path;
request.Elements = elementCount;
request.DataType = dataType;
request.StructHandle = structHandle;
request.Data = data;
return request;
}
public static WriteDataServiceRequest BuildFragmentedWriteRequest(string tagAddress, ushort dataType, ushort elementCount, uint offset, byte[] data, ushort structHandle = 0x0000)
#endif
{
byte[] newIOI = IOI.BuildIOI(tagAddress);
int pathLen = newIOI.Length;
WriteDataServiceRequest request = new WriteDataServiceRequest();
request.Service = (byte)ControlNetService.CIP_WriteDataFragmented;
request.PathSize = (byte)(pathLen / 2);
byte[] path = new byte[pathLen];
Buffer.BlockCopy(newIOI, 0, path, 0, newIOI.Length);
request.Path = path;
request.Elements = elementCount;
request.DataType = dataType;
request.StructHandle = structHandle;
request.IsFragmented = true;
request.Offset = offset;
request.Data = data;
return request;
}
internal void GenerateRequests()
{
int rSize = 0;
_readRequest = LogixServices.BuildLogixReadDataRequest(_address, _elements, out rSize);
_writeRequest = LogixServices.BuildLogixWriteDataRequest(_address, _dataType, _elements, new byte[] { });
}