public static S7ReadJobAckDatagram TranslateFromMemory(Memory <byte> data) { var span = data.Span; var result = new S7ReadJobAckDatagram { Header = S7AckDataDatagram.TranslateFromMemory(data), }; var offset = result.Header.GetParameterOffset(); result.Function = span[offset++]; result.ItemCount = span[offset++]; for (var i = 0; i < result.ItemCount; i++) { var res = S7DataItemSpecification.TranslateFromMemory(data.Slice(offset)); result.Data.Add(res); offset += res.GetSpecificationLength(); if (offset % 2 != 0) { offset++; } } return(result); }
public static Memory <byte> TranslateToMemory(S7ReadJobAckDatagram datagram) { var result = S7AckDataDatagram.TranslateToMemory(datagram.Header); var span = result.Span; var offset = datagram.Header.Header.GetHeaderSize(); span[offset++] = datagram.Function; span[offset++] = datagram.ItemCount; foreach (var item in datagram.Data) { S7DataItemSpecification.TranslateToMemory(item, result.Slice(offset)); offset += item.GetSpecificationLength(); } return(result); }
public static S7ReadJobAckDatagram Build(SiemensPlcProtocolContext context, int id, IEnumerable <ReadResultItem> vars) { var result = new S7ReadJobAckDatagram(); ushort dataLength = 0; result.Header.Header.ProtocolDataUnitReference = (ushort)id; if (vars != null) { result.ItemCount = (byte)vars.Count(); var numberOfItems = result.ItemCount; foreach (var item in vars) { numberOfItems--; result.Data.Add(new S7DataItemSpecification { ReturnCode = (byte)item.ReturnCode, TransportSize = (byte)item.TransportSize, Length = item.NumberOfItems, Data = item.Data, FillByte = numberOfItems == 0 || item.NumberOfItems % 2 == 0 ? Array.Empty <byte>() : new byte[1], ElementSize = item.ElementSize }); if ((dataLength % 2) != 0) { dataLength++; } dataLength += (ushort)item.Data.Length; } } result.Header.Header.ParamLength = (ushort)2; result.Header.Header.DataLength = (ushort)(dataLength + result.Data.Count * 4); result.ItemCount = (byte)result.Data.Count; return(result); }
public static IMemoryOwner <byte> TranslateToMemory(S7ReadJobAckDatagram datagram, out int memoryLength) { var result = S7AckDataDatagram.TranslateToMemory(datagram.Header, out memoryLength); var take = memoryLength - datagram.Header.GetParameterOffset(); var mem = result.Memory.Slice(datagram.Header.GetParameterOffset(), take); var span = mem.Span; var offset = 0; span[offset++] = datagram.Function; span[offset++] = datagram.ItemCount; foreach (var item in datagram.Data) { S7DataItemSpecification.TranslateToMemory(item, mem.Slice(offset)); offset += item.GetSpecificationLength(); if (offset % 2 != 0) { offset++; } } return(result); }