/// <summary>
/// Sends an array of `data` to a tag (with EPC starting with `tagId`) to a specific `address`.
///
/// The transfer is done by grouping multiple BlockWrite commands into a single AccessSpec
///
/// Note: with the current configuration `ReaderManager.SendData` tends to peform better
/// </summary>
public async Task <OperationResponse> SendDataBatch(ushort tagId, byte[] data, int bytesPerChunk, ushort baseAddress, TimeSpan?timeout = null)
{
this.PrepareReader();
var targetTag = LLRPHelpers.WispTag(tagId);
var controlResponse = await this.SendControlWithPowerCheck(tagId, TagState.SetOffset, 0x0000);
if (controlResponse.status != SecuCode.StatusCode.Success)
{
return(controlResponse);
}
var commands = new List <PARAM_C1G2BlockWrite>();
var offset = baseAddress;
foreach (var chunk in data.Split(bytesPerChunk))
{
var bytes = chunk.ToArray();
commands.Add(this.BlockWriteCmd(offset, bytes));
offset += (ushort)(bytes.Length / 2);
}
this.reader.Add_ContinuousAccessSpec(targetTag, commands.Select(a => a as IParameter).ToList());
return(await this.StartAndWaitBlockWriteAcks(commands, tagId, timeout));
}
/// <summary>
/// Adds a new access spec for reading a number of bytes from the tag
/// </summary>
private void AddReadAccessSpec(ushort tagId, ushort memoryBank, ushort address, ushort length)
{
var accessSpecOp = LLRPHelpers.ReadMessage(memoryBank, address, length);
var targetTag = LLRPHelpers.WispTag(tagId);
this.reader.Add_ContinuousAccessSpec(targetTag, new List <IParameter> {
accessSpecOp
});
}
/// <summary>
/// Adds a new access spec for sending a control message
/// </summary>
private PARAM_C1G2BlockWrite AddControlAccessSpec(ushort?tagId, ushort state, ushort value)
{
var accessSpecOp = LLRPHelpers.ControlMessage(state, value);
var targetTag = LLRPHelpers.WispTag(tagId);
this.reader.Add_ContinuousAccessSpec(targetTag, new List <IParameter> {
accessSpecOp
});
return(accessSpecOp);
}
private Task <OperationResponse> SendDataBlock(ushort tagId, ushort offset, byte[] dataBlock, TimeSpan?timeout = null)
{
var targetTag = LLRPHelpers.WispTag(tagId);
var accessSpec = this.BlockWriteCmd(offset, dataBlock);
this.reader.Add_ContinuousAccessSpec(targetTag, new List <IParameter> {
accessSpec
});
return(this.StartAndWaitBlockWriteAcks(new List <PARAM_C1G2BlockWrite> {
accessSpec
}, tagId, timeout));
}
/// <summary>
/// Generates a "true" BlockWrite command from an offset and an array of data, taking care to
/// avoid overlapping with the control messages we generate
/// </summary>
private PARAM_C1G2BlockWrite BlockWriteCmd(ushort offset, byte[] dataBlock)
{
var words = new UInt16Array();
for (var i = 0; i < dataBlock.Length; i += 2)
{
words.Add((ushort)((dataBlock[i + 1] << 8) | dataBlock[i]));
}
var accessSpec = LLRPHelpers.DataMessage(words, offset, (ushort)this.nextAccessCmdId);
this.nextAccessCmdId += 1;
return(accessSpec);
}
