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Transfer the data that are recorded for various Test Input channels. -More...

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Transfer the data that are recorded for various Test Input channels.

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The DAP_TI_TransferBlock Command initiates the data transfer of a single trace data block of the recorded trace data. The command delivers the content of one trace data block in the Trace Data Management system.

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DAP_TI_TransferBlock Request:

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| BYTE | BYTE *******|

-> 0x20 | DataRequest |

-|******|*************|

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DataRequest: specifies the requested data from the Trace Data Management system.
- bit 0: 1 = deliver one trace data block from any full trace data block (this includes SWO).
- bit 1: 1 = deliver one trace data block from SWO channel (even when partially filled).
- bit 2: 1 = deliver one trace data block from any partially filled trace data block (this includes SWO).
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DAP_TI_TransferBlock Response:

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| BYTE | BYTE ***| SHORT ****| WORD ********|+++++++++++++|

-< 0x20 | Channel | DataParms | TD_TimeStamp | ChannelData |

-|******|*********|///////////|//////////////|+++++++++++++|

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Channel:
- bit 0..3: number of the channel that the data belong to.
- bit 4: SWO record indicator: 1 = data belong to SWO data recording.
- bit 6: First record indicator: 1 = DataParms and TimeStamp is transferred. 0 = Only ChannelData.
- bit 7: No data indicator: 1 = No ChannelData available for this request. 0 = ChannelData are available.
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DataParms: parameters for ChannelData.
- bit 0..12: number of data values in ChannelData. DAP_TI_TransferBlock Response is repeated until all values are transmitted.
- bit 14: 1 = difference value format. 0 = contiguous value format.
- bit 15: 1 = Trace Data Management overflow since last DAP_TI_TransferBlock Request. 0 = no overflow.
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TD_TimeStamp: Test Domain Timer value at the read time of data values for ChannelData.
ChannelData: data values from the recorded Test Input channel.

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The ChannelData reply has depending on DataParms bit 14 two different formats. If ChannelDiff in DAP_TI_Capture Request is set for the specific channel, the Debug Unit may decide the data format depending on the trace data values.

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Contiguous Value Format transmits sequentially all data values stored in the trace data buffer. When DataParms bit 14 = 0 the ChannelData has the following format:

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|************|************|************|......

-| TraceValue | TraceValue | TraceValue |

-|************|************|************|......

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The size of TraceValue depends on the data size for the channel (see DAP_TI_Info Response, Attributes bit 0..2). DAP_TI_TransferBlock Response is repeated until the number of TraceValues specified by DataParms bit 0 .. 12 is transmitted.

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Difference Value Format transmits data values only when there is a significant difference. When DataParms bit 14 = 1 the ChannelData has the following format:

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|*************| SHORT *****|*************|......

-| TraceValue0 | ValueIndex | TraceValueI |

-|*************|////////////|/////////////|......

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TraceValue0: is the first data value on the trace data buffer
ValueIndex: information about the next data value in TraceValueI.
- bit 0..12: index in trace data buffer of next data value with significant difference.
- bit 15: 1 = last trace value of trace data buffer send by DAP_TI_TransferBlock Response.
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TraceValueI: is the trace data value in in trace data buffer referenced by index.

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The size of TraceValue0 and TraceValueI depends on the data size for the channel (see DAP_TI_Info Response, Attributes bit 0..2). DAP_TI_TransferBlock Response is repeated until ValueIndex with bit 15 = 1 is transmitted.

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Note: When all data values in the trace buffer are identical, ValueIndex is set to number of data values with bit 15 set to 1.

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