Transactions

[sde1000]

Some DALI command sequences are supposed to be sent as "transactions"; in particular, configuration commands that are sent twice must be sent as transactions. It looks like the DALI USB has some support for this (although not full support, surprisingly).

Example sequences:

    158 1493.945513    host        1.10.2      120320030000a50000 Special	A500	*	INITIALIZE (all) (sent twice)
    160 1493.963284    1.10.1      host        12730000a500ffff03 ... and we get
    162 1493.990289    1.10.1      host        12730000a500009103 ... two "1273" responses
    164 1494.000281    1.10.1      host        127100000000008a03 ... and a final "1271" response

If byte 2 is '0x20' then the command is transmitted twice. We get two '0x73' transmission reports, followed by the final 'no response' report.

      9 3.950105       host        1.10.2      125530030000ff2c55 DTR0=0x55 followed by SET SYSTEM FAILURE LEVEL (DTR0) (twice)
     11 3.967897       1.10.1      host        12730000a355ffff55 ... A355 (DTR0=0x55) transmission report 
     13 3.993899       1.10.1      host        12730000ff2c009155 ... FF2C (SET SYSTEM FAILURE LEVEL) transmission report
     15 4.020910       1.10.1      host        12730000ff2c009155 ... FF2C (SET SYSTEM FAILURE LEVEL) transmission report (again)
     17 4.030894       1.10.1      host        127100000000008a55 ... no response

If byte 2 is 0x30, byte 8 is used to construct a "Set DTR0" command, and then the command supplied in bytes 6–7 is sent twice. Transmission reports are received for all three forward frames, followed by the usual response status. (Annoyingly I was setting DTR0 to 0x55 here, which happened to be the same as the serial number. I have other examples where the serial number is different, however: there's one in issue #2.)

I didn't manage to get masterCONFIGURATOR to do any other transactions. A "QUERY NEXT DEVICE TYPE" sequence is supposed to be done as a transaction, but it doesn't:

    634 1497.094771    host        1.10.2      125200030000059900 Query	0599	A2	QUERY DEVICE TYPE
    636 1497.117224    1.10.1      host        127300000599009152 
    638 1497.132264    1.10.1      host        1272000000ff005d52   Answer	FF		= 255 (0xFF)
    640 1497.135044    host        1.10.2      12530003000005a700 Query	05A7	A2	QUERY NEXT DEVICE TYPE
    642 1497.158236    1.10.1      host        1273000005a7009153 
    644 1497.173239    1.10.1      host        127200000001005b53   Answer	01		= 1 (0x01)
    646 1497.177923    host        1.10.2      12540003000005a700 Query	05A7	A2	QUERY NEXT DEVICE TYPE
    648 1497.199249    1.10.1      host        1273000005a7009154 
    650 1497.214239    1.10.1      host        127200000006005d54   Answer	06		= 6 (0x06)
    652 1497.215556    host        1.10.2      12550003000005a700 Query	05A7	A2	QUERY NEXT DEVICE TYPE
    654 1497.240244    1.10.1      host        1273000005a7009155 
    656 1497.255239    1.10.1      host        1272000000fe005d55   Answer	FE		= 254 (0xFE)