messages.md

Output messages use the following format (except for the firmware information message)

'{' <timestamp> (':'|'>') <length> ' ' <data> '}'

<timestamp> : integer number, 
            each tick represents 1 millisecond, 
            number is given in hex presentation, 
            fixed length of 8 digits

<length>    : data bits received, or status code 
            number is given in hex presentation, 
            fixed length of 2 digits
            for status codes bit 7 is set, see table
<data>      : received data payload, or additional information

Status Codes

Status Code	Description	Information in data
80	No error	N/A
81	Timeout	N/A
82	Bad start bit timing	Observed bit timing in µs
83	Bad data bit timing	Observed bit timing in µs
84	Collision detected (loopback)	N/A
85	Collision detected (no change)	N/A
86	Collision detected (wrong state)	N/A
87	Settling time violation	N/A
90	System is idle	N/A
91	System has failure (bus low)	N/A
92	System has recovered	N/A
A0	Can not process command	N/A
A1	Bad argument to command	N/A
A2	Queue is full	N/A
A3	Bad command	N/A
A4	Buffer overflow	N/A

NOTE The observed bit timing is shifted by 8 bits to the left, and the lower 8 bits code the data bit where the timing error occured.

sequenceDiagram
    participant USB
    participant Device
    participant DALI
    USB ->> Device: `S1 10 FF00`
    activate Device
    Device -->> DALI: 0xFF00
    Device -->> USB: `{00000011>10 FF00}
    deactivate Device

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sequenceDiagram
    participant USB
    participant Device
    participant DALI
    USB ->> Device: `Q1 10 FF00`
    activate Device
    Device -->> DALI: 0xFF00
    Device -->> USB: `{00000011>10 FF00}
    Note over DALI: no one replies 
    Device -->> USB: `{00000015:81 0000}
    deactivate Device
    USB -->> Device: `Q1 10 FF90' 
    activate Device
    Device -->> DALI: 0xFF90
    Device -->> USB: {00000020:10 FF90}
    DALI -->> Device: 0xC4
    Device -->> USB: {00000026:08 C4}
    deactivate Device

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