1Wire communication in the Logic Analyzer of WaveForms3

[JosefS]

Hi there,

I have a question regarding the 1Wire (or one Wire) communication in the "Logic Analyzer" of the "WaveForms3". When I measure the 1 Wire signal, parts of the signal are recognized as commands. For example some are described as "Command [hXX]" or "Match ROM [h55]". I generate the one Wire signal with an external µC and for different signals i got different descriptions.

My question is: Is there some where a definition of these command? What input will result in what command? Can they be changed by the user?

I am am using the Analog Discovery 2.

Here is also a picture:

 

Thank you very much!

 

[attila]

Hi @JosefS

It can decode the following 1-wire data. This cannot be changed by the user.

Reset
Presence
Read ROM [0x33]
Skip ROM [0xCC]
Match ROM [0x55]
Search ROM [0xF0]
Overdrive Skip ROM [0x3C]
Overdrive Match ROM [0x69]
Alarm Search [0xEC]
Convert T [0x44]
Resume [0xA5]
Write Scratchpad [0x4E]
Read Scratchpad [0xBE]
Recall [0xB8]
Read Power Supply [0xB4]
Command [0x..]
Family: 0x..
SN LSB: 0x..
SN MSB: 0x..
CRC: 0x..
Data: 0x..

[JosefS]

Hi attila,

and thank you. That was very helpful. Is there a documentation or something where I can find more information to this topic?

Do you know if there is a way to use similar commands for a 16Bit 1 Wire communication instead of 8Bit?

[attila]

Hi @JosefS

Only the above commands are recognized and the others printed as byte.
Since there are printed in hexadecimal it should be simple to interpret as 16bit values.