Hi Matthias,

> Is it also possible not to take only the (mostly proprietary) formats
> of the scopes or meters and to decode their analog measurement
> values, but also to take digitally-encoded values from a digital
> stream? I mean interpreting specific data blocks which are part of a
> higher-level protocol, e.g. TWI, UART, SPI, etc.?

Certainly. Like Gerhard already explained, you can use a low-level
decoder such as TWI, UART or SPI to make sense of the raw signal levels
and then stack another decoder on top, depending on the device you're
looking at. This stacked decoder can then output filtered data or
processed data.


> Really basic example: let's say there are some temperature
> measurement ICs connected via TWI or UART. Can I use sigrok/PulseView
> to display the measured values next to encoded data by writing a
> protocol decoder (pd)?

Yes, you can. However, I'd like to make you aware of the current
limitation for this. What you can do is decode the data and emit an
annotation that gives the current sensor value, similar to [1].
What you currently cannot do is produce an analog trace from such
values. That'll be possible in the future but isn't implemented yet.

All the best,
 -Soeren

[1] http://www.sigrok.org/blog/sites/default/files/pulseview_am230x.png




> Cheers,
> Matthias
> 
> [0]: https://sigrok.org/wimg/a/a1/Pulseview_rigol_2_analog_channels.p
> ng
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