I've just pushed an all-singing, mostly dancing csv output module to g...@github.com:mwm/libsigrok.git. This correctly handles multiple analog values from the demo driver (which the old one didn't do) and implements most of the features on the todo list. It also adds a few more features that make it possible to recreate the gnuplot module output with it, meaning you can now use gnuplot on analog values, etc. The complete options list is at the end of the message. Please give it a try and let me know what you think, if you have problems, or you think the defaults ought to be adjusted.
Issues; sigrok-cli insists that all analog values be displayed, sending them to the analog output module if the configured module doesn't generate any output. The demo driver sends all channels, no matter what. This results in analog values that the CSV module doesn't display being displayed via the analog module. This strikes me as a bug in sigrok-cli, so I just nuked it for now.. The demo driver has some quirks that don't interact well with analog values. In particular, it seems to have a fencepost error, outputting one last set of analog values after the number of samples you ask for via --samples. It also sends all channels, not just disabled channels. This two things interact with the way analog samples are handled in the output module to create events it feels are worthy of a warning at the end of the file. In particular, if you don't use the last analog value, or mix digital and analog values, those last packets will generate warnings about short packets. I'll be sending another bit of mail shortly about analog value handling, frames, etc. To me, the most interesting new feature is the "gnuplot" option. The contributes scripts were interesting, but not really suited to interactive use. This creates a gnuplot script that can be invoked from gnuplot via the "call" command, passing it the name of the data file as a parameter. The csv module sniffs the output data, and positions the resulting plots accordingly. An options is included that scales the graphs of all the channesl to the same peak-to-peak value. It doesn't set anything; the idea is that the calling gnuplot script (or interactive session) will set styles, linetypes, and terminal to get the output the user wants. * gnuplot: Write out a gnuplot intrerpreter script (.gpi file) to plot * the datafile using the parameters given. It should be called * from a gnuplot session with the data file name as a paramter * after adjusting line styles, terminal, etc. * * scale: The gnuplot graphs are scaled so they all have the same * peak-to-peak distance. Defaults to TRUE. * * value: The string used to separate values in ba record. Defaults to ','. * * record: The string to use to separate records. Default is newline. gnuplot * files must use newline. * * frame: The string to use when a frame ends. The default is a blank line. * This may confuse some csv parsers, but it makes gnuplot happy. * * comment: The string that starts a comment line. Defaults to ';'. * * header: Print header comment with capture metadata. * * label: Add a line of channel labels as the first line of output. * * time: Whether or not the first column should include the time the sample * was taken. Defaults to TRUE. * * dedup: Don't output duplicate rows. Defaults to TRUE. If time is off, then * this is forced to be off.
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