DocScrutinizer05 changed the topic of #neo900 to: http://neo900.org | conversations are logged to http://infobot.rikers.org/%23neo900/ and http://irclog.whitequark.org/neo900
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<DocScrutinizer05> kerio: no more cheating ;-) http://privatepaste.com/c2792a2668 (rigol-snapshot now using TMC header)
<kerio> lol
<kerio> yay
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<DocScrutinizer05> need it for other raw data downloads, like :WAVeform:DATA?
<DocScrutinizer05> which can return arbitrary number of bytes
<DocScrutinizer05> (max 9999 per chink :-/ )
<DocScrutinizer05> >> The data returned contains 2 parts: the TMC data description header and the waveform data. The format of the TMC data description header is #900000dddd which is followed by the waveform data. Wherein, dddd denotes the number of bytes of the effective waveform data. <<
<DocScrutinizer05> seems when I want to download a 12MB buffer of wave data, I need to use a read loop that sets :WAVeform:STARt according to <number-of-bytes-already-read + 1>
<DocScrutinizer05> sidenote: I failed to teach dd to read in ${numofbytes##*(0)}, got weird results
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<DocScrutinizer05> another sidenote: storing waveform of a 12MB buffer to USB memstick in CSV format (results in ~130MB filesize) took 81 minutes on one memstick and 21 minutes on another more contemporary one (uSD adapter with 32GB uSD)
<DocScrutinizer05> Rigol must use blocksize=1
<DocScrutinizer05> and no fs buffers
<wpwrak> i suspect they may have a slow UART between CPU and the communication subsystem :)
<DocScrutinizer05> ok, max size for a :WAVeform:DATA? chunk seems ~200kBytes
<DocScrutinizer05> I.E send_cmd ':WAVeform:STAR 200001'; send_cmd ':WAVeform:STOP 400000';
<DocScrutinizer05> jr@saturn:~> rigol-waveform ':WAVeform:DATA?' xxx-stop400000-start200001
<DocScrutinizer05> magic: #; len: 9; bytes: 200000
<DocScrutinizer05> 300000 results in 0 length data chunk, due to empty "bytes: " TMC header value
<DocScrutinizer05> -rw-r--r-- 1 jr users 200000 4. Feb 17:54 xxx-stop200000
<DocScrutinizer05> -rw-r--r-- 1 jr users 200000 4. Feb 18:00 xxx-stop400000-start200001
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