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[scopehal-apps] azonenberg 2837199 - Filter graph editor now allows dragging from a block's input to empty space, enabling new channels in the process. See #161.
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<t4nk_freenode>
johnsel, are you still around?
<t4nk_freenode>
meanwhile I've gotten myself an fx3 dev board ;)
<t4nk_freenode>
had quite a bit of chagrin, it doesn't play nice with my usb ports, but somehow it's working stably at the moment
<t4nk_freenode>
and I like it a lot, throughput is 'awesome' from what I was used to
<d1b2>
<johnsel> I sure am, but I have an important health call in 45mins. We can chat after though
<t4nk_freenode>
k man, I think I'll be around for a couple of hours yet, don't let me keep you from important stuff
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<d1b2>
<johnsel> Back
<d1b2>
<johnsel> t4nk_freenode: if you’re still here
<t4nk_freenode>
hi, yeah, I am ;)
<t4nk_freenode>
I was just trying to make sense of crc calculation :|
<t4nk_freenode>
I have this recording device that has an sd card slot
<t4nk_freenode>
I've set things up so I can attach a logic analyzer
<t4nk_freenode>
I'd like to emulate an sd card so that I can store songs straight to my hd via usb ;)
<t4nk_freenode>
weren't you the one who mentioned the rpi pico to me too? I've also got a couple of those now
<t4nk_freenode>
there's only about 150k of data on a freshly formatted sd for the device with an empty song, so I was hoping to be able to get that working from a pico alone
<t4nk_freenode>
and afterwards routing it to my pc via an fx2 board
<d1b2>
<johnsel> I very well might have, I probably said it has a similar feature to the TI AM335x that made the beaglelogic possible, the PRU
<t4nk_freenode>
yeah
<t4nk_freenode>
I found that very interesting ;)
<d1b2>
<johnsel> it is quite interesting as it gives the little bugger some quite high speed capability compared to it's cores and certainly compared to the costs
<t4nk_freenode>
been using sig_rok to capture some data. while it's nice to get somewhat of an overview, I find it very frustrating to do something useful with it I must say
<d1b2>
<johnsel> yes sigrok is quite annoying to work with
<d1b2>
<johnsel> that's why I ended up here in first place 🙂
<t4nk_freenode>
yeah, stm32f411 has 100Mhz i/o, but very little flash and mem
<t4nk_freenode>
the protocol decoder gives a good idea of the commands being sent, but the data is completely invisible as is
<t4nk_freenode>
and it seems impossible to save it, or save some selections
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<d1b2>
<johnsel> you've picked yourself quite a difficult task then
<t4nk_freenode>
heh, and I don't know if it's because I'm capturing a lot of data... but everything is slow like mad
<t4nk_freenode>
sd decoder is bad, but adding timing makes it unusable really
<t4nk_freenode>
yeah, I don't know how things will pan out, but I'm pretty hopeful about it
<t4nk_freenode>
lol, but I ran into this crc7-thing which I don't yet fully understand :)
<t4nk_freenode>
still reading up though
<d1b2>
<johnsel> why not use scopehal instead?
<d1b2>
<johnsel> it has SD data decoders
<t4nk_freenode>
well, all I have to work with is some fx2 boards, and the fx3, I don't think any of that has yet been implemented
<d1b2>
<johnsel> is it not doable for yourself?
<t4nk_freenode>
signal clock runs @16Mhz I think, so fx2 isn't really comfortable to use
<t4nk_freenode>
that would be a whole nother project I think, lol, and I'm facing limited mental capabilities as is :))
<d1b2>
<johnsel> hmm, well do you know the clock? A quick google says it can be up to 25mhz
<t4nk_freenode>
yeah, I think it runs @16Mhz, and the fx2 is supposed to go up to 24MHz, but I wouldn't count on that flying entirely
<t4nk_freenode>
and you'd want some more overhead for comfort too
<t4nk_freenode>
the fx la I have as a product is really badly constructed, it will crash to the touch
<t4nk_freenode>
I have some dev boards I could connect, they're a bit better
<t4nk_freenode>
but I don't even see a way to easily compare captured data from fx2 and fx3 with SR
<d1b2>
<20goto10> libscopeexports.{so,dll} is missing from the GitHub Actions export on Windows and Linux (haven't tried OSX). I can add an issue later and a PR if I get time
<azonenberg>
t4nk_freenode: we have two decodes, one for SD command and another for data
<azonenberg>
command only looks at the command line, data looks at the whole parallel bus
<azonenberg>
(in scopehal)
<azonenberg>
20goto10: This is only a short term issue as scopeexports is a component of glscopeclient which is scheduled to be discontinued
<azonenberg>
that same functionality is going to get folded into ngscopeclient in the near future
<azonenberg>
Limited dev resources have made this take longer than planned
<azonenberg>
There's also a few... not exactly bugs, but awkward UI quirks that can easily lead to incorrect exports... in the CSV exporter now so i wanted to rewrite it anyway
<t4nk_freenode>
([ 59%] Building CXX object lib/scopeprotocols/CMakeFiles/scopeprotocols.dir/SDCmdDecoder.cpp.o)
<t4nk_freenode>
:b
<t4nk_freenode>
ngscopeclient just crashed my pc ;)
<t4nk_freenode>
after rebooting, ngscopeclient will segfault immediately; it seems there's probable still the old issues with VulkanWindow.cpp, see if I can find them
<azonenberg>
t4nk_freenode: if your whole system crashed before it even got to the point of displaying a waveform, we can rule out any bugs in the rendering shaders
<azonenberg>
i'd suspect gpu driver bugs at that point
<azonenberg>
are you running recent drivers?
<t4nk_freenode>
I guess so, amdgpu, kernel 6.1.11
<t4nk_freenode>
(but there may have been some usb stuff causing the crash)
<azonenberg>
ah ok
<t4nk_freenode>
after the reboot there's a segfault immediately
<azonenberg>
well, let me know what you find. I strongly recommend having the vulkan validation layers active when tracking down possible vulkan issues
<azonenberg>
it's extremely helpful
<t4nk_freenode>
azonenberg, apart from that.... should I get it to run.. could I import a csv file that's been exported from pulseview?
<t4nk_freenode>
I'm talking 3G in size
<azonenberg>
You can import CSVs, it expects a single header row w/ channel names names
<azonenberg>
then leftmost column as time in seconds
<azonenberg>
then values in subsequent columns
<azonenberg>
i've imported gigabyte sized CSVs in the past without issue, although it's slow
<t4nk_freenode>
if only I could edit the capture in PV, then I could cut out a whole bunch of unnecessary 'data'
<azonenberg>
the hard cap right now is 4GB per memory allocation in Vulkan, which means max waveform size is 1G points for uniformly sampled float32 or 4G for uniformly sampled digital, or 512M points for sparse sampling