14 Mar
2023
14 Mar
'23
3:07 p.m.
Yes, I've used sigrok and sat on their IRC channel for quite a while.
I've used the gpib analyser and extended a DMM driver to cover the hp34401A.
The logic analyser client is probably the best application and is
comparable with Saleae's own client. The streaming cli clients are also
good, but I think the scope client is behind Zonenberg's glscopeclient.
Sigrok is generally pretty good but is suffering developer shortage at
present. The code quality is very good so this doesn't create a bug fixing
issue but it does mean some recent feature additions haven't made it to
the mainstream. If you (or anyone) has a taste for code reviewing I believe
you'd be very welcome to help.
I've also seen a recent patch to make it easier to use out-of-tree drivers
for this very reason. I don't know much about that but it's an op[tion if
you want to use the rasbperry pico as an acquisition engine.
Open source and cross-platform credentials are excellent : in fact this
causes a slight problem, as the Cypress FX3 which would otherwise be a
good candidate as an acquisition engine can only be shipped with
closed-source proprietary blobs, which stops it being used by sigrok.
Any errors in the above are my own..
On Tue, Mar 14, 2023 at 2:39 PM Paul Koning via cctalk <
cctalk(a)classiccmp.org> wrote:
On Mar 14, 2023, at 1:38 AM, Steve Lewis via
cctalk <
cctalk(a)classiccmp.org> wrote:
...
Anyway, as an option slightly cheaper than the Saleae, I'm trying the
32-channel version of the DreamSourceLab U3Pro32. It's not horrible,
I've
24 pins hooked up so far. I debated on if
2x16's would be better.
Amazon is good about returns, but this little DSL probe is good enough,
I'll be keeping it.
DreamSourceLab DSLogic U3Pro32 USB-Based Logic Analyzer with 1GHz
Sampling
Rate, 2Gbits Memory, USB 3.0 Interface, 32
Channels
Thanks everyone. Some reactions to what I heard:
The U3Pro32 happens to be what I was looking at when I spotted the link to
sigrok.org. (Does anyone here have experience with that software?)
Among other things, it has a long list of supported devices, a lot of logic
analyzers of various specs, many that look like the sort of low cost
choices I was looking for. I saw DreamSourceLab, Hantek, and a bunch of
others offering 32 bit wide analyzers.
On HP: yes, perhaps. I used one of those back at DEC, in the mid 1980s.
Nice machine, but my suspicion is that I'd run into the small memory
problem again that plagues me with the Philips/Fluke analyzer I use right
now.
I can see lots of 16 channel options including mixed oscilloscopes. That
doesn't work for what I need, because I have (a) a control interface (EPP
mode parallel port, so that's about 12-14 wires right there) plus the
resulting internal signals I want to see, plus a serial data link going the
other way. 32 channels is what I have right now and that's comfortable;
16 would mean a lot of fiddling around to keep switching which subset I can
see. Also, I have a Tek DAS602 so a new scope isn't all that appealing,
especially the lower cost ones (much less bandwidth, though admittedly more
memory) -- and while Rigol is less expensive than Tek it still has a fairly
substantial price tag.
I noticed the sigrok.org devices list mentions one that is open source
hardware, that sounds a bit like what Sytse was talking about.
paul