We should have been doing this all along, but we get away with it
on Linux where libusb can do everything with fds, and we get away
with it for many drivers that have a short timeout on their events.
On Windows though, handling this correctly is essential.
Fixes bug #343.
This temporarily reverts commit 421bc3eba0.
We cannot yet use the sr_config_*() wrappers, otherwise loading *.sr
files is broken. A fix is being worked on.
This is a partial fix for bug #343, which lead to a large amount of
handles being created, and eventually to a frontend "hang".
It's not yet a "full" fix as some issues are still observable,
but it successfully improves the situation on Windows to the extent
that frontend hangs due to large amounts of handles no longer seem
to happen.
Thanks to Boris Gjenero <boris.gjenero@gmail.com> for the debugging
efforts, testing, and updating of this patch!
Additionally, this seems to also fix a "SysClk LWLA hanging" bug
and apparently not receiving any samples during an acquisition
(tested on an LWLA1034).
This closes bug #328.
Tested on an MSO1104Z with firmware 00.04.02.SP4.
The analog channels are captured correctly. For the MSO series, with digital
channels, there are two outstanding issues:
1. Logic data is retrieved per-channel, one byte per sample, with the value
in the LSB of each byte. The current datafeed logic format doesn't allow
this format to be passed on directly. I suggest we resolve that rather than
making the driver buffer and interleave the data.
As stands, the code will retrieve data for all channels and pass it onto
the datafeed with unitsize=1. Channel D0 can used correctly if selected
alone. For other channels, data is passed to the frontend but the API does
not provide a way to associate it with the correct channel.
2. Channels CH3 and CH4 are multiplexed with D0-7 and D8-15 respectively, so
enabling these is mutually exclusive. We don't currently have a way to
express this constraint to the frontend.
This patchset was originally done by eightdot <gituser@eightdot.eu> by
manually forward-porting parts of the changes done by Bert Vermeulen (see
previous commits), but then heavily modified by Uwe Hermann to be based on
top off the (git-)rebased patches from Bert Vermeulen instead.
Note: This initial DSLogic code is *not* yet in a working or usable
state. It should be considered as a basis for further work only, for now.
Uwe Hermann
Martin Ling
Mike Walters
Bartosz Golaszewski
eightdot
Bert Vermeulen