Fix the bare minumum of whitespace/indentation/coding-style via
automatic 'indent' run, followed by some minor manual fixes.
Some more fixes and cleanups might follow later.
Bring back the original (C) lines from before the split into api.c
and protocol.[ch].
Add "Copyright (C) 2013 Lior Elazary <lelazary@yahoo.com>" since there
were nontrivial changes to those files.
This is a very simple gnuplot script for testing the Rigol DS1xx2 driver.
It currently has various issues and limitations (e.g. only one channel
is displayed, the scaling is not usable, and so on) to be fixed later.
Since we are using the 'hw' interface of ALSA, we don't have the luxury of
samplerate conversion, given by the 'plughw' interface. If we try to set a
samplerate that is not supported, ALSA will just throw an error.
We can test for the supported samplerates, and create a list of supported
samplerates, then limit the selection to only those values. The frontend can
query the list of supported samplerates.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
The alsa driver requested signed 16-bit integers from ALSA, but casted them to
to an unsigned 16bit before finally casting them to a float. The end result was
that half of the wave would be clipped off.
We also requested data in little endian format. ALSA can be instructed to send
data with the correct endianness for the platform, without needing to worry
about what that is.
This patch attempts three points, which, together, fix the acquisition:
1) Request data from ALSA without specifying endianness; ALSA will handle the
endianness.
2) Simplify the int16_t to float loop by using straightforward indexes.
3) Normalize every value before sending it on the session bus.
NOTE: If testing with PulseView, it will appear as if sigrok is sending all
zeroes. sigrok is sending correct data, but since the data is normalized,
PulseView will incorrectly plot it as a straight line.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
The alsa driver only works with device "default". This limits the driver's
scope to whatever device ALSA deems to be "default". It is desirable to have
access to all ALSA devices from sigrok.
Change the alsa device scan so that:
Each alsa device (not alsa card) gets its own sigrok device
For example,
hw:1,0 == sigrok device 0
hw:1,1 == sigrok device 1
hw:2,0 == sigrok device 2
hw:2,1 == sigrok device 3
hw:2,2 == sigrok device 4
[...]
We don't currently look at alsa subdevices. We only use subdevice 0.
Every input device will have its own channels (left, right, etc). Each of
those channels gets mapped to a different sigrok probe. A device with 4
channels will have 4 probes from sigrok's perspective.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
snd_pcm_hw_params_set_rate_near() will try to use the samplerate closest to the
given value, potentially starting the acquisition with a different samplerate
than the one specified.
Instead, use snd_pcm_hw_params_set_rate(). It will return an error if the
samplerate is not supported by the hardware, which is arguably better than
collecting data with a different samplerate than the one specified.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
asix-sigma.c:648:9: warning: 'ret' may be used uninitialized in this
function [-Wmaybe-uninitialized]
asix-sigma.c:1337:20: warning: 'triggerselect' may be used uninitialized
in this function [-Wmaybe-uninitialized]
Don't override/overwrite CFLAGS in configure.ac, but rather amend it
with (currently) "-Wall -Wextra -fvisibility=hidden".
This properly allows users/packagers to do things like:
./configure (this will default to using "-g -O2" additionally)
CFLAGS="-g -O2" ./configure (same as above)
CFLAGS="" ./configure (no additional flags)
CFLAGS="-g -O0" ./configure (disable optimization, e.g. for valgrind use)
etc. etc.
This matches the _ser suffix of the other functions/variables for this
device ("ser" denotes that it is used with the serial UNI-T UT-D02 cable
as opposed the USB/HID based cables which are handled by the uni-t-dmm driver).
But more importantly, the _SER suffix for the enum value will prevent
name clashes later, when the uni-t-dmm driver gets a VOLTCRAFT_VC820 enum.
Do the same for VOLTCRAFT_VC840.
Bert Vermeulen
Alexandru Gagniuc
Uwe Hermann
lelazary
Martin Ling