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FMC DEL 1ns 4cha - Software
Commits
65244f77
Commit
65244f77
authored
May 05, 2012
by
Alessandro Rubini
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doc: added 'features' section, split bugs in three
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doc/fine-delay.in
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65244f77
...
...
@@ -76,6 +76,32 @@ in the documentation.
@node Driver Features
@chapter Driver Features
This driver is based on ZIO and @i{spec-sw}. It supports initial
setup of the board, setting and reading time, run-time continuos
calibration, input timestamping and output pulse generation. It has
support for user-defined offsets, so our users can tell the driver
about channel-specific delays (for example, to account for wiring) and
ignore the issue in application code.
For each feature offered the driver (and documentation) tries to offer:
@itemize @bullet
@item A description of how the features works at low level;
@item A low-level user-space program to test the actual mechanism;
@item A C-language API to access the feature with data structures;
@item An example program based on that API.
@end itemize
Sometimes the API and associated program is missing, lor lack of time.
This package is currently available from
@code{git://gnudd.com/fine-delay.git}, with snapshots on the ``Files''
and ``Documents'' tabs of the @code{ohwr} project for the related
hardware and gateware.
@c ##########################################################################
@node Installation
@chapter Installation
...
...
@@ -1161,16 +1187,39 @@ The following functions are offered
@
chapter
Known
Bugs
and
Missing
Features
This
package
is
still
work
in
progress
,
and
unfortunately
the
same
applies
to
the
packages
it
depends
on
.
The
current
package
set
(
i
.
e
.,
@
i
{
zio
},
@
i
{
spec
-
sw
}
and
this
one
)
has
applies
to
the
packages
it
depends
on
--
ZIO
and
@
i
{
spec
-
sw
}.
@
menu
*
Bugs
in
Related
Packages
::
*
Bugs
in
This
Package
::
*
Wish
List
::
@
end
menu
@
c
==========================================================================
@
node
Bugs
in
Related
Packages
@
section
Bugs
in
Related
Packaged
The
current
package
set
(
i
.
e
.,
@
i
{
zio
},
@
i
{
spec
-
sw
}
and
this
one
)
has
the
following
known
issues
exposed
by
@
i
{
fine
-
delay
}:
@
itemize
@
bullet
@
item
The
auto
-
loading
of
@
i
{
spec
}
submodules
is
not
really
working
:
the
@
i
{
modprobe
}
command
will
be
stuck
sleeping
if
you
try
to
use
it
.
Run
`@
code
{
insmod
spec
-
fine
-
delay
}
''
(
or
@
i
{
modprobe
}
by
hand
instead
.
@
item
The
@
i
{
user
}
trigger
of
ZIO
is
really
user
-
driven
,
so
the
driver
can
't push stuff to the buffer until asked to. Also, a related buglet
prevents to return data immediately when asked. This will be fixed,
but it currently results in the @i{read} function only returning one
sample, and an immediately-following non-blocking @i{read} will say
nothing is there, yet.
@end itemize
@c ==========================================================================
@node Bugs in This Package
@section Bugs in This Package
This is the list of known bugs and missing features over what hardware
allows:
...
...
@@ -1192,13 +1241,17 @@ the host computer.
@end itemize
@c ==========================================================================
@node Wish List
@section Wish List
Other less important issues may be dealt with over time, but are not
urgent as I write this:
@itemize
@item The driver should register its own ZIO trigger, or use the new
attribute
for
``
greedy
-
input
''
offer
ed
in
new
versions
of
ZIO
attribute for ``greedy-input''
plann
ed in new versions of ZIO
(thank you Federico). Currently there'
s
no
buffering
and
reading
is
a
little
slow
.
...
...
@@ -1210,7 +1263,6 @@ input sequence number.
@
end
itemize
@
c
##########################################################################
@
node
Troubleshooting
@
chapter
Troubleshooting
...
...
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