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Throughout UHD, we often do floating-point comparisons for frequency
ranges that require resilience to floating point rounding errors. Most
of the time the checks look like this:
```cpp
if (fp_compare_epsilon<double>(freq) > boundary) {
// ...
}
```
The exception is the N320 daughterboard control, which uses a custom
epsilon:
```cpp
if (fp_compare_epsilon<double>(freq,
RHODIUM_FREQ_COMPARE_EPSILON) > boundary) {
// ...
}
```
This was, for the most part, not by design, but because authors simply
didn't think about which epsilon value was appropriate for the frequency
comparison. This was complicated by the fact that fp_compare_epsilon
previously had some issues.
This patch introduces FREQ_COMPARE_EPSILON, which is a sensible default
value for fp_compare_epsilon when doing frequency comparisons (note that
fp_compare_delta already had such a value).
Also, it introduces freq_compare_epsilon(x), which is a shorthand for
fp_compare_epsilon<double>(x, FREQ_COMPARE_EPSILON).
We then replace all occurrences of fp_compare_epsilon<double> which are
specific to frequency checks with freq_compare_epsilon.
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Co-Authored-By: Alex Williams <alex.williams@ni.com>
Co-Authored-By: Sugandha Gupta <sugandha.gupta@ettus.com>
Co-Authored-By: Brent Stapleton <brent.stapleton@ettus.com>
Co-Authored-By: Ciro Nishiguchi <ciro.nishiguchi@ni.com>
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With the keywords "rx_gain_profile", "tx_gain_profile" and the new
values "default_bypass_always_off" and "default_bypass_always_on" the
customer can control whether the filter bypass shall be applied as
defined in the gain-table or whether to switch the bypass to ON or OFF
for all gains.
With the keywords "rx_band_map" and "tx_band_map" the user can define
custom frequency borders for the band mapping.
These new keywords can be used in the uhd.con, e.g.:
[type=n3xx]
rx_gain_profile=default_bypass_always_off
tx_gain_profile=default_bypass_always_on
rx_band_map=431e6;601e6;1051e6;1601e6;2101e6;2701e6
tx_band_map=723.18e6;1623.18e6;3323.18e6
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Applying formatting changes to all .cpp and .hpp files in the following
directories:
```
find host/examples/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/tests/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/lib/usrp/dboard/neon/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/lib/usrp/dboard/magnesium/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/lib/usrp/device3/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/lib/usrp/mpmd/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/lib/usrp/x300/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/utils/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find mpm/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
```
Also formatted host/include/, except Cpp03 was used as a the language
standard instead of Cpp11.
```
sed -i 's/ Cpp11/ Cpp03/g' .clang-format
find host/include/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
```
Formatting style was designated by the .clang-format file.
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All copyright is now attributed to "Ettus Research, a National
Instruments company".
SPDX headers were also updated to latest version 3.0.
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This removes the need to re-implement the band checks (in particular,
the low band check) in multiple places, potentially causing confusion.
Signed-off-by: Trung Tran <trung.tran@ettus.com>
Reviewed-by: Trung Tran <trung.tran@ettus.com>
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