Re: [libgpiod][PATCH v3 09/14] bindings: cxx: add support for SET_CONFIG

[Bartosz Golaszewski <bgolaszewski@xxxxxxxxxxxx>]

pon., 25 lis 2019 o 15:33 Kent Gibson <warthog618@xxxxxxxxx> napisał(a):
>
> Add methods to support setting line configuration.
>
> Signed-off-by: Kent Gibson <warthog618@xxxxxxxxx>
> ---
>  bindings/cxx/gpiod.hpp     | 55 +++++++++++++++++++++++++
>  bindings/cxx/line.cpp      | 37 +++++++++++++++++
>  bindings/cxx/line_bulk.cpp | 83 ++++++++++++++++++++++++++++++++++++++
>  3 files changed, 175 insertions(+)
>
> diff --git a/bindings/cxx/gpiod.hpp b/bindings/cxx/gpiod.hpp
> index 2b1a6ab..dcae431 100644
> --- a/bindings/cxx/gpiod.hpp
> +++ b/bindings/cxx/gpiod.hpp
> @@ -381,6 +381,32 @@ public:
>          */
>         GPIOD_API void set_value(int val) const;
>
> +       /**
> +        * @brief Set configuration of this line.
> +        * @param direction New direction.
> +        * @param flags Replacement flags.
> +        * @param value New value (0 or 1) - only matters for OUTPUT direction.
> +        */
> +       GPIOD_API void set_config(int direction, ::std::bitset<32> flags,
> +                       int value = 0) const;

Please align this with the opening bracket. Same elsewhere.



> +
> +       /**
> +        * @brief Set configuration flags of this line.
> +        * @param flags Replacement flags.
> +        */
> +       GPIOD_API void set_flags(::std::bitset<32> flags) const;
> +
> +       /**
> +        * @brief Change the direction this line to input.
> +        */
> +       GPIOD_API void set_direction_input() const;
> +
> +       /**
> +        * @brief Change the direction this lines to output.
> +        * @param value New value (0 or 1).
> +        */
> +       GPIOD_API void set_direction_output(int value = 0) const;
> +
>         /**
>          * @brief Wait for an event on this line.
>          * @param timeout Time to wait before returning if no event occurred.
> @@ -648,6 +674,35 @@ public:
>          */
>         GPIOD_API void set_values(const ::std::vector<int>& values) const;
>
> +       /**
> +        * @brief Set configuration of all lines held by this object.
> +        * @param direction New direction.
> +        * @param flags Replacement flags.
> +        * @param values Vector of values to set. Must be the same size as the
> +        *        number of lines held by this line_bulk.
> +        *        Only relevant for output direction requests.
> +        */
> +       GPIOD_API void set_config(int direction, ::std::bitset<32> flags,
> +                       const ::std::vector<int> values = std::vector<int>()) const;
> +
> +       /**
> +        * @brief Set configuration flags of all lines held by this object.
> +        * @param flags Replacement flags.
> +        */
> +       GPIOD_API void set_flags(::std::bitset<32> flags) const;
> +
> +       /**
> +        * @brief Change the direction all lines held by this object to input.
> +        */
> +       GPIOD_API void set_direction_input() const;
> +
> +       /**
> +        * @brief Change the direction all lines held by this object to output.
> +        * @param values Vector of values to set. Must be the same size as the
> +        *        number of lines held by this line_bulk.
> +        */
> +       GPIOD_API void set_direction_output(const ::std::vector<int>& values) const;
> +
>         /**
>          * @brief Poll the set of lines for line events.
>          * @param timeout Number of nanoseconds to wait before returning an
> diff --git a/bindings/cxx/line.cpp b/bindings/cxx/line.cpp
> index dd6bb6a..a688b5d 100644
> --- a/bindings/cxx/line.cpp
> +++ b/bindings/cxx/line.cpp
> @@ -158,6 +158,43 @@ void line::set_value(int val) const
>         bulk.set_values({ val });
>  }
>
> +void line::set_config(int direction, ::std::bitset<32> flags,
> +                       int value) const
> +{
> +       this->throw_if_null();
> +
> +       line_bulk bulk({ *this });
> +
> +       bulk.set_config(direction, flags, { value });
> +}
> +
> +void line::set_flags(::std::bitset<32> flags) const
> +{
> +       this->throw_if_null();
> +
> +       line_bulk bulk({ *this });
> +
> +       bulk.set_flags(flags);
> +}
> +
> +void line::set_direction_input() const
> +{
> +       this->throw_if_null();
> +
> +       line_bulk bulk({ *this });
> +
> +       bulk.set_direction_input();
> +}
> +
> +void line::set_direction_output(int value) const
> +{
> +       this->throw_if_null();
> +
> +       line_bulk bulk({ *this });
> +
> +       bulk.set_direction_output({ value });
> +}
> +
>  bool line::event_wait(const ::std::chrono::nanoseconds& timeout) const
>  {
>         this->throw_if_null();
> diff --git a/bindings/cxx/line_bulk.cpp b/bindings/cxx/line_bulk.cpp
> index 5f1cac4..b8f5eb7 100644
> --- a/bindings/cxx/line_bulk.cpp
> +++ b/bindings/cxx/line_bulk.cpp
> @@ -176,6 +176,89 @@ void line_bulk::set_values(const ::std::vector<int>& values) const
>                                           "error setting GPIO line values");
>  }
>
> +void line_bulk::set_config(int direction, ::std::bitset<32> flags,
> +                          const ::std::vector<int> values) const
> +{
> +       this->throw_if_empty();
> +
> +       if (!values.empty() && this->_m_bulk.size() != values.size())
> +               throw ::std::invalid_argument("the number of default values must correspond with the number of lines");
> +
> +       ::gpiod_line_bulk bulk;
> +       int rv, gflags;
> +
> +       gflags = 0;
> +
> +       for (auto& it: reqflag_mapping) {
> +               if ((it.first & flags).to_ulong())
> +                       gflags |= it.second;
> +       }
> +
> +       this->to_line_bulk(::std::addressof(bulk));
> +
> +       rv = ::gpiod_line_set_config_bulk(::std::addressof(bulk), direction,
> +                                         gflags, values.data());
> +       if (rv)
> +               throw ::std::system_error(errno, ::std::system_category(),
> +                                         "error setting GPIO line config");
> +}
> +
> +void line_bulk::set_flags(::std::bitset<32> flags) const
> +{
> +       this->throw_if_empty();
> +
> +       ::gpiod_line_bulk bulk;
> +       int rv, gflags;
> +
> +       this->to_line_bulk(::std::addressof(bulk));
> +
> +       gflags = 0;
> +
> +       for (auto& it: reqflag_mapping) {
> +               if ((it.first & flags).to_ulong())
> +                       gflags |= it.second;
> +       }
> +
> +       rv = ::gpiod_line_set_flags_bulk(::std::addressof(bulk), gflags);
> +       if (rv)
> +               throw ::std::system_error(errno, ::std::system_category(),
> +                                         "error setting GPIO line flags");
> +}
> +
> +void line_bulk::set_direction_input() const
> +{
> +       this->throw_if_empty();
> +
> +       ::gpiod_line_bulk bulk;
> +       int rv;
> +
> +       this->to_line_bulk(::std::addressof(bulk));
> +
> +       rv = ::gpiod_line_set_direction_input_bulk(::std::addressof(bulk));
> +       if (rv)
> +               throw ::std::system_error(errno, ::std::system_category(),
> +                       "error setting GPIO line direction to input");
> +}
> +
> +void line_bulk::set_direction_output(const ::std::vector<int>& values) const
> +{
> +       this->throw_if_empty();
> +
> +       if (values.size() != this->_m_bulk.size())
> +               throw ::std::invalid_argument("the size of values array must correspond with the number of lines");
> +
> +       ::gpiod_line_bulk bulk;
> +       int rv;
> +
> +       this->to_line_bulk(::std::addressof(bulk));
> +
> +       rv = ::gpiod_line_set_direction_output_bulk(::std::addressof(bulk),
> +                                                   values.data());
> +       if (rv)
> +               throw ::std::system_error(errno, ::std::system_category(),
> +                       "error setting GPIO line direction to output");
> +}
> +
>  line_bulk line_bulk::event_wait(const ::std::chrono::nanoseconds& timeout) const
>  {
>         this->throw_if_empty();
> --
> 2.24.0
>