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IN NO EVENT SHALL NORDIC SEMICONDUCTOR ASA OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * */ #ifndef NRF_CSENSE_H__ #define NRF_CSENSE_H__ #include #include "nrf.h" #include "sdk_errors.h" #include "app_timer.h" #include "nrf_drv_csense.h" #include "nrf_csense_macros.h" #include "app_util.h" /** @file * * @defgroup nrf_csense Capacitive sensor library * @{ * @ingroup app_common * * @brief Module for using the capacitive sensor library with support for many instances of sliders, wheels, and buttons. */ /** * @brief Macro for returning the address of a variable. */ #define NRF_CSENSE_GET_INSTANCE_ID(instance) (&instance) /** * @brief Statically allocate memory for the instance of a capacitive sensor. * * @param[in,out] name Name of the capacitive sensor instance that will be created. * @param[in] p1 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). */ #define NRF_CSENSE_BUTTON_DEF(name, p1) NRF_CSENSE_INTERNAL_BUTTON_DEF(name, p1) /** * @brief Macro for creating a 2-pad slider instance. * * @param[in,out] name Name of the capacitive sensor instance that will be created. * @param[in] steps_no Number of relative pads. It means that the slider in its handler will give values (1, steps_no). * @param[in] p1 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p2 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). */ #define NRF_CSENSE_SLIDER_2_DEF(name, steps_no, p1, p2) NRF_CSENSE_INTERNAL_SLIDER_2_DEF(name, steps_no, p1, p2) /** * @brief Macro for creating a 3-pad slider instance. * * @param[in,out] name Name of the capacitive sensor instance that will be created. * @param[in] steps_no Number of relative pads. It means that the slider in its handler will give values (1, steps_no). * @param[in] p1 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p2 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p3 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). */ #define NRF_CSENSE_SLIDER_3_DEF(name, steps_no, p1, p2, p3) NRF_CSENSE_INTERNAL_SLIDER_3_DEF(name, steps_no, p1, p2, p3) /** * @brief Macro for creating a 4-pad slider instance. * * @param[in,out] name Name of the capacitive sensor instance that will be created. * @param[in] steps_no Number of relative pads. It means that the slider in its handler will give values (1, steps_no). * @param[in] p1 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p2 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p3 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p4 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). */ #define NRF_CSENSE_SLIDER_4_DEF(name, steps_no, p1, p2, p3, p4) NRF_CSENSE_INTERNAL_SLIDER_4_DEF(name, steps_no, p1, p2, p3, p4) /** * @brief Macro for creating a 5-pad slider instance. * * @param[in,out] name Name of the capacitive sensor instance that will be created. * @param[in] steps_no Number of relative pads. It means that the slider in its handler will give values (1, steps_no). * @param[in] p1 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p2 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p3 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p4 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p5 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). */ #define NRF_CSENSE_SLIDER_5_DEF(name, steps_no, p1, p2, p3, p4, p5) NRF_CSENSE_INTERNAL_SLIDER_5_DEF(name, steps_no, p1, p2, p3, p4, p5) /** * @brief Macro for creating a 3-pad wheel instance. * * @param[in,out] name Name of the capacitive sensor instance that will be created. * @param[in] steps_no Number of relative pads. It means that the slider in its handler will give values (1, steps_no). * @param[in] p1 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p2 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p3 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). */ #define NRF_CSENSE_WHEEL_3_DEF(name, steps_no, p1, p2, p3) NRF_CSENSE_INTERNAL_WHEEL_3_DEF(name, steps_no, p1, p2, p3) /** * @brief Macro for creating a 4-pad wheel instance. * * @param[in,out] name Name of the capacitive sensor instance that will be created. * @param[in] steps_no Number of relative pads. It means that the slider in its handler will give values (1, steps_no). * @param[in] p1 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p2 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p3 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p4 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). */ #define NRF_CSENSE_WHEEL_4_DEF(name, steps_no, p1, p2, p3, p4) NRF_CSENSE_INTERNAL_WHEEL_4_DEF(name, steps_no, p1, p2, p3, p4) /** * @brief Macro for creating a 5-pad wheel instance. * * @param[in,out] name Name of the capacitive sensor instance that will be created. * @param[in] steps_no Number of relative pads. It means that the slider in its handler will give values (1, steps_no). * @param[in] p1 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p2 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p3 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p4 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). * @param[in] p5 Pair of two arguments: threshold and analog_input_number. Must be passed as (analog_input_number, threshold). */ #define NRF_CSENSE_WHEEL_5_DEF(name, steps_no, p1, p2, p3, p4, p5) NRF_CSENSE_INTERNAL_WHEEL_5_DEF(name, steps_no, p1, p2, p3, p4, p5) /** * @cond (NODOX) * @defgroup nrf_csense_internal Auxiliary internal types declarations * @brief Module for internal usage inside the library only. * @details These definitions are available to the user, but they should not * be accessed directly. Use the API to access them. * @{ * */ /* * @brief Forward declaration of capacitive sensor instance. */ typedef struct nrf_csense_instance_s nrf_csense_instance_t; /* * @brief Forward declaration of a capacitive sensor pad. */ typedef struct nrf_csense_pad_s nrf_csense_pad_t; /** * @brief Structure with pointer to min and max values measured on pads. */ typedef struct { uint16_t max_value; //!< Max value measured on pads. uint16_t min_value; //!< Min value measured on pads. }nrf_csense_min_max_t; /** * @brief Structure with single instance parameters. This can be either a slider or a button. */ struct nrf_csense_instance_s { nrf_csense_instance_t * p_next_instance; //!< Pointer to the next instance. nrf_csense_pad_t * p_nrf_csense_pad; //!< Pointer to the first pad of the module. nrf_csense_min_max_t * min_max; //!< Structure with pointers to min and max values measured on pads. uint16_t steps; //!< Number of relative pads. It means that the slider in its handler will give values (1, steps_no). uint8_t number_of_pads; //!< Number of pads that the instance is using. bool is_active; //!< Flag to indicate if the instance is active. bool is_touched; //!< Flag to indicate if the instance is touched. void * p_context; //!< General purpose pointer. }; /* Structure with single pad parameters used for initialization. */ struct nrf_csense_pad_s { nrf_csense_pad_t * p_next_pad; //!< Pointer to the next pad. uint16_t threshold; //!< Threshold voltage on pad/time of charging to decide if the pad was touched. uint8_t pad_index; //!< Index of the pad. uint8_t analog_input_number; //!< Analog input connected to the pad. }; /** @} * @endcond */ /** * @brief Enum for nrf_csense events. */ typedef enum { NRF_CSENSE_BTN_EVT_PRESSED, //!< Event for pad pressed. NRF_CSENSE_BTN_EVT_RELEASED, //!< Event for pad released. NRF_CSENSE_SLIDER_EVT_PRESSED, //!< Event for pad pressed. NRF_CSENSE_SLIDER_EVT_RELEASED, //!< Event for pad released. NRF_CSENSE_SLIDER_EVT_DRAGGED, //!< Event for pad dragged. }nrf_csense_evt_type_t; /** * @brief Structure with slider event data including the measured step. */ typedef struct { uint16_t step; //!< Measured step. } nrf_csense_slider_evt_t; /** * @brief Event data union for nrf_csense events. */ typedef union { nrf_csense_slider_evt_t slider; //!< Structure with slider event data including the measured step. } nrf_csense_evt_param_t; /** * @brief Structure with event parameters. */ typedef struct { nrf_csense_evt_type_t nrf_csense_evt_type; //!< Type of event. nrf_csense_instance_t * p_instance; //!< Pointer to instance. nrf_csense_evt_param_t params; //!< Event data union for nrf_csense events. }nrf_csense_evt_t; /** * @brief Capacitive sensor handler type. */ typedef void (* nrf_csense_event_handler_t)(nrf_csense_evt_t * p_evt); /** * @brief Function for setting a handler of the instance. * * @param [in] p_instance Pointer to the instance whose steps are going to be changed. * @param [in] p_context General purpose pointer. Will be passed to the callback function. */ __STATIC_INLINE void nrf_csense_instance_context_set(nrf_csense_instance_t * const p_instance, void * p_context) { p_instance->p_context = p_context; } /** * @brief Function for initializing the module. After initialization, no instances are enabled. * * @param [in] event_handler Event handler for the Capacitive Sensor module. * @param [in] ticks Time in app_timer ticks between next conversions. * * @retval NRF_ERROR_INVALID_PARAM If invalid parameter was provided. * @retval NRF_ERROR_INVALID_STATE If one of the used modules is in invalid state. * @retval NRF_ERROR_INTERNAL If an error occured while initializing one of the modules used by the capacitive sensor library. * @retval NRF_SUCCESS If the module was initialized successfully. */ ret_code_t nrf_csense_init(nrf_csense_event_handler_t event_handler, uint32_t ticks); /** * @brief Function for uninitializing the module. * * @return Values returned by @ref nrf_drv_csense_uninit and @ref app_timer_stop. */ ret_code_t nrf_csense_uninit(void); /** * @brief Function for adding an instance of capacitive sensor to a linked list. * * The function calls @ref nrf_csense_enable to enable the instance that was added to the linked list. * * @param [in] p_instance Pointer to the capacitive sensor instance. It is saved by the module and is used whenever the instance is referred. * * @return Values returned by @ref nrf_csense_enable. */ ret_code_t nrf_csense_add(nrf_csense_instance_t * const p_instance); /** * @brief Function for enabling a single instance. * * @param [in,out] p_instance Pointer to the capacitive sensor instance. It is saved by the module and is used whenever the instance is referred. * * @return Values returned by @ref app_timer_start. */ ret_code_t nrf_csense_enable(nrf_csense_instance_t * const p_instance); /** * @brief Function for disabling an instance. * * @param [in] p_instance Pointer to the instance to be disabled. * * @retval NRF_ERROR_INVALID_PARAM If the instance was already disabled. * @retval NRF_SUCCESS If the instance was disabled successfully. */ ret_code_t nrf_csense_disable(nrf_csense_instance_t * const p_instance); /** * @brief Function for setting ticks between next measurements. * * @param [in] ticks New time between conversions in app_timer ticks. * * @retval NRF_ERROR_BUSY If the capacitive sensor was busy. * @retval NRF_ERROR_INVALID_PARAM If an invalid parameter was provided. * @retval NRF_ERROR_INVALID_STATE If app_timer was in invalid state. * @retval NRF_SUCCESS If ticks were set successfully. */ ret_code_t nrf_csense_ticks_set(uint32_t ticks); /** * @brief Function for setting steps of an instance. * * Note that you have do disable the instance before you can change its number of steps. * * @param [in] p_instance Pointer to the instance whose steps are going to be changed. * @param [in] steps New steps value. * * @retval NRF_ERROR_BUSY If the capacitive sensor was busy. * @retval NRF_SUCCESS If steps were set successfully. */ ret_code_t nrf_csense_steps_set(nrf_csense_instance_t * const p_instance, uint16_t steps); /** @} */ #endif //NRF_CSENSE_H__