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This software, with or without modification, must only be used with a * Nordic Semiconductor ASA integrated circuit. * * 5. Any software provided in binary form under this license must not be reverse * engineered, decompiled, modified and/or disassembled. * * THIS SOFTWARE IS PROVIDED BY NORDIC SEMICONDUCTOR ASA "AS IS" AND ANY EXPRESS * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY, NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. 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 NRFX_QDEC_H__ #define NRFX_QDEC_H__ #include #include #ifdef __cplusplus extern "C" { #endif /** * @defgroup nrfx_qdec QDEC driver * @{ * @ingroup nrf_qdec * @brief Quadrature Decoder (QDEC) peripheral driver. */ /**@brief QDEC configuration structure.*/ typedef struct { nrf_qdec_reportper_t reportper; /**< Report period in samples. */ nrf_qdec_sampleper_t sampleper; /**< Sampling period in microseconds. */ uint32_t psela; /**< Pin number for A input. */ uint32_t pselb; /**< Pin number for B input. */ uint32_t pselled; /**< Pin number for LED output. */ uint32_t ledpre; /**< Time (in microseconds) how long LED is switched on before sampling. */ nrf_qdec_ledpol_t ledpol; /**< Active LED polarity. */ bool dbfen; /**< State of debouncing filter. */ bool sample_inten; /**< Enabling sample ready interrupt. */ uint8_t interrupt_priority; /**< QDEC interrupt priority. */ } nrfx_qdec_config_t; /**@brief QDEC default configuration. */ #define NRFX_QDEC_DEFAULT_CONFIG \ { \ .reportper = (nrf_qdec_reportper_t)NRFX_QDEC_CONFIG_REPORTPER, \ .sampleper = (nrf_qdec_sampleper_t)NRFX_QDEC_CONFIG_SAMPLEPER, \ .psela = NRFX_QDEC_CONFIG_PIO_A, \ .pselb = NRFX_QDEC_CONFIG_PIO_B, \ .pselled = NRFX_QDEC_CONFIG_PIO_LED, \ .ledpre = NRFX_QDEC_CONFIG_LEDPRE, \ .ledpol = (nrf_qdec_ledpol_t)NRFX_QDEC_CONFIG_LEDPOL, \ .interrupt_priority = NRFX_QDEC_CONFIG_IRQ_PRIORITY, \ .dbfen = NRFX_QDEC_CONFIG_DBFEN, \ .sample_inten = NRFX_QDEC_CONFIG_SAMPLE_INTEN \ } /**@brief QDEC sample event data.*/ typedef struct { int8_t value; /**< Sample value. */ } nrfx_qdec_sample_data_evt_t; /**@brief QDEC report event data.*/ typedef struct { int16_t acc; /**< Accumulated transitions. */ uint16_t accdbl; /**< Accumulated double transitions. */ } nrfx_qdec_report_data_evt_t; /**@brief QDEC event handler structure. */ typedef struct { nrf_qdec_event_t type; union { nrfx_qdec_sample_data_evt_t sample; /**< Sample event data. */ nrfx_qdec_report_data_evt_t report; /**< Report event data. */ } data; } nrfx_qdec_event_t; /**@brief QDEC event handler. * @param[in] event QDEC event structure. */ typedef void (*nrfx_qdec_event_handler_t)(nrfx_qdec_event_t event); /**@brief Function for initializing QDEC. * * @param[in] p_config Pointer to the structure with initial configuration. * @param[in] event_handler Event handler provided by the user. * Must not be NULL. * * @retval NRFX_SUCCESS If initialization was successful. * @retval NRFX_ERROR_INVALID_STATE If QDEC was already initialized. */ nrfx_err_t nrfx_qdec_init(nrfx_qdec_config_t const * p_config, nrfx_qdec_event_handler_t event_handler); /**@brief Function for uninitializing QDEC. * @note Function asserts if module is uninitialized. */ void nrfx_qdec_uninit(void); /**@brief Function for enabling QDEC. * @note Function asserts if module is uninitialized or enabled. */ void nrfx_qdec_enable(void); /**@brief Function for disabling QDEC. * @note Function asserts if module is uninitialized or disabled. */ void nrfx_qdec_disable(void); /**@brief Function for reading accumulated transitions QDEC. * @note Function asserts if module is not enabled. * @note Accumulators are cleared after reading. * * @param[out] p_acc Pointer to store accumulated transitions. * @param[out] p_accdbl Pointer to store accumulated double transitions. */ void nrfx_qdec_accumulators_read(int16_t * p_acc, int16_t * p_accdbl); /** * @brief Function for returning the address of a specific QDEC task. * * @param task QDEC task. * * @return Task address. */ __STATIC_INLINE uint32_t nrfx_qdec_task_address_get(nrf_qdec_task_t task) { return (uint32_t)nrf_qdec_task_address_get(task); } /** * @brief Function for returning the address of a specific QDEC event. * * @param event QDEC event. * * @return Event address. */ __STATIC_INLINE uint32_t nrfx_qdec_event_address_get(nrf_qdec_event_t event) { return (uint32_t)nrf_qdec_event_address_get(event); } void nrfx_qdec_irq_handler(void); /** @} */ #ifdef __cplusplus } #endif #endif // NRFX_QDEC_H__