/** * Copyright (c) 2017 - 2020, Nordic Semiconductor ASA * * All rights reserved. * * Redistribution and use in source and binary forms, with or without modification, * are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this * list of conditions and the following disclaimer. * * 2. Redistributions in binary form, except as embedded into a Nordic * Semiconductor ASA integrated circuit in a product or a software update for * such product, must reproduce the above copyright notice, this list of * conditions and the following disclaimer in the documentation and/or other * materials provided with the distribution. * * 3. Neither the name of Nordic Semiconductor ASA nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * 4. 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 BH1745_H #define BH1745_H #include "nrf_twi_sensor.h" #include "bh1745_internal.h" #ifdef __cplusplus extern "C" { #endif /** * @brief Possible sensor addresses. */ #define BH1745_BASE_ADDRESS_LOW 0x38U #define BH1745_BASE_ADDRESS_HIGH 0x39U // Minimum nrf_twi_sensor message buffer size and nrf_twi_mngr queue length. #define BH1745_MIN_QUEUE_SIZE 5 /** * @brief Sensor driver usage. * * Sensor instance has to be defined first in global context using @ref BH1745_INSTANCE DEF. * After that it has to be initialized using @ref bh1745_init. * At this point sensor instance is ready and all other functions can be used. * * Configuration functions schedule TWI operation using @ref nrf_twi_sensor module. * After calling function, setting will be automatically send to sensor when TWI bus is free. * * There are designated functions to read status sensor registers e.g. @ref bh1745_sys_ctrl_read * As parameters they receive function to be called after register is read, and pointer where * register value should be stored. From that value specific parameters can be extracted * using @ref NRF_TWI_SENSOR_REG_VAL_GET macro. * Example: * uint8_t part_id = NRF_TWI_SENSOR_REG_VAL_GET(sys_ctrl_reg, * BH1745_PART_ID_MASK, * BH1745_PART_ID_POS); * * Other functions are self-explanatory or have description on their usage. */ /** * @brief Measurement time. */ typedef enum { BH1745_MEAS_TIME_160MS, BH1745_MEAS_TIME_320MS, BH1745_MEAS_TIME_640MS, BH1745_MEAS_TIME_1280MS, BH1745_MEAS_TIME_2560MS, BH1745_MEAS_TIME_5120MS } bh1745_meas_time_t; /** * @brief RGBC (red, green, blue, clear) gain setting. */ typedef enum { BH1745_GAIN_1X, BH1745_GAIN_2X, BH1745_GAIN_16X } bh1745_gain_t; /** * @brief Persistence settings. */ typedef enum { BH1745_TOGGLE_EACH_MEASURE, BH1745_UPDATE_EACH_MEASURE, BH1745_UPDATE_EVERY_FOURTH, BH1745_UPDATE_EVERY_EIGHTH } bh1745_persistence_t; /** * @brief Interrupt source settings. */ typedef enum { BH1745_RED_CHANNEL, BH1745_GREEN_CHANNEL, BH1745_BLUE_CHANNEL, BH1745_CLEAR_CHANNEL } bh1745_int_source_t; /** * @brief Measurement result. */ typedef struct { uint16_t red; //!< Raw red color value. uint16_t green; //!< Raw green color value. uint16_t blue; //!< Raw blue color value. uint16_t clear; //!< Raw clear color pass value. uint8_t valid; //!< Mode control 2 register value, used for checking data validity. } bh1745_data_t; /** * @brief RGBC data callback prototype. * * @param result Result of operation (NRF_SUCCESS on success, * otherwise a relevant error code). * @param[in] p_user_data Pointer to color data structure. */ typedef void (* bh1745_data_callback_t)(ret_code_t result, bh1745_data_t * p_user_data); /** * @brief Macro that creates sensor instance. * * @param[in] _bh1745_inst_name Sensor instance name. * @param[in] _p_twi_sensor Pointer to common TWI sensor instance. @ref NRF_TWI_SENSOR_DEF * @param[in] _sensor_address Sensor base address. */ #define BH1745_INSTANCE_DEF(_bh1745_inst_name, _p_twi_sensor, _sensor_address) \ BH1745_INTERNAL_INSTANCE_DEF(_bh1745_inst_name, _p_twi_sensor, _sensor_address) /** * @brief Function for initializing the BH1745 sensor instance. * * TWI manager queue length has to be at least BH1745_MIN_QUEUE_SIZE. * * @param[in] p_instance Pointer to the sensor instance. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t bh1745_init(bh1745_instance_t * p_instance); /** * @brief Function for resetting the BH1745 registers. * * @param[in] p_instance Pointer to the sensor instance. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t bh1745_sw_reset(bh1745_instance_t * p_instance); /** * @brief Function for resetting the interrupt. * * @param[in] p_instance Pointer to the sensor instance. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t bh1745_int_reset(bh1745_instance_t * p_instance); /** * @brief Function for setting measurement configuration. * * @param[in] p_instance Pointer to the sensor instance. * @param[in] meas_time Measurement time. * @param[in] enable Enable RGBC measurements. * @param[in] gain Measurement gain. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t bh1745_meas_cfg(bh1745_instance_t * p_instance, bh1745_meas_time_t meas_time, bool enable, bh1745_gain_t gain); /** * @brief Function for setting interrupt configuration. * * @param p_instance Pointer to sensor instance. * @param latch INT pin latch. * @arg false INT pin is latched until INTERRUPT register is read or initialized. * @arg true INT pin is updated after each measurement. * @param source Interrupt source. * @param enable Enable INT pin. * @param persistence Set persistence. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t bh1745_int_cfg(bh1745_instance_t * p_instance, bool latch, bh1745_int_source_t source, bool enable, bh1745_persistence_t persistance); /** * @brief Function for setting high interrupt threshold. * * @param[in] p_instance Pointer to sensor instance. * @param[in] threshold Threshold value. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t bh1745_high_thr_set(bh1745_instance_t * p_instance, uint16_t threshold); /** * @brief Function for setting low interrupt threshold. * * @param[in] p_instance Pointer to sensor instance. * @param[in] threshold Threshold value. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_write */ ret_code_t bh1745_low_thr_set(bh1745_instance_t * p_instance, uint16_t threshold); /** * @brief Function for getting the BH1745 data. * * @param[in] p_instance Pointer to the sensor instance. * @param[in] user_callback Callback function created by user. * @param[out] p_data The measurement results. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ ret_code_t bh1745_data_read(bh1745_instance_t * p_instance, bh1745_data_callback_t user_callback, bh1745_data_t * p_data); /** * @brief Function for reading system control register. * * @param[in] p_instance Pointer to sensor instance. * @param[in] user_cb Function to be called after register is read. * @param[out] reg_val Register value, single uint8_t. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ __STATIC_INLINE ret_code_t bh1745_sys_ctrl_read(bh1745_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val); /** * @brief Function for reading interrupt register. * * @param[in] p_instance Pointer to sensor instance. * @param[in] user_cb Function to be called after register is read. * @param[out] reg_val Register value, single uint8_t. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ __STATIC_INLINE ret_code_t bh1745_interrupt_read(bh1745_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val); /** * @brief Function for reading manufacturer id register. * * @param[in] p_instance Pointer to sensor instance. * @param[in] user_cb Function to be called after register is read. * @param[out] reg_val Register value, single uint8_t. * * @return Return error code from nrf_twi_sensor @ref nrf_twi_sensor_reg_read */ __STATIC_INLINE ret_code_t bh1745_manu_id_read(bh1745_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val); /** * @brief Function for checking if RGBC data has been updated after last configuration change. * * This function should be used in data callback. * * @param[in] p_instance Pointer to the sensor instance. * * @return True if data is valid. */ __STATIC_INLINE bool bh1745_is_data_valid(bh1745_data_t * p_data); #ifndef SUPPRESS_INLINE_IMPLEMENTATION __STATIC_INLINE ret_code_t bh1745_sys_ctrl_read(bh1745_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val) { ASSERT(p_instance != NULL); return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, BH1745_REG_SYSTEM_CONTROL, user_cb, reg_val, 1); } __STATIC_INLINE ret_code_t bh1745_interrupt_read(bh1745_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val) { ASSERT(p_instance != NULL); return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, BH1745_REG_INTERRUPT, user_cb, reg_val, 1); } __STATIC_INLINE ret_code_t bh1745_manu_id_read(bh1745_instance_t * p_instance, nrf_twi_sensor_reg_cb_t user_cb, uint8_t * reg_val) { ASSERT(p_instance != NULL); return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, BH1745_REG_MANUFACTURER_ID, user_cb, reg_val, 1); } __STATIC_INLINE bool bh1745_is_data_valid(bh1745_data_t * p_data) { return NRF_TWI_SENSOR_REG_VAL_GET(p_data->valid, BH1745_VALID_MASK, BH1745_VALID_POS); } #endif //SUPPRESS_INLINE_IMPLEMENTATION #ifdef __cplusplus } #endif #endif // BH1745_H