/** * Copyright (c) 2017 - 2018, 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. * */ #include "hts221.h" #include #define HTS221_WRITE(p_instance, msg) \ nrf_twi_sensor_write(p_instance->p_sensor_data, \ p_instance->sensor_addr, \ msg, \ ARRAY_SIZE(msg), \ true) static void hts221_init_cb(ret_code_t result, void * p_register_data) { hts221_calib_t * calib_info = (hts221_calib_t *) p_register_data; uint8_t calib_raw[HTS221_REG_CALIBRATION_NUM]; memcpy(calib_raw, calib_info, HTS221_REG_CALIBRATION_NUM); calib_info->H0_rH_x2 = calib_raw[0]; calib_info->H1_rH_x2 = calib_raw[1]; calib_info->T0_degC_x8 = (uint16_t)calib_raw[2] + ((uint16_t)(calib_raw[5] & 0x03) << 8); calib_info->T1_degC_x8 = (uint16_t)calib_raw[3] + ((uint16_t)((calib_raw[5] >> 2) & 0x03) << 8); calib_info->H0_T0_OUT = (int16_t)calib_raw[6] + ((int16_t)calib_raw[7] << 8); calib_info->H1_T0_OUT = (int16_t)calib_raw[10] + ((int16_t)calib_raw[11] << 8); calib_info->T0_OUT = (int16_t)calib_raw[12] + ((int16_t)calib_raw[13] << 8); calib_info->T1_OUT = (int16_t)calib_raw[14] + ((int16_t)calib_raw[15] << 8); } ret_code_t hts221_init(hts221_instance_t * p_instance) { ASSERT(p_instance != NULL); if (p_instance->p_sensor_data->p_twi_mngr->p_queue->size < HTS221_MIN_QUEUE_SIZE) { return NRF_ERROR_INVALID_LENGTH; } p_instance->ctrl_reg1 = 0; uint8_t send_msg[] = { HTS221_REG_AV_CONF, HTS221_DEF_AV_CONF, 0, 0, 0 }; ret_code_t err = HTS221_WRITE(p_instance, send_msg); if (err != NRF_SUCCESS) { return err; } return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, HTS221_REG_CALIBRATION | HTS221_INCR_REG_MASK, hts221_init_cb, (uint8_t *) &p_instance->calib_info, HTS221_REG_CALIBRATION_NUM); } ret_code_t hts221_avg_cfg(hts221_instance_t * p_instance, hts221_temp_avg_samples_t temp_avg, hts221_hum_avg_samples_t hum_avg) { ASSERT(p_instance != NULL); uint8_t reg_val = 0; NRF_TWI_SENSOR_REG_SET(reg_val, HTS221_AVGT_MASK, HTS221_AVGT_POS, temp_avg); NRF_TWI_SENSOR_REG_SET(reg_val, HTS221_AVGH_MASK, HTS221_AVGH_POS, hum_avg); uint8_t send_msg[] = { HTS221_REG_AV_CONF, reg_val }; return HTS221_WRITE(p_instance, send_msg); } ret_code_t hts221_data_rate_cfg(hts221_instance_t * p_instance, hts221_odr_t odr) { ASSERT(p_instance != NULL); NRF_TWI_SENSOR_REG_SET(p_instance->ctrl_reg1, HTS221_ODR_MASK, HTS221_ODR_POS, odr); uint8_t send_msg[] = { HTS221_REG_CTRL_REG1, p_instance->ctrl_reg1 }; return HTS221_WRITE(p_instance, send_msg); } ret_code_t hts221_pd_enable(hts221_instance_t * p_instance, bool enable) { ASSERT(p_instance != NULL); NRF_TWI_SENSOR_REG_SET(p_instance->ctrl_reg1, HTS221_PD_MASK, HTS221_PD_POS, enable); uint8_t send_msg[] = { HTS221_REG_CTRL_REG1, p_instance->ctrl_reg1 }; return HTS221_WRITE(p_instance, send_msg); } ret_code_t hts221_boot(hts221_instance_t * p_instance) { ASSERT(p_instance != NULL); uint8_t reg_val = p_instance->ctrl_reg2; NRF_TWI_SENSOR_REG_SET(reg_val, HTS221_BOOT_MASK, HTS221_BOOT_POS, 1); uint8_t send_msg[] = { HTS221_REG_CTRL_REG2, reg_val }; return HTS221_WRITE(p_instance, send_msg); } ret_code_t hts221_heater_enable(hts221_instance_t * p_instance, bool enable) { ASSERT(p_instance != NULL); NRF_TWI_SENSOR_REG_SET(p_instance->ctrl_reg2, HTS221_HEATER_MASK, HTS221_HEATER_POS, enable); uint8_t send_msg[] = { HTS221_REG_CTRL_REG2, p_instance->ctrl_reg2 }; return HTS221_WRITE(p_instance, send_msg); } ret_code_t hts221_oneshot(hts221_instance_t * p_instance) { ASSERT(p_instance != NULL); uint8_t reg_val = p_instance->ctrl_reg2; NRF_TWI_SENSOR_REG_SET(reg_val, HTS221_ONE_SHOT_MASK, HTS221_ONE_SHOT_POS, true); uint8_t send_msg[] = { HTS221_REG_CTRL_REG2, reg_val }; return HTS221_WRITE(p_instance, send_msg); } ret_code_t hts221_drdy_pin_cfg(hts221_instance_t * p_instance, bool active_low, bool operation, bool drdy_enable) { ASSERT(p_instance != NULL); uint8_t reg_val = 0; NRF_TWI_SENSOR_REG_SET(reg_val, HTS221_DRDY_H_L_MASK, HTS221_DRDY_H_L_POS, active_low); NRF_TWI_SENSOR_REG_SET(reg_val, HTS221_PP_OD_MASK, HTS221_PP_OD_POS, operation); NRF_TWI_SENSOR_REG_SET(reg_val, HTS221_DRDY_EN_MASK, HTS221_DRDY_EN_POS, drdy_enable); uint8_t send_msg[] = { HTS221_REG_CTRL_REG3, reg_val }; return HTS221_WRITE(p_instance, send_msg); } ret_code_t hts221_temp_read(hts221_instance_t * p_instance, hts221_data_callback_t user_callback, int16_t * p_temp) { ASSERT(p_instance != NULL); return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, HTS221_REG_TEMP_OUT_L | HTS221_INCR_REG_MASK, (nrf_twi_sensor_reg_cb_t) user_callback, (uint8_t *) p_temp, 2); } int16_t hts221_temp_process(hts221_instance_t * p_instance, int16_t raw_temp) { ASSERT(p_instance != NULL); int32_t y; int32_t x0 = p_instance->calib_info.T0_OUT; int32_t x1 = p_instance->calib_info.T1_OUT; int32_t y0 = p_instance->calib_info.T0_degC_x8; int32_t y1 = p_instance->calib_info.T1_degC_x8; y = ((y0 * (x1 - raw_temp)) + (y1 * (raw_temp - x0))) / (x1 - x0); return y; } ret_code_t hts221_hum_read(hts221_instance_t * p_instance, hts221_data_callback_t user_callback, int16_t * p_hum) { ASSERT(p_instance != NULL); return nrf_twi_sensor_reg_read(p_instance->p_sensor_data, p_instance->sensor_addr, HTS221_REG_HUM_OUT_L | HTS221_INCR_REG_MASK, (nrf_twi_sensor_reg_cb_t) user_callback, (uint8_t *) p_hum, 2); } int16_t hts221_hum_process(hts221_instance_t * p_instance, int16_t raw_hum) { ASSERT(p_instance != NULL); int32_t y; int32_t x0 = p_instance->calib_info.H0_T0_OUT; int32_t x1 = p_instance->calib_info.H1_T0_OUT; int32_t y0 = p_instance->calib_info.H0_rH_x2; int32_t y1 = p_instance->calib_info.H1_rH_x2; y = ((y0 * (x1 - raw_hum)) + (y1 * (raw_hum - x0))) / (x1 - x0); return y; }