diff options
Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_nrf_ble_cgms/cgms_meas.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_nrf_ble_cgms/cgms_meas.c | 248 |
1 files changed, 248 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_nrf_ble_cgms/cgms_meas.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_nrf_ble_cgms/cgms_meas.c new file mode 100644 index 0000000..50d6416 --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_nrf_ble_cgms/cgms_meas.c @@ -0,0 +1,248 @@ +/** + * Copyright (c) 2016 - 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 <stdint.h> +#include <string.h> +#include "ble.h" +#include "sdk_macros.h" +#include "ble_srv_common.h" +#include "nrf_ble_cgms.h" +#include "cgms_meas.h" +#include "cgms_db.h" + +/**@brief Function for encoding a Glucose measurement. + * + * @param[in] p_meas Measurement to be encoded. + * @param[out] p_encoded_buffer Pointer to buffer where the encoded measurement is to be stored. + * + * @return Size of encoded measurement. + */ +static uint8_t cgms_meas_encode(nrf_ble_cgms_t * p_cgms, + const nrf_ble_cgms_meas_t * p_meas, + uint8_t * p_encoded_buffer) +{ + uint8_t len = 2; + + uint8_t flags = p_meas->flags; + + len += uint16_encode(p_meas->glucose_concentration, + &p_encoded_buffer[len]); + len += uint16_encode(p_meas->time_offset, + &p_encoded_buffer[len]); + + if (p_meas->sensor_status_annunciation.warning != 0) + { + p_encoded_buffer[len++] = p_meas->sensor_status_annunciation.warning; + flags |= NRF_BLE_CGMS_STATUS_FLAGS_WARNING_OCT_PRESENT; + } + + if (p_meas->sensor_status_annunciation.calib_temp != 0) + { + p_encoded_buffer[len++] = p_meas->sensor_status_annunciation.calib_temp; + flags |= NRF_BLE_CGMS_STATUS_FLAGS_CALTEMP_OCT_PRESENT; + } + + if (p_meas->sensor_status_annunciation.status != 0) + { + p_encoded_buffer[len++] = p_meas->sensor_status_annunciation.status; + flags |= NRF_BLE_CGMS_STATUS_FLAGS_STATUS_OCT_PRESENT; + } + + // Trend field + if (p_cgms->feature.feature & NRF_BLE_CGMS_FEAT_CGM_TREND_INFORMATION_SUPPORTED) + { + if (flags & NRF_BLE_CGMS_FLAG_TREND_INFO_PRESENT) + { + len += uint16_encode(p_meas->trend, &p_encoded_buffer[len]); + } + } + + // Quality field + if (p_cgms->feature.feature & NRF_BLE_CGMS_FEAT_CGM_QUALITY_SUPPORTED) + { + if (flags & NRF_BLE_CGMS_FLAGS_QUALITY_PRESENT) + { + len += uint16_encode(p_meas->quality, &p_encoded_buffer[len]); + } + } + + p_encoded_buffer[1] = flags; + p_encoded_buffer[0] = len; + return len; +} + + +/**@brief Function for adding a characteristic for the Continuous Glucose Meter Measurement. + * + * @param[in] p_cgms Service instance. + * + * @return NRF_SUCCESS if characteristic was successfully added, otherwise an error code. + */ +ret_code_t cgms_meas_char_add(nrf_ble_cgms_t * p_cgms) +{ + uint8_t num_recs; + uint8_t encoded_cgms_meas[NRF_BLE_CGMS_MEAS_LEN_MAX]; + ble_add_char_params_t add_char_params; + ble_cgms_rec_t initial_cgms_rec_value; + + memset(&add_char_params, 0, sizeof(add_char_params)); + memset(&initial_cgms_rec_value, 0, sizeof(ble_cgms_rec_t)); + + num_recs = cgms_db_num_records_get(); + if (num_recs > 0) + { + uint32_t err_code = cgms_db_record_get(num_recs - 1, &initial_cgms_rec_value); + if (err_code != NRF_SUCCESS) + { + return err_code; + } + } + + add_char_params.uuid = BLE_UUID_CGM_MEASUREMENT; + add_char_params.max_len = NRF_BLE_CGMS_MEAS_LEN_MAX; + add_char_params.init_len = cgms_meas_encode(p_cgms, + &initial_cgms_rec_value.meas, + encoded_cgms_meas); + add_char_params.p_init_value = encoded_cgms_meas; + add_char_params.is_var_len = true; + add_char_params.char_props.notify = true; + add_char_params.cccd_write_access = SEC_JUST_WORKS; + + + return characteristic_add(p_cgms->service_handle, + &add_char_params, + &p_cgms->char_handles.measurment); +} + + +ret_code_t cgms_meas_send(nrf_ble_cgms_t * p_cgms, ble_cgms_rec_t * p_rec, uint8_t * p_count) +{ + + uint32_t err_code; + uint8_t encoded_meas[NRF_BLE_CGMS_MEAS_LEN_MAX + NRF_BLE_CGMS_MEAS_REC_LEN_MAX]; + uint16_t len = 0; + uint16_t hvx_len = NRF_BLE_CGMS_MEAS_LEN_MAX; + int i; + ble_gatts_hvx_params_t hvx_params; + + for (i = 0; i < *p_count; i++) + { + uint8_t meas_len = cgms_meas_encode(p_cgms, &(p_rec[i].meas), (encoded_meas + len)); + if (len + meas_len >= NRF_BLE_CGMS_MEAS_LEN_MAX) + { + break; + } + len += meas_len; + } + *p_count = i; + hvx_len = len; + + memset(&hvx_params, 0, sizeof(hvx_params)); + + hvx_params.handle = p_cgms->char_handles.measurment.value_handle; + hvx_params.type = BLE_GATT_HVX_NOTIFICATION; + hvx_params.offset = 0; + hvx_params.p_len = &hvx_len; + hvx_params.p_data = encoded_meas; + + err_code = sd_ble_gatts_hvx(p_cgms->conn_handle, &hvx_params); + if (err_code == NRF_SUCCESS) + { + if (hvx_len != len) + { + err_code = NRF_ERROR_DATA_SIZE; + } + else + { + // Measurement successfully sent + p_cgms->racp_data.racp_proc_records_reported += *p_count; + p_cgms->racp_data.racp_proc_records_reported_since_txcomplete++; + } + } + + return err_code; +} + + +/**@brief Function for handling the Glucose measurement CCCD write event. + * + * @param[in] p_cgms Service instance. + * @param[in] p_evt_write WRITE event to be handled. + */ +static void on_meas_cccd_write(nrf_ble_cgms_t * p_cgms, ble_gatts_evt_write_t const * p_evt_write) +{ + if (p_evt_write->len == 2) + { + // CCCD written, update notification state + if (p_cgms->evt_handler != NULL) + { + nrf_ble_cgms_evt_t evt; + + if (ble_srv_is_notification_enabled(p_evt_write->data)) + { + evt.evt_type = NRF_BLE_CGMS_EVT_NOTIFICATION_ENABLED; + } + else + { + evt.evt_type = NRF_BLE_CGMS_EVT_NOTIFICATION_DISABLED; + } + + p_cgms->evt_handler(p_cgms, &evt); + } + } +} + + +/**@brief Function for handling the WRITE event. + * + * @details Handles WRITE events from the BLE stack. + * + * @param[in] p_cgms Glucose Service structure. + * @param[in] p_ble_evt Event received from the BLE stack. + */ +void cgms_meas_on_write(nrf_ble_cgms_t * p_cgms, ble_gatts_evt_write_t const * p_evt_write) +{ + + if (p_evt_write->handle == p_cgms->char_handles.measurment.cccd_handle) + { + on_meas_cccd_write(p_cgms, p_evt_write); + } +} + + |