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Diffstat (limited to 'thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_nrf_ble_cgms/cgms_sst.c')
| -rw-r--r-- | thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_nrf_ble_cgms/cgms_sst.c | 235 |
1 files changed, 235 insertions, 0 deletions
diff --git a/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_nrf_ble_cgms/cgms_sst.c b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_nrf_ble_cgms/cgms_sst.c new file mode 100644 index 0000000..b6b2fcd --- /dev/null +++ b/thirdparty/nRF5_SDK_15.0.0_a53641a/components/ble/ble_services/experimental_nrf_ble_cgms/cgms_sst.c @@ -0,0 +1,235 @@ +/** + * 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 <time.h> +#include "ble.h" +#include "ble_srv_common.h" +#include "nrf_ble_cgms.h" +#include "cgms_sst.h" + + +void sst_decode(ble_cgms_sst_t * p_sst, const uint8_t * p_data, const uint16_t len) +{ + uint32_t index; + + if (len != NRF_BLE_CGMS_SST_LEN) + { + return; + } + + index = ble_date_time_decode(&p_sst->date_time, p_data); + + p_sst->time_zone = p_data[index++]; + p_sst->dst = p_data[index++]; +} + + +void convert_ble_time_c_time(ble_cgms_sst_t * p_sst, struct tm * p_c_time_date) +{ + p_c_time_date->tm_sec = p_sst->date_time.seconds; + p_c_time_date->tm_min = p_sst->date_time.minutes; + p_c_time_date->tm_hour = p_sst->date_time.hours; + p_c_time_date->tm_mday = p_sst->date_time.day; + p_c_time_date->tm_mon = p_sst->date_time.month; + p_c_time_date->tm_year = p_sst->date_time.year - 1900; + + // Ignore daylight saving for this conversion. + p_c_time_date->tm_isdst = 0; +} + + +void calc_sst(uint16_t offset, struct tm * p_c_time_date) +{ + time_t c_time_in_sec; + + c_time_in_sec = mktime(p_c_time_date); + c_time_in_sec = c_time_in_sec - (offset * 60); + *p_c_time_date = *(localtime(&c_time_in_sec)); + + if (p_c_time_date->tm_isdst == 1) + { + // Daylight saving time is not used and must be removed. + p_c_time_date->tm_hour = p_c_time_date->tm_hour - 1; + p_c_time_date->tm_isdst = 0; + } +} + + +static void convert_c_time_ble_time(ble_cgms_sst_t * p_sst, struct tm * p_c_time_date) +{ + p_sst->date_time.seconds = p_c_time_date->tm_sec; + p_sst->date_time.minutes = p_c_time_date->tm_min; + p_sst->date_time.hours = p_c_time_date->tm_hour; + p_sst->date_time.day = p_c_time_date->tm_mday; + p_sst->date_time.month = p_c_time_date->tm_mon; + p_sst->date_time.year = p_c_time_date->tm_year + 1900; +} + + +static uint8_t sst_encode(ble_cgms_sst_t * p_sst, uint8_t * p_encoded_sst) +{ + uint8_t len; + + len = ble_date_time_encode(&p_sst->date_time, p_encoded_sst); + + p_encoded_sst[len++] = p_sst->time_zone; + p_encoded_sst[len++] = p_sst->dst; + + return len; +} + + +static ret_code_t cgm_update_sst(nrf_ble_cgms_t * p_cgms, ble_gatts_evt_write_t const * p_evt_write) +{ + ble_cgms_sst_t sst; + struct tm c_time_and_date; + + memset(&sst, 0, sizeof(ble_cgms_sst_t)); + + sst_decode(&sst, p_evt_write->data, p_evt_write->len); + convert_ble_time_c_time(&sst, &c_time_and_date); + calc_sst(p_cgms->sensor_status.time_offset, &c_time_and_date); + convert_c_time_ble_time(&sst, &c_time_and_date); + + return cgms_sst_set(p_cgms, &sst); +} + + +/**@brief Function for handling the Glucose session start time write event. + * + * @param[in] p_cgms Service instance. + * @param[in] p_evt_write WRITE event to be handled. + */ +static void on_sst_value_write(nrf_ble_cgms_t * p_cgms, ble_gatts_evt_write_t const * p_evt_write) +{ + ble_gatts_rw_authorize_reply_params_t auth_reply; + uint32_t err_code; + + memset(&auth_reply, 0, sizeof(auth_reply)); + + auth_reply.type = BLE_GATTS_AUTHORIZE_TYPE_WRITE; + auth_reply.params.write.update = 1; + auth_reply.params.write.gatt_status = BLE_GATT_STATUS_SUCCESS; + + err_code = sd_ble_gatts_rw_authorize_reply(p_cgms->conn_handle, &auth_reply); + if (err_code != NRF_SUCCESS) + { + if (p_cgms->error_handler != NULL) + { + p_cgms->error_handler(err_code); + } + } + + err_code = cgm_update_sst(p_cgms, p_evt_write); + if (err_code != NRF_SUCCESS) + { + if (p_cgms->error_handler != NULL) + { + p_cgms->error_handler(err_code); + } + } +} + + +/**@brief Function for adding a characteristic for the Session Start Time. + * + * @param[in] p_cgms Service instance. + * + * @return NRF_SUCCESS if characteristic was successfully added, otherwise an error code. + */ +ret_code_t cgms_sst_char_add(nrf_ble_cgms_t * p_cgms) +{ + ble_add_char_params_t add_char_params; + uint8_t init_value[NRF_BLE_CGMS_SST_LEN] = {0}; + + memset(&add_char_params, 0, sizeof(add_char_params)); + + add_char_params.uuid = BLE_UUID_CGM_SESSION_START_TIME; + add_char_params.max_len = NRF_BLE_CGMS_SST_LEN; + + add_char_params.init_len = NRF_BLE_CGMS_SST_LEN; + add_char_params.p_init_value = init_value; + + add_char_params.read_access = SEC_JUST_WORKS; + add_char_params.write_access = SEC_JUST_WORKS; + add_char_params.is_defered_write = 1; + add_char_params.char_props.write = true; + add_char_params.char_props.read = true; + + return characteristic_add(p_cgms->service_handle, + &add_char_params, + &p_cgms->char_handles.sst); +} + + +ret_code_t cgms_sst_set(nrf_ble_cgms_t * p_cgms, ble_cgms_sst_t * p_sst) +{ + uint16_t conn_handle; + uint16_t value_handle; + ble_gatts_value_t sst_val; + uint8_t encoded_start_session_time[NRF_BLE_CGMS_SST_LEN]; + uint8_t gatts_value_set_len = 0; + + gatts_value_set_len = sst_encode(p_sst, encoded_start_session_time); + conn_handle = p_cgms->conn_handle; + value_handle = p_cgms->char_handles.sst.value_handle; + memset(&sst_val, 0, sizeof(ble_gatts_value_t)); + sst_val.len = gatts_value_set_len; + sst_val.p_value = encoded_start_session_time; + sst_val.offset = 0; + + return (sd_ble_gatts_value_set(conn_handle, value_handle, &sst_val)); +} + + +void cgms_sst_on_rw_auth_req(nrf_ble_cgms_t * p_cgms, + ble_gatts_evt_rw_authorize_request_t const * p_auth_req) +{ + if (p_auth_req->type == BLE_GATTS_AUTHORIZE_TYPE_WRITE) + { + if (p_auth_req->request.write.handle == p_cgms->char_handles.sst.value_handle) + { + on_sst_value_write(p_cgms, &p_auth_req->request.write); + } + } +} + + |