mirror of
https://github.com/espressif/esp-idf.git
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3545b58986
Includes all the latest NimBLE stack changes from idf-v4.0 with few idf-v3.3 specific modifications. - Addition of nimble component as submodule (`nimble-1.1.0-idf-v3.3`), contains IDF v3.3 specific minor changes. - Example applications are identical to idf-v4.0 - Modification in `bt/Kconfig` to accommodate NimBLE as a BT host.
305 lines
8.0 KiB
C
305 lines
8.0 KiB
C
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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#include "esp_log.h"
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#include "nvs_flash.h"
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#include "freertos/FreeRTOSConfig.h"
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/* BLE */
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#include "esp_nimble_hci.h"
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#include "nimble/nimble_port.h"
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#include "nimble/nimble_port_freertos.h"
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#include "host/ble_hs.h"
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#include "host/util/util.h"
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#include "console/console.h"
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#include "services/gap/ble_svc_gap.h"
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#include "blehr_sens.h"
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static const char *tag = "NimBLE_BLE_HeartRate";
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static xTimerHandle blehr_tx_timer;
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static bool notify_state;
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static uint16_t conn_handle;
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static const char *device_name = "blehr_sensor_1.0";
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static int blehr_gap_event(struct ble_gap_event *event, void *arg);
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static uint8_t blehr_addr_type;
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/* Variable to simulate heart beats */
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static uint8_t heartrate = 90;
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/**
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* Utility function to log an array of bytes.
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*/
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void
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print_bytes(const uint8_t *bytes, int len)
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{
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int i;
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for (i = 0; i < len; i++) {
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MODLOG_DFLT(INFO, "%s0x%02x", i != 0 ? ":" : "", bytes[i]);
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}
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}
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void
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print_addr(const void *addr)
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{
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const uint8_t *u8p;
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u8p = addr;
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MODLOG_DFLT(INFO, "%02x:%02x:%02x:%02x:%02x:%02x",
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u8p[5], u8p[4], u8p[3], u8p[2], u8p[1], u8p[0]);
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}
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/*
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* Enables advertising with parameters:
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* o General discoverable mode
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* o Undirected connectable mode
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*/
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static void
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blehr_advertise(void)
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{
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struct ble_gap_adv_params adv_params;
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struct ble_hs_adv_fields fields;
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int rc;
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/*
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* Set the advertisement data included in our advertisements:
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* o Flags (indicates advertisement type and other general info)
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* o Advertising tx power
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* o Device name
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*/
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memset(&fields, 0, sizeof(fields));
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/*
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* Advertise two flags:
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* o Discoverability in forthcoming advertisement (general)
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* o BLE-only (BR/EDR unsupported)
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*/
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fields.flags = BLE_HS_ADV_F_DISC_GEN |
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BLE_HS_ADV_F_BREDR_UNSUP;
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/*
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* Indicate that the TX power level field should be included; have the
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* stack fill this value automatically. This is done by assigning the
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* special value BLE_HS_ADV_TX_PWR_LVL_AUTO.
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*/
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fields.tx_pwr_lvl_is_present = 1;
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fields.tx_pwr_lvl = BLE_HS_ADV_TX_PWR_LVL_AUTO;
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fields.name = (uint8_t *)device_name;
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fields.name_len = strlen(device_name);
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fields.name_is_complete = 1;
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rc = ble_gap_adv_set_fields(&fields);
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if (rc != 0) {
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MODLOG_DFLT(ERROR, "error setting advertisement data; rc=%d\n", rc);
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return;
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}
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/* Begin advertising */
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memset(&adv_params, 0, sizeof(adv_params));
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adv_params.conn_mode = BLE_GAP_CONN_MODE_UND;
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adv_params.disc_mode = BLE_GAP_DISC_MODE_GEN;
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rc = ble_gap_adv_start(blehr_addr_type, NULL, BLE_HS_FOREVER,
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&adv_params, blehr_gap_event, NULL);
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if (rc != 0) {
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MODLOG_DFLT(ERROR, "error enabling advertisement; rc=%d\n", rc);
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return;
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}
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}
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static void
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blehr_tx_hrate_stop(void)
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{
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xTimerStop( blehr_tx_timer, 1000 / portTICK_PERIOD_MS );
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}
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/* Reset heart rate measurement */
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static void
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blehr_tx_hrate_reset(void)
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{
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int rc;
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if (xTimerReset(blehr_tx_timer, 1000 / portTICK_PERIOD_MS ) == pdPASS) {
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rc = 0;
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} else {
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rc = 1;
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}
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assert(rc == 0);
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}
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/* This function simulates heart beat and notifies it to the client */
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static void
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blehr_tx_hrate(xTimerHandle ev)
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{
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static uint8_t hrm[2];
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int rc;
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struct os_mbuf *om;
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if (!notify_state) {
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blehr_tx_hrate_stop();
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heartrate = 90;
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return;
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}
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hrm[0] = 0x06; /* contact of a sensor */
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hrm[1] = heartrate; /* storing dummy data */
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/* Simulation of heart beats */
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heartrate++;
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if (heartrate == 160) {
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heartrate = 90;
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}
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om = ble_hs_mbuf_from_flat(hrm, sizeof(hrm));
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rc = ble_gattc_notify_custom(conn_handle, hrs_hrm_handle, om);
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assert(rc == 0);
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blehr_tx_hrate_reset();
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}
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static int
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blehr_gap_event(struct ble_gap_event *event, void *arg)
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{
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switch (event->type) {
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case BLE_GAP_EVENT_CONNECT:
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/* A new connection was established or a connection attempt failed */
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MODLOG_DFLT(INFO, "connection %s; status=%d\n",
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event->connect.status == 0 ? "established" : "failed",
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event->connect.status);
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if (event->connect.status != 0) {
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/* Connection failed; resume advertising */
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blehr_advertise();
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}
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conn_handle = event->connect.conn_handle;
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break;
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case BLE_GAP_EVENT_DISCONNECT:
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MODLOG_DFLT(INFO, "disconnect; reason=%d\n", event->disconnect.reason);
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/* Connection terminated; resume advertising */
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blehr_advertise();
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break;
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case BLE_GAP_EVENT_ADV_COMPLETE:
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MODLOG_DFLT(INFO, "adv complete\n");
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blehr_advertise();
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break;
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case BLE_GAP_EVENT_SUBSCRIBE:
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MODLOG_DFLT(INFO, "subscribe event; cur_notify=%d\n value handle; "
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"val_handle=%d\n",
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event->subscribe.cur_notify, hrs_hrm_handle);
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if (event->subscribe.attr_handle == hrs_hrm_handle) {
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notify_state = event->subscribe.cur_notify;
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blehr_tx_hrate_reset();
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} else if (event->subscribe.attr_handle != hrs_hrm_handle) {
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notify_state = event->subscribe.cur_notify;
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blehr_tx_hrate_stop();
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}
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ESP_LOGI("BLE_GAP_SUBSCRIBE_EVENT", "conn_handle from subscribe=%d", conn_handle);
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break;
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case BLE_GAP_EVENT_MTU:
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MODLOG_DFLT(INFO, "mtu update event; conn_handle=%d mtu=%d\n",
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event->mtu.conn_handle,
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event->mtu.value);
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break;
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}
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return 0;
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}
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static void
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blehr_on_sync(void)
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{
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int rc;
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rc = ble_hs_id_infer_auto(0, &blehr_addr_type);
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assert(rc == 0);
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uint8_t addr_val[6] = {0};
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rc = ble_hs_id_copy_addr(blehr_addr_type, addr_val, NULL);
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MODLOG_DFLT(INFO, "Device Address: ");
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print_addr(addr_val);
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MODLOG_DFLT(INFO, "\n");
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/* Begin advertising */
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blehr_advertise();
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}
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static void
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blehr_on_reset(int reason)
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{
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MODLOG_DFLT(ERROR, "Resetting state; reason=%d\n", reason);
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}
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void blehr_host_task(void *param)
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{
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ESP_LOGI(tag, "BLE Host Task Started");
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/* This function will return only when nimble_port_stop() is executed */
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nimble_port_run();
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nimble_port_freertos_deinit();
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}
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void app_main(void)
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{
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int rc;
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/* Initialize NVS — it is used to store PHY calibration data */
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esp_err_t ret = nvs_flash_init();
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if (ret == ESP_ERR_NVS_NO_FREE_PAGES || ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {
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ESP_ERROR_CHECK(nvs_flash_erase());
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ret = nvs_flash_init();
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}
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ESP_ERROR_CHECK(ret);
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ESP_ERROR_CHECK(esp_nimble_hci_and_controller_init());
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nimble_port_init();
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/* Initialize the NimBLE host configuration */
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ble_hs_cfg.sync_cb = blehr_on_sync;
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ble_hs_cfg.reset_cb = blehr_on_reset;
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/* name, period/time, auto reload, timer ID, callback */
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blehr_tx_timer = xTimerCreate("blehr_tx_timer", pdMS_TO_TICKS(1000), pdTRUE, (void *)0, blehr_tx_hrate);
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rc = gatt_svr_init();
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assert(rc == 0);
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/* Set the default device name */
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rc = ble_svc_gap_device_name_set(device_name);
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assert(rc == 0);
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/* Start the task */
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nimble_port_freertos_init(blehr_host_task);
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}
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