1 files changed, 261 insertions, 0 deletions
diff --git a/src/libs/mynewt-nimble/apps/blehr/src/main.c b/src/libs/mynewt-nimble/apps/blehr/src/main.c
new file mode 100644
index 00000000..bf0f3f30
--- /dev/null
+++ b/src/libs/mynewt-nimble/apps/blehr/src/main.c
@@ -0,0 +1,261 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+#include <assert.h>
+#include <string.h>
+#include <stdio.h>
+#include <errno.h>
+
+#include "os/mynewt.h"
+#include "console/console.h"
+#include "config/config.h"
+#include "nimble/ble.h"
+#include "host/ble_hs.h"
+#include "services/gap/ble_svc_gap.h"
+#include "blehr_sens.h"
+
+static bool notify_state;
+
+/* Connection handle */
+static uint16_t conn_handle;
+
+static const char *device_name = "blehr_sensor";
+
+static int blehr_gap_event(struct ble_gap_event *event, void *arg);
+
+static uint8_t blehr_addr_type;
+
+/* Sending notify data timer */
+static struct os_callout blehr_tx_timer;
+
+/* Variable to simulate heart beats */
+static uint8_t heartrate = 90;
+
+/*
+ * Enables advertising with parameters:
+ *     o General discoverable mode
+ *     o Undirected connectable mode
+ */
+static void
+blehr_advertise(void)
+{
+    struct ble_gap_adv_params adv_params;
+    struct ble_hs_adv_fields fields;
+    int rc;
+
+    /*
+     *  Set the advertisement data included in our advertisements:
+     *     o Flags (indicates advertisement type and other general info)
+     *     o Advertising tx power
+     *     o Device name
+     */
+    memset(&fields, 0, sizeof(fields));
+
+    /*
+     * Advertise two flags:
+     *      o Discoverability in forthcoming advertisement (general)
+     *      o BLE-only (BR/EDR unsupported)
+     */
+    fields.flags = BLE_HS_ADV_F_DISC_GEN |
+                    BLE_HS_ADV_F_BREDR_UNSUP;
+
+    /*
+     * Indicate that the TX power level field should be included; have the
+     * stack fill this value automatically.  This is done by assigning the
+     * special value BLE_HS_ADV_TX_PWR_LVL_AUTO.
+     */
+    fields.tx_pwr_lvl_is_present = 1;
+    fields.tx_pwr_lvl = BLE_HS_ADV_TX_PWR_LVL_AUTO;
+
+    fields.name = (uint8_t *)device_name;
+    fields.name_len = strlen(device_name);
+    fields.name_is_complete = 1;
+
+    rc = ble_gap_adv_set_fields(&fields);
+    if (rc != 0) {
+        MODLOG_DFLT(ERROR, "error setting advertisement data; rc=%d\n", rc);
+        return;
+    }
+
+    /* Begin advertising */
+    memset(&adv_params, 0, sizeof(adv_params));
+    adv_params.conn_mode = BLE_GAP_CONN_MODE_UND;
+    adv_params.disc_mode = BLE_GAP_DISC_MODE_GEN;
+    rc = ble_gap_adv_start(blehr_addr_type, NULL, BLE_HS_FOREVER,
+                           &adv_params, blehr_gap_event, NULL);
+    if (rc != 0) {
+        MODLOG_DFLT(ERROR, "error enabling advertisement; rc=%d\n", rc);
+        return;
+    }
+}
+
+static void
+blehr_tx_hrate_stop(void)
+{
+    os_callout_stop(&blehr_tx_timer);
+}
+
+/* Reset heartrate measurment */
+static void
+blehr_tx_hrate_reset(void)
+{
+    int rc;
+
+    rc = os_callout_reset(&blehr_tx_timer, OS_TICKS_PER_SEC);
+    assert(rc == 0);
+}
+
+/* This functions simulates heart beat and notifies it to the client */
+static void
+blehr_tx_hrate(struct os_event *ev)
+{
+    static uint8_t hrm[2];
+    int rc;
+    struct os_mbuf *om;
+
+    if (!notify_state) {
+        blehr_tx_hrate_stop();
+        heartrate = 90;
+        return;
+    }
+
+    hrm[0] = 0x06; /* contact of a sensor */
+    hrm[1] = heartrate; /* storing dummy data */
+
+    /* Simulation of heart beats */
+    heartrate++;
+    if (heartrate == 160) {
+        heartrate = 90;
+    }
+
+    om = ble_hs_mbuf_from_flat(hrm, sizeof(hrm));
+
+    rc = ble_gattc_notify_custom(conn_handle, hrs_hrm_handle, om);
+
+    assert(rc == 0);
+    blehr_tx_hrate_reset();
+}
+
+static int
+blehr_gap_event(struct ble_gap_event *event, void *arg)
+{
+    switch (event->type) {
+    case BLE_GAP_EVENT_CONNECT:
+        /* A new connection was established or a connection attempt failed */
+        MODLOG_DFLT(INFO, "connection %s; status=%d\n",
+                    event->connect.status == 0 ? "established" : "failed",
+                    event->connect.status);
+
+        if (event->connect.status != 0) {
+            /* Connection failed; resume advertising */
+            blehr_advertise();
+            conn_handle = 0;
+        }
+        else {
+          conn_handle = event->connect.conn_handle;
+        }
+
+        break;
+
+    case BLE_GAP_EVENT_DISCONNECT:
+        MODLOG_DFLT(INFO, "disconnect; reason=%d\n", event->disconnect.reason);
+        conn_handle = BLE_HS_CONN_HANDLE_NONE; /* reset conn_handle */
+
+        /* Connection terminated; resume advertising */
+        blehr_advertise();
+        break;
+
+    case BLE_GAP_EVENT_ADV_COMPLETE:
+        MODLOG_DFLT(INFO, "adv complete\n");
+        blehr_advertise();
+        break;
+
+    case BLE_GAP_EVENT_SUBSCRIBE:
+        MODLOG_DFLT(INFO, "subscribe event; cur_notify=%d\n value handle; "
+                          "val_handle=%d\n",
+                    event->subscribe.cur_notify, hrs_hrm_handle);
+        if (event->subscribe.attr_handle == hrs_hrm_handle) {
+            notify_state = event->subscribe.cur_notify;
+            blehr_tx_hrate_reset();
+        } else if (event->subscribe.attr_handle != hrs_hrm_handle) {
+            notify_state = event->subscribe.cur_notify;
+            blehr_tx_hrate_stop();
+        }
+        break;
+
+    case BLE_GAP_EVENT_MTU:
+        MODLOG_DFLT(INFO, "mtu update event; conn_handle=%d mtu=%d\n",
+                    event->mtu.conn_handle,
+                    event->mtu.value);
+        break;
+
+    }
+
+    return 0;
+}
+
+static void
+blehr_on_sync(void)
+{
+    int rc;
+
+    /* Use privacy */
+    rc = ble_hs_id_infer_auto(0, &blehr_addr_type);
+    assert(rc == 0);
+
+    /* Begin advertising */
+    blehr_advertise();
+}
+
+/*
+ * main
+ *
+ * The main task for the project. This function initializes the packages,
+ * then starts serving events from default event queue.
+ *
+ * @return int NOTE: this function should never return!
+ */
+int
+main(void)
+{
+    int rc;
+
+    /* Initialize OS */
+    sysinit();
+
+    /* Initialize the NimBLE host configuration */
+    ble_hs_cfg.sync_cb = blehr_on_sync;
+
+    os_callout_init(&blehr_tx_timer, os_eventq_dflt_get(),
+                    blehr_tx_hrate, NULL);
+
+    rc = gatt_svr_init();
+    assert(rc == 0);
+
+    /* Set the default device name */
+    rc = ble_svc_gap_device_name_set(device_name);
+    assert(rc == 0);
+
+    /* As the last thing, process events from default event queue */
+    while (1) {
+        os_eventq_run(os_eventq_dflt_get());
+    }
+    return 0;
+}
+