samples: bluetooth: peripheral_ht: Health Thermometer sample

Adding Health Thermometer Service sample. Refer to Health Thermometer
Profile Specification for detailed information about the Health
Thermometer Profile.

Signed-off-by: Aaron Tsui <aaron.tsui@outlook.com>

include/bluetooth/uuid.h

@@ -91,6 +91,10 @@ struct bt_uuid_128 {
  *  @brief Current Time Service
  */
 #define BT_UUID_CTS                       BT_UUID_DECLARE_16(0x1805)
+/** @def BT_UUID_HTS
+ *  @brief Health Thermometer Service
+ */
+#define BT_UUID_HTS                       BT_UUID_DECLARE_16(0x1809)
 /** @def BT_UUID_DIS
  *  @brief Device Information Service
  */
@@ -207,6 +211,10 @@ struct bt_uuid_128 {
  *  @brief BAS Characteristic Battery Level
  */
 #define BT_UUID_BAS_BATTERY_LEVEL         BT_UUID_DECLARE_16(0x2a19)
+/** @def BT_UUID_HTS_MEASUREMENT
+ *  @brief HTS Characteristic Measurement Value
+ */
+#define BT_UUID_HTS_MEASUREMENT           BT_UUID_DECLARE_16(0x2a1c)
 /** @def BT_UUID_HIDS_BOOT_KB_IN_REPORT
  *  @brief HID Characteristic Boot Keyboard Input Report
  */

samples/bluetooth/gatt/hts.c

@@ -0,0 +1,86 @@
+/** @file
+ *  @brief HTS Service sample
+ */
+
+/*
+ * Copyright (c) 2019 Aaron Tsui <aaron.tsui@outlook.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/types.h>
+#include <stddef.h>
+#include <string.h>
+#include <errno.h>
+#include <misc/printk.h>
+#include <misc/byteorder.h>
+#include <zephyr.h>
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/hci.h>
+#include <bluetooth/conn.h>
+#include <bluetooth/uuid.h>
+#include <bluetooth/gatt.h>
+
+static struct bt_gatt_ccc_cfg htmc_ccc_cfg[BT_GATT_CCC_MAX] = {};
+static u8_t simulate_htm;
+static u8_t indicating;
+static struct bt_gatt_indicate_params ind_params;
+
+static u8_t temperature = 20U;
+
+static void htmc_ccc_cfg_changed(const struct bt_gatt_attr *attr,
+				 u16_t value)
+{
+	simulate_htm = (value == BT_GATT_CCC_INDICATE) ? 1 : 0;
+}
+
+static void indicate_cb(struct bt_conn *conn, const struct bt_gatt_attr *attr,
+			u8_t err)
+{
+	printk("Indication %s\n", err != 0U ? "fail" : "success");
+	indicating = 0U;
+}
+
+/* Heart Rate Service Declaration */
+BT_GATT_SERVICE_DEFINE(hts_svc,
+	BT_GATT_PRIMARY_SERVICE(BT_UUID_HTS),
+	BT_GATT_CHARACTERISTIC(BT_UUID_HTS_MEASUREMENT, BT_GATT_CHRC_INDICATE,
+			       BT_GATT_PERM_NONE, NULL, NULL, NULL),
+	BT_GATT_CCC(htmc_ccc_cfg, htmc_ccc_cfg_changed),
+	/* more optional Characteristics */
+);
+
+void hts_init(void)
+{
+}
+
+void hts_indicate(void)
+{
+	/* Temperature measurements simulation */
+	if (simulate_htm) {
+		if (indicating) {
+			return;
+		}
+
+		temperature++;
+		if (temperature == 30U) {
+			temperature = 20U;
+		}
+
+		static u8_t htm[1 + 4];
+		htm[0] = 0x0; /* uint8, temperature in celsius*/
+		/* (IEEE-11073 32-bit FLOAT). */
+		htm[1] = temperature; /* mantissa = temperature*/
+		htm[2] = htm[3] = htm[4] = 0; /* sign = 0, exponent= 0 */
+
+		ind_params.attr = &hts_svc.attrs[2];
+		ind_params.func = indicate_cb;
+		ind_params.data = &htm;
+		ind_params.len = sizeof(htm);
+
+		if (bt_gatt_indicate(NULL, &ind_params) == 0) {
+			indicating = 1U;
+		}
+	}
+}

samples/bluetooth/gatt/hts.h

@@ -0,0 +1,20 @@
+/** @file
+ *  @brief HTS Service sample
+ */
+
+/*
+ * Copyright (c) 2019 Aaron Tsui <aaron.tsui@outlook.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void hts_init(void);
+void hts_indicate(void);
+
+#ifdef __cplusplus
+}
+#endif

samples/bluetooth/peripheral_ht/CMakeLists.txt

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.13.1)
+
+include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+project(peripheral_ht)
+
+FILE(GLOB app_sources src/*.c)
+target_sources(app PRIVATE
+  ${app_sources}
+  ../gatt/hts.c
+  ../gatt/bas.c
+  )
+
+zephyr_library_include_directories($ENV{ZEPHYR_BASE}/samples/bluetooth)

samples/bluetooth/peripheral_ht/README.rst

@@ -0,0 +1,26 @@
+.. _peripheral_ht:
+
+Bluetooth: Peripheral HT
+########################
+
+Overview
+********
+
+Similar to the :ref:`Peripheral <ble_peripheral>` sample, except that this
+application specifically exposes the HT (Health Thermometer) GATT Service. Once a device
+connects it will generate dummy temperature values.
+
+
+Requirements
+************
+
+* BlueZ running on the host, or
+* A board with BLE support
+
+Building and Running
+********************
+
+This sample can be found under :zephyr_file:`samples/bluetooth/peripheral_ht` in the
+Zephyr tree.
+
+See :ref:`bluetooth samples section <bluetooth-samples>` for details.

samples/bluetooth/peripheral_ht/prj.conf

@@ -0,0 +1,9 @@
+CONFIG_BT=y
+CONFIG_BT_DEBUG_LOG=y
+CONFIG_BT_SMP=y
+CONFIG_BT_PERIPHERAL=y
+CONFIG_BT_GATT_DIS=y
+CONFIG_BT_GATT_DIS_PNP=n
+CONFIG_BT_DEVICE_NAME="Zephyr Health Thermometer"
+CONFIG_BT_DEVICE_APPEARANCE=768
+CONFIG_BT_ATT_ENFORCE_FLOW=n

samples/bluetooth/peripheral_ht/sample.yaml

@@ -0,0 +1,14 @@
+sample:
+  description: TBD
+  name: TBD
+tests:
+  sample.bluetooth.peripheral_ht:
+    harness: bluetooth
+    platform_whitelist: qemu_cortex_m3 qemu_x86
+    tags: bluetooth
+  sample.bluetooth.peripheral_ht.frdm_kw41z_shield:
+    harness: bluetooth
+    platform_whitelist: mimxrt1020_evk mimxrt1050_evk mimxrt1060_evk frdm_k64f
+    tags: bluetooth
+    extra_args: SHIELD=frdm_kw41z
+

samples/bluetooth/peripheral_ht/src/main.c

@@ -0,0 +1,120 @@
+/* main.c - Application main entry point */
+
+/*
+ * Copyright (c) 2019 Aaron Tsui <aaron.tsui@outlook.com>
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <zephyr/types.h>
+#include <stddef.h>
+#include <string.h>
+#include <errno.h>
+#include <misc/printk.h>
+#include <misc/byteorder.h>
+#include <zephyr.h>
+
+#include <bluetooth/bluetooth.h>
+#include <bluetooth/hci.h>
+#include <bluetooth/conn.h>
+#include <bluetooth/uuid.h>
+#include <bluetooth/gatt.h>
+
+#include <gatt/hts.h>
+#include <gatt/bas.h>
+
+struct bt_conn *default_conn;
+
+static const struct bt_data ad[] = {
+	BT_DATA_BYTES(BT_DATA_FLAGS, (BT_LE_AD_GENERAL | BT_LE_AD_NO_BREDR)),
+	BT_DATA_BYTES(BT_DATA_UUID16_ALL,
+		      0x09, 0x18, /* Health Thermometer Service */
+		      0x0a, 0x18, /* Device Information Service */
+		      0x0f, 0x18), /* Battery Service */
+};
+
+static void connected(struct bt_conn *conn, u8_t err)
+{
+	if (err) {
+		printk("Connection failed (err %u)\n", err);
+	} else {
+		default_conn = bt_conn_ref(conn);
+		printk("Connected\n");
+	}
+}
+
+static void disconnected(struct bt_conn *conn, u8_t reason)
+{
+	printk("Disconnected (reason %u)\n", reason);
+
+	if (default_conn) {
+		bt_conn_unref(default_conn);
+		default_conn = NULL;
+	}
+}
+
+static struct bt_conn_cb conn_callbacks = {
+	.connected = connected,
+	.disconnected = disconnected,
+};
+
+static void bt_ready(int err)
+{
+	if (err) {
+		printk("Bluetooth init failed (err %d)\n", err);
+		return;
+	}
+
+	printk("Bluetooth initialized\n");
+
+	hts_init();
+	bas_init();
+
+	err = bt_le_adv_start(BT_LE_ADV_CONN_NAME, ad, ARRAY_SIZE(ad), NULL, 0);
+	if (err) {
+		printk("Advertising failed to start (err %d)\n", err);
+		return;
+	}
+
+	printk("Advertising successfully started\n");
+}
+
+static void auth_cancel(struct bt_conn *conn)
+{
+	char addr[BT_ADDR_LE_STR_LEN];
+
+	bt_addr_le_to_str(bt_conn_get_dst(conn), addr, sizeof(addr));
+
+	printk("Pairing cancelled: %s\n", addr);
+}
+
+static struct bt_conn_auth_cb auth_cb_display = {
+	.cancel = auth_cancel,
+};
+
+void main(void)
+{
+	int err;
+
+	err = bt_enable(bt_ready);
+	if (err) {
+		printk("Bluetooth init failed (err %d)\n", err);
+		return;
+	}
+
+	bt_conn_cb_register(&conn_callbacks);
+	bt_conn_auth_cb_register(&auth_cb_display);
+
+	/* Implement indicate. At the moment there is no suitable way
+	 * of starting delayed work so we do it here
+	 */
+	while (1) {
+		k_sleep(MSEC_PER_SEC);
+
+		/* Temperature measurements simulation */
+		hts_indicate();
+
+		/* Battery level simulation */
+		bas_notify();
+	}
+}