examples: add NimBLE example, based on nimble/porting/examples/nuttx
It's better to keep this example as part of nuttx-apps instead of relying on an external project
diff --git a/examples/nimble/Kconfig b/examples/nimble/Kconfig
new file mode 100644
index 0000000..1fc5663
--- /dev/null
+++ b/examples/nimble/Kconfig
@@ -0,0 +1,30 @@
+#
+# For a description of the syntax of this configuration file,
+# see the file kconfig-language.txt in the NuttX tools repository.
+#
+
+config EXAMPLES_NIMBLE
+ tristate "NimBLE example"
+ default n
+ ---help---
+ Enable the nimble example
+
+if EXAMPLES_NIMBLE
+
+config EXAMPLES_NIMBLE_PROGNAME
+ string "Program name"
+ default "nimble"
+ ---help---
+ This is the name of the program that will be used when the NSH ELF
+ program is installed.
+
+config EXAMPLES_NIMBLE_PRIORITY
+ int "NimBLE task priority"
+ default 100
+
+config EXAMPLES_NIMBLE_STACKSIZE
+ int "NimBLE stack size"
+ default DEFAULT_TASK_STACKSIZE
+
+endif # EXAMPLES_NIMBLE
+
diff --git a/examples/nimble/Make.defs b/examples/nimble/Make.defs
new file mode 100644
index 0000000..a3be37e
--- /dev/null
+++ b/examples/nimble/Make.defs
@@ -0,0 +1,23 @@
+############################################################################
+# apps/examples/nimble/Make.defs
+#
+# 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.
+#
+############################################################################
+
+ifneq ($(CONFIG_EXAMPLES_NIMBLE),)
+CONFIGURED_APPS += $(APPDIR)/examples/nimble
+endif
diff --git a/examples/nimble/Makefile b/examples/nimble/Makefile
new file mode 100644
index 0000000..4e6a3b7
--- /dev/null
+++ b/examples/nimble/Makefile
@@ -0,0 +1,36 @@
+############################################################################
+# apps/examples/nimble/Makefile
+#
+# 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 $(APPDIR)/Make.defs
+
+# NimBLE built-in application info
+
+PROGNAME = $(CONFIG_EXAMPLES_NIMBLE_PROGNAME)
+PRIORITY = $(CONFIG_EXAMPLES_NIMBLE_PRIORITY)
+STACKSIZE = $(CONFIG_EXAMPLES_NIMBLE_STACKSIZE)
+MODULE = $(CONFIG_EXAMPLES_NIMBLE)
+
+# NimBLE Example
+
+MAINSRC = nimble_main.c
+
+include $(APPDIR)/wireless/bluetooth/nimble/Makefile.nimble
+
+include $(APPDIR)/Application.mk
diff --git a/examples/nimble/nimble_main.c b/examples/nimble/nimble_main.c
new file mode 100644
index 0000000..4bc3d01
--- /dev/null
+++ b/examples/nimble/nimble_main.c
@@ -0,0 +1,322 @@
+/****************************************************************************
+ * apps/examples/nimble/nimble_main.c
+ *
+ * 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.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <sys/boardctl.h>
+#include <assert.h>
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "netutils/netinit.h"
+
+#include "nimble/nimble_npl.h"
+#include "nimble/nimble_port.h"
+
+#include "host/ble_hs.h"
+#include "host/util/util.h"
+
+#include "services/gap/ble_svc_gap.h"
+#include "services/gatt/ble_svc_gatt.h"
+#include "services/ans/ble_svc_ans.h"
+#include "services/ias/ble_svc_ias.h"
+#include "services/lls/ble_svc_lls.h"
+#include "services/tps/ble_svc_tps.h"
+#include "services/gap/ble_svc_gap.h"
+#include "services/bas/ble_svc_bas.h"
+#include "services/dis/ble_svc_dis.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/* Not used now */
+
+#define TASK_DEFAULT_PRIORITY 0
+#define TASK_DEFAULT_STACK NULL
+#define TASK_DEFAULT_STACK_SIZE 0
+
+/****************************************************************************
+ * External Functions Prototypes
+ ****************************************************************************/
+
+void ble_hci_sock_ack_handler(void *param);
+void ble_hci_sock_init(void);
+void ble_hci_sock_set_device(int dev);
+
+/****************************************************************************
+ * Private Functions Prototypes
+ ****************************************************************************/
+
+static void put_ad(uint8_t ad_type, uint8_t ad_len, FAR const void *ad,
+ FAR uint8_t *buf, FAR uint8_t *len);
+static void update_ad(void);
+static void start_advertise(void);
+static int gap_event_cb(FAR struct ble_gap_event *event, FAR void *arg);
+static void app_ble_sync_cb(void);
+static void nimble_host_task(FAR void *param);
+static FAR void *ble_hci_sock_task(FAR void *param);
+static FAR void *ble_host_task(FAR void *param);
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+
+static const char *g_gap_name = "NuttX NimBLE";
+static uint8_t g_own_addr_type;
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: put_ad
+ ****************************************************************************/
+
+static void put_ad(uint8_t ad_type, uint8_t ad_len, FAR const void *ad,
+ FAR uint8_t *buf, FAR uint8_t *len)
+{
+ buf[(*len)++] = ad_len + 1;
+ buf[(*len)++] = ad_type;
+
+ memcpy(&buf[*len], ad, ad_len);
+
+ *len += ad_len;
+}
+
+/****************************************************************************
+ * Name: update_ad
+ ****************************************************************************/
+
+static void update_ad(void)
+{
+ uint8_t ad_flags = BLE_HS_ADV_F_DISC_GEN | BLE_HS_ADV_F_BREDR_UNSUP;
+ uint8_t ad_len = 0;
+ uint8_t ad[BLE_HS_ADV_MAX_SZ];
+
+ put_ad(BLE_HS_ADV_TYPE_FLAGS, 1, &ad_flags, ad, &ad_len);
+ put_ad(BLE_HS_ADV_TYPE_COMP_NAME, sizeof(g_gap_name), g_gap_name,
+ ad, &ad_len);
+
+ ble_gap_adv_set_data(ad, ad_len);
+}
+
+/****************************************************************************
+ * Name: start_advertise
+ ****************************************************************************/
+
+static void start_advertise(void)
+{
+ struct ble_gap_adv_params advp;
+ int rc;
+
+ printf("advertise\n");
+
+ update_ad();
+
+ memset(&advp, 0, sizeof advp);
+ advp.conn_mode = BLE_GAP_CONN_MODE_UND;
+ advp.disc_mode = BLE_GAP_DISC_MODE_GEN;
+ rc = ble_gap_adv_start(g_own_addr_type, NULL, BLE_HS_FOREVER,
+ &advp, gap_event_cb, NULL);
+ assert(rc == 0);
+}
+
+/****************************************************************************
+ * Name: gap_event_cb
+ ****************************************************************************/
+
+static int gap_event_cb(FAR struct ble_gap_event *event, FAR void *arg)
+{
+ switch (event->type)
+ {
+ case BLE_GAP_EVENT_CONNECT:
+ {
+ if (event->connect.status)
+ {
+ start_advertise();
+ }
+ break;
+ }
+
+ case BLE_GAP_EVENT_DISCONNECT:
+ {
+ start_advertise();
+ break;
+ }
+ }
+
+ return 0;
+}
+
+/****************************************************************************
+ * Name: app_ble_sync_cb
+ ****************************************************************************/
+
+static void app_ble_sync_cb(void)
+{
+ ble_addr_t addr;
+ int rc;
+
+ /* Generate new non-resolvable private address */
+
+ rc = ble_hs_id_gen_rnd(1, &addr);
+ assert(rc == 0);
+
+ /* Set generated address */
+
+ rc = ble_hs_id_set_rnd(addr.val);
+ assert(rc == 0);
+
+ rc = ble_hs_util_ensure_addr(0);
+ assert(rc == 0);
+
+ rc = ble_hs_id_infer_auto(0, &g_own_addr_type);
+ assert(rc == 0);
+
+ start_advertise();
+}
+
+/****************************************************************************
+ * Name: nimble_host_task
+ ****************************************************************************/
+
+static void nimble_host_task(FAR void *param)
+{
+ ble_hs_cfg.sync_cb = app_ble_sync_cb;
+ ble_svc_gap_device_name_set(g_gap_name);
+ nimble_port_run();
+}
+
+/****************************************************************************
+ * Name: ble_hci_sock_task
+ ****************************************************************************/
+
+static FAR void *ble_hci_sock_task(FAR void *param)
+{
+ ble_hci_sock_ack_handler(param);
+ return NULL;
+}
+
+/****************************************************************************
+ * Name: ble_host_task
+ ****************************************************************************/
+
+static FAR void *ble_host_task(FAR void *param)
+{
+ nimble_host_task(param);
+ return NULL;
+}
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nimble_main
+ ****************************************************************************/
+
+int main(int argc, FAR char *argv[])
+{
+ struct ble_npl_task s_task_host;
+ struct ble_npl_task s_task_hci;
+ uint8_t batt_level = 0;
+ int ret = 0;
+
+ /* allow to specify custom hci */
+
+ if (argc > 1)
+ {
+ ble_hci_sock_set_device(atoi(argv[1]));
+ }
+
+#ifndef CONFIG_NSH_ARCHINIT
+ /* Perform architecture-specific initialization */
+
+ boardctl(BOARDIOC_INIT, 0);
+#endif
+
+#ifndef CONFIG_NSH_NETINIT
+ /* Bring up the network */
+
+ netinit_bringup();
+#endif
+
+ nimble_port_init();
+ ble_hci_sock_init();
+
+ /* Initialize services */
+
+ ble_svc_gap_init();
+ ble_svc_gatt_init();
+ ble_svc_ans_init();
+ ble_svc_ias_init();
+ ble_svc_lls_init();
+ ble_svc_tps_init();
+ ble_svc_bas_init();
+ ble_svc_dis_init();
+
+ /* Create task which handles HCI socket */
+
+ ret = ble_npl_task_init(&s_task_hci, "hci_sock", ble_hci_sock_task,
+ NULL, TASK_DEFAULT_PRIORITY, BLE_NPL_TIME_FOREVER,
+ TASK_DEFAULT_STACK, TASK_DEFAULT_STACK_SIZE);
+ if (ret != 0)
+ {
+ printf("ERROR: starting hci task: %i\n", ret);
+ }
+
+ /* Create task which handles default event queue for host stack. */
+
+ ret = ble_npl_task_init(&s_task_host, "ble_host", ble_host_task,
+ NULL, TASK_DEFAULT_PRIORITY, BLE_NPL_TIME_FOREVER,
+ TASK_DEFAULT_STACK, TASK_DEFAULT_STACK_SIZE);
+ if (ret != 0)
+ {
+ printf("ERROR: starting ble task: %i\n", ret);
+ }
+
+ while (true)
+ {
+ /* Simulate battery */
+
+ batt_level += 1;
+ if (batt_level > 100)
+ {
+ batt_level = 0;
+ }
+
+ ble_svc_bas_battery_level_set(batt_level);
+
+ sleep(1);
+ }
+
+ return 0;
+}
