Add samples.

SConscript

@@ -9,6 +9,8 @@ src = Split('''
     src/chipset.c
     src/hm_dump.c
     porting/init.c
+
+    examples/advertisement.c
 ''')
 
 # For stack choice.

examples/advertisement.c

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2006-2020, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2020/12/31     Bernard      Add license info
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <rtthread.h>
+#include <rtdevice.h>
+
+static uint8_t ad_data[] = { 0x01, 0x08, 0x20, 0x20, 0x14, 0x02, 0x01, 0x06, 0x0d, 
+                    0x09, 0x62, 0x6c, 0x65, 0x68, 0x72, 0x5f, 0x73, 0x65, 0x6e, 
+                    0x73, 0x6f, 0x72, 0x02, 0x0a, 0x00, 0x00, 0x00, 0x00, 0x00, 
+                    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
+
+static uint8_t ad_params[] = { 0x01, 0x06, 0x20, 0x0f, 0x30, 0x00, 0x60, 0x00, 0x00, 
+                    0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x00 };
+
+static uint8_t ad_enable[] = { 0x01, 0x0a, 0x20, 0x01, 0x01 };
+
+static void print_command(uint8_t *buf, uint16_t len)
+{
+    rt_kprintf("CMD => ");
+    for (uint16_t i = 0; i < len; i++) {
+        rt_kprintf("%02X ", buf[i]);
+    }
+    rt_kprintf("\n");
+}
+
+static void print_event(uint8_t *buf, uint16_t len)
+{
+    rt_kprintf("EVT <= ");
+    for (uint16_t i = 0; i < len; i++) {
+        rt_kprintf("%02X ", buf[i]);
+    }
+    rt_kprintf("\n");
+}
+
+static int start_advertisement(int argc, char *argv[])
+{
+    uint8_t recv[50];
+    uint16_t recv_len;
+
+    rt_device_t ble = rt_device_find("uart1");
+    rt_device_open(ble, RT_DEVICE_FLAG_INT_RX);;
+
+    // Set advertisement data
+    print_command(ad_data, sizeof(ad_data));
+    rt_device_write(ble, 0, ad_data, sizeof(ad_data));
+    rt_thread_mdelay(10);
+    recv_len = rt_device_read(ble, 0, recv, sizeof(recv));
+    print_event(recv, recv_len);
+
+    // Set advertisement parameters
+    print_command(ad_params, sizeof(ad_params));
+    rt_device_write(ble, 0, ad_params, sizeof(ad_params));
+    rt_thread_mdelay(10);
+    recv_len = rt_device_read(ble, 0, recv, sizeof(recv));
+    print_event(recv, recv_len);
+
+    // Enable advertisement
+    print_command(ad_enable, sizeof(ad_enable));
+    rt_device_write(ble, 0, ad_enable, sizeof(ad_enable));
+    rt_thread_mdelay(10);
+    recv_len = rt_device_read(ble, 0, recv, sizeof(recv));
+    print_event(recv, recv_len);
+
+    return 0;
+}
+MSH_CMD_EXPORT(start_advertisement, "HM sample");