BLE Central and Peripheral¶
1 功能概述¶
此项目演示蓝牙主从一体功能，其实就是整合了ble_central以及ble_peripheral_hr功能。
作为主机：可以直接扫描和连接
ble_peripheral_enc示例，可以直接下载ble_peripheral_enc到另外一块EVB板上。作为从机：其实就是一个
ble_peripheral_hr例程，可以使用手机nrf_connect app与其相连。
作为主机和从机的功能可以同时使用。
2 环境要求¶
board:
pan108x evbuart(option): 用来显示串口log（波特率921600，选项
8n1）
3 编译和烧录¶
例程位置：<home>\nimble\samples\bluetooth\ble_cent_prph\keil
使用keil进行打开项目选择需要的controller进行烧录ble_cent_prph_spark或者ble_cent_prph_spark进行编译烧录。
4 演示说明¶
烧录完成后，如果空中有
ble_peripheral_enc存在，则会主动连接上 。同时使用nrf connect 扫描发发现cent_prph设备，连接上后会出现heartrate service服务。主机log如下：
[15:32:17.967]Try to load HW calibration data.. DONE. - Chip Type : 0x80 - Chip CP Version : None - Chip FT Version : 8 - Chip MAC Address : D0000C0CBBF5 - Chip Flash UID : 32313334320EAC834330FFFFFFFFFFFF - Chip Flash Size : 1024 KB LL Spark Controller Version:b0e99c4 [15:32:18.011]ble_store_config_num_our_secs:0 ble_store_config_num_peer_secs:0 ble_store_config_num_cccds:0 blehr_advertise [15:32:19.216]Connection established handle=0 our_ota_addr_type=0 our_ota_addr=06:05:04:03:06:06 our_id_addr_type=0 our_id_addr=06:05:04:03:06:06 peer_ota_addr_type=0 peer_ota_addr=06:05:04:03:02:01 peer_id_addr_type=0 peer_id_addr=06:05:04:03:02:01 conn_itvl=40 conn_latency=0 supervision_timeout=256 encrypted=0 authenticated=0 bonded=0 /*作为主机连接slave设备*/ [15:32:21.923]Service discovery complete; status=0 conn_handle=0 [15:32:22.021]Read complete; status=0 conn_handle=0 attr_handle=12 value=0x00 Write complete; status=270 conn_handle=0 attr_handle=22 [15:32:22.073]Subscribe complete; status=0 conn_handle=0 attr_handle=20 [15:32:27.516]connection established; status=0 /*作为从机被手机主机连接*/ [15:32:30.908]subscribe event; cur_notify=1 value handle; val_handle=3
从机
ble_peripheral_enclog如下：
[15:32:15.447] Try to load HW calibration data.. DONE.
- Chip Type : 0x80
- Chip CP Version : None
- Chip FT Version : 7
- Chip MAC Address : D0000C06FB6E
- Chip Flash UID : 31373237304A23094330FFFFFFFFFFFF
- Chip Flash Size : 1024 KB
LL Spark Controller Version:b0e99c4
[15:32:15.491] ble_store_config_num_our_secs:0
ble_store_config_num_peer_secs:0
ble_store_config_num_cccds:0
registered service 0x1800 with handle=1
registering characteristic 0x2a00 with def_handle=2 val_handle=3
registering characteristic 0x2a01 with def_handle=4 val_handle=5
registered service 0x1801 with handle=6
registering characteristic 0x2a05 with def_handle=7 val_handle=8
registered service 0x1811 with handle=10
registering characteristic 0x2a47 with def_handle=11 val_handle=12
registering characteristic 0x2a46 with def_handle=13 val_handle=14
registering characteristic 0x2a48 with def_handle=16 val_handle=17
registering characteristic 0x2a45 with def_handle=18 val_handle=19
registering characteristic 0x2a44 with def_handle=21 val_handle=22
registered service 59462f12-9543-9999-12c8-58b459a2712d with handle=23
registering characteristic 33333333-2222-2222-1111-111100000000 with def_handle=24 val_handle=25
registering descriptor 34343434-2323-2323-1212-121201010101 with handle=27
Device Address: 01 02 03 04 05 06
[15:32:19.216] connection established; status=0 handle=1 our_ota_addr_type=0 our_ota_addr=01 02 03 04 05 06
our_id_addr_type=0 our_id_addr=01 02 03 04 05 06
peer_ota_addr_type=0 peer_ota_addr=06 06 03 04 05 06
peer_id_addr_type=0 peer_id_addr=06 06 03 04 05 06
conn_itvl=40 conn_latency=0 supervision_timeout=256 encrypted=0 authenticated=0 bonded=0
[15:32:22.021] subscribe event; conn_handle=1 attr_handle=19 reason=1 prevn=0 curn=1 previ=0 curi=0
具体app功能实现可以参考
BLE Central和BLE Peripheral ENC的文档。多连接相关：
对于controller层,：指示origin controller多连接资源的宏
CONFIG_BT_CTLR_MAX_NUM_OF_STATES； 指示spark controller多连接资源的宏CONFIG_BT_CTLR_MAX_MST_CONN和CONFIG_BT_CTLR_MAX_SLV_CONN.对于host层：
MYNEWT_VAL_BLE_MAX_CONNECTIONS会影响host层的连接资源数量。
5 RAM/Flash资源使用情况¶
Origin Controller:
FLASH: 147.35 KB
SRAM: 37.19 KB
Spark Controller:
FLASH: 109.10 KB
SRAM: 39.04 KB