BLE Controller¶
1 概述¶
panchip ZDK和NDK支持两版BLE Controller，分别是Origin BLE Controller和Spark BLE Controller。用户可以根据项目特点和这两个BLE Controller的特性来选择使用的BLE Controller。Spark BLE Controller 是磐启全新开发的controller，未来主推的方向, 当然SDK也提供了方便的方式让用户能快速在这两个BLE Controller之间切换。
Origin BLE Controller和Spark BLE Controller如何配置选择将在接下来的章节讲解。
2 Origin BLE Controller¶
Origin BLE Controller 也就是SDK0.0.0 到 SDK1.0.0 中一直使用的 Controller，作为从机已有了丰富的量产产品，例如：鼠标，键盘，扫码枪等等。
2.1 Origin BLE Controller 支持Features¶
(1) 支持BLE Core 5.2
(2) 支持LL Encryption
(3) 支持Data Length Exchange
(4) 支持LL Ping
(5) 支持2M PHY/Coded PHY
(6) 支持CSA#2
(7) 支持多达8 connection （这与MCU资源相关）
(8) 支持connection 数任意配置
(9) Extended adv
(10) Extended scan
(11) periodic adv
(12 ) periodic sync
(13) CTE (AOA, AOD)
(11) LL Privacy
3 Spark BLE Controller¶
Spark BLE Controller 是panchip新支持的BLE Controller，它和磐启芯片深度贴合，并深度挖掘芯片自身功能和性能。
3.1 相比Origin BLE Controller，Spark BLE Controller 具有如下优点：¶
更低的功耗
更好的多连接调度器和时间利用率以及数据吞吐率
更好的蓝牙多连接稳定性
支持连接更多的蓝牙设备（多达20个connection，这与MCU资源相关）
更少的资源消耗 （flash 资源）
3.2 Spark BLE Controller支持Featrues:¶
(1) 支持BLE Core 5.0
(2) 支持LL Encryption
(3) 支持Data Length Exchange
(4) 支持LL Ping
(5) 支持2M PHY/Coded PHY
(6) 支持CSA#2
(7) 支持多达20 connection （这与MCU资源相关）
(8) 支持connection 数任意配置
(9) Extended adv (正在适配中)
(10) Extended scan (正在适配中)
(11) LL Privacy（正在适配中）
3.3 Spark BLE Controller的配置¶
3.3.1 磐启ZDK中使用Spark BLE Controller¶
目前，在磐启ZDK中有如下工程默认使用了Spark BLE Controller：
samples_panchip/bluetooth/peripheral_hr
samples_panchip/bluetooth/multi_roles
bluetooth/solutions/electric_meter
使能Spark BLE Controller
如果用户需要使用Spark BLE Controller，需要将宏CONFIG_BT_SPARK_BLE_CONTROLLER_EN设置为y，并rebuild工程。
配置Master和Slave Connection个数
宏CONFIG_BT_CTLR_MAX_MST_CONN用于配置BLE Controller支持的最大Master Connection的个数，默认为1。
宏CONFIG_BT_CTLR_MAX_SLAVE_CONN用于配置BLE Controller支持的最大Slave Connection的个数，默认为1。
小技巧
需要注意的是，上述宏配置影响资源消耗。配置值越大消耗资源越多。因此用户需要根据实际项目需求选择合适的connection个数
配置More Data个数
宏CONFIG_BT_CTLR_MORE_DATA_NUM可以配置单个connection event中最多可以连续传输数据的次数，默认值为4。
小技巧
注：pan108x芯片最多支持单个connection event中传输6次数据。对于多连接来说，需要慎重选择该值。
配置加密时间
宏CONFIG_BT_CTLR_LL_ENC_TIME用于配置LL加密的时间。这个值与DLE和more data有关系。这个值至少是50us，当DLE=251B且more data = 6时，这个值至少是250us。
小技巧
注：这个值不能设置的过大，过大的值将带来功耗的增加
设置本地sleep clock 精度
宏CONFIG_BT_SPARK_BLE_CONTROLLER_LOCAL_SCA用于设置local device sleep clock 精度。
3.3.2 磐启NDK中使用Spark BLE Controller¶
参考之前sample文档的描述。