JL703N_JL701N-EDR 与 BLE client + server 并行优化 BLE client 的效率

📎 原始文档：https://www.kdocs.cn/l/coRp8KNnvzZ0 JL703N/JL701N-EDR 与 BLE client + server 并行优化 BLE client 的效率

前言

主要针对连接 edr 后开启 BLE scan （legacy ble scan）和 advertising 时，client 难连接上的情况。
也试用于 EDR + BLE Client + TWS page 时的情况，该策略目前支持 SDK：

703 le audio v2.0.0 patch01.07 之后
701 le audio v2.0.0 patch01.12 之后

软件配置

三方协议示例使用 sdk_config.h：

#define TCFG_THIRD_PARTY_PROTOCOLS_ENABLE 1 // 第三方协议配置
#if TCFG_THIRD_PARTY_PROTOCOLS_ENABLE
#define TCFG_THIRD_PARTY_PROTOCOLS_SEL (0 | CUSTOM_DEMO_EN | MULTI_CLIENT_EN) // 第三方协议选择
#endif // TCFG_THIRD_PARTY_PROTOCOLS_ENABLE

lib_btctrler_config.c：

const int config_btctler_le_slave_multilink = 1;

lib_btstack_config.c

const int config_le_hci_connection_num = 2;

使用方法

ble_op_set_leagcy_scan_priority(9); 优先级比 EDR 高
ble_op_set_leagcy_scan_priority(11); 优先级比 EDR 低
ble 优先级高会影响 edr 的连接，需要根据情况调整优先级占用的时间，ble_op_set_leagcy_scan_priority 只在 ble scan 开启的时候才生效

example: 开启 scan 时调整 BLE scan 的优先级
连接后停止
scan 优先级翻转 demo：

#if BLE_DYN_PRIO_PERIOD_ENABLE
typedef struct {
    u16 period_ms;
    u16 high_ms; // 高优先级占用时间，单位ms
    void (*set_high)(void);
    void (*set_low)(void);
    u16 timer_id;
    u8 state;
} duty_cycle_hdl_t;

static void ble_dyn_prio_handler(void *priv)
{
    duty_cycle_hdl_t *hdl = (duty_cycle_hdl_t *)priv;
    hdl->timer_id = 0;
    if (hdl->state) {
        hdl->set_low();
        hdl->state = 0;
        u16 low_time = hdl->period_ms - hdl->high_ms;
        if (low_time > 0) {
            hdl->timer_id = sys_timeout_add(hdl, ble_dyn_prio_handler, low_time);
        }
    } else {
        hdl->set_high();
        hdl->state = 1;
        u16 high_time = hdl->high_ms;
        if (high_time > 0) {
            hdl->timer_id = sys_timeout_add(hdl, ble_dyn_prio_handler, high_time);
        }
    }
}

// 启动动态优先级
static void ble_dyn_prio_start(duty_cycle_hdl_t *hdl)
{
    if (hdl->timer_id) {
        sys_timeout_del(hdl->timer_id);
        hdl->timer_id = 0;
    }
    hdl->state = 1;
    hdl->set_high();
    u16 high_time = hdl->high_ms;
    if (high_time > 0) {
        hdl->timer_id = sys_timeout_add(hdl, ble_dyn_prio_handler, high_time);
        log_info("%s, high_time = %d", __func__, high_time);
    }
}

// 停止动态优先级
static void ble_dyn_prio_stop(duty_cycle_hdl_t *hdl)
{
    if (hdl->timer_id) {
        sys_timeout_del(hdl->timer_id);
        hdl->timer_id = 0;
    }
    hdl->set_low();
    hdl->state = 0;
    log_info("%s", __func__);
}

// 动态调整高优先级时间
static void ble_update_duty_cycle(duty_cycle_hdl_t *hdl, u16 new_high_ms)
{
    hdl->high_ms = new_high_ms;
    ble_dyn_prio_start(hdl);
    log_info("%s, new_high_ms = %d", __func__, new_high_ms);
}

static void ble_set_high_priority(void) { ble_op_set_leagcy_scan_priority(9); }
static void ble_set_low_priority(void) { ble_op_set_leagcy_scan_priority(11); }

static duty_cycle_hdl_t g_dyn_prio_hdl = {
    .period_ms = 500, // 调整该参数控制优先级翻转的频率
    .high_ms = 100,    // 高优先级占有时间，单位ms
    .set_high = ble_set_high_priority,
    .set_low = ble_set_low_priority,
    .timer_id = 0,
    .state = 0,
};

#endif // BLE_DYN_PRIO_PERIOD_ENABLE

其他

BLE scan 周期参数调整：

//搜索 周期大小, 建议 SET_SCAN_INTERVAL > SET_SCAN_WINDOW
#define SET_SCAN_INTERVAL   ADV_SCAN_MS(19) // unit: ms
#define SET_SCAN_WINDOW     ADV_SCAN_MS(17) // unit: ms

BLE Client 连接 server 回连速度:

static u8 pair_reconnect_search_profile = 0;//回连是否搜索profile

static const client_conn_cfg_t client_conn_config = {
    ...
    ...
    .search_uuid_cnt = 0, // 配置不搜索profile，加快回连速度
    ...
    ...
};

client 连接参数参考注：欲要 server 使用主机连接参数，请配置 l2cap_connection_update_request_just 返回 1 拒接 server 的连接参数
默认：

static const struct conn_update_param_t connection_param_table[] = {
    {16, 24, 0, 600},
    {12, 28, 0, 600},
    {8,  20, 0, 600},
    {50, 60, 0, 600},
};

传数据时：

static const struct conn_update_param_t connection_param_table[] = {
    {19, 22, 0, 400},
    {25, 29, 0, 400},
    {31, 35, 0, 400},
};

空闲，低数据传输时：

static const struct conn_update_param_t connection_param_table[] = {
    {190, 220, 0, 600},
    {250, 290, 0, 600},
    {310, 350, 0, 600},
};

如果 Client 回连时常出现 0x08 （超时）断开尝试修改

#define SET_CONN_TIMEOUT   200 //(unit:10ms)