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BLE 연결 파라미터가 이미 목표값인 경우 재요청 생략

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- 요청 전 bt_conn_get_info()로 현재 체결값 조회
- Connection Interval, Supervision Timeout, Slave latency
This commit is contained in:
jhchun
2026-07-15 16:01:49 +09:00
parent 7cccee7cf2
commit 58b5243729
1 changed files with 36 additions and 5 deletions
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src/ble/ble_service.c
+36 -5
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@@ -432,6 +432,7 @@ static int ble_request_preferred_conn_params(bool count_attempt)
.latency = BLE_SLAVE_LATENCY,
.timeout = BLE_CONN_SUP_TIMEOUT,
};
struct bt_conn_info info;
int err;
if (current_conn == NULL)
@@ -439,15 +440,41 @@ static int ble_request_preferred_conn_params(bool count_attempt)
return -ENOTCONN;
}
// 현재 체결된 파라미터를 조회해서, 이미 목표값이면 재요청/재시도 불필요
err = bt_conn_get_info(current_conn, &info);
if ((err == 0) && (info.type == BT_CONN_TYPE_LE))
{
uint16_t cur_interval = info.le.interval;
uint16_t cur_latency = info.le.latency;
uint16_t cur_timeout = info.le.timeout;
DBG_PRINTF("[BLE] Current params: interval=%u(%u.%01ums) latency=%u timeout=%u(%ums)\r\n",
cur_interval,
(cur_interval * 125U) / 100U,
((cur_interval * 125U) % 100U) / 10U,
cur_latency,
cur_timeout,
cur_timeout * 10U);
if (ble_conn_param_is_preferred(cur_interval, cur_latency, cur_timeout))
{
DBG_PRINTF("[BLE] Already at preferred params, skip request\r\n");
return -EALREADY;
}
}
if (count_attempt)
{
conn_param_update_attempts++;
}
DBG_PRINTF("[BLE] Request params: interval=%u latency=%u timeout=%u attempt=%u\r\n",
DBG_PRINTF("[BLE] Request params: interval=%u(%u.%01ums) latency=%u timeout=%u(%ums) attempt=%u\r\n",
BLE_MIN_CONN_INTERVAL,
(BLE_MIN_CONN_INTERVAL * 125U) / 100U,
((BLE_MIN_CONN_INTERVAL * 125U) % 100U) / 10U,
BLE_SLAVE_LATENCY,
BLE_CONN_SUP_TIMEOUT,
BLE_CONN_SUP_TIMEOUT * 10U,
conn_param_update_attempts);
err = bt_conn_le_param_update(current_conn, &conn_param);
@@ -585,13 +612,17 @@ static bool le_param_req(struct bt_conn *conn, struct bt_le_conn_param *param)
return true;
}
static void le_param_updated(struct bt_conn *conn, uint16_t interval,
uint16_t latency, uint16_t timeout)
static void le_param_updated(struct bt_conn *conn, uint16_t interval, uint16_t latency, uint16_t timeout)
{
ARG_UNUSED(conn);
DBG_PRINTF("[BLE] Params: interval=%d latency=%d timeout=%d\r\n",
interval, latency, timeout);
DBG_PRINTF("[BLE] Params: interval=%u(%u.%01ums) latency=%u timeout=%u(%ums)\r\n",
interval,
(interval * 125U) / 100U,
((interval * 125U) % 100U) / 10U,
latency,
timeout,
timeout * 10U);
if (ble_conn_param_is_preferred(interval, latency, timeout))
{