slicemk: improve central connection handling

Author: xudongzheng

app/src/split/bluetooth/central.c

@@ -355,12 +355,6 @@ static void split_central_process_connection(struct bt_conn *conn) {
 static bool split_central_eir_found(const bt_addr_le_t *addr) {
     LOG_DBG("Found the split service");
 
-    int slot_idx = reserve_peripheral_slot(addr);
-    if (slot_idx < 0) {
-        LOG_ERR("Failed to reserve peripheral slot (err %d)", slot_idx);
-        return false;
-    }
-
     // Stop scanning so we can connect to the peripheral device.
     LOG_DBG("Stopping peripheral scanning");
     is_scanning = false;
@@ -370,29 +364,24 @@ static bool split_central_eir_found(const bt_addr_le_t *addr) {
         return false;
     }
 
-    struct peripheral_slot *slot = &peripherals[slot_idx];
-
-    slot->conn = bt_conn_lookup_addr_le(BT_ID_DEFAULT, addr);
-    if (slot->conn) {
-        LOG_DBG("Found existing connection");
-        split_central_process_connection(slot->conn);
-        err = bt_conn_le_phy_update(slot->conn, BT_CONN_LE_PHY_PARAM_2M);
-        if (err) {
-            LOG_ERR("Update phy conn failed (err %d)", err);
-        }
-    } else {
-        struct bt_le_conn_param *param = BT_LE_CONN_PARAM(0x0006, 0x0006, 30, 400);
-
-        LOG_DBG("Initiating new connnection");
-
-        err = bt_conn_le_create(addr, BT_CONN_LE_CREATE_CONN, param, &slot->conn);
-        if (err) {
-            LOG_ERR("Create conn failed (err %d) (create conn? 0x%04x)", err,
-                    BT_HCI_OP_LE_CREATE_CONN);
-            start_scan();
-        }
+    int slot_idx = reserve_peripheral_slot(addr);
+    if (slot_idx < 0) {
+        LOG_ERR("Failed to reserve peripheral slot (err %d)", slot_idx);
+		start_scan();
+        return false;
     }
 
+	LOG_DBG("Initiating new connnection");
+	struct bt_le_conn_param *param = BT_LE_CONN_PARAM(6, 6, 399, 900);
+    struct peripheral_slot *slot = &peripherals[slot_idx];
+	err = bt_conn_le_create(addr, BT_CONN_LE_CREATE_CONN, param, &slot->conn);
+	if (err) {
+		LOG_ERR("Create conn failed (err %d) (create conn? 0x%04x)", err,
+				BT_HCI_OP_LE_CREATE_CONN);
+		release_peripheral_slot(slot_idx);
+		start_scan();
+	}
+
     return false;
 }