Core Protocols Comparison#

There are no differences in the following protocols, including GAP, SM, SPP, and L2CAP (CBFC).

L2CAP Classic Comparison#

The following table compares the L2CAP Classic differences between EdgeFast Open Bluetooth Host stack and EdgeFast Bluetooth PAL.

Feature	EdgeFast Open	EdgeFast Bluetooth PAL
Connection-oriented channels in Basic Mode	Supported	Supported
Connection-oriented channels in Retransmission Mode	Supported	Not supported
Connection-oriented channels in Flow control Mode	Supported	Not supported
Connection-oriented channels in Enhanced Retransmission Mode	Supported	Supported
Connection-oriented channels in Streaming Mode	Supported	Supported
Connectionless data channel in Basic L2CAP mode	Supported	Not supported
Signaling packet ECHO	Supported	Not supported

The following compares the L2CAP Classic differences between EdgeFast Open Bluetooth Host stack and EdgeFast Bluetooth PAL.

Aspect	EdgeFast Open	EdgeFast Bluetooth PAL
L2CAP architecture	Zephyr native L2CAP	PAL adds explicit L2CAP config negotiation
Channel config	Static fields in chan.rx.*	Callback‑based config exchange
Mode negotiation	Implicit	Explicit (get_cfg / cfg_req / cfg_rsp)
Who drives config	Local side before connect	Both sides during config phase

L2CAP Classic in EdgeFast Open#

static int l2cap_recv(struct bt_l2cap_chan *chan, struct net_buf *buf)
{
}

static void l2cap_connected(struct bt_l2cap_chan *chan)
{
}

static void l2cap_disconnected(struct bt_l2cap_chan *chan)
{
}

static struct net_buf *l2cap_alloc_buf(struct bt_l2cap_chan *chan)
{
}

#if defined(CONFIG_BT_L2CAP_SEG_RECV)
static void seg_recv(struct bt_l2cap_chan *chan, size_t sdu_len, off_t seg_offset,
		     struct net_buf_simple *seg)
{
}
#endif /* CONFIG_BT_L2CAP_SEG_RECV */

static const struct bt_l2cap_chan_ops l2cap_ops = {
	.alloc_buf = l2cap_alloc_buf,
	.recv = l2cap_recv,
	.connected = l2cap_connected,
	.disconnected = l2cap_disconnected,
#if defined(CONFIG_BT_L2CAP_SEG_RECV)
	.seg_recv = seg_recv,
#endif /* CONFIG_BT_L2CAP_SEG_RECV */
};

static struct bt_l2cap_br_chan chan = {
	.chan.ops = &l2cap_ops,
	.rx.mtu = DATA_BREDR_MTU,
},

chan.rx.mode = <Mode>;
chan.rx.max_transmit = <max_transmit>;
chan.rx.optional = <Mode optional settings>;
chan.rx.extended_control = <extended_control>;
chan.rx.max_window = <max_window>;

int err = bt_l2cap_chan_connect(default_conn, &chan.chan, psm);
if (err < 0) {
	PRINTF("Unable to connect to psm %u (err %d)\n", psm, err);
} else {
	PRINTF("L2CAP connection pending\n");
}

L2CAP Classic in EdgeFast Bluetooth PAL#

void l2cap_mode_get_cfg(struct bt_l2cap_chan *chan, struct bt_l2cap_cfg_options *cfg)
{
	/* Channel configuration handler */
	/* `cfg` argument needs to be filled with the configuration options */
}

void l2cap_mode_cfg_req(struct bt_l2cap_chan *chan, struct bt_l2cap_cfg_options *cfg, struct bt_l2cap_cfg_options *rsp)
{
	/* Channel configuration response handler */
	/* `rsp` argument needs to be filled with the response configuration options */
}

void l2cap_mode_cfg_rsp(struct bt_l2cap_chan *chan, struct bt_l2cap_cfg_options *rsp)
{
	/* Channel configuration response handler */
}

static const struct bt_l2cap_chan_ops l2cap_mode_ops = {
	.alloc_buf	= l2cap_alloc_buf,
	.recv		= l2cap_recv,
	.connected	= l2cap_connected,
	.disconnected	= l2cap_disconnected,
        .get_cfg        = l2cap_mode_get_cfg,
        .cfg_req        = l2cap_mode_cfg_req,
        .cfg_rsp        = l2cap_mode_cfg_rsp
};

static struct bt_l2cap_br_chan chan = {
	.chan.ops = &l2cap_mode_ops,
	.rx.mtu = DATA_BREDR_MTU,
},

int err = bt_l2cap_chan_connect(default_conn, &chan.chan, psm);
if (err < 0) {
	PRINTF("Unable to connect to psm %u (err %d)\n", psm, err);
} else {
	PRINTF("L2CAP connection pending\n");
}

Parent topic:Core Protocols Comparison

SDP#

The following compares the SDP differences between EdgeFast Open Bluetooth Host stack and EdgeFast Bluetooth PAL.

Feature	EdgeFast Open	EdgeFast Bluetooth PAL
SDP record discovery	Support Attribute ID list and range settings	Not supported
SDP record parse	bt_sdp_record_parse	Not supported
Check attribute	bt_sdp_has_attr	Not supported
Parse attribute value	bt_sdp_get_attr bt_sdp_attr_value_parse bt_sdp_attr_has_uuid bt_sdp_attr_read	Not supported
Parse Additional Protocol Descriptor List attribute	bt_sdp_attr_addl_proto_parse bt_sdp_attr_addl_proto_count bt_sdp_attr_addl_proto_read	Not supported

Parent topic:Core Protocols Comparison

Parent topic:Compare with EdgeFast Bluetooth PAL

Core Protocols Comparison

Contents

Core Protocols Comparison#

L2CAP Classic Comparison#

L2CAP Classic in EdgeFast Open#

L2CAP Classic in EdgeFast Bluetooth PAL#

SDP#