static void packet_handler (void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
//printf("packet_handler type %u, packet[0] %x\n", packet_type, packet[0]);
if (packet_type == RFCOMM_DATA_PACKET){
// skip over leading newline
while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){
size--;
packet++;
}
if (strncmp((char *)packet, HSP_AG_RING, strlen(HSP_AG_RING)) == 0){
emit_ring_event();
} else if (strncmp((char *)packet, HSP_AG_OK, strlen(HSP_AG_OK)) == 0){
wait_ok = 0;
} else if (strncmp((char *)packet, HSP_MICROPHONE_GAIN, strlen(HSP_MICROPHONE_GAIN)) == 0){
uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_MICROPHONE_GAIN)]);
emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain);
} else if (strncmp((char *)packet, HSP_SPEAKER_GAIN, strlen(HSP_SPEAKER_GAIN)) == 0){
uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_SPEAKER_GAIN)]);
emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain);
} else {
if (!hsp_hs_callback) return;
// strip trailing newline
while (size > 0 && (packet[size-1] == '\n' || packet[size-1] == '\r')){
size--;
}
// add trailing \0
packet[size] = 0;
// re-use incoming buffer to avoid reserving large buffers - ugly but efficient
uint8_t * event = packet - 4;
event[0] = HCI_EVENT_HSP_META;
event[1] = size + 2;
event[2] = HSP_SUBEVENT_AG_INDICATION;
event[3] = size;
(*hsp_hs_callback)(event, size+4);
}
hsp_run();
return;
}
if (packet_type != HCI_EVENT_PACKET) return;
uint8_t event = packet[0];
bd_addr_t event_addr;
uint16_t handle;
switch (event) {
case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{
if (hsp_state < HSP_RFCOMM_CONNECTION_ESTABLISHED) return;
int index = 2;
uint8_t status = packet[index++];
sco_handle = READ_BT_16(packet, index);
index+=2;
bd_addr_t address;
memcpy(address, &packet[index], 6);
index+=6;
uint8_t link_type = packet[index++];
uint8_t transmission_interval = packet[index++]; // measured in slots
uint8_t retransmission_interval = packet[index++];// measured in slots
uint16_t rx_packet_length = READ_BT_16(packet, index); // measured in bytes
index+=2;
uint16_t tx_packet_length = READ_BT_16(packet, index); // measured in bytes
index+=2;
uint8_t air_mode = packet[index];
if (status != 0){
log_error("(e)SCO Connection failed, status %u", status);
emit_event_audio_connected(status, sco_handle);
hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED ;
break;
}
switch (link_type){
case 0x00:
log_info("SCO Connection established.");
if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval);
if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval);
if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length);
if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length);
break;
case 0x02:
log_info("eSCO Connection established.");
break;
default:
log_error("(e)SCO reserved link_type 0x%2x", link_type);
break;
}
log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, "
" rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle,
bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode);
// forward event to app
hsp_hs_callback(packet, size);
hsp_state = HSP_AUDIO_CONNECTION_ESTABLISHED;
emit_event_audio_connected(status, sco_handle);
break;
}
case RFCOMM_EVENT_INCOMING_CONNECTION:
// data: event (8), len(8), address(48), channel (8), rfcomm_cid (16)
if (hsp_state != HSP_IDLE) return;
bt_flip_addr(event_addr, &packet[2]);
rfcomm_cid = READ_BT_16(packet, 9);
log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr));
hsp_state = HSP_W4_RFCOMM_CONNECTED;
rfcomm_accept_connection_internal(rfcomm_cid);
break;
case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE:
// printf("RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE packet_handler type %u, packet[0] %x\n", packet_type, packet[0]);
// data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16)
if (hsp_state != HSP_W4_RFCOMM_CONNECTED) return;
if (packet[2]) {
log_info("RFCOMM channel open failed, status %u", packet[2]);
hsp_state = HSP_IDLE;
hsp_hs_reset_state();
} else {
// data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16)
rfcomm_handle = READ_BT_16(packet, 9);
rfcomm_cid = READ_BT_16(packet, 12);
mtu = READ_BT_16(packet, 14);
log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, handle %02x", rfcomm_cid, mtu, rfcomm_handle);
hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED;
}
emit_event(HSP_SUBEVENT_RFCOMM_CONNECTION_COMPLETE, packet[2]);
break;
case BTSTACK_EVENT_STATE:
case DAEMON_EVENT_HCI_PACKET_SENT:
case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:
case RFCOMM_EVENT_CREDITS:
hsp_hs_callback(packet, size);
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
handle = READ_BT_16(packet,3);
if (handle == sco_handle){
sco_handle = 0;
hsp_state = HSP_RFCOMM_CONNECTION_ESTABLISHED;
emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0);
break;
}
if (handle == rfcomm_handle) {
rfcomm_handle = 0;
hsp_state = HSP_IDLE;
emit_event(HSP_SUBEVENT_RFCOMM_DISCONNECTION_COMPLETE,0);
hsp_hs_reset_state();
}
break;
case RFCOMM_EVENT_CHANNEL_CLOSED:
hsp_hs_reset_state();
hsp_hs_callback(packet, size);
break;
default:
break;
}
hsp_run();
}
static void packet_handler (void * connection, uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
// log_info("packet_handler type %u, packet[0] %x", packet_type, packet[0]);
if (packet_type == RFCOMM_DATA_PACKET){
while (size > 0 && (packet[0] == '\n' || packet[0] == '\r')){
size--;
packet++;
}
if (strncmp((char *)packet, HSP_HS_BUTTON_PRESS, strlen(HSP_HS_BUTTON_PRESS)) == 0){
log_info("Received button press %s", HSP_HS_BUTTON_PRESS);
ag_num_button_press_received++;
ag_send_ok = 1;
if (hsp_state == HSP_ACTIVE && ag_num_button_press_received >=2){
ag_num_button_press_received = 0;
hsp_state = HSP_W2_DISCONNECT_SCO;
}
} else if (strncmp((char *)packet, HSP_HS_MICROPHONE_GAIN, strlen(HSP_HS_MICROPHONE_GAIN)) == 0){
uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_MICROPHONE_GAIN)]);
ag_send_ok = 1;
emit_event(HSP_SUBEVENT_MICROPHONE_GAIN_CHANGED, gain);
} else if (strncmp((char *)packet, HSP_HS_SPEAKER_GAIN, strlen(HSP_HS_SPEAKER_GAIN)) == 0){
uint8_t gain = (uint8_t)atoi((char*)&packet[strlen(HSP_HS_SPEAKER_GAIN)]);
ag_send_ok = 1;
emit_event(HSP_SUBEVENT_SPEAKER_GAIN_CHANGED, gain);
} else if (strncmp((char *)packet, "AT+", 3) == 0){
ag_send_error = 1;
if (!hsp_ag_callback) return;
// re-use incoming buffer to avoid reserving large buffers - ugly but efficient
uint8_t * event = packet - 4;
event[0] = HCI_EVENT_HSP_META;
event[1] = size + 2;
event[2] = HSP_SUBEVENT_HS_COMMAND;
event[3] = size;
(*hsp_ag_callback)(event, size+4);
}
hsp_run();
return;
}
if (packet_type != HCI_EVENT_PACKET) return;
uint8_t event = packet[0];
bd_addr_t event_addr;
uint16_t handle;
switch (event) {
case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE:{
int index = 2;
uint8_t status = packet[index++];
sco_handle = READ_BT_16(packet, index);
index+=2;
bd_addr_t address;
memcpy(address, &packet[index], 6);
index+=6;
uint8_t link_type = packet[index++];
uint8_t transmission_interval = packet[index++]; // measured in slots
uint8_t retransmission_interval = packet[index++];// measured in slots
uint16_t rx_packet_length = READ_BT_16(packet, index); // measured in bytes
index+=2;
uint16_t tx_packet_length = READ_BT_16(packet, index); // measured in bytes
index+=2;
uint8_t air_mode = packet[index];
if (status != 0){
log_error("(e)SCO Connection failed, status %u", status);
emit_event_audio_connected(status, sco_handle);
break;
}
switch (link_type){
case 0x00:
log_info("SCO Connection established.");
if (transmission_interval != 0) log_error("SCO Connection: transmission_interval not zero: %d.", transmission_interval);
if (retransmission_interval != 0) log_error("SCO Connection: retransmission_interval not zero: %d.", retransmission_interval);
if (rx_packet_length != 0) log_error("SCO Connection: rx_packet_length not zero: %d.", rx_packet_length);
if (tx_packet_length != 0) log_error("SCO Connection: tx_packet_length not zero: %d.", tx_packet_length);
break;
case 0x02:
log_info("eSCO Connection established.");
break;
default:
log_error("(e)SCO reserved link_type 0x%2x", link_type);
break;
}
log_info("sco_handle 0x%2x, address %s, transmission_interval %u slots, retransmission_interval %u slots, "
" rx_packet_length %u bytes, tx_packet_length %u bytes, air_mode 0x%2x (0x02 == CVSD)", sco_handle,
bd_addr_to_str(address), transmission_interval, retransmission_interval, rx_packet_length, tx_packet_length, air_mode);
if (hsp_state == HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN){
hsp_state = HSP_W2_DISCONNECT_SCO;
break;
}
hsp_state = HSP_ACTIVE;
emit_event_audio_connected(status, sco_handle);
break;
}
case RFCOMM_EVENT_INCOMING_CONNECTION:
// data: event (8), len(8), address(48), channel (8), rfcomm_cid (16)
if (hsp_state != HSP_IDLE) return;
bt_flip_addr(event_addr, &packet[2]);
rfcomm_cid = READ_BT_16(packet, 9);
log_info("RFCOMM channel %u requested for %s", packet[8], bd_addr_to_str(event_addr));
rfcomm_accept_connection_internal(rfcomm_cid);
hsp_state = HSP_W4_RFCOMM_CONNECTED;
break;
case RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE:
log_info("RFCOMM_EVENT_OPEN_CHANNEL_COMPLETE packet_handler type %u, packet[0] %x", packet_type, packet[0]);
// data: event(8), len(8), status (8), address (48), handle(16), server channel(8), rfcomm_cid(16), max frame size(16)
if (packet[2]) {
log_info("RFCOMM channel open failed, status %u§", packet[2]);
hsp_ag_reset_state();
emit_event(HSP_SUBEVENT_AUDIO_CONNECTION_COMPLETE, packet[2]);
} else {
// data: event(8) , len(8), status (8), address (48), handle (16), server channel(8), rfcomm_cid(16), max frame size(16)
rfcomm_handle = READ_BT_16(packet, 9);
rfcomm_cid = READ_BT_16(packet, 12);
mtu = READ_BT_16(packet, 14);
log_info("RFCOMM channel open succeeded. New RFCOMM Channel ID %u, max frame size %u, state %d", rfcomm_cid, mtu, hsp_state);
switch (hsp_state){
case HSP_W4_RFCOMM_CONNECTED:
ag_num_button_press_received = 0;
hsp_state = HSP_W2_CONNECT_SCO;
break;
case HSP_W4_CONNECTION_ESTABLISHED_TO_SHUTDOWN:
hsp_state = HSP_W2_DISCONNECT_RFCOMM;
break;
default:
log_error("no valid state");
break;
}
}
break;
case DAEMON_EVENT_HCI_PACKET_SENT:
case RFCOMM_EVENT_CREDITS:
break;
case HCI_EVENT_DISCONNECTION_COMPLETE:
handle = READ_BT_16(packet,3);
if (handle == sco_handle){
log_info("SCO disconnected, w2 disconnect RFCOMM");
sco_handle = 0;
hsp_state = HSP_W2_DISCONNECT_RFCOMM;
break;
}
break;
case RFCOMM_EVENT_CHANNEL_CLOSED:
log_info("RFCOMM channel closed");
hsp_ag_reset_state();
emit_event(HSP_SUBEVENT_AUDIO_DISCONNECTION_COMPLETE,0);
break;
default:
break;
}
hsp_run();
}
