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btstack/src/hci_transport_h4.c

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/*
* Copyright (C) 2014 BlueKitchen GmbH
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the copyright holders nor the names of
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
* 4. Any redistribution, use, or modification is done solely for
* personal benefit and not for any commercial purpose or for
* monetary gain.
*
* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* Please inquire about commercial licensing options at
* contact@bluekitchen-gmbh.com
*
*/
#define __BTSTACK_FILE__ "hci_transport_h4.c"
/*
* hci_h4_transport.c
*
* HCI Transport API implementation for H4 protocol over POSIX with optional support for eHCILL
*
* Created by Matthias Ringwald on 4/29/09.
*/
#include <inttypes.h>
#include "btstack_config.h"
#include "btstack_debug.h"
#include "hci.h"
#include "hci_transport.h"
#include "bluetooth_company_id.h"
#include "btstack_uart_block.h"
#define ENABLE_LOG_EHCILL
#ifdef ENABLE_EHCILL
// eHCILL commands
enum EHCILL_MESSAGES {
EHCILL_GO_TO_SLEEP_IND = 0x030,
EHCILL_GO_TO_SLEEP_ACK = 0x031,
EHCILL_WAKE_UP_IND = 0x032,
EHCILL_WAKE_UP_ACK = 0x033,
EHCILL_WAKEUP_SIGNAL = 0x034,
};
static int hci_transport_h4_ehcill_outgoing_packet_ready(void);
static void hci_transport_h4_echill_send_wakeup_ind(void);
static void hci_transport_h4_ehcill_handle_command(uint8_t action);
static void hci_transport_h4_ehcill_handle_ehcill_command_sent(void);
static void hci_transport_h4_ehcill_handle_packet_sent(void);
static void hci_transport_h4_ehcill_open(void);
static void hci_transport_h4_ehcill_reset_statemachine(void);
static void hci_transport_h4_ehcill_send_ehcill_command(void);
static void hci_transport_h4_ehcill_sleep_ack_timer_setup(void);
static void hci_transport_h4_ehcill_trigger_wakeup(void);
typedef enum {
EHCILL_STATE_W2_SEND_SLEEP_ACK,
EHCILL_STATE_SLEEP,
EHCILL_STATE_W4_WAKEUP_IND_OR_ACK,
EHCILL_STATE_AWAKE
} EHCILL_STATE;
// eHCILL state machine
static EHCILL_STATE ehcill_state;
static uint8_t ehcill_command_to_send;
static btstack_uart_sleep_mode_t btstack_uart_sleep_mode;
// work around for eHCILL problem
static btstack_timer_source_t ehcill_sleep_ack_timer;
#endif
// assert pre-buffer for packet type is available
#if !defined(HCI_OUTGOING_PRE_BUFFER_SIZE) || (HCI_OUTGOING_PRE_BUFFER_SIZE == 0)
#error HCI_OUTGOING_PRE_BUFFER_SIZE not defined. Please update hci.h
#endif
static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size);
typedef enum {
H4_W4_PACKET_TYPE,
H4_W4_EVENT_HEADER,
H4_W4_ACL_HEADER,
H4_W4_SCO_HEADER,
H4_W4_PAYLOAD,
} H4_STATE;
typedef enum {
TX_IDLE = 1,
TX_W4_PACKET_SENT,
#ifdef ENABLE_EHCILL
TX_W4_WAKEUP,
TX_W2_EHCILL_SEND,
TX_W4_EHCILL_SENT,
#endif
} TX_STATE;
// UART Driver + Config
static const btstack_uart_block_t * btstack_uart;
static btstack_uart_config_t uart_config;
// write state
static TX_STATE tx_state;
#ifdef ENABLE_EHCILL
static uint8_t * ehcill_tx_data;
static uint16_t ehcill_tx_len; // 0 == no outgoing packet
#endif
static uint8_t packet_sent_event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0};
static void (*packet_handler)(uint8_t packet_type, uint8_t *packet, uint16_t size) = dummy_handler;
// packet reader state machine
static H4_STATE h4_state;
static int bytes_to_read;
static int read_pos;
// incoming packet buffer
static uint8_t hci_packet_with_pre_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + 1 + HCI_PACKET_BUFFER_SIZE]; // packet type + max(acl header + acl payload, event header + event data)
static uint8_t * hci_packet = &hci_packet_with_pre_buffer[HCI_INCOMING_PRE_BUFFER_SIZE];
#ifdef ENABLE_CC256X_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND
static const uint8_t local_version_event_prefix[] = { 0x04, 0x0e, 0x0c, 0x01, 0x01, 0x10};
static const uint8_t baud_rate_command_prefix[] = { 0x01, 0x36, 0xff, 0x04};
static enum {
CC256X_WORKAROUND_IDLE,
CC256X_WORKAROUND_CHIPSET_DETECTED,
CC256X_WORKAROUND_BAUDRATE_COMMAND_SENT,
CC256X_WORKAROUND_DONE
} cc256x_workaround_state;
#endif
static int hci_transport_h4_set_baudrate(uint32_t baudrate){
log_info("hci_transport_h4_set_baudrate %"PRIu32, baudrate);
return btstack_uart->set_baudrate(baudrate);
}
static void hci_transport_h4_reset_statemachine(void){
h4_state = H4_W4_PACKET_TYPE;
read_pos = 0;
bytes_to_read = 1;
}
static void hci_transport_h4_trigger_next_read(void){
// log_info("hci_transport_h4_trigger_next_read: %u bytes", bytes_to_read);
btstack_uart->receive_block(&hci_packet[read_pos], bytes_to_read);
}
static void hci_transport_h4_block_read(void){
read_pos += bytes_to_read;
switch (h4_state) {
case H4_W4_PACKET_TYPE:
switch (hci_packet[0]){
case HCI_EVENT_PACKET:
bytes_to_read = HCI_EVENT_HEADER_SIZE;
h4_state = H4_W4_EVENT_HEADER;
break;
case HCI_ACL_DATA_PACKET:
bytes_to_read = HCI_ACL_HEADER_SIZE;
h4_state = H4_W4_ACL_HEADER;
break;
case HCI_SCO_DATA_PACKET:
bytes_to_read = HCI_SCO_HEADER_SIZE;
h4_state = H4_W4_SCO_HEADER;
break;
#ifdef ENABLE_EHCILL
case EHCILL_GO_TO_SLEEP_IND:
case EHCILL_GO_TO_SLEEP_ACK:
case EHCILL_WAKE_UP_IND:
case EHCILL_WAKE_UP_ACK:
hci_transport_h4_ehcill_handle_command(hci_packet[0]);
hci_transport_h4_reset_statemachine();
break;
#endif
default:
log_error("hci_transport_h4: invalid packet type 0x%02x", hci_packet[0]);
hci_transport_h4_reset_statemachine();
break;
}
break;
case H4_W4_EVENT_HEADER:
bytes_to_read = hci_packet[2];
h4_state = H4_W4_PAYLOAD;
break;
case H4_W4_ACL_HEADER:
bytes_to_read = little_endian_read_16( hci_packet, 3);
// check ACL length
if (HCI_ACL_HEADER_SIZE + bytes_to_read > HCI_PACKET_BUFFER_SIZE){
log_error("hci_transport_h4: invalid ACL payload len %d - only space for %u", bytes_to_read, HCI_PACKET_BUFFER_SIZE - HCI_ACL_HEADER_SIZE);
hci_transport_h4_reset_statemachine();
break;
}
h4_state = H4_W4_PAYLOAD;
break;
case H4_W4_SCO_HEADER:
bytes_to_read = hci_packet[3];
h4_state = H4_W4_PAYLOAD;
break;
case H4_W4_PAYLOAD:
#ifdef ENABLE_CC256X_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND
if (cc256x_workaround_state == CC256X_WORKAROUND_IDLE
&& memcmp(hci_packet, local_version_event_prefix, sizeof(local_version_event_prefix)) == 0){
if (little_endian_read_16(hci_packet, 11) == BLUETOOTH_COMPANY_ID_TEXAS_INSTRUMENTS_INC){
// detect TI CC256x controller based on manufacturer
log_info("Detected CC256x controller");
cc256x_workaround_state = CC256X_WORKAROUND_CHIPSET_DETECTED;
} else {
// work around not needed
log_info("Bluetooth controller not by TI");
cc256x_workaround_state = CC256X_WORKAROUND_DONE;
}
}
#endif
packet_handler(hci_packet[0], &hci_packet[1], read_pos-1);
hci_transport_h4_reset_statemachine();
break;
default:
break;
}
#ifdef ENABLE_CC256X_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND
if (cc256x_workaround_state == CC256X_WORKAROUND_BAUDRATE_COMMAND_SENT){
cc256x_workaround_state = CC256X_WORKAROUND_IDLE;
// avoid flowcontrol problem by reading expected hci command complete event of 7 bytes in a single block read
h4_state = H4_W4_PAYLOAD;
bytes_to_read = 7;
}
#endif
hci_transport_h4_trigger_next_read();
}
static void hci_transport_h4_block_sent(void){
switch (tx_state){
case TX_W4_PACKET_SENT:
// packet fully sent, reset state
#ifdef ENABLE_EHCILL
ehcill_tx_len = 0;
#endif
tx_state = TX_IDLE;
#ifdef ENABLE_EHCILL
// notify eHCILL engine
hci_transport_h4_ehcill_handle_packet_sent();
#endif
// notify upper stack that it can send again
packet_handler(HCI_EVENT_PACKET, &packet_sent_event[0], sizeof(packet_sent_event));
break;
#ifdef ENABLE_EHCILL
case TX_W4_EHCILL_SENT:
case TX_W4_WAKEUP:
hci_transport_h4_ehcill_handle_ehcill_command_sent();
break;
#endif
default:
break;
}
}
static int hci_transport_h4_can_send_now(uint8_t packet_type){
return tx_state == TX_IDLE;
}
static int hci_transport_h4_send_packet(uint8_t packet_type, uint8_t * packet, int size){
// store packet type before actual data and increase size
size++;
packet--;
*packet = packet_type;
#ifdef ENABLE_CC256X_BAUDRATE_CHANGE_FLOWCONTROL_BUG_WORKAROUND
if ((cc256x_workaround_state == CC256X_WORKAROUND_CHIPSET_DETECTED)
&& (memcmp(packet, baud_rate_command_prefix, sizeof(baud_rate_command_prefix)) == 0)) {
log_info("CC256x baud rate command detected, expect command complete event next");
cc256x_workaround_state = CC256X_WORKAROUND_BAUDRATE_COMMAND_SENT;
}
#endif
#ifdef ENABLE_EHCILL
// store request for later
ehcill_tx_len = size;
ehcill_tx_data = packet;
switch (ehcill_state){
case EHCILL_STATE_SLEEP:
hci_transport_h4_ehcill_trigger_wakeup();
return 0;
case EHCILL_STATE_W2_SEND_SLEEP_ACK:
log_info("eHILL: send next packet, state EHCILL_STATE_W2_SEND_SLEEP_ACK");
return 0;
default:
break;
}
#endif
// start sending
tx_state = TX_W4_PACKET_SENT;
btstack_uart->send_block(packet, size);
return 0;
}
static void hci_transport_h4_init(const void * transport_config){
// check for hci_transport_config_uart_t
if (!transport_config) {
log_error("hci_transport_h4: no config!");
return;
}
if (((hci_transport_config_t*)transport_config)->type != HCI_TRANSPORT_CONFIG_UART) {
log_error("hci_transport_h4: config not of type != HCI_TRANSPORT_CONFIG_UART!");
return;
}
// extract UART config from transport config
hci_transport_config_uart_t * hci_transport_config_uart = (hci_transport_config_uart_t*) transport_config;
uart_config.baudrate = hci_transport_config_uart->baudrate_init;
uart_config.flowcontrol = hci_transport_config_uart->flowcontrol;
uart_config.device_name = hci_transport_config_uart->device_name;
// setup UART driver
btstack_uart->init(&uart_config);
btstack_uart->set_block_received(&hci_transport_h4_block_read);
btstack_uart->set_block_sent(&hci_transport_h4_block_sent);
}
static int hci_transport_h4_open(void){
int res = btstack_uart->open();
if (res){
return res;
}
hci_transport_h4_reset_statemachine();
hci_transport_h4_trigger_next_read();
tx_state = TX_IDLE;
#ifdef ENABLE_EHCILL
hci_transport_h4_ehcill_open();
#endif
return 0;
}
static int hci_transport_h4_close(void){
return btstack_uart->close();
}
static void hci_transport_h4_register_packet_handler(void (*handler)(uint8_t packet_type, uint8_t *packet, uint16_t size)){
packet_handler = handler;
}
static void dummy_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){
}
//
// --- main part of eHCILL implementation ---
//
#ifdef ENABLE_EHCILL
static void hci_transport_h4_ehcill_emit_sleep_state(int sleep_active){
static int last_state = 0;
if (sleep_active == last_state) return;
last_state = sleep_active;
log_info("hci_transport_h4_ehcill_emit_sleep_state: %u", sleep_active);
uint8_t event[3];
event[0] = HCI_EVENT_TRANSPORT_SLEEP_MODE;
event[1] = sizeof(event) - 2;
event[2] = sleep_active;
packet_handler(HCI_EVENT_PACKET, &event[0], sizeof(event));
}
static void hci_transport_h4_ehcill_wakeup_handler(void){
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: UART wakeup received");
#endif
hci_transport_h4_ehcill_handle_command(EHCILL_WAKEUP_SIGNAL);
}
static void hci_transport_h4_ehcill_open(void){
hci_transport_h4_ehcill_reset_statemachine();
// find best sleep mode to use: wake on CTS, wake on RX, none
btstack_uart_sleep_mode = BTSTACK_UART_SLEEP_OFF;
int supported_sleep_modes = 0;
if (btstack_uart->get_supported_sleep_modes){
supported_sleep_modes = btstack_uart->get_supported_sleep_modes();
}
if (supported_sleep_modes & BTSTACK_UART_SLEEP_MASK_RTS_HIGH_WAKE_ON_CTS_PULSE){
log_info("eHCILL: using wake on CTS");
btstack_uart_sleep_mode = BTSTACK_UART_SLEEP_RTS_HIGH_WAKE_ON_CTS_PULSE;
} else if (supported_sleep_modes & BTSTACK_UART_SLEEP_MASK_RTS_LOW_WAKE_ON_RX_EDGE){
log_info("eHCILL: using wake on RX");
btstack_uart_sleep_mode = BTSTACK_UART_SLEEP_RTS_LOW_WAKE_ON_RX_EDGE;
} else {
log_info("eHCILL: UART driver does not provide compatible sleep mode");
}
if (btstack_uart->set_wakeup_handler){
btstack_uart->set_wakeup_handler(&hci_transport_h4_ehcill_wakeup_handler);
}
}
static void hci_transport_h4_echill_send_wakeup_ind(void){
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: send WAKEUP_IND");
#endif
// update state
tx_state = TX_W4_WAKEUP;
ehcill_state = EHCILL_STATE_W4_WAKEUP_IND_OR_ACK;
ehcill_command_to_send = EHCILL_WAKE_UP_IND;
btstack_uart->send_block(&ehcill_command_to_send, 1);
}
static int hci_transport_h4_ehcill_outgoing_packet_ready(void){
return ehcill_tx_len != 0;
}
static void hci_transport_h4_ehcill_reset_statemachine(void){
ehcill_state = EHCILL_STATE_AWAKE;
}
static void hci_transport_h4_ehcill_send_ehcill_command(void){
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: send command %02x", ehcill_command_to_send);
#endif
tx_state = TX_W4_EHCILL_SENT;
if (ehcill_command_to_send == EHCILL_GO_TO_SLEEP_ACK){
ehcill_state = EHCILL_STATE_SLEEP;
}
btstack_uart->send_block(&ehcill_command_to_send, 1);
}
static void hci_transport_h4_ehcill_sleep_ack_timer_handler(btstack_timer_source_t * timer){
UNUSED(timer);
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: timer triggered");
#endif
hci_transport_h4_ehcill_send_ehcill_command();
}
static void hci_transport_h4_ehcill_sleep_ack_timer_setup(void){
// setup timer
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: set timer for sending command %02x", ehcill_command_to_send);
#endif
btstack_run_loop_set_timer_handler(&ehcill_sleep_ack_timer, &hci_transport_h4_ehcill_sleep_ack_timer_handler);
btstack_run_loop_set_timer(&ehcill_sleep_ack_timer, 50);
btstack_run_loop_add_timer(&ehcill_sleep_ack_timer);
}
static void hci_transport_h4_ehcill_trigger_wakeup(void){
switch (tx_state){
case TX_W2_EHCILL_SEND:
case TX_W4_EHCILL_SENT:
// wake up / sleep ack in progress, nothing to do now
return;
case TX_IDLE:
default:
// all clear, prepare for wakeup
break;
}
// UART needed again
hci_transport_h4_ehcill_emit_sleep_state(0);
if (btstack_uart_sleep_mode){
btstack_uart->set_sleep(BTSTACK_UART_SLEEP_OFF);
}
hci_transport_h4_echill_send_wakeup_ind();
}
static void hci_transport_h4_ehcill_schedule_ehcill_command(uint8_t command){
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: schedule eHCILL command %02x", command);
#endif
ehcill_command_to_send = command;
switch (tx_state){
case TX_IDLE:
if (ehcill_command_to_send == EHCILL_WAKE_UP_ACK){
// send right away
hci_transport_h4_ehcill_send_ehcill_command();
} else {
// change state so BTstack cannot send and setup timer
tx_state = TX_W2_EHCILL_SEND;
hci_transport_h4_ehcill_sleep_ack_timer_setup();
}
break;
default:
break;
}
}
static void hci_transport_h4_ehcill_handle_command(uint8_t action){
// log_info("hci_transport_h4_ehcill_handle: %x, state %u, defer_rx %u", action, ehcill_state, ehcill_defer_rx_size);
switch(ehcill_state){
case EHCILL_STATE_AWAKE:
switch(action){
case EHCILL_GO_TO_SLEEP_IND:
ehcill_state = EHCILL_STATE_W2_SEND_SLEEP_ACK;
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: Received GO_TO_SLEEP_IND RX");
#endif
hci_transport_h4_ehcill_schedule_ehcill_command(EHCILL_GO_TO_SLEEP_ACK);
break;
default:
break;
}
break;
case EHCILL_STATE_W2_SEND_SLEEP_ACK:
switch(action){
case EHCILL_WAKE_UP_IND:
ehcill_state = EHCILL_STATE_AWAKE;
hci_transport_h4_ehcill_emit_sleep_state(0);
if (btstack_uart_sleep_mode){
btstack_uart->set_sleep(BTSTACK_UART_SLEEP_OFF);
}
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: Received WAKE_UP_IND RX");
#endif
hci_transport_h4_ehcill_schedule_ehcill_command(EHCILL_WAKE_UP_ACK);
break;
default:
break;
}
break;
case EHCILL_STATE_SLEEP:
switch(action){
case EHCILL_WAKEUP_SIGNAL:
hci_transport_h4_ehcill_emit_sleep_state(0);
if (btstack_uart_sleep_mode){
btstack_uart->set_sleep(BTSTACK_UART_SLEEP_OFF);
}
break;
case EHCILL_WAKE_UP_IND:
ehcill_state = EHCILL_STATE_AWAKE;
hci_transport_h4_ehcill_emit_sleep_state(0);
if (btstack_uart_sleep_mode){
btstack_uart->set_sleep(BTSTACK_UART_SLEEP_OFF);
}
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: Received WAKE_UP_IND RX");
#endif
hci_transport_h4_ehcill_schedule_ehcill_command(EHCILL_WAKE_UP_ACK);
break;
default:
break;
}
break;
case EHCILL_STATE_W4_WAKEUP_IND_OR_ACK:
switch(action){
case EHCILL_WAKE_UP_IND:
case EHCILL_WAKE_UP_ACK:
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: Received WAKE_UP (%02x)", action);
#endif
tx_state = TX_W4_PACKET_SENT;
ehcill_state = EHCILL_STATE_AWAKE;
btstack_uart->send_block(ehcill_tx_data, ehcill_tx_len);
break;
default:
break;
}
break;
}
}
static void hci_transport_h4_ehcill_handle_packet_sent(void){
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: handle packet sent, command to send %02x", ehcill_command_to_send);
#endif
// now, send pending ehcill command if neccessary
switch (ehcill_command_to_send){
case EHCILL_GO_TO_SLEEP_ACK:
hci_transport_h4_ehcill_sleep_ack_timer_setup();
break;
case EHCILL_WAKE_UP_IND:
hci_transport_h4_ehcill_send_ehcill_command();
break;
default:
break;
}
}
static void hci_transport_h4_ehcill_handle_ehcill_command_sent(void){
tx_state = TX_IDLE;
int command = ehcill_command_to_send;
ehcill_command_to_send = 0;
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: handle eHCILL sent, command was %02x", command);
#endif
if (command == EHCILL_GO_TO_SLEEP_ACK) {
#ifdef ENABLE_LOG_EHCILL
log_info("eHCILL: GO_TO_SLEEP_ACK sent, enter sleep mode");
#endif
// UART not needed after EHCILL_GO_TO_SLEEP_ACK was sent
if (btstack_uart_sleep_mode != BTSTACK_UART_SLEEP_OFF){
btstack_uart->set_sleep(btstack_uart_sleep_mode);
}
hci_transport_h4_ehcill_emit_sleep_state(1);
}
// already packet ready? then start wakeup
if (hci_transport_h4_ehcill_outgoing_packet_ready()){
hci_transport_h4_ehcill_emit_sleep_state(0);
if (btstack_uart_sleep_mode != BTSTACK_UART_SLEEP_OFF){
btstack_uart->set_sleep(BTSTACK_UART_SLEEP_OFF);
}
if (command != EHCILL_WAKE_UP_IND){
hci_transport_h4_echill_send_wakeup_ind();
}
}
}
#endif
// --- end of eHCILL implementation ---------
static const hci_transport_t hci_transport_h4 = {
/* const char * name; */ "H4",
/* void (*init) (const void *transport_config); */ &hci_transport_h4_init,
/* int (*open)(void); */ &hci_transport_h4_open,
/* int (*close)(void); */ &hci_transport_h4_close,
/* void (*register_packet_handler)(void (*handler)(...); */ &hci_transport_h4_register_packet_handler,
/* int (*can_send_packet_now)(uint8_t packet_type); */ &hci_transport_h4_can_send_now,
/* int (*send_packet)(...); */ &hci_transport_h4_send_packet,
/* int (*set_baudrate)(uint32_t baudrate); */ &hci_transport_h4_set_baudrate,
/* void (*reset_link)(void); */ NULL,
/* void (*set_sco_config)(uint16_t voice_setting, int num_connections); */ NULL,
};
// configure and return h4 singleton
const hci_transport_t * hci_transport_h4_instance(const btstack_uart_block_t * uart_driver) {
btstack_uart = uart_driver;
return &hci_transport_h4;
}
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