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ublox_spp_service_server: Implementation of the ublox SPP-like profile

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This commit is contained in:
Milanka Ringwald 2018-11-06 15:13:10 +01:00
parent c9d24807fb
commit 733ac1e89f
7 changed files with 598 additions and 6 deletions
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10
example/Makefile.inc
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@ -122,7 +122,7 @@ EXAMPLES = \
gap_inquiry \ gap_inquiry \
gap_le_advertisements \ gap_le_advertisements \
gap_link_keys \ gap_link_keys \
gatt_battery_query \ gatt_battery_query \
gatt_browser \ gatt_browser \
gatt_heart_rate_client \ gatt_heart_rate_client \
hfp_ag_demo \ hfp_ag_demo \
@ -141,6 +141,8 @@ EXAMPLES = \
le_streamer_client \ le_streamer_client \
led_counter \ led_counter \
mod_player \ mod_player \
nordic_spp_le_counter \
nordic_spp_le_streamer \
pbap_client_demo \ pbap_client_demo \
sdp_bnep_query \ sdp_bnep_query \
sdp_general_query \ sdp_general_query \
@ -153,6 +155,7 @@ EXAMPLES = \
spp_counter \ spp_counter \
spp_streamer \ spp_streamer \
spp_streamer_client \ spp_streamer_client \
ublox_spp_le_counter \
EXAMPLES_USING_LE = \ EXAMPLES_USING_LE = \
ancs_client_demo \ ancs_client_demo \
@ -171,6 +174,7 @@ EXAMPLES_USING_LE = \
sm_pairing_central \ sm_pairing_central \
sm_pairing_peripheral \ sm_pairing_peripheral \
spp_and_le_counter \ spp_and_le_counter \
ublox_spp_le_counter \
# .o for .c # .o for .c
CORE_OBJ = $(CORE:.c=.o) CORE_OBJ = $(CORE:.c=.o)
@ -332,6 +336,9 @@ nordic_spp_le_counter: nordic_spp_le_counter.h ${CORE_OBJ} ${COMMON_OBJ} ${ATT_O
nordic_spp_le_streamer: nordic_spp_le_streamer.h ${CORE_OBJ} ${COMMON_OBJ} ${ATT_OBJ} ${GATT_SERVER_OBJ} ${SM_OBJ} nordic_spp_service_server.o nordic_spp_le_streamer.c nordic_spp_le_streamer: nordic_spp_le_streamer.h ${CORE_OBJ} ${COMMON_OBJ} ${ATT_OBJ} ${GATT_SERVER_OBJ} ${SM_OBJ} nordic_spp_service_server.o nordic_spp_le_streamer.c
${CC} $(filter-out nordic_spp_le_streamer.h,$^) ${CFLAGS} ${LDFLAGS} -o $@ ${CC} $(filter-out nordic_spp_le_streamer.h,$^) ${CFLAGS} ${LDFLAGS} -o $@
ublox_spp_le_counter: ublox_spp_le_counter.h ${CORE_OBJ} ${COMMON_OBJ} ${ATT_OBJ} ${GATT_SERVER_OBJ} ${SM_OBJ} ublox_spp_service_server.o ublox_spp_le_counter.c
${CC} $(filter-out ublox_spp_le_counter.h,$^) ${CFLAGS} ${LDFLAGS} -o $@
clean: clean:
rm -f ${EXAMPLES} *_demo rm -f ${EXAMPLES} *_demo
rm -f *.o *.out *.hex *.exe *.wav *.sbc rm -f *.o *.out *.hex *.exe *.wav *.sbc
@ -339,6 +346,7 @@ clean:
rm -f gatt_battery_query.h gatt_browser.h sm_pairing_peripheral.h spp_and_le_streamer.h rm -f gatt_battery_query.h gatt_browser.h sm_pairing_peripheral.h spp_and_le_streamer.h
rm -f le_data_channel_server.h sm_pairing_central.h rm -f le_data_channel_server.h sm_pairing_central.h
rm -f nordic_spp_le_counter.h nordic_spp_le_streamer.h nordic_spp_le_counter nordic_spp_le_streamer rm -f nordic_spp_le_counter.h nordic_spp_le_streamer.h nordic_spp_le_counter nordic_spp_le_streamer
rm -f ublox_spp_le_counter.h ublox_spp_le_counter
rm -f le_streamer_and_counter_client.h le_streamer_and_counter_client rm -f le_streamer_and_counter_client.h le_streamer_and_counter_client
rm -f sco_output.msbc sco_input.msbc rm -f sco_output.msbc sco_input.msbc
rm -rf *.dSYM rm -rf *.dSYM

210
example/ublox_spp_le_counter.c Normal file
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@ -0,0 +1,210 @@
/*
* 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__ "ublox_le_counter.c"
// *****************************************************************************
/* EXAMPLE_START(ublox_le_counter): LE Peripheral - Nordic SPP-like profile
*
*/
// *****************************************************************************
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "ublox_spp_le_counter.h"
#include "btstack.h"
#include "ble/gatt-service/ublox_spp_service_server.h"
#define HEARTBEAT_PERIOD_MS 1000
/* @section Main Application Setup
*
* @text Listing MainConfiguration shows main application code.
* It initializes L2CAP, the Security Manager and configures the ATT Server with the pre-compiled
* ATT Database generated from $ublox_le_counter.gatt$.
* Additionally, it enables the Battery Service Server with the current battery level.
* Finally, it configures the advertisements
* and the heartbeat handler and boots the Bluetooth stack.
* In this example, the Advertisement contains the Flags attribute and the device name.
* The flag 0x06 indicates: LE General Discoverable Mode and BR/EDR not supported.
*/
/* LISTING_START(MainConfiguration): Init L2CAP SM ATT Server and start heartbeat timer */
static btstack_timer_source_t heartbeat;
static hci_con_handle_t con_handle = HCI_CON_HANDLE_INVALID;
static btstack_context_callback_registration_t send_request;
static btstack_packet_callback_registration_t hci_event_callback_registration;
const uint8_t adv_data[] = {
// Flags general discoverable, BR/EDR not supported
2, BLUETOOTH_DATA_TYPE_FLAGS, 0x06,
// Name
9, BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME, 'u', 'B', 'l','o', 'x', 'S', 'P', 'P',
// UUID ...
17, BLUETOOTH_DATA_TYPE_COMPLETE_LIST_OF_128_BIT_SERVICE_CLASS_UUIDS, 0x1, 0xd7, 0xe9, 0x1, 0x4f, 0xf3, 0x44, 0xe7, 0x83, 0x8f, 0xe2, 0x26, 0xb9, 0xe1, 0x56, 0x24,
};
const uint8_t adv_data_len = sizeof(adv_data);
/* LISTING_END */
/*
* @section Heartbeat Handler
*
* @text The heartbeat handler updates the value of the single Characteristic provided in this example,
* and request a ATT_EVENT_CAN_SEND_NOW to send a notification if enabled see Listing heartbeat.
*/
/* LISTING_START(heartbeat): Hearbeat Handler */
static int counter = 0;
static char counter_string[30];
static int counter_string_len;
static void beat(void){
counter++;
counter_string_len = sprintf(counter_string, "BTstack counter %03u", counter);
}
static void ublox_can_send(void * context){
UNUSED(context);
beat();
printf("SEND: %s\n", counter_string);
ublox_spp_service_server_send(con_handle, (uint8_t*) counter_string, counter_string_len);
}
static void heartbeat_handler(struct btstack_timer_source *ts){
if (con_handle != HCI_CON_HANDLE_INVALID) {
send_request.callback = &ublox_can_send;
ublox_spp_service_server_request_can_send_now(&send_request, con_handle);
}
btstack_run_loop_set_timer(ts, HEARTBEAT_PERIOD_MS);
btstack_run_loop_add_timer(ts);
}
/* LISTING_END */
static void ublox_data(hci_con_handle_t handle, const uint8_t * data, uint16_t size){
if (size == 0 && con_handle == HCI_CON_HANDLE_INVALID ){
con_handle = handle;
printf("Connected with handle 0x%04x\n", con_handle);
} else {
printf("RECV: ");
printf_hexdump(data, size);
}
}
static void ublox_flow_control(hci_con_handle_t handle, uint16_t credits){
if (con_handle == HCI_CON_HANDLE_INVALID ){
con_handle = handle;
printf("Connected with handle 0x%04x\n", handle);
}
printf("credits %d\n", credits);
}
/*
* @section Packet Handler
*
* @text The packet handler is used to:
* - stop the counter after a disconnect
*/
/* LISTING_START(packetHandler): Packet Handler */
static void packet_handler (uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
switch (packet_type) {
case HCI_EVENT_PACKET:
switch (hci_event_packet_get_type(packet)) {
case HCI_EVENT_DISCONNECTION_COMPLETE:
con_handle = HCI_CON_HANDLE_INVALID;
break;
default:
break;
}
break;
}
}
/* LISTING_END */
int btstack_main(void);
int btstack_main(void)
{
// register for HCI events
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
l2cap_init();
// setup LE device DB
le_device_db_init();
// setup SM: Display only
sm_init();
// setup ATT server
att_server_init(profile_data, NULL, NULL);
// setup Nordic SPP service
ublox_spp_service_server_init(&ublox_data, &ublox_flow_control);
// setup advertisements
uint16_t adv_int_min = 0x0030;
uint16_t adv_int_max = 0x0030;
uint8_t adv_type = 0;
bd_addr_t null_addr;
memset(null_addr, 0, 6);
gap_advertisements_set_params(adv_int_min, adv_int_max, adv_type, 0, null_addr, 0x07, 0x00);
gap_advertisements_set_data(adv_data_len, (uint8_t*) adv_data);
gap_advertisements_enable(1);
// set one-shot timer
heartbeat.process = &heartbeat_handler;
btstack_run_loop_set_timer(&heartbeat, HEARTBEAT_PERIOD_MS);
btstack_run_loop_add_timer(&heartbeat);
// beat once
beat();
// turn on!
hci_power_control(HCI_POWER_ON);
return 0;
}
/* EXAMPLE_END */

4
example/ublox_spp_le_counter.gatt Normal file
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@ -0,0 +1,4 @@
PRIMARY_SERVICE, GAP_SERVICE
CHARACTERISTIC, GAP_DEVICE_NAME, READ, "uBlox SPP Counter"
#import <ublox_spp_service.gatt>

13
port/libusb/.gitignore vendored
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@ -16,6 +16,7 @@ ble_peripheral_test
bnep_test bnep_test
btstack_link_key_db_fs_a.c btstack_link_key_db_fs_a.c
btstack_link_key_db_fs_b.c btstack_link_key_db_fs_b.c
build*
classic_test classic_test
csr_set_bd_addr csr_set_bd_addr
dut_mode_classic dut_mode_classic
@ -57,6 +58,10 @@ le_streamer_and_counter_client.h
le_streamer_client le_streamer_client
led_counter led_counter
mod_player mod_player
nordic_spp_le_counter
nordic_spp_le_counter.h
nordic_spp_le_streamer
nordic_spp_le_streamer.h
panu_demo panu_demo
pbap_client_demo pbap_client_demo
profile.h profile.h
@ -65,6 +70,7 @@ sco_output*
sdp_bnep_query sdp_bnep_query
sdp_general_query sdp_general_query
sdp_rfcomm_query sdp_rfcomm_query
sine_player
sm_pairing_central sm_pairing_central
sm_pairing_central.h sm_pairing_central.h
sm_pairing_peripheral sm_pairing_peripheral
@ -76,8 +82,5 @@ spp_and_le_streamer.h
spp_counter spp_counter
spp_streamer spp_streamer
spp_streamer_client spp_streamer_client
build* ublox_spp_le_counter
nordic_spp_le_counter ublox_spp_le_counter.h
nordic_spp_le_counter.h
nordic_spp_le_streamer
nordic_spp_le_streamer.h

9
src/ble/gatt-service/ublox_spp_service.gatt Normal file
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@ -0,0 +1,9 @@
// Specification ublox SPP-like profile
// ublox SPP-like
PRIMARY_SERVICE, 2456E1B9-26E2-8F83-E744-F34F01E9D701
// FIFO
CHARACTERISTIC, 2456E1B9-26E2-8F83-E744-F34F01E9D703, DYNAMIC | NOTIFY | INDICATE | WRITE | WRITE_WITHOUT_RESPONSE,
// Credits
CHARACTERISTIC, 2456E1B9-26E2-8F83-E744-F34F01E9D704, DYNAMIC | NOTIFY | INDICATE | WRITE | WRITE_WITHOUT_RESPONSE,

271
src/ble/gatt-service/ublox_spp_service_server.c Normal file
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@ -0,0 +1,271 @@
/*
* Copyright (C) 2018 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__ "ublox_spp_service_server.c"
/**
* Implementation of the ublox SPP-like profile
*
* To use with your application, add '#import <ublox_spp_service.gatt' to your .gatt file
* and call all functions below. All strings and blobs need to stay valid after calling the functions.
*/
#include "btstack_defines.h"
#include "btstack_event.h"
#include "btstack_debug.h"
#include "btstack_util.h"
#include "bluetooth_gatt.h"
#include "hci.h"
#include "ble/att_db.h"
#include "ble/att_server.h"
#include "ble/gatt-service/ublox_spp_service_server.h"
#define UBLOX_SPP_MAX_CREDITS 16
#define UBLOX_SPP_CREDITS_THRESHOLD 8
//
static const uint8_t ublox_spp_profile_uuid128[] = { 0x24, 0x56, 0xE1, 0xB9, 0x26, 0xE2, 0x8F, 0x83, 0xE7, 0x44, 0xF3, 0x4F, 0x01, 0xE9, 0xD7, 0x01 };
static const uint8_t ublox_spp_fifo_uuid128[] = { 0x24, 0x56, 0xE1, 0xB9, 0x26, 0xE2, 0x8F, 0x83, 0xE7, 0x44, 0xF3, 0x4F, 0x01, 0xE9, 0xD7, 0x03 };
static const uint8_t ublox_spp_credits_uuid128[] = { 0x24, 0x56, 0xE1, 0xB9, 0x26, 0xE2, 0x8F, 0x83, 0xE7, 0x44, 0xF3, 0x4F, 0x01, 0xE9, 0xD7, 0x04 };
typedef struct {
hci_con_handle_t con_handle;
// characteristic: FIFO
uint16_t fifo_value_handle;
uint8_t data[20];
// characteristic descriptor: Client Characteristic Configuration
uint16_t fifo_client_configuration_descriptor_handle;
uint16_t fifo_client_configuration_descriptor_value; // none, notify or indicate;
btstack_context_callback_registration_t fifo_callback;
// characteristic: Flow control/credits
uint16_t credits_value_handle;
uint16_t incoming_credits;
uint16_t outgoing_credits;
uint8_t delta_credits;
// characteristic descriptor: Client Characteristic Configuration
uint16_t credits_client_configuration_descriptor_handle;
uint16_t credits_client_configuration_descriptor_value;
btstack_context_callback_registration_t credits_callback;
void (*client_data_callback)(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size);
void (*client_credits_callback)(hci_con_handle_t con_handle, uint16_t credits);
// flow control
btstack_context_callback_registration_t * request;
} ublox_spp_service_t;
static att_service_handler_t ublox_spp_service;
static ublox_spp_service_t ublox_spp;
static int ublox_spp_service_flow_control_enabled(ublox_spp_service_t * instance){
return instance->credits_client_configuration_descriptor_value;
}
static ublox_spp_service_t * ublox_get_instance_for_con_handle(hci_con_handle_t con_handle){
ublox_spp_service_t * instance = &ublox_spp;
if (con_handle == HCI_CON_HANDLE_INVALID) return NULL;
instance->con_handle = con_handle;
return instance;
}
static inline void ublox_spp_service_init_credits(ublox_spp_service_t * instance){
instance->incoming_credits = 0;
instance->outgoing_credits = 0;
instance->delta_credits = UBLOX_SPP_MAX_CREDITS;
}
static uint16_t ublox_spp_service_read_callback(hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint8_t * buffer, uint16_t buffer_size){
UNUSED(offset);
UNUSED(buffer_size);
ublox_spp_service_t * instance = ublox_get_instance_for_con_handle(con_handle);
if (!instance) return 0;
if (attribute_handle == instance->fifo_client_configuration_descriptor_handle){
if (buffer){
little_endian_store_16(buffer, 0, instance->fifo_client_configuration_descriptor_value);
}
return 2;
}
if (attribute_handle == instance->credits_client_configuration_descriptor_handle){
if (buffer){
little_endian_store_16(buffer, 0, instance->credits_client_configuration_descriptor_value);
}
return 2;
}
return 0;
}
static int ublox_spp_service_write_callback(hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t transaction_mode, uint16_t offset, uint8_t *buffer, uint16_t buffer_size){
UNUSED(transaction_mode);
UNUSED(offset);
ublox_spp_service_t * instance = ublox_get_instance_for_con_handle(con_handle);
if (!instance) return 0;
if (attribute_handle == instance->fifo_value_handle){
instance->client_data_callback(con_handle, &buffer[0], buffer_size);
if (!ublox_spp_service_flow_control_enabled(instance)) return 0;
if (!instance->incoming_credits) return 0;
instance->incoming_credits--;
if (instance->incoming_credits < UBLOX_SPP_CREDITS_THRESHOLD){
att_server_request_to_send_notification(&instance->credits_callback, instance->con_handle);
}
}
if (attribute_handle == instance->fifo_client_configuration_descriptor_handle){
if (buffer_size < 2){
return ATT_ERROR_INVALID_OFFSET;
}
instance->fifo_client_configuration_descriptor_value = little_endian_read_16(buffer, 0);
instance->client_data_callback(con_handle, NULL, 0);
}
if (attribute_handle == instance->credits_value_handle){
if (!ublox_spp_service_flow_control_enabled(instance)) return 0;
int8_t credits = (int8_t)buffer[0];
if (credits <= 0) return 0;
instance->outgoing_credits += credits;
if (instance->request){
btstack_context_callback_registration_t * request = instance->request;
instance->request = NULL;
att_server_request_to_send_notification(request, instance->con_handle);
}
}
if (attribute_handle == instance->credits_client_configuration_descriptor_handle){
if (buffer_size < 2){
return ATT_ERROR_INVALID_OFFSET;
}
instance->credits_client_configuration_descriptor_value = little_endian_read_16(buffer, 0);
ublox_spp_service_init_credits(instance);
if (instance->credits_client_configuration_descriptor_value){
att_server_request_to_send_notification(&instance->credits_callback, instance->con_handle);
}
}
return 0;
}
static void ublox_spp_credits_callback(void * context){
ublox_spp_service_t * instance = (ublox_spp_service_t *) context;
if (!instance) return;
instance->delta_credits = UBLOX_SPP_MAX_CREDITS - instance->incoming_credits;
if (instance->delta_credits){
instance->incoming_credits = UBLOX_SPP_MAX_CREDITS;
att_server_notify(instance->con_handle, instance->credits_value_handle, &instance->delta_credits, 1);
}
}
/**
* @brief Init ublox SPP Service Server with ATT DB
* @param callback for tx data from peer
*/
void ublox_spp_service_server_init(void (*client_data_callback)(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size),
void (*client_credits_callback)(hci_con_handle_t con_handle, uint16_t credits)){
ublox_spp_service_t * instance = &ublox_spp;
instance->client_data_callback = client_data_callback;
instance->client_credits_callback = client_credits_callback;
instance->credits_callback.callback = ublox_spp_credits_callback;
instance->credits_callback.context = instance;
ublox_spp_service_init_credits(instance);
// get service handle range
uint16_t start_handle = 0;
uint16_t end_handle = 0xfff;
int service_found = gatt_server_get_get_handle_range_for_service_with_uuid128(ublox_spp_profile_uuid128, &start_handle, &end_handle);
if (!service_found) return;
// get characteristic value handle and client configuration handle
// FIFO
instance->fifo_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid128(start_handle, end_handle, ublox_spp_fifo_uuid128);
instance->fifo_client_configuration_descriptor_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid128(start_handle, end_handle, ublox_spp_fifo_uuid128);
// Credits
instance->credits_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid128(start_handle, end_handle, ublox_spp_credits_uuid128);
instance->credits_client_configuration_descriptor_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid128(start_handle, end_handle, ublox_spp_credits_uuid128);
log_info("FIFO value handle 0x%02x", instance->fifo_value_handle);
log_info("FIFO CCC value handle 0x%02x", instance->fifo_client_configuration_descriptor_handle);
log_info("Credits value handle 0x%02x", instance->credits_value_handle);
log_info("Credits CCC value handle 0x%02x", instance->credits_client_configuration_descriptor_handle);
// register service with ATT Server
ublox_spp_service.start_handle = start_handle;
ublox_spp_service.end_handle = end_handle;
ublox_spp_service.read_callback = &ublox_spp_service_read_callback;
ublox_spp_service.write_callback = &ublox_spp_service_write_callback;
att_server_register_service_handler(&ublox_spp_service);
}
/**
* @brief Queue send request. When called, one packet can be send via ublox_spp_service_send below
* @param request
* @param con_handle
*/
void ublox_spp_service_server_request_can_send_now(btstack_context_callback_registration_t * request, hci_con_handle_t con_handle){
ublox_spp_service_t * instance = &ublox_spp;
if (!ublox_spp_service_flow_control_enabled(instance) || instance->outgoing_credits) {
att_server_request_to_send_notification(request, con_handle);
return;
}
instance->request = request;
}
/**
* @brief Send data
* @param con_handle
* @param data
* @param size
*/
int ublox_spp_service_server_send(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size){
ublox_spp_service_t * instance = &ublox_spp;
if (ublox_spp_service_flow_control_enabled(instance)){
if (instance->outgoing_credits > 0){
instance->outgoing_credits--;
}
}
return att_server_notify(con_handle, instance->fifo_value_handle, &data[0], size);
}

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/*
* Copyright (C) 2018 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
*
*/
#ifndef __UBLOX_SPP_H
#define __UBLOX_SPP_H
#include <stdint.h>
#include "bluetooth.h"
#include "btstack_defines.h"
#if defined __cplusplus
extern "C" {
#endif
/* API_START */
/**
* Implementation of the ublox SPP-like profile
*
* To use with your application, add '#import <ublox_spp_service.gatt' to your .gatt file
* and call all functions below. All strings and blobs need to stay valid after calling the functions.
*/
/**
* @brief Init ublox SPP Service Server with ATT DB
* @param client_data_callback
* @param client_flow_control_callback
*/
void ublox_spp_service_server_init(void (*client_data_callback)(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size),
void (*client_flow_control_callback)(hci_con_handle_t con_handle, uint16_t credits));
/**
* @brief Queue send request. When called, one packet can be send via ublox_spp_service_send below
* @param request
* @param con_handle
*/
void ublox_spp_service_server_request_can_send_now(btstack_context_callback_registration_t * request, hci_con_handle_t con_handle);
/**
* @brief Send data
* @param con_handle
* @param data
* @param size
*/
int ublox_spp_service_server_send(hci_con_handle_t con_handle, const uint8_t * data, uint16_t size);
/* API_END */
#if defined __cplusplus
}
#endif
#endif