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src/ble/gatt-service/cycling_power_service_server.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 BLUEKITCHEN
* GMBH 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__ "cycling_power_service_server.c"
#include "bluetooth.h"
#include "btstack_defines.h"
#include "bluetooth_data_types.h"
#include "btstack_event.h"
#include "ble/att_db.h"
#include "ble/att_server.h"
#include "btstack_util.h"
#include "bluetooth_gatt.h"
#include "btstack_debug.h"
#include "l2cap.h"
#include "hci.h"
#include "ble/gatt-service/cycling_power_service_server.h"
#define CYCLING_POWER_MAX_BROACAST_MSG_SIZE 31
#define CONTROL_POINT_PROCEDURE_TIMEOUT_MS 30
#define CYCLING_POWER_MEASUREMENT_FLAGS_CLEARED 0xFFFF
typedef enum {
CP_MASK_BIT_PEDAL_POWER_BALANCE = 0,
CP_MASK_BIT_ACCUMULATED_TORQUE,
CP_MASK_BIT_WHEEL_REVOLUTION_DATA,
CP_MASK_BIT_CRANK_REVOLUTION_DATA,
CP_MASK_BIT_EXTREME_MAGNITUDES,
CP_MASK_BIT_EXTREME_ANGLES,
CP_MASK_BIT_TOP_DEAD_SPOT_ANGLE,
CP_MASK_BIT_BOTTOM_DEAD_SPOT_ANGLE,
CP_MASK_BIT_ACCUMULATED_ENERGY,
CP_MASK_BIT_RESERVED
} cycling_power_mask_bit_t;
typedef enum {
CP_OPCODE_IDLE = 0,
CP_OPCODE_SET_CUMULATIVE_VALUE,
CP_OPCODE_UPDATE_SENSOR_LOCATION,
CP_OPCODE_REQUEST_SUPPORTED_SENSOR_LOCATIONS,
CP_OPCODE_SET_CRANK_LENGTH,
CP_OPCODE_REQUEST_CRANK_LENGTH,
CP_OPCODE_SET_CHAIN_LENGTH,
CP_OPCODE_REQUEST_CHAIN_LENGTH,
CP_OPCODE_SET_CHAIN_WEIGHT,
CP_OPCODE_REQUEST_CHAIN_WEIGHT,
CP_OPCODE_SET_SPAN_LENGTH,
CP_OPCODE_REQUEST_SPAN_LENGTH,
CP_OPCODE_START_OFFSET_COMPENSATION,
CP_OPCODE_MASK_CYCLING_POWER_MEASUREMENT_CHARACTERISTIC_CONTENT,
CP_OPCODE_REQUEST_SAMPLING_RATE,
CP_OPCODE_REQUEST_FACTORY_CALIBRATION_DATE,
CP_OPCODE_START_ENHANCED_OFFSET_COMPENSATION,
CP_OPCODE_RESPONSE_CODE = 32
} cycling_power_opcode_t;
typedef enum {
CP_RESPONSE_VALUE_SUCCESS = 1,
CP_RESPONSE_VALUE_OP_CODE_NOT_SUPPORTED,
CP_RESPONSE_VALUE_INVALID_PARAMETER,
CP_RESPONSE_VALUE_OPERATION_FAILED,
CP_RESPONSE_VALUE_NOT_AVAILABLE,
CP_RESPONSE_VALUE_W4_VALUE_AVAILABLE
} cycling_power_response_value_t;
typedef enum {
CP_CONNECTION_INTERVAL_STATUS_NONE = 0,
CP_CONNECTION_INTERVAL_STATUS_RECEIVED,
CP_CONNECTION_INTERVAL_STATUS_ACCEPTED,
CP_CONNECTION_INTERVAL_STATUS_W4_L2CAP_RESPONSE,
CP_CONNECTION_INTERVAL_STATUS_W4_UPDATE,
CP_CONNECTION_INTERVAL_STATUS_REJECTED
} cycling_power_con_interval_status_t;
typedef struct {
hci_con_handle_t con_handle;
// GATT connection management
uint16_t con_interval;
uint16_t con_interval_min;
uint16_t con_interval_max;
cycling_power_con_interval_status_t con_interval_status;
// Cycling Power Measurement
uint16_t measurement_value_handle;
int16_t instantaneous_power_W;
cycling_power_pedal_power_balance_reference_t pedal_power_balance_reference;
uint8_t pedal_power_balance_percentage; // percentage, resolution 1/2,
// If the sensor provides the power balance referenced to the left pedal,
// the power balance is calculated as [LeftPower/(LeftPower + RightPower)]*100 in units of percent
cycling_power_torque_source_t torque_source;
uint16_t accumulated_torque_Nm; // newton-meters, resolution 1/32,
// The Accumulated Torque value may decrease
// wheel revolution data:
uint32_t cumulative_wheel_revolutions; // CANNOT roll over
uint16_t last_wheel_event_time_s; // seconds, resolution 1/2048
// crank revolution data:
uint16_t cumulative_crank_revolutions;
uint16_t last_crank_event_time_s; // seconds, resolution 1/1024
// extreme force magnitudes
int16_t maximum_force_magnitude_N;
int16_t minimum_force_magnitude_N;
int16_t maximum_torque_magnitude_Nm; // newton-meters, resolution 1/32
int16_t minimum_torque_magnitude_Nm; // newton-meters, resolution 1/32
// extreme angles
uint16_t maximum_angle_degree; // 12bit, degrees
uint16_t minimum_angle_degree; // 12bit, degrees, concatenated with previous into 3 octets
// i.e. if the Maximum Angle is 0xABC and the Minimum Angle is 0x123, the transmitted value is 0x123ABC.
uint16_t top_dead_spot_angle_degree;
uint16_t bottom_dead_spot_angle_degree; // The Bottom Dead Spot Angle field represents the crank angle when the value of the Instantaneous Power value becomes negative.
uint16_t accumulated_energy_kJ; // kilojoules; CANNOT roll over
// uint8_t offset_compensation;
// CP Measurement Notification (Client Characteristic Configuration)
uint16_t measurement_client_configuration_descriptor_handle;
uint16_t measurement_client_configuration_descriptor_notify;
btstack_context_callback_registration_t measurement_notify_callback;
// CP Measurement Broadcast (Server Characteristic Configuration)
uint16_t measurement_server_configuration_descriptor_handle;
uint16_t measurement_server_configuration_descriptor_broadcast;
btstack_context_callback_registration_t measurement_broadcast_callback;
// Cycling Power Feature
uint16_t feature_value_handle;
uint32_t feature_flags; // see cycling_power_feature_flag_t
uint16_t masked_measurement_flags;
uint16_t default_measurement_flags;
// Sensor Location
uint16_t sensor_location_value_handle;
cycling_power_sensor_location_t sensor_location; // see cycling_power_sensor_location_t
cycling_power_sensor_location_t * supported_sensor_locations;
uint16_t num_supported_sensor_locations;
uint16_t crank_length_mm; // resolution 1/2 mm
uint16_t chain_length_mm; // resolution 1 mm
uint16_t chain_weight_g; // resolution 1 gram
uint16_t span_length_mm; // resolution 1 mm
gatt_date_time_t factory_calibration_date;
uint8_t sampling_rate_Hz; // resolution 1 Herz
int16_t current_force_magnitude_N;
int16_t current_torque_magnitude_Nm; // newton-meters, resolution 1/32
uint16_t manufacturer_company_id;
uint8_t num_manufacturer_specific_data;
uint8_t * manufacturer_specific_data;
// Cycling Power Vector
uint16_t vector_value_handle;
uint16_t vector_cumulative_crank_revolutions;
uint16_t vector_last_crank_event_time_s; // seconds, resolution 1/1024
uint16_t vector_first_crank_measurement_angle_degree;
int16_t * vector_instantaneous_force_magnitude_N_array; // newton
int force_magnitude_count;
int16_t * vector_instantaneous_torque_magnitude_Nm_array; // newton-meter, resolution 1/32
int torque_magnitude_count;
cycling_power_instantaneous_measurement_direction_t vector_instantaneous_measurement_direction;
// CP Vector Notification (Client Characteristic Configuration)
uint16_t vector_client_configuration_descriptor_handle;
uint16_t vector_client_configuration_descriptor_notify;
btstack_context_callback_registration_t vector_notify_callback;
// CP Control Point
uint16_t control_point_value_handle;
// CP Control Point Indication (Client Characteristic Configuration)
uint16_t control_point_client_configuration_descriptor_handle;
uint16_t control_point_client_configuration_descriptor_indicate;
btstack_context_callback_registration_t control_point_indicate_callback;
cycling_power_opcode_t request_opcode;
cycling_power_response_value_t response_value;
btstack_packet_handler_t calibration_callback;
uint8_t w4_indication_complete;
} cycling_power_t;
static att_service_handler_t cycling_power_service;
static cycling_power_t cycling_power;
static btstack_packet_callback_registration_t hci_event_callback_registration;
static btstack_packet_callback_registration_t l2cap_event_callback_registration;
static uint16_t cycling_power_service_read_callback(hci_con_handle_t con_handle, uint16_t attribute_handle, uint16_t offset, uint8_t * buffer, uint16_t buffer_size){
UNUSED(con_handle);
UNUSED(attribute_handle);
UNUSED(offset);
cycling_power_t * instance = &cycling_power;
if (attribute_handle == instance->measurement_client_configuration_descriptor_handle){
if (buffer && (buffer_size >= 2u)){
little_endian_store_16(buffer, 0, instance->measurement_client_configuration_descriptor_notify);
}
return 2;
}
if (attribute_handle == instance->measurement_server_configuration_descriptor_handle){
if (buffer && (buffer_size >= 2u)){
little_endian_store_16(buffer, 0, instance->measurement_server_configuration_descriptor_broadcast);
}
return 2;
}
if (attribute_handle == instance->vector_client_configuration_descriptor_handle){
if (buffer && (buffer_size >= 2u)){
little_endian_store_16(buffer, 0, instance->vector_client_configuration_descriptor_notify);
}
return 2;
}
if (attribute_handle == instance->control_point_client_configuration_descriptor_handle){
if (buffer && (buffer_size >= 2u)){
little_endian_store_16(buffer, 0, instance->control_point_client_configuration_descriptor_indicate);
}
return 2;
}
if (attribute_handle == instance->feature_value_handle){
if (buffer && (buffer_size >= 4u)){
little_endian_store_32(buffer, 0, instance->feature_flags);
}
return 4;
}
if (attribute_handle == instance->sensor_location_value_handle){
if (buffer && (buffer_size >= 1u)){
buffer[0] = instance->sensor_location;
}
return 1;
}
return 0;
}
static int has_feature(cycling_power_feature_flag_t feature){
cycling_power_t * instance = &cycling_power;
return (instance->feature_flags & (1u << feature)) != 0u;
}
static int cycling_power_vector_instantaneous_measurement_direction(void){
cycling_power_t * instance = &cycling_power;
return instance->vector_instantaneous_measurement_direction;
}
static uint16_t cycling_power_service_default_measurement_flags(void){
cycling_power_t * instance = &cycling_power;
uint16_t measurement_flags = 0;
uint8_t flag[] = {
(uint8_t) has_feature(CP_FEATURE_FLAG_PEDAL_POWER_BALANCE_SUPPORTED),
(uint8_t) has_feature(CP_FEATURE_FLAG_PEDAL_POWER_BALANCE_SUPPORTED) && instance->pedal_power_balance_reference,
(uint8_t) has_feature(CP_FEATURE_FLAG_ACCUMULATED_TORQUE_SUPPORTED),
(uint8_t) has_feature(CP_FEATURE_FLAG_ACCUMULATED_TORQUE_SUPPORTED) && instance->torque_source,
(uint8_t) has_feature(CP_FEATURE_FLAG_WHEEL_REVOLUTION_DATA_SUPPORTED),
(uint8_t) has_feature(CP_FEATURE_FLAG_CRANK_REVOLUTION_DATA_SUPPORTED),
(uint8_t) has_feature(CP_FEATURE_FLAG_EXTREME_MAGNITUDES_SUPPORTED) && (has_feature(CP_FEATURE_FLAG_SENSOR_MEASUREMENT_CONTEXT) == CP_SENSOR_MEASUREMENT_CONTEXT_FORCE),
(uint8_t) has_feature(CP_FEATURE_FLAG_EXTREME_MAGNITUDES_SUPPORTED) && (has_feature(CP_FEATURE_FLAG_SENSOR_MEASUREMENT_CONTEXT) == CP_SENSOR_MEASUREMENT_CONTEXT_TORQUE),
(uint8_t) has_feature(CP_FEATURE_FLAG_EXTREME_ANGLES_SUPPORTED),
(uint8_t) has_feature(CP_FEATURE_FLAG_TOP_AND_BOTTOM_DEAD_SPOT_ANGLE_SUPPORTED),
(uint8_t) has_feature(CP_FEATURE_FLAG_TOP_AND_BOTTOM_DEAD_SPOT_ANGLE_SUPPORTED),
(uint8_t) has_feature(CP_FEATURE_FLAG_ACCUMULATED_ENERGY_SUPPORTED),
(uint8_t) has_feature(CP_FEATURE_FLAG_OFFSET_COMPENSATION_INDICATOR_SUPPORTED)
};
int i;
for (i = CP_MEASUREMENT_FLAG_PEDAL_POWER_BALANCE_PRESENT; i <= CP_MEASUREMENT_FLAG_OFFSET_COMPENSATION_INDICATOR; i++){
measurement_flags |= flag[i] << i;
}
return measurement_flags;
}
static uint16_t cycling_power_service_get_measurement_flags(cycling_power_t * instance){
if (!instance) return 0;
if (instance->masked_measurement_flags != CYCLING_POWER_MEASUREMENT_FLAGS_CLEARED){
return instance->masked_measurement_flags;
}
if (instance->default_measurement_flags == CYCLING_POWER_MEASUREMENT_FLAGS_CLEARED){
instance->default_measurement_flags = cycling_power_service_default_measurement_flags();
}
return instance->default_measurement_flags;
}
uint16_t cycling_power_service_measurement_flags(void){
cycling_power_t * instance = &cycling_power;
return cycling_power_service_get_measurement_flags(instance);
}
uint8_t cycling_power_service_vector_flags(void){
uint8_t vector_flags = 0;
uint8_t flag[] = {
(uint8_t )has_feature(CP_FEATURE_FLAG_CRANK_REVOLUTION_DATA_SUPPORTED),
(uint8_t )has_feature(CP_FEATURE_FLAG_EXTREME_ANGLES_SUPPORTED),
(uint8_t )has_feature(CP_FEATURE_FLAG_EXTREME_MAGNITUDES_SUPPORTED) && (has_feature(CP_FEATURE_FLAG_SENSOR_MEASUREMENT_CONTEXT) == CP_SENSOR_MEASUREMENT_CONTEXT_FORCE),
(uint8_t )has_feature(CP_FEATURE_FLAG_EXTREME_MAGNITUDES_SUPPORTED) && (has_feature(CP_FEATURE_FLAG_SENSOR_MEASUREMENT_CONTEXT) == CP_SENSOR_MEASUREMENT_CONTEXT_TORQUE),
(uint8_t )has_feature(CP_FEATURE_FLAG_INSTANTANEOUS_MEASUREMENT_DIRECTION_SUPPORTED) && cycling_power_vector_instantaneous_measurement_direction()
};
int i;
for (i = CP_VECTOR_FLAG_CRANK_REVOLUTION_DATA_PRESENT; i <= CP_VECTOR_FLAG_INSTANTANEOUS_MEASUREMENT_DIRECTION; i++){
vector_flags |= flag[i] << i;
}
return vector_flags;
}
static void cycling_power_service_vector_can_send_now(void * context){
cycling_power_t * instance = (cycling_power_t *) context;
if (!instance){
log_error("cycling_power_service_measurement_can_send_now: instance is null");
return;
}
uint8_t value[50];
uint8_t vector_flags = cycling_power_service_vector_flags();
int pos = 0;
value[pos++] = vector_flags;
int i;
for (i = CP_VECTOR_FLAG_CRANK_REVOLUTION_DATA_PRESENT; i <= CP_VECTOR_FLAG_INSTANTANEOUS_MEASUREMENT_DIRECTION; i++){
if ((vector_flags & (1u << i)) == 0u) continue;
switch ((cycling_power_vector_flag_t) i){
case CP_VECTOR_FLAG_CRANK_REVOLUTION_DATA_PRESENT:
little_endian_store_16(value, pos, instance->cumulative_crank_revolutions);
pos += 2;
little_endian_store_16(value, pos, instance->last_crank_event_time_s);
pos += 2;
break;
case CP_VECTOR_FLAG_INSTANTANEOUS_FORCE_MAGNITUDE_ARRAY_PRESENT:{
uint16_t att_mtu = att_server_get_mtu(instance->con_handle);
uint16_t bytes_left = 0;
if (att_mtu > (pos + 3u)){
bytes_left = btstack_min(sizeof(value), att_mtu - 3u - pos);
}
while ((bytes_left > 2u) && instance->force_magnitude_count){
little_endian_store_16(value, pos, instance->vector_instantaneous_force_magnitude_N_array[0]);
pos += 2;
bytes_left -= 2u;
instance->vector_instantaneous_force_magnitude_N_array++;
instance->force_magnitude_count--;
}
break;
}
case CP_VECTOR_FLAG_INSTANTANEOUS_TORQUE_MAGNITUDE_ARRAY_PRESENT:{
uint16_t att_mtu = att_server_get_mtu(instance->con_handle);
uint16_t bytes_left = 0;
if (att_mtu > (pos + 3u)){
bytes_left = btstack_min(sizeof(value), att_mtu - 3u - pos);
}
while ((bytes_left > 2u) && instance->torque_magnitude_count){
little_endian_store_16(value, pos, instance->vector_instantaneous_torque_magnitude_Nm_array[0]);
pos += 2;
bytes_left -= 2u;
instance->vector_instantaneous_torque_magnitude_Nm_array++;
instance->torque_magnitude_count--;
}
break;
}
case CP_VECTOR_FLAG_FIRST_CRANK_MEASUREMENT_ANGLE_PRESENT:
little_endian_store_16(value, pos, instance->vector_first_crank_measurement_angle_degree);
pos += 2;
break;
case CP_VECTOR_FLAG_INSTANTANEOUS_MEASUREMENT_DIRECTION:
break;
default:
break;
}
}
att_server_notify(instance->con_handle, instance->vector_value_handle, &value[0], pos);
}
static int cycling_power_measurement_flag_value_size(cycling_power_measurement_flag_t flag){
switch (flag){
case CP_MEASUREMENT_FLAG_PEDAL_POWER_BALANCE_PRESENT:
return 1;
case CP_MEASUREMENT_FLAG_WHEEL_REVOLUTION_DATA_PRESENT:
return 6;
case CP_MEASUREMENT_FLAG_CRANK_REVOLUTION_DATA_PRESENT:
case CP_MEASUREMENT_FLAG_EXTREME_FORCE_MAGNITUDES_PRESENT:
case CP_MEASUREMENT_FLAG_EXTREME_TORQUE_MAGNITUDES_PRESENT:
return 4;
case CP_MEASUREMENT_FLAG_EXTREME_ANGLES_PRESENT:
return 3;
case CP_MEASUREMENT_FLAG_ACCUMULATED_TORQUE_PRESENT:
case CP_MEASUREMENT_FLAG_TOP_DEAD_SPOT_ANGLE_PRESENT:
case CP_MEASUREMENT_FLAG_BOTTOM_DEAD_SPOT_ANGLE_PRESENT:
case CP_MEASUREMENT_FLAG_ACCUMULATED_ENERGY_PRESENT:
return 2;
default:
return 0;
}
}
static int cycling_power_store_measurement_flag_value(cycling_power_t * instance, cycling_power_measurement_flag_t flag, uint8_t * value){
if (!instance) return 0;
int pos = 0;
switch (flag){
case CP_MEASUREMENT_FLAG_PEDAL_POWER_BALANCE_PRESENT:
value[pos++] = instance->pedal_power_balance_percentage;
break;
case CP_MEASUREMENT_FLAG_ACCUMULATED_TORQUE_PRESENT:
little_endian_store_16(value, pos, instance->accumulated_torque_Nm);
pos += 2;
break;
case CP_MEASUREMENT_FLAG_WHEEL_REVOLUTION_DATA_PRESENT:
little_endian_store_32(value, pos, instance->cumulative_wheel_revolutions);
pos += 4;
little_endian_store_16(value, pos, instance->last_wheel_event_time_s);
pos += 2;
break;
case CP_MEASUREMENT_FLAG_CRANK_REVOLUTION_DATA_PRESENT:
little_endian_store_16(value, pos, instance->cumulative_crank_revolutions);
pos += 2;
little_endian_store_16(value, pos, instance->last_crank_event_time_s);
pos += 2;
break;
case CP_MEASUREMENT_FLAG_EXTREME_FORCE_MAGNITUDES_PRESENT:
little_endian_store_16(value, pos, (uint16_t)instance->maximum_force_magnitude_N);
pos += 2;
little_endian_store_16(value, pos, (uint16_t)instance->minimum_force_magnitude_N);
pos += 2;
break;
case CP_MEASUREMENT_FLAG_EXTREME_TORQUE_MAGNITUDES_PRESENT:
little_endian_store_16(value, pos, (uint16_t)instance->maximum_torque_magnitude_Nm);
pos += 2;
little_endian_store_16(value, pos, (uint16_t)instance->minimum_torque_magnitude_Nm);
pos += 2;
break;
case CP_MEASUREMENT_FLAG_EXTREME_ANGLES_PRESENT:
little_endian_store_24(value, pos, (instance->maximum_angle_degree << 12) | instance->minimum_angle_degree);
pos += 3;
break;
case CP_MEASUREMENT_FLAG_TOP_DEAD_SPOT_ANGLE_PRESENT:
little_endian_store_16(value, pos, (uint16_t)instance->top_dead_spot_angle_degree);
pos += 2;
break;
case CP_MEASUREMENT_FLAG_BOTTOM_DEAD_SPOT_ANGLE_PRESENT:
little_endian_store_16(value, pos, (uint16_t)instance->bottom_dead_spot_angle_degree);
pos += 2;
break;
case CP_MEASUREMENT_FLAG_ACCUMULATED_ENERGY_PRESENT:
little_endian_store_16(value, pos, (uint16_t)instance->accumulated_energy_kJ);
pos += 2;
break;
default:
break;
}
return pos;
}
static int cycling_power_store_measurement(cycling_power_t * instance, uint8_t * value, uint16_t max_value_size){
if (max_value_size < 4u) return 0u;
if (!instance) return 0;
uint16_t measurement_flags = cycling_power_service_get_measurement_flags(instance);
int pos = 0;
little_endian_store_16(value, 0, measurement_flags);
pos += 2;
little_endian_store_16(value, 2, instance->instantaneous_power_W);
pos += 2;
int flag_index;
uint16_t bytes_left = max_value_size - pos;
for (flag_index = 0; flag_index < CP_MEASUREMENT_FLAG_RESERVED; flag_index++){
if ((measurement_flags & (1u << flag_index)) == 0u) continue;
cycling_power_measurement_flag_t flag = (cycling_power_measurement_flag_t) flag_index;
uint16_t value_size = cycling_power_measurement_flag_value_size(flag);
if (value_size > bytes_left ) return pos;
cycling_power_store_measurement_flag_value(instance, flag, &value[pos]);
pos += value_size;
bytes_left -= value_size;
}
return pos;
}
int cycling_power_get_measurement_adv(uint16_t adv_interval, uint8_t * adv_buffer, uint16_t adv_size){
if (adv_size < 12u) return 0u;
cycling_power_t * instance = &cycling_power;
int pos = 0;
// adv flags
adv_buffer[pos++] = 2;
adv_buffer[pos++] = BLUETOOTH_DATA_TYPE_FLAGS;
adv_buffer[pos++] = 0x4;
// adv interval
adv_buffer[pos++] = 3;
adv_buffer[pos++] = BLUETOOTH_DATA_TYPE_ADVERTISING_INTERVAL;
little_endian_store_16(adv_buffer, pos, adv_interval);
pos += 2;
//
int value_len = cycling_power_store_measurement(instance, &adv_buffer[pos + 4], CYCLING_POWER_MAX_BROACAST_MSG_SIZE - (pos + 4));
adv_buffer[pos++] = 3 + value_len;
adv_buffer[pos++] = BLUETOOTH_DATA_TYPE_SERVICE_DATA_16_BIT_UUID;
little_endian_store_16(adv_buffer, pos, ORG_BLUETOOTH_SERVICE_CYCLING_POWER);
pos += 2;
// value data already in place cycling_power_get_measurement
pos += value_len;
// set ADV_NONCONN_IND
return pos;
}
static void cycling_power_service_broadcast_can_send_now(void * context){
cycling_power_t * instance = (cycling_power_t *) context;
if (!instance){
log_error("cycling_power_service_broadcast_can_send_now: instance is null");
return;
}
uint8_t value[CYCLING_POWER_MAX_BROACAST_MSG_SIZE];
int pos = cycling_power_store_measurement(instance, &value[0], sizeof(value));
att_server_notify(instance->con_handle, instance->measurement_value_handle, &value[0], pos);
}
static void cycling_power_service_measurement_can_send_now(void * context){
cycling_power_t * instance = (cycling_power_t *) context;
if (!instance){
log_error("cycling_power_service_measurement_can_send_now: instance is null");
return;
}
uint8_t value[40];
int pos = cycling_power_store_measurement(instance, &value[0], sizeof(value));
att_server_notify(instance->con_handle, instance->measurement_value_handle, &value[0], pos);
}
static void cycling_power_service_response_can_send_now(void * context){
cycling_power_t * instance = (cycling_power_t *) context;
if (!instance){
log_error("cycling_power_service_response_can_send_now: instance is null");
return;
}
if (instance->response_value == CP_RESPONSE_VALUE_W4_VALUE_AVAILABLE){
log_error("cycling_power_service_response_can_send_now: CP_RESPONSE_VALUE_W4_VALUE_AVAILABLE");
return;
}
// use preprocessor instead of btstack_max to get compile-time constant
#if (CP_SENSOR_LOCATION_RESERVED > (CYCLING_POWER_MANUFACTURER_SPECIFIC_DATA_MAX_SIZE + 5))
#define MAX_RESPONSE_PAYLOAD CP_SENSOR_LOCATION_RESERVED
#else
#define MAX_RESPONSE_PAYLOAD (CYCLING_POWER_MANUFACTURER_SPECIFIC_DATA_MAX_SIZE + 5)
#endif
uint8_t value[3 + MAX_RESPONSE_PAYLOAD];
int pos = 0;
value[pos++] = CP_OPCODE_RESPONSE_CODE;
value[pos++] = instance->request_opcode;
value[pos++] = instance->response_value;
if (instance->response_value == CP_RESPONSE_VALUE_SUCCESS){
switch (instance->request_opcode){
case CP_OPCODE_REQUEST_SUPPORTED_SENSOR_LOCATIONS:{
int i;
for (i=0; i<instance->num_supported_sensor_locations; i++){
value[pos++] = instance->supported_sensor_locations[i];
}
break;
}
case CP_OPCODE_REQUEST_CRANK_LENGTH:
little_endian_store_16(value, pos, instance->crank_length_mm);
pos += 2;
break;
case CP_OPCODE_REQUEST_CHAIN_LENGTH:
little_endian_store_16(value, pos, instance->chain_length_mm);
pos += 2;
break;
case CP_OPCODE_REQUEST_CHAIN_WEIGHT:
little_endian_store_16(value, pos, instance->chain_weight_g);
pos += 2;
break;
case CP_OPCODE_REQUEST_SPAN_LENGTH:
little_endian_store_16(value, pos, instance->span_length_mm);
pos += 2;
break;
case CP_OPCODE_REQUEST_FACTORY_CALIBRATION_DATE:
little_endian_store_16(value, pos, instance->factory_calibration_date.year);
pos += 2;
value[pos++] = instance->factory_calibration_date.month;
value[pos++] = instance->factory_calibration_date.day;
value[pos++] = instance->factory_calibration_date.hours;
value[pos++] = instance->factory_calibration_date.minutes;
value[pos++] = instance->factory_calibration_date.seconds;
break;
case CP_OPCODE_REQUEST_SAMPLING_RATE:
value[pos++] = instance->sampling_rate_Hz;
break;
case CP_OPCODE_START_OFFSET_COMPENSATION:
case CP_OPCODE_START_ENHANCED_OFFSET_COMPENSATION:{
uint16_t calibrated_value = 0xffff;
if (has_feature(CP_FEATURE_FLAG_EXTREME_MAGNITUDES_SUPPORTED)){
if (has_feature(CP_FEATURE_FLAG_SENSOR_MEASUREMENT_CONTEXT) == CP_SENSOR_MEASUREMENT_CONTEXT_FORCE) {
calibrated_value = instance->current_force_magnitude_N;
} else if (has_feature(CP_FEATURE_FLAG_SENSOR_MEASUREMENT_CONTEXT) == CP_SENSOR_MEASUREMENT_CONTEXT_TORQUE){
calibrated_value = instance->current_torque_magnitude_Nm;
}
}
if (calibrated_value == CP_CALIBRATION_STATUS_INCORRECT_CALIBRATION_POSITION){
value[pos++] = (uint8_t) calibrated_value;
// do not include manufacturer ID and data
break;
} else if (calibrated_value == CP_CALIBRATION_STATUS_MANUFACTURER_SPECIFIC_ERROR_FOLLOWS){
value[pos++] = (uint8_t) calibrated_value;
} else {
little_endian_store_16(value, pos, calibrated_value);
pos += 2;
}
if (instance->request_opcode == CP_OPCODE_START_OFFSET_COMPENSATION) break;
little_endian_store_16(value, pos, instance->manufacturer_company_id);
pos += 2;
int data_len = (instance->num_manufacturer_specific_data < CYCLING_POWER_MANUFACTURER_SPECIFIC_DATA_MAX_SIZE) ? instance->num_manufacturer_specific_data : (CYCLING_POWER_MANUFACTURER_SPECIFIC_DATA_MAX_SIZE - 1);
value[pos++] = data_len;
(void)memcpy(&value[pos],
instance->manufacturer_specific_data, data_len);
pos += data_len;
value[pos++] = 0;
break;
}
case CP_OPCODE_MASK_CYCLING_POWER_MEASUREMENT_CHARACTERISTIC_CONTENT:
break;
default:
break;
}
}
uint8_t status = att_server_indicate(instance->con_handle, instance->control_point_value_handle, &value[0], pos);
if (status == ERROR_CODE_SUCCESS){
instance->w4_indication_complete = 1;
instance->request_opcode = CP_OPCODE_IDLE;
} else {
log_error("can_send_now failed 0x%2x", status);
}
}
static int cycling_power_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(con_handle);
UNUSED(offset);
UNUSED(buffer_size);
int i;
cycling_power_sensor_location_t location;
cycling_power_t * instance = &cycling_power;
if (transaction_mode != ATT_TRANSACTION_MODE_NONE){
return 0;
}
if (attribute_handle == instance->measurement_client_configuration_descriptor_handle){
if (buffer_size < 2u){
return ATT_ERROR_INVALID_OFFSET;
}
instance->measurement_client_configuration_descriptor_notify = little_endian_read_16(buffer, 0);
instance->con_handle = con_handle;
log_info("cycling_power_service_write_callback: measurement enabled %d", instance->measurement_client_configuration_descriptor_notify);
return 0;
}
if (attribute_handle == instance->measurement_server_configuration_descriptor_handle){
if (buffer_size < 2u){
return ATT_ERROR_INVALID_OFFSET;
}
instance->measurement_server_configuration_descriptor_broadcast = little_endian_read_16(buffer, 0);
instance->con_handle = con_handle;
uint8_t event[5];
int index = 0;
event[index++] = HCI_EVENT_GATTSERVICE_META;
event[index++] = sizeof(event) - 2u;
if (instance->measurement_server_configuration_descriptor_broadcast){
event[index++] = GATTSERVICE_SUBEVENT_CYCLING_POWER_BROADCAST_START;
log_info("cycling_power_service_write_callback: start broadcast");
} else {
event[index++] = GATTSERVICE_SUBEVENT_CYCLING_POWER_BROADCAST_STOP;
log_info("cycling_power_service_write_callback: stop broadcast");
}
little_endian_store_16(event, index, con_handle);
index += 2;
(*instance->calibration_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
return 0;
}
if (attribute_handle == instance->vector_client_configuration_descriptor_handle){
if (buffer_size < 2u){
return ATT_ERROR_INVALID_OFFSET;
}
instance->con_handle = con_handle;
#ifdef ENABLE_ATT_DELAYED_RESPONSE
switch (instance->con_interval_status){
case CP_CONNECTION_INTERVAL_STATUS_REJECTED:
return CYCLING_POWER_ERROR_CODE_INAPPROPRIATE_CONNECTION_PARAMETERS;
case CP_CONNECTION_INTERVAL_STATUS_ACCEPTED:
case CP_CONNECTION_INTERVAL_STATUS_RECEIVED:
if ((instance->con_interval > instance->con_interval_max) || (instance->con_interval < instance->con_interval_min)){
instance->con_interval_status = CP_CONNECTION_INTERVAL_STATUS_W4_L2CAP_RESPONSE;
gap_request_connection_parameter_update(instance->con_handle, instance->con_interval_min, instance->con_interval_max, 4, 100); // 15 ms, 4, 1s
return ATT_ERROR_WRITE_RESPONSE_PENDING;
}
instance->vector_client_configuration_descriptor_notify = little_endian_read_16(buffer, 0);
return 0;
default:
return ATT_ERROR_WRITE_RESPONSE_PENDING;
}
#endif
}
if (attribute_handle == instance->control_point_client_configuration_descriptor_handle){
if (buffer_size < 2u){
return ATT_ERROR_INVALID_OFFSET;
}
instance->control_point_client_configuration_descriptor_indicate = little_endian_read_16(buffer, 0);
instance->con_handle = con_handle;
log_info("cycling_power_service_write_callback: indication enabled %d", instance->control_point_client_configuration_descriptor_indicate);
return 0;
}
if (attribute_handle == instance->feature_value_handle){
if (buffer_size < 4u){
return ATT_ERROR_INVALID_OFFSET;
}
instance->feature_flags = little_endian_read_32(buffer, 0);
return 0;
}
if (attribute_handle == instance->control_point_value_handle){
if (instance->control_point_client_configuration_descriptor_indicate == 0u) return CYCLING_POWER_ERROR_CODE_CCC_DESCRIPTOR_IMPROPERLY_CONFIGURED;
if (instance->w4_indication_complete != 0u){
return CYCLING_POWER_ERROR_CODE_PROCEDURE_ALREADY_IN_PROGRESS;
}
int pos = 0;
instance->request_opcode = (cycling_power_opcode_t) buffer[pos++];
instance->response_value = CP_RESPONSE_VALUE_OP_CODE_NOT_SUPPORTED;
switch (instance->request_opcode){
case CP_OPCODE_SET_CUMULATIVE_VALUE:
if (!has_feature(CP_FEATURE_FLAG_WHEEL_REVOLUTION_DATA_SUPPORTED)) break;
instance->cumulative_wheel_revolutions = little_endian_read_32(buffer, pos);
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_REQUEST_SUPPORTED_SENSOR_LOCATIONS:
if (!has_feature(CP_FEATURE_FLAG_MULTIPLE_SENSOR_LOCATIONS_SUPPORTED)) break;
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_UPDATE_SENSOR_LOCATION:
if (!has_feature(CP_FEATURE_FLAG_MULTIPLE_SENSOR_LOCATIONS_SUPPORTED)) break;
location = (cycling_power_sensor_location_t) buffer[pos];
instance->response_value = CP_RESPONSE_VALUE_INVALID_PARAMETER;
for (i=0; i<instance->num_supported_sensor_locations; i++){
if (instance->supported_sensor_locations[i] == location){
instance->sensor_location = location;
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
}
}
break;
case CP_OPCODE_REQUEST_CRANK_LENGTH:
if (!has_feature(CP_FEATURE_FLAG_CRANK_LENGTH_ADJUSTMENT_SUPPORTED)) break;
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_SET_CRANK_LENGTH:
if (!has_feature(CP_FEATURE_FLAG_CRANK_LENGTH_ADJUSTMENT_SUPPORTED)) break;
instance->crank_length_mm = little_endian_read_16(buffer, pos);
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_REQUEST_CHAIN_LENGTH:
if (!has_feature(CP_FEATURE_FLAG_CHAIN_LENGTH_ADJUSTMENT_SUPPORTED)) break;
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_SET_CHAIN_LENGTH:
if (!has_feature(CP_FEATURE_FLAG_CHAIN_LENGTH_ADJUSTMENT_SUPPORTED)) break;
instance->chain_length_mm = little_endian_read_16(buffer, pos);
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_REQUEST_CHAIN_WEIGHT:
if (!has_feature(CP_FEATURE_FLAG_CHAIN_WEIGHT_ADJUSTMENT_SUPPORTED)) break;
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_SET_CHAIN_WEIGHT:
if (!has_feature(CP_FEATURE_FLAG_CHAIN_WEIGHT_ADJUSTMENT_SUPPORTED)) break;
instance->chain_weight_g = little_endian_read_16(buffer, pos);
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_REQUEST_SPAN_LENGTH:
if (!has_feature(CP_FEATURE_FLAG_SPAN_LENGTH_ADJUSTMENT_SUPPORTED)) break;
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_SET_SPAN_LENGTH:
if (!has_feature(CP_FEATURE_FLAG_SPAN_LENGTH_ADJUSTMENT_SUPPORTED)) break;
instance->span_length_mm = little_endian_read_16(buffer, pos);
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_REQUEST_FACTORY_CALIBRATION_DATE:
if (!has_feature(CP_FEATURE_FLAG_FACTORY_CALIBRATION_DATE_SUPPORTED)) break;
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_REQUEST_SAMPLING_RATE:
if (!instance->vector_value_handle) break;
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
case CP_OPCODE_START_OFFSET_COMPENSATION:
case CP_OPCODE_START_ENHANCED_OFFSET_COMPENSATION:
if (!has_feature(CP_FEATURE_FLAG_OFFSET_COMPENSATION_SUPPORTED)){
instance->response_value = CP_RESPONSE_VALUE_INVALID_PARAMETER;
break;
}
if (has_feature(CP_FEATURE_FLAG_EXTREME_MAGNITUDES_SUPPORTED) &&
((has_feature(CP_FEATURE_FLAG_SENSOR_MEASUREMENT_CONTEXT) == CP_SENSOR_MEASUREMENT_CONTEXT_FORCE) ||
(has_feature(CP_FEATURE_FLAG_SENSOR_MEASUREMENT_CONTEXT) == CP_SENSOR_MEASUREMENT_CONTEXT_TORQUE))
){
uint8_t event[7];
int index = 0;
event[index++] = HCI_EVENT_GATTSERVICE_META;
event[index++] = sizeof(event) - 2u;
event[index++] = GATTSERVICE_SUBEVENT_CYCLING_POWER_START_CALIBRATION;
little_endian_store_16(event, index, con_handle);
index += 2;
event[index++] = has_feature(CP_FEATURE_FLAG_SENSOR_MEASUREMENT_CONTEXT) == CP_SENSOR_MEASUREMENT_CONTEXT_TORQUE;
event[index++] = (instance->request_opcode == CP_OPCODE_START_ENHANCED_OFFSET_COMPENSATION);
instance->response_value = CP_RESPONSE_VALUE_W4_VALUE_AVAILABLE;
(*instance->calibration_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
return 0;
}
instance->current_force_magnitude_N = 0xffff;
instance->current_torque_magnitude_Nm = 0xffff;
break;
case CP_OPCODE_MASK_CYCLING_POWER_MEASUREMENT_CHARACTERISTIC_CONTENT:{
if (!has_feature(CP_FEATURE_FLAG_CYCLING_POWER_MEASUREMENT_CHARACTERISTIC_CONTENT_MASKING_SUPPORTED)) break;
uint16_t mask_bitmap = little_endian_read_16(buffer, pos);
uint16_t masked_measurement_flags = instance->default_measurement_flags;
uint16_t index = 0;
for (i = 0; i < CP_MASK_BIT_RESERVED; i++){
uint8_t clear_bit = (mask_bitmap & (1u << i)) ? 1u : 0u;
masked_measurement_flags &= ~(clear_bit << index);
index++;
// following measurement flags have additional flag
switch ((cycling_power_mask_bit_t)i){
case CP_MASK_BIT_PEDAL_POWER_BALANCE:
case CP_MASK_BIT_ACCUMULATED_TORQUE:
case CP_MASK_BIT_EXTREME_MAGNITUDES:
masked_measurement_flags &= ~(clear_bit << index);
index++;
break;
default:
break;
}
}
instance->masked_measurement_flags = masked_measurement_flags;
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
break;
}
default:
break;
}
if (instance->control_point_client_configuration_descriptor_indicate){
instance->control_point_indicate_callback.callback = &cycling_power_service_response_can_send_now;
instance->control_point_indicate_callback.context = (void*) instance;
att_server_register_can_send_now_callback(&instance->control_point_indicate_callback, instance->con_handle);
}
return 0;
}
return 0;
}
static void packet_handler(uint8_t packet_type, uint16_t channel, uint8_t *packet, uint16_t size){
UNUSED(channel);
UNUSED(size);
cycling_power_t * instance = &cycling_power;
uint8_t event_type = hci_event_packet_get_type(packet);
uint16_t con_handle;
if (packet_type != HCI_EVENT_PACKET) return;
switch (event_type){
case HCI_EVENT_META_GAP:
switch (hci_event_gap_meta_get_subevent_code(packet)) {
case GAP_SUBEVENT_LE_CONNECTION_COMPLETE:
instance->con_handle = gap_subevent_le_connection_complete_get_connection_handle(packet);
// print connection parameters (without using float operations)
instance->con_interval = gap_subevent_le_connection_complete_get_conn_interval(packet);
instance->con_interval_status = CP_CONNECTION_INTERVAL_STATUS_RECEIVED;
break;
default:
break;
}
break;
case HCI_EVENT_LE_META:
switch (hci_event_le_meta_get_subevent_code(packet)){
#ifdef ENABLE_ATT_DELAYED_RESPONSE
case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE:
if (instance->con_interval_status != CP_CONNECTION_INTERVAL_STATUS_W4_UPDATE) return;
if ((instance->con_interval > instance->con_interval_max) || (instance->con_interval < instance->con_interval_min)){
instance->con_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet);
instance->con_interval_status = CP_CONNECTION_INTERVAL_STATUS_ACCEPTED;
} else {
instance->con_interval_status = CP_CONNECTION_INTERVAL_STATUS_REJECTED;
}
att_server_response_ready(l2cap_event_connection_parameter_update_response_get_handle(packet));
break;
#endif
default:
break;
}
break;
#ifdef ENABLE_ATT_DELAYED_RESPONSE
case L2CAP_EVENT_CONNECTION_PARAMETER_UPDATE_RESPONSE:
if (instance->con_interval_status != CP_CONNECTION_INTERVAL_STATUS_W4_L2CAP_RESPONSE) return;
if (l2cap_event_connection_parameter_update_response_get_result(packet) == ERROR_CODE_SUCCESS){
instance->con_interval_status = CP_CONNECTION_INTERVAL_STATUS_W4_UPDATE;
} else {
instance->con_interval_status = CP_CONNECTION_INTERVAL_STATUS_REJECTED;
att_server_response_ready(l2cap_event_connection_parameter_update_response_get_handle(packet));
}
break;
#endif
case HCI_EVENT_DISCONNECTION_COMPLETE:{
if (!instance) return;
con_handle = hci_event_disconnection_complete_get_connection_handle(packet);
if (con_handle == HCI_CON_HANDLE_INVALID) return;
instance->masked_measurement_flags = CYCLING_POWER_MEASUREMENT_FLAGS_CLEARED;
instance->w4_indication_complete = 0;
uint8_t event[5];
int index = 0;
event[index++] = HCI_EVENT_GATTSERVICE_META;
event[index++] = sizeof(event) - 2u;
event[index++] = GATTSERVICE_SUBEVENT_CYCLING_POWER_BROADCAST_STOP;
little_endian_store_16(event, index, con_handle);
index += 2;
(*instance->calibration_callback)(HCI_EVENT_PACKET, 0, event, sizeof(event));
break;
}
case ATT_EVENT_HANDLE_VALUE_INDICATION_COMPLETE:
instance->w4_indication_complete = 0;
break;
default:
break;
}
}
void cycling_power_service_server_init(uint32_t feature_flags,
cycling_power_pedal_power_balance_reference_t pedal_power_balance_reference, cycling_power_torque_source_t torque_source,
cycling_power_sensor_location_t * supported_sensor_locations, uint16_t num_supported_sensor_locations,
cycling_power_sensor_location_t current_sensor_location){
cycling_power_t * instance = &cycling_power;
// TODO: remove hardcoded initialization
instance->con_interval_min = 6;
instance->con_interval_max = 6;
instance->con_interval_status = CP_CONNECTION_INTERVAL_STATUS_NONE;
instance->w4_indication_complete = 0;
hci_event_callback_registration.callback = &packet_handler;
hci_add_event_handler(&hci_event_callback_registration);
l2cap_event_callback_registration.callback = &packet_handler;
l2cap_add_event_handler(&l2cap_event_callback_registration);
instance->sensor_location = current_sensor_location;
instance->num_supported_sensor_locations = 0;
if (supported_sensor_locations != NULL){
instance->num_supported_sensor_locations = num_supported_sensor_locations;
instance->supported_sensor_locations = supported_sensor_locations;
}
instance->feature_flags = feature_flags;
instance->default_measurement_flags = CYCLING_POWER_MEASUREMENT_FLAGS_CLEARED;
instance->masked_measurement_flags = CYCLING_POWER_MEASUREMENT_FLAGS_CLEARED;
instance->pedal_power_balance_reference = pedal_power_balance_reference;
instance->torque_source = torque_source;
// get service handle range
uint16_t start_handle = 0;
uint16_t end_handle = 0xffff;
int service_found = gatt_server_get_handle_range_for_service_with_uuid16(ORG_BLUETOOTH_SERVICE_CYCLING_POWER, &start_handle, &end_handle);
btstack_assert(service_found != 0);
UNUSED(service_found);
// get CP Mesurement characteristic value handle and client configuration handle
instance->measurement_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_CYCLING_POWER_MEASUREMENT);
instance->measurement_client_configuration_descriptor_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_CYCLING_POWER_MEASUREMENT);
instance->measurement_server_configuration_descriptor_handle = gatt_server_get_server_configuration_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_CYCLING_POWER_MEASUREMENT);
// get CP Feature characteristic value handle and client configuration handle
instance->feature_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_CYCLING_POWER_FEATURE);
// get CP Sensor Location characteristic value handle and client configuration handle
instance->sensor_location_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_SENSOR_LOCATION);
// get CP Vector characteristic value handle and client configuration handle
instance->vector_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_CYCLING_POWER_VECTOR);
instance->vector_client_configuration_descriptor_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_CYCLING_POWER_VECTOR);
// get Body Sensor Location characteristic value handle and client configuration handle
instance->sensor_location_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_SENSOR_LOCATION);
// get SP Control Point characteristic value handle and client configuration handle
instance->control_point_value_handle = gatt_server_get_value_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_CYCLING_POWER_CONTROL_POINT);
instance->control_point_client_configuration_descriptor_handle = gatt_server_get_client_configuration_handle_for_characteristic_with_uuid16(start_handle, end_handle, ORG_BLUETOOTH_CHARACTERISTIC_CYCLING_POWER_CONTROL_POINT);
log_info("Measurement value handle 0x%02x", instance->measurement_value_handle);
log_info("M. Client Cfg value handle 0x%02x", instance->measurement_client_configuration_descriptor_handle);
log_info("M. Server Cfg value handle 0x%02x", instance->measurement_server_configuration_descriptor_handle);
log_info("Feature value handle 0x%02x", instance->feature_value_handle);
log_info("Sensor location value handle 0x%02x", instance->sensor_location_value_handle);
log_info("Vector value handle 0x%02x", instance->vector_value_handle);
log_info("Vector Cfg. value handle 0x%02x", instance->vector_client_configuration_descriptor_handle);
log_info("Control Point value handle 0x%02x", instance->control_point_value_handle);
log_info("Control P. Cfg. value handle 0x%02x", instance->control_point_client_configuration_descriptor_handle);
cycling_power_service.start_handle = start_handle;
cycling_power_service.end_handle = end_handle;
cycling_power_service.read_callback = &cycling_power_service_read_callback;
cycling_power_service.write_callback = &cycling_power_service_write_callback;
cycling_power_service.packet_handler = &packet_handler;
att_server_register_service_handler(&cycling_power_service);
}
void cycling_power_service_server_add_torque(int16_t torque_Nm){
cycling_power_t * instance = &cycling_power;
instance->accumulated_torque_Nm += torque_Nm;
}
void cycling_power_service_server_add_wheel_revolution(int32_t wheel_revolution, uint16_t wheel_event_time_s){
cycling_power_t * instance = &cycling_power;
instance->last_wheel_event_time_s = wheel_event_time_s;
if (wheel_revolution < 0){
uint32_t wheel_revolution_to_subtract = (uint32_t) (-wheel_revolution);
if (instance->cumulative_wheel_revolutions > wheel_revolution_to_subtract){
instance->cumulative_wheel_revolutions -= wheel_revolution_to_subtract;
} else {
instance->cumulative_wheel_revolutions = 0;
}
} else {
if (instance->cumulative_wheel_revolutions < (0xffffffff - wheel_revolution)){
instance->cumulative_wheel_revolutions += wheel_revolution;
} else {
instance->cumulative_wheel_revolutions = 0xffffffff;
}
}
}
void cycling_power_service_server_add_crank_revolution(uint16_t crank_revolution, uint16_t crank_event_time_s){
cycling_power_t * instance = &cycling_power;
instance->last_crank_event_time_s = crank_event_time_s;
instance->cumulative_crank_revolutions += crank_revolution;
}
void cycling_power_service_add_energy(uint16_t energy_kJ){
cycling_power_t * instance = &cycling_power;
if (instance->accumulated_energy_kJ <= (0xffffu - energy_kJ)){
instance->accumulated_energy_kJ += energy_kJ;
} else {
instance->accumulated_energy_kJ = 0xffff;
}
}
void cycling_power_service_server_set_instantaneous_power(int16_t instantaneous_power_W){
cycling_power_t * instance = &cycling_power;
instance->instantaneous_power_W = instantaneous_power_W;
}
void cycling_power_service_server_set_pedal_power_balance(uint8_t pedal_power_balance_percentage){
cycling_power_t * instance = &cycling_power;
instance->pedal_power_balance_percentage = pedal_power_balance_percentage;
}
void cycling_power_service_server_set_force_magnitude_values(int force_magnitude_count, int16_t * force_magnitude_N_array){
cycling_power_t * instance = &cycling_power;
instance->force_magnitude_count = force_magnitude_count;
instance->vector_instantaneous_force_magnitude_N_array = force_magnitude_N_array;
}
void cycling_power_service_server_set_torque_magnitude_values(int torque_magnitude_count, int16_t * torque_magnitude_Nm_array){
cycling_power_t * instance = &cycling_power;
instance->torque_magnitude_count = torque_magnitude_count;
instance->vector_instantaneous_torque_magnitude_Nm_array = torque_magnitude_Nm_array;
}
void cycling_power_service_server_set_first_crank_measurement_angle(uint16_t first_crank_measurement_angle_degree){
cycling_power_t * instance = &cycling_power;
instance->vector_first_crank_measurement_angle_degree = first_crank_measurement_angle_degree;
}
void cycling_power_service_server_set_instantaneous_measurement_direction(cycling_power_instantaneous_measurement_direction_t direction){
cycling_power_t * instance = &cycling_power;
instance->vector_instantaneous_measurement_direction = direction;
}
void cycling_power_service_server_set_force_magnitude(int16_t min_force_magnitude_N, int16_t max_force_magnitude_N){
cycling_power_t * instance = &cycling_power;
instance->minimum_force_magnitude_N = min_force_magnitude_N;
instance->maximum_force_magnitude_N = max_force_magnitude_N;
}
void cycling_power_service_server_set_torque_magnitude(int16_t min_torque_magnitude_Nm, int16_t max_torque_magnitude_Nm){
cycling_power_t * instance = &cycling_power;
instance->minimum_torque_magnitude_Nm = min_torque_magnitude_Nm;
instance->maximum_torque_magnitude_Nm = max_torque_magnitude_Nm;
}
void cycling_power_service_server_set_angle(uint16_t min_angle_degree, uint16_t max_angle_degree){
cycling_power_t * instance = &cycling_power;
instance->minimum_angle_degree = min_angle_degree;
instance->maximum_angle_degree = max_angle_degree;
}
void cycling_power_service_server_set_top_dead_spot_angle(uint16_t top_dead_spot_angle_degree){
cycling_power_t * instance = &cycling_power;
instance->top_dead_spot_angle_degree = top_dead_spot_angle_degree;
}
void cycling_power_service_server_set_bottom_dead_spot_angle(uint16_t bottom_dead_spot_angle_degree){
cycling_power_t * instance = &cycling_power;
instance->bottom_dead_spot_angle_degree = bottom_dead_spot_angle_degree;
}
static int gatt_date_is_valid(gatt_date_time_t date){
if ((date.year != 0u) && ((date.year < 1582u) || (date.year > 9999u))) return 0u;
if ((date.month != 0u) && (date.month > 12u)) return 0u;
if ((date.day != 0u) && (date.day > 31u)) return 0u;
if (date.hours > 23u) return 0u;
if (date.minutes > 59u) return 0u;
if (date.seconds > 59u) return 0u;
return 1;
}
int cycling_power_service_server_set_factory_calibration_date(gatt_date_time_t date){
if (!gatt_date_is_valid(date)) return 0;
cycling_power_t * instance = &cycling_power;
instance->factory_calibration_date = date;
return 1;
}
void cycling_power_service_server_set_sampling_rate(uint8_t sampling_rate_Hz){
cycling_power_t * instance = &cycling_power;
instance->sampling_rate_Hz = sampling_rate_Hz;
}
void cycling_power_service_server_update_values(void){
cycling_power_t * instance = &cycling_power;
if (instance->measurement_server_configuration_descriptor_broadcast){
instance->measurement_broadcast_callback.callback = &cycling_power_service_broadcast_can_send_now;
instance->measurement_broadcast_callback.context = (void*) instance;
att_server_register_can_send_now_callback(&instance->measurement_broadcast_callback, instance->con_handle);
}
if (instance->measurement_client_configuration_descriptor_notify){
instance->measurement_notify_callback.callback = &cycling_power_service_measurement_can_send_now;
instance->measurement_notify_callback.context = (void*) instance;
att_server_register_can_send_now_callback(&instance->measurement_notify_callback, instance->con_handle);
}
if (instance->vector_client_configuration_descriptor_notify){
instance->vector_notify_callback.callback = &cycling_power_service_vector_can_send_now;
instance->vector_notify_callback.context = (void*) instance;
att_server_register_can_send_now_callback(&instance->vector_notify_callback, instance->con_handle);
}
}
void cycling_power_service_server_packet_handler(btstack_packet_handler_t callback){
if (callback == NULL){
log_error("cycling_power_service_server_packet_handler called with NULL callback");
return;
}
cycling_power_t * instance = &cycling_power;
instance->calibration_callback = callback;
}
void cycling_power_server_calibration_done(cycling_power_sensor_measurement_context_t measurement_type, uint16_t calibrated_value){
cycling_power_t * instance = &cycling_power;
if (instance->response_value != CP_RESPONSE_VALUE_W4_VALUE_AVAILABLE){
return;
}
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
switch (measurement_type){
case CP_SENSOR_MEASUREMENT_CONTEXT_FORCE:
instance->current_force_magnitude_N = calibrated_value;
break;
case CP_SENSOR_MEASUREMENT_CONTEXT_TORQUE:
instance->current_torque_magnitude_Nm = calibrated_value;
break;
default:
instance->response_value = CP_RESPONSE_VALUE_INVALID_PARAMETER;
break;
}
if (instance->response_value == CP_RESPONSE_VALUE_SUCCESS){
switch (calibrated_value){
case CP_CALIBRATION_STATUS_INCORRECT_CALIBRATION_POSITION:
case CP_CALIBRATION_STATUS_MANUFACTURER_SPECIFIC_ERROR_FOLLOWS:
instance->response_value = CP_RESPONSE_VALUE_OPERATION_FAILED;
instance->response_value = CP_RESPONSE_VALUE_OPERATION_FAILED;
break;
default:
break;
}
}
if (instance->control_point_client_configuration_descriptor_indicate){
instance->control_point_indicate_callback.callback = &cycling_power_service_response_can_send_now;
instance->control_point_indicate_callback.context = (void*) instance;
att_server_register_can_send_now_callback(&instance->control_point_indicate_callback, instance->con_handle);
}
}
void cycling_power_server_enhanced_calibration_done(cycling_power_sensor_measurement_context_t measurement_type,
uint16_t calibrated_value, uint16_t manufacturer_company_id,
uint8_t num_manufacturer_specific_data, uint8_t * manufacturer_specific_data){
cycling_power_t * instance = &cycling_power;
if (instance->response_value != CP_RESPONSE_VALUE_W4_VALUE_AVAILABLE) return;
instance->response_value = CP_RESPONSE_VALUE_SUCCESS;
switch (measurement_type){
case CP_SENSOR_MEASUREMENT_CONTEXT_FORCE:
instance->current_force_magnitude_N = calibrated_value;
break;
case CP_SENSOR_MEASUREMENT_CONTEXT_TORQUE:
instance->current_torque_magnitude_Nm = calibrated_value;
break;
default:
instance->response_value = CP_RESPONSE_VALUE_INVALID_PARAMETER;
break;
}
if (instance->response_value == CP_RESPONSE_VALUE_SUCCESS){
switch (calibrated_value){
case CP_CALIBRATION_STATUS_INCORRECT_CALIBRATION_POSITION:
case CP_CALIBRATION_STATUS_MANUFACTURER_SPECIFIC_ERROR_FOLLOWS:
instance->response_value = CP_RESPONSE_VALUE_OPERATION_FAILED;
instance->response_value = CP_RESPONSE_VALUE_OPERATION_FAILED;
break;
default:
break;
}
instance->manufacturer_company_id = manufacturer_company_id;
instance->num_manufacturer_specific_data = num_manufacturer_specific_data;
instance->manufacturer_specific_data = manufacturer_specific_data;
}
if (instance->control_point_client_configuration_descriptor_indicate){
instance->control_point_indicate_callback.callback = &cycling_power_service_response_can_send_now;
instance->control_point_indicate_callback.context = (void*) instance;
att_server_register_can_send_now_callback(&instance->control_point_indicate_callback, instance->con_handle);
}
}
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