main_ble_att_server.cpp File Reference

BLE GATT server example with AttributeServer and SecurityManager. More...

#include <assert.h>
#include <cstdint>
#include <cstdio>
#include "advertisement_data.hpp"
#include "gap_event_handler.hpp"
#include "ble_onchip_temperature.hpp"
#include "ble.hpp"
#include "characteristic.hpp"
#include "freertos_task.hpp"
#include "freertos_timer.hpp"
#include "gap.hpp"
#include "onboard_led.hpp"
#include "onchip_temperature_sensor.hpp"
#include "pico/cyw43_arch.h"
#include "pico/stdlib.h"
#include "pico/time.h"
#include "platform.hpp"
#include "security_event_handler.hpp"
#include "security_manager.hpp"
#include "app_profile.h"

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Functions
static void	timer_callback ()
	Periodic timer callback to update temperature value.
static void	on_turn_on ()
	Callback executed when the BLE stack is fully initialized.
void	ble_app_task (void *params)
	FreeRTOS task that owns BLE initialization and GATT server setup.
int	main ()
	Program entry point.

Variables
static c7222::OnBoardLED *	onboard_led = nullptr
	On-board LED used as a heartbeat while advertising.
static c7222::OnChipTemperatureSensor *	temp_sensor = nullptr
	Temperature sensor wrapper used to read on-chip temperature.
static c7222::FreeRtosTimer	app_timer
	Periodic timer used to update the temperature characteristic.
static c7222::Characteristic *	temperature_characteristic = nullptr
	Temperature characteristic handle resolved from the ATT database.
static c7222::Characteristic *	configuration_characteristic = nullptr
	Configuration characteristic handle resolved from the ATT database.
static c7222::Platform *	platform = nullptr
	Platform abstraction (initializes CYW43/BTstack).
static c7222::SecurityManager *	security_manager = nullptr
	SecurityManager instance for pairing/authorization.
static c7222::AttributeServer *	att_server = nullptr
	AttributeServer instance providing GATT database access.
static BleOnchipTemperature *	ble_temperature_manager = nullptr
	Helper that binds characteristic event handlers for logging.
static SecurityEventHandler	security_event_handler
	Security event handler (minimal example policy).
static GapEventHandler	gap_event_handler
	GAP event handler (logging + restart advertising).

Detailed Description

BLE GATT server example with AttributeServer and SecurityManager.

Demonstrates how to:

• Enable the AttributeServer with a GATT profile database.
• Register GAP and Security Manager event handlers.
• Locate services/characteristics and attach event handlers.
• Periodically update a characteristic value (temperature) using a timer.

Dependencies:

• GapEventHandler logs GAP events and restarts advertising on disconnect.
• SecurityEventHandler logs pairing/authorization and performs minimal policy.
• BleOnchipTemperature binds CharacteristicEventHandler instances to temperature/configuration characteristics for event logging.
• c7222::FreeRtosTask and c7222::FreeRtosTimer wrappers are used for task lifecycle and periodic callback scheduling.

Function Documentation

ble_app_task()

void ble_app_task

(

void *

params

)

FreeRTOS task that owns BLE initialization and GATT server setup.

Initializes platform, security manager, attribute server, resolves characteristics, and starts advertising. A timer periodically updates the temperature characteristic when connected.

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main()

int main

(

void

)

Program entry point.

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on_turn_on()

static void on_turn_on ( )

static

Callback executed when the BLE stack is fully initialized.

Configures advertising data/parameters and starts advertising.

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timer_callback()

static void timer_callback ( )

static

Periodic timer callback to update temperature value.

Reads the temperature sensor and writes a fixed-point value (C * 100) into the temperature characteristic when a connection is active.

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Variable Documentation

app_timer

c7222::FreeRtosTimer app_timer

static

Periodic timer used to update the temperature characteristic.

att_server

c7222::AttributeServer* att_server = nullptr

static

AttributeServer instance providing GATT database access.

ble_temperature_manager

BleOnchipTemperature* ble_temperature_manager = nullptr

static

Helper that binds characteristic event handlers for logging.

configuration_characteristic

c7222::Characteristic* configuration_characteristic = nullptr

static

Configuration characteristic handle resolved from the ATT database.

gap_event_handler

GapEventHandler gap_event_handler

static

GAP event handler (logging + restart advertising).

onboard_led

c7222::OnBoardLED* onboard_led = nullptr

static

On-board LED used as a heartbeat while advertising.

platform

c7222::Platform* platform = nullptr

static

Platform abstraction (initializes CYW43/BTstack).

security_event_handler

SecurityEventHandler security_event_handler

static

Security event handler (minimal example policy).

security_manager

c7222::SecurityManager* security_manager = nullptr

static

SecurityManager instance for pairing/authorization.

temp_sensor

c7222::OnChipTemperatureSensor* temp_sensor = nullptr

static

Temperature sensor wrapper used to read on-chip temperature.

temperature_characteristic

c7222::Characteristic* temperature_characteristic = nullptr

static

Temperature characteristic handle resolved from the ATT database.