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ble_bas_peripheral.rs
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ble_bas_peripheral.rs
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#![no_std]
#![no_main]
#[path = "../example_common.rs"]
mod example_common;
use core::mem;
use defmt::{info, *};
use embassy_executor::Spawner;
use nrf_softdevice::ble::advertisement_builder::{
Flag, LegacyAdvertisementBuilder, LegacyAdvertisementPayload, ServiceList, ServiceUuid16,
};
use nrf_softdevice::ble::{gatt_server, peripheral};
use nrf_softdevice::{raw, Softdevice};
#[embassy_executor::task]
async fn softdevice_task(sd: &'static Softdevice) -> ! {
sd.run().await
}
#[nrf_softdevice::gatt_service(uuid = "180f")]
struct BatteryService {
#[characteristic(uuid = "2a19", read, notify)]
battery_level: u8,
}
#[nrf_softdevice::gatt_service(uuid = "9e7312e0-2354-11eb-9f10-fbc30a62cf38")]
struct FooService {
#[characteristic(uuid = "9e7312e0-2354-11eb-9f10-fbc30a63cf38", read, write, notify, indicate)]
foo: u16,
}
#[nrf_softdevice::gatt_server]
struct Server {
bas: BatteryService,
foo: FooService,
}
#[embassy_executor::main]
async fn main(spawner: Spawner) {
info!("Hello World!");
let config = nrf_softdevice::Config {
clock: Some(raw::nrf_clock_lf_cfg_t {
source: raw::NRF_CLOCK_LF_SRC_RC as u8,
rc_ctiv: 16,
rc_temp_ctiv: 2,
accuracy: raw::NRF_CLOCK_LF_ACCURACY_500_PPM as u8,
}),
conn_gap: Some(raw::ble_gap_conn_cfg_t {
conn_count: 6,
event_length: 24,
}),
conn_gatt: Some(raw::ble_gatt_conn_cfg_t { att_mtu: 256 }),
gatts_attr_tab_size: Some(raw::ble_gatts_cfg_attr_tab_size_t {
attr_tab_size: raw::BLE_GATTS_ATTR_TAB_SIZE_DEFAULT,
}),
gap_role_count: Some(raw::ble_gap_cfg_role_count_t {
adv_set_count: 1,
periph_role_count: 3,
central_role_count: 3,
central_sec_count: 0,
_bitfield_1: raw::ble_gap_cfg_role_count_t::new_bitfield_1(0),
}),
gap_device_name: Some(raw::ble_gap_cfg_device_name_t {
p_value: b"HelloRust" as *const u8 as _,
current_len: 9,
max_len: 9,
write_perm: unsafe { mem::zeroed() },
_bitfield_1: raw::ble_gap_cfg_device_name_t::new_bitfield_1(raw::BLE_GATTS_VLOC_STACK as u8),
}),
..Default::default()
};
let sd = Softdevice::enable(&config);
let server = unwrap!(Server::new(sd));
unwrap!(spawner.spawn(softdevice_task(sd)));
static ADV_DATA: LegacyAdvertisementPayload = LegacyAdvertisementBuilder::new()
.flags(&[Flag::GeneralDiscovery, Flag::LE_Only])
.services_16(ServiceList::Complete, &[ServiceUuid16::BATTERY])
.full_name("HelloRust")
.build();
static SCAN_DATA: LegacyAdvertisementPayload = LegacyAdvertisementBuilder::new()
.services_128(
ServiceList::Complete,
&[0x9e7312e0_2354_11eb_9f10_fbc30a62cf38_u128.to_le_bytes()],
)
.build();
loop {
let config = peripheral::Config::default();
let adv = peripheral::ConnectableAdvertisement::ScannableUndirected {
adv_data: &ADV_DATA,
scan_data: &SCAN_DATA,
};
let conn = unwrap!(peripheral::advertise_connectable(sd, adv, &config).await);
info!("advertising done!");
// Run the GATT server on the connection. This returns when the connection gets disconnected.
//
// Event enums (ServerEvent's) are generated by nrf_softdevice::gatt_server
// proc macro when applied to the Server struct above
let e = gatt_server::run(&conn, &server, |e| match e {
ServerEvent::Bas(e) => match e {
BatteryServiceEvent::BatteryLevelCccdWrite { notifications } => {
info!("battery notifications: {}", notifications)
}
},
ServerEvent::Foo(e) => match e {
FooServiceEvent::FooWrite(val) => {
info!("wrote foo: {}", val);
if let Err(e) = server.foo.foo_notify(&conn, &(val + 1)) {
info!("send notification error: {:?}", e);
}
}
FooServiceEvent::FooCccdWrite {
indications,
notifications,
} => {
info!("foo indications: {}, notifications: {}", indications, notifications)
}
},
})
.await;
info!("gatt_server run exited with error: {:?}", e);
}
}