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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
#[path = "../example_common.rs"]
mod example_common;
use core::mem;
use cortex_m_rt::entry;
use defmt::{info, *};
use embassy::executor::Executor;
use embassy::util::Forever;
use nrf_softdevice::ble::{central, gatt_client, Address, AddressType};
use nrf_softdevice::{raw, Softdevice};
static EXECUTOR: Forever<Executor> = Forever::new();
#[embassy::task]
async fn softdevice_task(sd: &'static Softdevice) {
sd.run().await;
}
#[nrf_softdevice::gatt_client(uuid = "180f")]
struct BatteryServiceClient {
#[characteristic(uuid = "2a19", read, write, notify)]
battery_level: u8,
}
#[embassy::task]
async fn ble_central_task(sd: &'static Softdevice) {
let addrs = &[&Address::new(
AddressType::RandomStatic,
[0x06, 0x6b, 0x71, 0x2c, 0xf5, 0xc0],
)];
let mut config = central::ConnectConfig::default();
config.scan_config.whitelist = Some(addrs);
let conn = unwrap!(central::connect(sd, &config).await);
info!("connected");
let client: BatteryServiceClient = unwrap!(gatt_client::discover(&conn).await);
// Read
let val = unwrap!(client.battery_level_read().await);
info!("read battery level: {}", val);
// Write, set it to 42
unwrap!(client.battery_level_write(42).await);
info!("Wrote battery level!");
// Read to check it's changed
let val = unwrap!(client.battery_level_read().await);
info!("read battery level: {}", val);
}
#[entry]
fn main() -> ! {
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: 4,
rc_temp_ctiv: 2,
accuracy: 7,
}),
conn_gap: Some(raw::ble_gap_conn_cfg_t {
conn_count: 6,
event_length: 6,
}),
conn_gatt: Some(raw::ble_gatt_conn_cfg_t { att_mtu: 128 }),
gatts_attr_tab_size: Some(raw::ble_gatts_cfg_attr_tab_size_t { attr_tab_size: 32768 }),
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 executor = EXECUTOR.put(Executor::new());
executor.run(move |spawner| {
unwrap!(spawner.spawn(softdevice_task(sd)));
unwrap!(spawner.spawn(ble_central_task(sd)));
});
}
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