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#![no_std]
#![no_main]
#![feature(type_alias_impl_trait)]
#[path = "../example_common.rs"]
mod example_common;
use core::ptr::NonNull;
use core::{mem, slice};
use cortex_m_rt::entry;
use defmt::{info, *};
use embassy::executor::Executor;
use embassy::util::Forever;
use nrf_softdevice::ble::l2cap::Packet as _;
use nrf_softdevice::ble::{central, l2cap, Address, TxPower};
use nrf_softdevice::{raw, Softdevice};
static EXECUTOR: Forever<Executor> = Forever::new();
const PSM: u16 = 0x2349;
#[embassy::task]
async fn softdevice_task(sd: &'static Softdevice) {
sd.run().await;
}
#[embassy::task]
async fn ble_central_task(sd: &'static Softdevice) {
info!("Scanning for peer...");
let config = central::ScanConfig {
whitelist: None,
tx_power: TxPower::ZerodBm,
..Default::default()
};
let res = central::scan(sd, &config, |params| unsafe {
let mut data = slice::from_raw_parts(params.data.p_data, params.data.len as usize);
while data.len() != 0 {
let len = data[0] as usize;
if data.len() < len + 1 {
break;
}
if len < 1 {
break;
}
let key = data[1];
let value = &data[2..len + 1];
if key == 0x06
&& value
== &[
0xeb, 0x04, 0x8b, 0xfd, 0x5b, 0x03, 0x21, 0xb5, 0xeb, 0x11, 0x65, 0x2f, 0x18, 0xce, 0x9c, 0x82,
]
{
return Some(Address::from_raw(params.peer_addr));
}
data = &data[len + 1..];
}
None
})
.await;
let address = unwrap!(res);
info!("Scan found address {:?}", address);
let addrs = &[&address];
let mut config = central::ConnectConfig::default();
config.scan_config.whitelist = Some(addrs);
let conn = unwrap!(central::connect(sd, &config).await);
info!("connected");
let l = l2cap::L2cap::<Packet>::init(sd);
let config = l2cap::Config { credits: 8 };
let ch = unwrap!(l.setup(&conn, &config, PSM).await);
info!("l2cap connected");
for i in 0..10 {
unwrap!(ch.tx(Packet::new(&[i; Packet::MTU])).await);
info!("l2cap tx done");
}
futures::future::pending::<()>().await;
}
use atomic_pool::{pool, Box};
pool!(PacketPool: [[u8; 512]; 10]);
struct Packet {
len: usize,
buf: Box<PacketPool>,
}
impl Format for Packet {
fn format(&self, fmt: Formatter) {
defmt::write!(fmt, "Packet({:x})", &self.buf[..self.len])
}
}
impl Packet {
fn new(data: &[u8]) -> Self {
let mut buf = unwrap!(Box::<PacketPool>::new([0; 512]));
buf[..data.len()].copy_from_slice(data);
Packet { len: data.len(), buf }
}
}
impl l2cap::Packet for Packet {
const MTU: usize = 512;
fn allocate() -> Option<NonNull<u8>> {
if let Some(buf) = Box::<PacketPool>::new([0; 512]) {
let ptr = Box::into_raw(buf).cast::<u8>();
info!("allocate {}", ptr.as_ptr() as u32);
Some(ptr)
} else {
None
}
}
fn into_raw_parts(self) -> (NonNull<u8>, usize) {
let ptr = Box::into_raw(self.buf).cast::<u8>();
let len = self.len;
info!("into_raw_parts {}", ptr.as_ptr() as u32);
(ptr, len)
}
unsafe fn from_raw_parts(ptr: NonNull<u8>, len: usize) -> Self {
info!("from_raw_parts {}", ptr.as_ptr() as u32);
Self {
len,
buf: Box::from_raw(ptr.cast::<[u8; 512]>()),
}
}
}
#[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: 20,
event_length: 180,
}),
conn_gatt: Some(raw::ble_gatt_conn_cfg_t { att_mtu: 114 }),
conn_gattc: Some(raw::ble_gattc_conn_cfg_t {
write_cmd_tx_queue_size: 0,
}),
conn_gatts: Some(raw::ble_gatts_conn_cfg_t { hvn_tx_queue_size: 0 }),
gatts_attr_tab_size: Some(raw::ble_gatts_cfg_attr_tab_size_t { attr_tab_size: 512 }),
gap_role_count: Some(raw::ble_gap_cfg_role_count_t {
adv_set_count: 1,
periph_role_count: 5,
central_role_count: 15,
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),
}),
conn_l2cap: Some(raw::ble_l2cap_conn_cfg_t {
ch_count: 1,
rx_mps: 247,
tx_mps: 247,
rx_queue_size: 10,
tx_queue_size: 10,
}),
..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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