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//! This example runs on the RAK4631 WisBlock, which has an nRF52840 MCU and Semtech Sx126x radio.
//! Other nrf/sx126x combinations may work with appropriate pin modifications.
//! It demonstrates LORA CAD functionality.
#![no_std]
#![no_main]
#![macro_use]
#![feature(type_alias_impl_trait)]
use defmt::*;
use embassy_executor::Spawner;
use embassy_lora::iv::GenericSx126xInterfaceVariant;
use embassy_nrf::gpio::{Input, Level, Output, OutputDrive, Pin as _, Pull};
use embassy_nrf::{bind_interrupts, peripherals, spim};
use embassy_time::{Delay, Timer};
use lora_phy::mod_params::*;
use lora_phy::sx1261_2::SX1261_2;
use lora_phy::LoRa;
use {defmt_rtt as _, panic_probe as _};
const LORA_FREQUENCY_IN_HZ: u32 = 903_900_000; // warning: set this appropriately for the region
bind_interrupts!(struct Irqs {
SPIM1_SPIS1_TWIM1_TWIS1_SPI1_TWI1 => spim::InterruptHandler<peripherals::TWISPI1>;
});
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let p = embassy_nrf::init(Default::default());
let mut spi_config = spim::Config::default();
spi_config.frequency = spim::Frequency::M16;
let spim = spim::Spim::new(p.TWISPI1, Irqs, p.P1_11, p.P1_13, p.P1_12, spi_config);
let nss = Output::new(p.P1_10.degrade(), Level::High, OutputDrive::Standard);
let reset = Output::new(p.P1_06.degrade(), Level::High, OutputDrive::Standard);
let dio1 = Input::new(p.P1_15.degrade(), Pull::Down);
let busy = Input::new(p.P1_14.degrade(), Pull::Down);
let rf_switch_rx = Output::new(p.P1_05.degrade(), Level::Low, OutputDrive::Standard);
let rf_switch_tx = Output::new(p.P1_07.degrade(), Level::Low, OutputDrive::Standard);
let iv =
GenericSx126xInterfaceVariant::new(nss, reset, dio1, busy, Some(rf_switch_rx), Some(rf_switch_tx)).unwrap();
let mut lora = {
match LoRa::new(SX1261_2::new(BoardType::Rak4631Sx1262, spim, iv), false, Delay).await {
Ok(l) => l,
Err(err) => {
info!("Radio error = {}", err);
return;
}
}
};
let mut debug_indicator = Output::new(p.P1_03, Level::Low, OutputDrive::Standard);
let mut start_indicator = Output::new(p.P1_04, Level::Low, OutputDrive::Standard);
start_indicator.set_high();
Timer::after_secs(5).await;
start_indicator.set_low();
let mdltn_params = {
match lora.create_modulation_params(
SpreadingFactor::_10,
Bandwidth::_250KHz,
CodingRate::_4_8,
LORA_FREQUENCY_IN_HZ,
) {
Ok(mp) => mp,
Err(err) => {
info!("Radio error = {}", err);
return;
}
}
};
match lora.prepare_for_cad(&mdltn_params, true).await {
Ok(()) => {}
Err(err) => {
info!("Radio error = {}", err);
return;
}
};
match lora.cad().await {
Ok(cad_activity_detected) => {
if cad_activity_detected {
info!("cad successful with activity detected")
} else {
info!("cad successful without activity detected")
}
debug_indicator.set_high();
Timer::after_secs(5).await;
debug_indicator.set_low();
}
Err(err) => info!("cad unsuccessful = {}", err),
}
}
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