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