116 lines
3.7 KiB
Rust
116 lines
3.7 KiB
Rust
//! This example runs on the STM32WL board, which has a builtin Semtech Sx1262 radio.
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//! It demonstrates LORA P2P receive functionality in conjunction with the lora_p2p_send example.
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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, async_fn_in_trait)]
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use defmt::info;
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use embassy_executor::Spawner;
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use embassy_lora::iv::Stm32wlInterfaceVariant;
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use embassy_stm32::gpio::{Level, Output, Pin, Speed};
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use embassy_stm32::spi::Spi;
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use embassy_stm32::{interrupt, into_ref, Peripheral};
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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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#[embassy_executor::main]
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async fn main(_spawner: Spawner) {
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let mut config = embassy_stm32::Config::default();
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config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSE32;
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let p = embassy_stm32::init(config);
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let spi = Spi::new_subghz(p.SUBGHZSPI, p.DMA1_CH1, p.DMA1_CH2);
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let irq = interrupt::take!(SUBGHZ_RADIO);
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into_ref!(irq);
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// Set CTRL1 and CTRL3 for high-power transmission, while CTRL2 acts as an RF switch between tx and rx
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let _ctrl1 = Output::new(p.PC4.degrade(), Level::Low, Speed::High);
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let ctrl2 = Output::new(p.PC5.degrade(), Level::High, Speed::High);
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let _ctrl3 = Output::new(p.PC3.degrade(), Level::High, Speed::High);
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let iv = Stm32wlInterfaceVariant::new(irq, None, Some(ctrl2)).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::Stm32wlSx1262, spi, 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.PB9, Level::Low, Speed::Low);
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let mut start_indicator = Output::new(p.PB15, Level::Low, Speed::Low);
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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 mut receiving_buffer = [00u8; 100];
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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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let rx_pkt_params = {
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match lora.create_rx_packet_params(4, false, receiving_buffer.len() as u8, true, false, &mdltn_params) {
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Ok(pp) => pp,
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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
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.prepare_for_rx(&mdltn_params, &rx_pkt_params, None, true, false, 0, 0x00ffffffu32)
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.await
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{
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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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loop {
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receiving_buffer = [00u8; 100];
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match lora.rx(&rx_pkt_params, &mut receiving_buffer).await {
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Ok((received_len, _rx_pkt_status)) => {
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if (received_len == 3)
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&& (receiving_buffer[0] == 0x01u8)
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&& (receiving_buffer[1] == 0x02u8)
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&& (receiving_buffer[2] == 0x03u8)
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{
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info!("rx successful");
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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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} else {
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info!("rx unknown packet");
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}
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}
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Err(err) => info!("rx unsuccessful = {}", err),
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}
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}
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}
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