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//! This example runs on the STM32WL board, which has a builtin Semtech Sx1262 radio.
//! It demonstrates LORA P2P receive functionality in conjunction with the lora_p2p_send example.
#![no_std]
#![no_main]
#![macro_use]
#![feature(type_alias_impl_trait, async_fn_in_trait)]
use defmt::info;
use embassy_executor::Spawner;
use embassy_lora::iv::{InterruptHandler, Stm32wlInterfaceVariant};
use embassy_stm32::bind_interrupts;
use embassy_stm32::gpio::{Level, Output, Pin, Speed};
use embassy_stm32::spi::Spi;
use embassy_time::{Delay, Duration, 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{
SUBGHZ_RADIO => InterruptHandler;
});
#[embassy_executor::main]
async fn main(_spawner: Spawner) {
let mut config = embassy_stm32::Config::default();
config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSE;
let p = embassy_stm32::init(config);
let spi = Spi::new_subghz(p.SUBGHZSPI, p.DMA1_CH1, p.DMA1_CH2);
// Set CTRL1 and CTRL3 for high-power transmission, while CTRL2 acts as an RF switch between tx and rx
let _ctrl1 = Output::new(p.PC4.degrade(), Level::Low, Speed::High);
let ctrl2 = Output::new(p.PC5.degrade(), Level::High, Speed::High);
let _ctrl3 = Output::new(p.PC3.degrade(), Level::High, Speed::High);
let iv = Stm32wlInterfaceVariant::new(Irqs, None, Some(ctrl2)).unwrap();
let mut lora = {
match LoRa::new(SX1261_2::new(BoardType::Stm32wlSx1262, spi, iv), false, Delay).await {
Ok(l) => l,
Err(err) => {
info!("Radio error = {}", err);
return;
}
}
};
let mut debug_indicator = Output::new(p.PB9, Level::Low, Speed::Low);
let mut start_indicator = Output::new(p.PB15, Level::Low, Speed::Low);
start_indicator.set_high();
Timer::after(Duration::from_secs(5)).await;
start_indicator.set_low();
let mut receiving_buffer = [00u8; 100];
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;
}
}
};
let rx_pkt_params = {
match lora.create_rx_packet_params(4, false, receiving_buffer.len() as u8, true, false, &mdltn_params) {
Ok(pp) => pp,
Err(err) => {
info!("Radio error = {}", err);
return;
}
}
};
match lora
.prepare_for_rx(&mdltn_params, &rx_pkt_params, None, None, false)
.await
{
Ok(()) => {}
Err(err) => {
info!("Radio error = {}", err);
return;
}
};
loop {
receiving_buffer = [00u8; 100];
match lora.rx(&rx_pkt_params, &mut receiving_buffer).await {
Ok((received_len, _rx_pkt_status)) => {
if (received_len == 3)
&& (receiving_buffer[0] == 0x01u8)
&& (receiving_buffer[1] == 0x02u8)
&& (receiving_buffer[2] == 0x03u8)
{
info!("rx successful");
debug_indicator.set_high();
Timer::after(Duration::from_secs(5)).await;
debug_indicator.set_low();
} else {
info!("rx unknown packet");
}
}
Err(err) => info!("rx unsuccessful = {}", err),
}
}
}
|
