121 lines
4.1 KiB
Rust
121 lines
4.1 KiB
Rust
#![no_std]
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#![no_main]
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#![macro_use]
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#![allow(dead_code)]
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#![feature(generic_associated_types)]
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#![feature(type_alias_impl_trait)]
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use defmt::*;
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use embassy::channel::signal::Signal;
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use embassy_stm32::dma::NoDma;
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use embassy_stm32::exti::ExtiInput;
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use embassy_stm32::gpio::{Input, Level, Output, Pull, Speed};
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use embassy_stm32::interrupt::{Interrupt, InterruptExt};
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use embassy_stm32::subghz::*;
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use embassy_stm32::{interrupt, Peripherals};
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use {defmt_rtt as _, panic_probe as _};
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const PING_DATA: &str = "PING";
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const DATA_LEN: u8 = PING_DATA.len() as u8;
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const PING_DATA_BYTES: &[u8] = PING_DATA.as_bytes();
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const PREAMBLE_LEN: u16 = 5 * 8;
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const RF_FREQ: RfFreq = RfFreq::from_frequency(867_500_000);
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const SYNC_WORD: [u8; 8] = [0x79, 0x80, 0x0C, 0xC0, 0x29, 0x95, 0xF8, 0x4A];
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const SYNC_WORD_LEN: u8 = SYNC_WORD.len() as u8;
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const SYNC_WORD_LEN_BITS: u8 = SYNC_WORD_LEN * 8;
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const TX_BUF_OFFSET: u8 = 128;
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const RX_BUF_OFFSET: u8 = 0;
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const LORA_PACKET_PARAMS: LoRaPacketParams = LoRaPacketParams::new()
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.set_crc_en(true)
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.set_preamble_len(PREAMBLE_LEN)
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.set_payload_len(DATA_LEN)
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.set_invert_iq(false)
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.set_header_type(HeaderType::Fixed);
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const LORA_MOD_PARAMS: LoRaModParams = LoRaModParams::new()
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.set_bw(LoRaBandwidth::Bw125)
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.set_cr(CodingRate::Cr45)
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.set_ldro_en(true)
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.set_sf(SpreadingFactor::Sf7);
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// configuration for +10 dBm output power
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// see table 35 "PA optimal setting and operating modes"
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const PA_CONFIG: PaConfig = PaConfig::new().set_pa_duty_cycle(0x1).set_hp_max(0x0).set_pa(PaSel::Lp);
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const TCXO_MODE: TcxoMode = TcxoMode::new()
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.set_txco_trim(TcxoTrim::Volts1pt7)
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.set_timeout(Timeout::from_duration_sat(core::time::Duration::from_millis(10)));
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const TX_PARAMS: TxParams = TxParams::new().set_power(0x0D).set_ramp_time(RampTime::Micros40);
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fn config() -> embassy_stm32::Config {
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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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config
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}
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#[embassy::main(config = "config()")]
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async fn main(_spawner: embassy::executor::Spawner, p: Peripherals) {
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let mut led1 = Output::new(p.PB15, Level::High, Speed::Low);
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let mut led2 = Output::new(p.PB9, Level::Low, Speed::Low);
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let mut led3 = Output::new(p.PB11, Level::Low, Speed::Low);
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let button = Input::new(p.PA0, Pull::Up);
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let mut pin = ExtiInput::new(button, p.EXTI0);
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static IRQ_SIGNAL: Signal<()> = Signal::new();
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let radio_irq = interrupt::take!(SUBGHZ_RADIO);
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radio_irq.set_handler(|_| {
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IRQ_SIGNAL.signal(());
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unsafe { interrupt::SUBGHZ_RADIO::steal() }.disable();
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});
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let mut radio = SubGhz::new(p.SUBGHZSPI, p.PA5, p.PA7, p.PA6, NoDma, NoDma);
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defmt::info!("Radio ready for use");
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led1.set_low();
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led2.set_high();
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unwrap!(radio.set_standby(StandbyClk::Rc));
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unwrap!(radio.set_tcxo_mode(&TCXO_MODE));
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unwrap!(radio.set_standby(StandbyClk::Hse));
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unwrap!(radio.set_regulator_mode(RegMode::Ldo));
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unwrap!(radio.set_buffer_base_address(TX_BUF_OFFSET, RX_BUF_OFFSET));
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unwrap!(radio.set_pa_config(&PA_CONFIG));
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unwrap!(radio.set_pa_ocp(Ocp::Max60m));
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unwrap!(radio.set_tx_params(&TX_PARAMS));
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unwrap!(radio.set_packet_type(PacketType::LoRa));
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unwrap!(radio.set_lora_sync_word(LoRaSyncWord::Public));
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unwrap!(radio.set_lora_mod_params(&LORA_MOD_PARAMS));
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unwrap!(radio.set_lora_packet_params(&LORA_PACKET_PARAMS));
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unwrap!(radio.calibrate_image(CalibrateImage::ISM_863_870));
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unwrap!(radio.set_rf_frequency(&RF_FREQ));
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defmt::info!("Status: {:?}", unwrap!(radio.status()));
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led2.set_low();
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loop {
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pin.wait_for_rising_edge().await;
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led3.set_high();
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unwrap!(radio.set_irq_cfg(&CfgIrq::new().irq_enable_all(Irq::TxDone)));
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unwrap!(radio.write_buffer(TX_BUF_OFFSET, PING_DATA_BYTES));
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unwrap!(radio.set_tx(Timeout::DISABLED));
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radio_irq.enable();
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IRQ_SIGNAL.wait().await;
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let (_, irq_status) = unwrap!(radio.irq_status());
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if irq_status & Irq::TxDone.mask() != 0 {
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defmt::info!("TX done");
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}
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unwrap!(radio.clear_irq_status(irq_status));
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led3.set_low();
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}
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}
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