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use core::future::Future;
use defmt::Format;
use embedded_hal::digital::v2::OutputPin;
use embedded_hal_async::digital::Wait;
use embedded_hal_async::spi::*;
use lorawan_device::async_device::radio::{PhyRxTx, RfConfig, RxQuality, TxConfig};
use lorawan_device::async_device::Timings;
mod sx126x_lora;
use sx126x_lora::LoRa;
use self::sx126x_lora::mod_params::RadioError;
/// Semtech Sx126x LoRa peripheral
pub struct Sx126xRadio<SPI, CS, RESET, ANTRX, ANTTX, WAIT, BUS>
where
SPI: SpiBus<u8, Error = BUS> + 'static,
CS: OutputPin + 'static,
RESET: OutputPin + 'static,
ANTRX: OutputPin + 'static,
ANTTX: OutputPin + 'static,
WAIT: Wait + 'static,
BUS: Error + Format + 'static,
{
pub lora: LoRa<SPI, CS, RESET, ANTRX, ANTTX, WAIT>,
}
impl<SPI, CS, RESET, ANTRX, ANTTX, WAIT, BUS> Sx126xRadio<SPI, CS, RESET, ANTRX, ANTTX, WAIT, BUS>
where
SPI: SpiBus<u8, Error = BUS> + 'static,
CS: OutputPin + 'static,
RESET: OutputPin + 'static,
ANTRX: OutputPin + 'static,
ANTTX: OutputPin + 'static,
WAIT: Wait + 'static,
BUS: Error + Format + 'static,
{
pub async fn new(
spi: SPI,
cs: CS,
reset: RESET,
antenna_rx: ANTRX,
antenna_tx: ANTTX,
dio1: WAIT,
busy: WAIT,
enable_public_network: bool,
) -> Result<Self, RadioError<BUS>> {
let mut lora = LoRa::new(spi, cs, reset, antenna_rx, antenna_tx, dio1, busy);
lora.init().await?;
lora.set_lora_modem(enable_public_network).await?;
Ok(Self { lora })
}
}
impl<SPI, CS, RESET, ANTRX, ANTTX, WAIT, BUS> Timings for Sx126xRadio<SPI, CS, RESET, ANTRX, ANTTX, WAIT, BUS>
where
SPI: SpiBus<u8, Error = BUS> + 'static,
CS: OutputPin + 'static,
RESET: OutputPin + 'static,
ANTRX: OutputPin + 'static,
ANTTX: OutputPin + 'static,
WAIT: Wait + 'static,
BUS: Error + Format + 'static,
{
fn get_rx_window_offset_ms(&self) -> i32 {
-500
}
fn get_rx_window_duration_ms(&self) -> u32 {
800
}
}
impl<SPI, CS, RESET, ANTRX, ANTTX, WAIT, BUS> PhyRxTx for Sx126xRadio<SPI, CS, RESET, ANTRX, ANTTX, WAIT, BUS>
where
SPI: SpiBus<u8, Error = BUS> + 'static,
CS: OutputPin + 'static,
RESET: OutputPin + 'static,
ANTRX: OutputPin + 'static,
ANTTX: OutputPin + 'static,
WAIT: Wait + 'static,
BUS: Error + Format + 'static,
{
type PhyError = RadioError<BUS>;
type TxFuture<'m> = impl Future<Output = Result<u32, Self::PhyError>> + 'm
where
SPI: 'm,
CS: 'm,
RESET: 'm,
ANTRX: 'm,
ANTTX: 'm,
WAIT: 'm,
BUS: 'm;
fn tx<'m>(&'m mut self, config: TxConfig, buffer: &'m [u8]) -> Self::TxFuture<'m> {
trace!("TX START");
async move {
self.lora
.set_tx_config(
config.pw,
config.rf.spreading_factor.into(),
config.rf.bandwidth.into(),
config.rf.coding_rate.into(),
4,
false,
true,
false,
0,
false,
)
.await?;
self.lora.set_max_payload_length(buffer.len() as u8).await?;
self.lora.set_channel(config.rf.frequency).await?;
self.lora.send(buffer, 0xffffff).await?;
self.lora.process_irq(None, None, None).await?;
trace!("TX DONE");
return Ok(0);
}
}
type RxFuture<'m> = impl Future<Output = Result<(usize, RxQuality), Self::PhyError>> + 'm
where
SPI: 'm,
CS: 'm,
RESET: 'm,
ANTRX: 'm,
ANTTX: 'm,
WAIT: 'm,
BUS: 'm;
fn rx<'m>(&'m mut self, config: RfConfig, receiving_buffer: &'m mut [u8]) -> Self::RxFuture<'m> {
trace!("RX START");
async move {
self.lora
.set_rx_config(
config.spreading_factor.into(),
config.bandwidth.into(),
config.coding_rate.into(),
4,
4,
false,
0u8,
true,
false,
0,
false,
true,
)
.await?;
self.lora.set_max_payload_length(receiving_buffer.len() as u8).await?;
self.lora.set_channel(config.frequency).await?;
self.lora.rx(90 * 1000).await?;
let mut received_len = 0u8;
self.lora
.process_irq(Some(receiving_buffer), Some(&mut received_len), None)
.await?;
trace!("RX DONE");
let packet_status = self.lora.get_latest_packet_status();
let mut rssi = 0i16;
let mut snr = 0i8;
if packet_status.is_some() {
rssi = packet_status.unwrap().rssi as i16;
snr = packet_status.unwrap().snr;
}
Ok((received_len as usize, RxQuality::new(rssi, snr)))
}
}
}
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