Add external LoRa physical layer functionality.

1 files changed, 120 insertions, 0 deletions

diff --git a/examples/stm32l0/src/bin/lora_p2p_receive.rs b/examples/stm32l0/src/bin/lora_p2p_receive.rs
new file mode 100644
index 000000000..a5c5f75ea
--- /dev/null
+++ b/examples/stm32l0/src/bin/lora_p2p_receive.rs
@@ -0,0 +1,120 @@
+//! This example runs on the STM32 LoRa Discovery board, which has a builtin Semtech Sx1276 radio.
+//! It demonstrates LORA P2P receive functionality.
+#![no_std]
+#![no_main]
+#![macro_use]
+#![feature(type_alias_impl_trait)]
+
+use defmt::*;
+use embassy_executor::Spawner;
+use embassy_lora::iv::Stm32l0InterfaceVariant;
+use embassy_stm32::exti::{Channel, ExtiInput};
+use embassy_stm32::gpio::{Input, Level, Output, Pin, Pull, Speed};
+use embassy_stm32::spi;
+use embassy_stm32::time::khz;
+use embassy_time::{Delay, Duration, Timer};
+use lora_phy::mod_params::*;
+use lora_phy::sx1276_7_8_9::SX1276_7_8_9;
+use lora_phy::LoRa;
+use {defmt_rtt as _, panic_probe as _};
+
+#[embassy_executor::main]
+async fn main(_spawner: Spawner) {
+    let mut config = embassy_stm32::Config::default();
+    config.rcc.mux = embassy_stm32::rcc::ClockSrc::HSI16;
+    config.rcc.enable_hsi48 = true;
+    let p = embassy_stm32::init(config);
+
+    // SPI for sx1276
+    let spi = spi::Spi::new(
+        p.SPI1,
+        p.PB3,
+        p.PA7,
+        p.PA6,
+        p.DMA1_CH3,
+        p.DMA1_CH2,
+        khz(200),
+        spi::Config::default(),
+    );
+
+    let nss = Output::new(p.PA15.degrade(), Level::High, Speed::Low);
+    let reset = Output::new(p.PC0.degrade(), Level::High, Speed::Low);
+
+    let irq_pin = Input::new(p.PB4.degrade(), Pull::Up);
+    let irq = ExtiInput::new(irq_pin, p.EXTI4.degrade());
+
+    let iv = Stm32l0InterfaceVariant::new(nss, reset, irq, None, None).unwrap();
+
+    let mut delay = Delay;
+
+    let mut lora = {
+        match LoRa::new(SX1276_7_8_9::new(BoardType::Stm32l0Sx1276, spi, iv), false, &mut delay).await {
+            Ok(l) => l,
+            Err(err) => {
+                info!("Radio error = {}", err);
+                return;
+            }
+        }
+    };
+
+    let mut debug_indicator = Output::new(p.PB5, Level::Low, Speed::Low);
+    let mut start_indicator = Output::new(p.PB6, 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, 903900000) {
+            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, true, false, 0, 0x00ffffffu32)
+        .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),
+        }
+    }
+}