Add lora-phy examples.

examples/stm32l0/src/bin/lora_p2p_receive.rs

@@ -1,5 +1,5 @@
 //! This example runs on the STM32 LoRa Discovery board, which has a builtin Semtech Sx1276 radio.
-//! It demonstrates LORA P2P receive functionality.
+//! It demonstrates LORA P2P receive functionality in conjunction with the lora_p2p_send example.
 #![no_std]
 #![no_main]
 #![macro_use]
@@ -18,6 +18,8 @@ use lora_phy::sx1276_7_8_9::SX1276_7_8_9;
 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
+
 #[embassy_executor::main]
 async fn main(_spawner: Spawner) {
     let mut config = embassy_stm32::Config::default();
@@ -67,7 +69,12 @@ async fn main(_spawner: Spawner) {
     let mut receiving_buffer = [00u8; 100];
 
     let mdltn_params = {
-        match lora.create_modulation_params(SpreadingFactor::_10, Bandwidth::_250KHz, CodingRate::_4_8, 903900000) {
+        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);