stub base station

2025-03-25 13:25:54 -04:00
parent fa1a8807a2
commit 483e9d9475
4 changed files with 474 additions and 2 deletions
--- a/cellular/Cargo.lock
+++ b/cellular/Cargo.lock
@@ -2,6 +2,394 @@
 # It is not intended for manual editing.
 version = 4

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--- a/cellular/Cargo.toml
+++ b/cellular/Cargo.toml
@@ -4,3 +4,6 @@ version = "0.1.0"
 edition = "2024"

 [dependencies]
+soapysdr = "0.4.1"
+ferris-says = "0.3.1"
+num-complex = "0.4.6"
--- a/cellular/src/main.rs
+++ b/cellular/src/main.rs
@@ -1,3 +1,24 @@
-fn main() {
-    println!("Hello, world!");
+use ferris_says::say;
+use std::io::{stdout, BufWriter};
+
+mod sdr;
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let stdout = stdout();
+    let message = String::from("Welcome to the Cellular Revolution!");
+    let width = message.chars().count();
+
+    let mut writer = BufWriter::new(stdout.lock());
+    say(&message, width, &mut writer).unwrap();
+
+    // test SDR stuff
+    let device_args = sdr::find_device()?;
+    println!("Using device: {}", device_args);
+
+    let transmitter = sdr::SdrTransmitter::new(device_args, 0)?;
+
+    transmitter.transmit_tone(800e6, 1e6, 10e3)?;
+
+    Ok(())
+
 }
--- a/cellular/src/sdr.rs
+++ b/cellular/src/sdr.rs
@@ -0,0 +1,60 @@
+use soapysdr::Direction::Tx;
+use soapysdr::{Device, Args};
+use num_complex::Complex;
+use std::f64::consts::PI;
+
+pub struct SdrTransmitter {
+    dev: Device,
+    channel: usize,
+}
+
+impl SdrTransmitter {
+    // Create a new transmitter instance with specific device args
+    pub fn new(args: Args, channel: usize) -> Result<Self, Box<dyn std::error::Error>> {
+        let dev = Device::new(args)?;
+        Ok(SdrTransmitter { dev, channel })
+    }
+
+    // Transmit a tone
+    pub fn transmit_tone(
+        &self,
+        frequency: f64,
+        sample_rate: f64,
+        tone_freq: f64,
+    ) -> Result<(), Box<dyn std::error::Error>> {
+        self.dev.set_frequency(Tx, self.channel, frequency, ())?;
+        self.dev.set_sample_rate(Tx, self.channel, sample_rate)?;
+
+        let samples: Vec<Complex<f32>> = (0..1000)
+            .map(|i| {
+                let t = i as f64 / sample_rate;
+                let phase = 2.0 * PI * tone_freq * t;
+                Complex::new(phase.cos() as f32, phase.sin() as f32) * 0.5
+            })
+            .collect();
+
+        let mut tx_stream = self.dev.tx_stream::<Complex<f32>>(&[self.channel])?;
+        tx_stream.activate(None)?;
+
+        println!(
+            "Transmitting {} kHz tone at {} MHz...",
+            tone_freq / 1e3,
+            frequency / 1e6
+        );
+        for _ in 0..100 {
+            tx_stream.write(&[&samples], Some(100_000), false, 5)?;
+        }
+
+        tx_stream.deactivate(None)?;
+        println!("Transmission complete!");
+        Ok(())
+    }
+}
+
+// Helper function to create Args for a specific device
+pub fn device_args(driver: &str, serial: Option<&str>) -> Args {
+    match serial {
+        Some(serial) => Args::from(&format!("driver={},serial={}", driver, serial)),
+        None => Args::from(&format!("driver={}", driver)),
+    }
+}