From 9498885af12546dd2cf181faa2900e0c5eae67dc Mon Sep 17 00:00:00 2001
From: Stephen D <webmaster@scd31.com>
Date: Fri, 23 Feb 2024 19:44:16 -0400
Subject: [PATCH] add bias-T config
---
config.example.toml | 1 +
src/config.rs | 2 ++
src/decoder/mod.rs | 8 +++++++-
src/decoder/rtl.rs | 10 +++++++++-
4 files changed, 19 insertions(+), 2 deletions(-)
diff --git a/config.example.toml b/config.example.toml
index e90621d..a662c67 100644
--- a/config.example.toml
+++ b/config.example.toml
@@ -1,6 +1,7 @@
# rtl_fm parameters
frequency = 430_500_000 # center frequency, Hz
device_id = "0" # ID of your RTL-SDR; 0 is default
+bias_t = false
# gain = 30.0 # dB. Uses AGC when not specified
# if set to true:
diff --git a/src/config.rs b/src/config.rs
index fae5464..7c4a853 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -37,6 +37,8 @@ pub struct Config {
pub frequency: u32,
#[serde(default = "default_device_id")]
pub device_id: String,
+ #[serde(default)]
+ pub bias_t: bool,
pub gain: Option<f32>,
#[serde(default)]
pub use_stdin: bool,
diff --git a/src/decoder/mod.rs b/src/decoder/mod.rs
index 3457fae..5f5e858 100644
--- a/src/decoder/mod.rs
+++ b/src/decoder/mod.rs
@@ -27,7 +27,13 @@ pub fn decode_forever(felinet_send: mpsc::Sender<SemiPacketIn>, config: &Config,
Box::new(stdin.bytes().map(|x| x.expect("Could not read from stdin")))
} else {
- let rtl = RtlSdr::new(config.frequency, &config.device_id, config.gain).unwrap();
+ let rtl = RtlSdr::new(
+ config.frequency,
+ &config.device_id,
+ config.gain,
+ config.bias_t,
+ )
+ .unwrap();
Box::new(rtl)
};
diff --git a/src/decoder/rtl.rs b/src/decoder/rtl.rs
index 7e7bb07..060cd66 100644
--- a/src/decoder/rtl.rs
+++ b/src/decoder/rtl.rs
@@ -11,7 +11,12 @@ pub struct RtlSdr {
}
impl RtlSdr {
- pub fn new(freq: u32, device_id: &str, gain: Option<f32>) -> anyhow::Result<Self> {
+ pub fn new(
+ freq: u32,
+ device_id: &str,
+ gain: Option<f32>,
+ bias_t: bool,
+ ) -> anyhow::Result<Self> {
let freq = format!("{freq}");
let mut args = vec![
"rtl_fm", "-f", &freq, "-M", "raw", "-F9", "-p", "0", "-d", device_id, "-s", "48000",
@@ -22,6 +27,9 @@ impl RtlSdr {
gain_s.push_str(&format!("{:.2}", g));
args.push(&gain_s);
}
+ if bias_t {
+ args.push("-T");
+ }
let mut process = Popen::create(
&args,
PopenConfig {
--
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