From 3bad1b474fb80856049d4c6a0eaad3a2a71c2cc8 Mon Sep 17 00:00:00 2001
From: JP Stringham <jp@bloomdigital.to>
Date: Fri, 13 Feb 2026 23:08:16 -0500
Subject: [PATCH] HUGE FIX for frequency setting

---
 src/main.rs | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/src/main.rs b/src/main.rs
index d252563..1dc35c3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -128,8 +128,7 @@ fn main() -> ! {
     const MAX_TUNE: u16 = 350u16;
     const MIN_TUNE: u16 = 4u16;
 
-    pwm0.set_top(current_tune);
-    pwm0.channel_a.set_duty(current_tune / 2);
+    set_tune(current_tune, pwm0);
 
     // Create the I²C drive
     let mut i2c = hal::I2C::i2c0(
@@ -156,7 +155,7 @@ fn main() -> ! {
             gfx_buf.clear();
             gfx_buf.draw_string(20, 14, "Hello Radio!");
 
-            let tuned_freq = 272_000u32 / (current_tune as u32);
+            let tuned_freq = 300_000 / (current_tune as u32);
             let mut tune_str_buf = [0u8; 5];
             let len = u32_into_str(tuned_freq, &mut tune_str_buf);
             let tune_str = str::from_utf8(&tune_str_buf[tune_str_buf.len() - len..]).unwrap();
@@ -201,24 +200,30 @@ fn main() -> ! {
         }
 
         if tune_up_input.is_low().unwrap() {
-            info!("Tune UP");
+            info!("Tune DOWN");
             last_input = tick;
             current_tune = MAX_TUNE.min(current_tune + 2);
-            pwm0.set_top(current_tune);
-            pwm0.channel_a.set_duty(current_tune / 2);
+            set_tune(current_tune, pwm0);
             continue;
         }
 
         if tune_dn_input.is_low().unwrap() {
-            info!("Tune DOWN");
+            info!("Tune UP");
             last_input = tick;
             current_tune = MIN_TUNE.max(current_tune - 2);
-            pwm0.set_top(current_tune);
-            pwm0.channel_a.set_duty(current_tune / 2);
+            set_tune(current_tune, pwm0);
         }
     }
 }
 
+fn set_tune(
+    tune: u16,
+    pwm: &mut rp2040_hal::pwm::Slice<rp2040_hal::pwm::Pwm0, rp2040_hal::pwm::FreeRunning>,
+) {
+    pwm.set_top(tune - 1);
+    pwm.channel_a.set_duty(tune / 2);
+}
+
 // returns the length of the final str removing leading zeroes
 fn u32_into_str(mut value: u32, str_buf: &mut [u8]) -> usize {
     let mut len = str_buf.len();