From ed7870839336ba6ef90e14e2d3391d892c2d90d7 Mon Sep 17 00:00:00 2001
From: issy <issy@issy.dev>
Date: Fri, 27 Feb 2026 08:56:47 +0000
Subject: [PATCH 1/4] Add default implementation for parser

---
 firmware/src/midi/mod.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/firmware/src/midi/mod.rs b/firmware/src/midi/mod.rs
index 9a6b9c4..8e95803 100644
--- a/firmware/src/midi/mod.rs
+++ b/firmware/src/midi/mod.rs
@@ -197,3 +197,9 @@ impl MidiParser {
         None
     }
 }
+
+impl Default for MidiParser {
+    fn default() -> Self {
+        Self::new()
+    }
+}

From ca390d3c22f8573787736e177a031d5fec08bbc4 Mon Sep 17 00:00:00 2001
From: issy <issy@issy.dev>
Date: Fri, 27 Feb 2026 09:01:15 +0000
Subject: [PATCH 2/4] Static channel

---
 firmware/src/bin/main.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/firmware/src/bin/main.rs b/firmware/src/bin/main.rs
index b1e3bb2..c10cb0a 100644
--- a/firmware/src/bin/main.rs
+++ b/firmware/src/bin/main.rs
@@ -19,6 +19,7 @@ use esp_alloc as _;
 use esp_backtrace as _;
 
 use embassy_executor::{Spawner, task};
+use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
 use embassy_sync::{blocking_mutex::raw::NoopRawMutex, channel::Channel};
 use esp_hal::Async;
 use esp_hal::clock::CpuClock;
@@ -31,7 +32,7 @@ use log::info;
 // For more information see: <https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-reference/system/app_image_format.html#application-description>
 esp_bootloader_esp_idf::esp_app_desc!();
 
-const MIDI_OUT_CHANNEL: Channel<NoopRawMutex, MidiPacket, 128> = Channel::new();
+static MIDI_OUT_CHANNEL: Channel<CriticalSectionRawMutex, MidiPacket, 128> = Channel::new();
 
 // Forward MIDI messages IN to the MIDI_OUT_CHANNEL
 #[task]

From bd8645399a59f42f4efaf16ad4658f1046d41481 Mon Sep 17 00:00:00 2001
From: issy <issy@issy.dev>
Date: Fri, 27 Feb 2026 09:03:48 +0000
Subject: [PATCH 3/4] Non-empty loop

---
 firmware/src/bin/main.rs | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/firmware/src/bin/main.rs b/firmware/src/bin/main.rs
index c10cb0a..3fe199e 100644
--- a/firmware/src/bin/main.rs
+++ b/firmware/src/bin/main.rs
@@ -20,11 +20,13 @@ use esp_backtrace as _;
 
 use embassy_executor::{Spawner, task};
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
-use embassy_sync::{blocking_mutex::raw::NoopRawMutex, channel::Channel};
+use embassy_sync::channel::Channel;
+use embassy_time::{Delay, Timer};
 use esp_hal::Async;
 use esp_hal::clock::CpuClock;
 use esp_hal::timer::timg::TimerGroup;
 use esp_hal::uart::{Config as UartConfig, DataBits, Parity, StopBits, Uart, UartRx, UartTx};
+use esp_println::println;
 use firmware::midi::{MidiPacket, MidiParser};
 use log::info;
 
@@ -102,5 +104,9 @@ async fn main(spawner: Spawner) -> ! {
     info!("MIDI out task spawned");
 
     info!("Startup complete.");
-    loop {}
+
+    loop {
+        Timer::after_secs(1).await;
+        println!("Heartbeat");
+    }
 }

From 8451d658da5246cb67a909a20a822cbfa018f3cf Mon Sep 17 00:00:00 2001
From: issy <issy@issy.dev>
Date: Fri, 27 Feb 2026 09:04:25 +0000
Subject: [PATCH 4/4] Remove unused import

---
 firmware/src/bin/main.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/firmware/src/bin/main.rs b/firmware/src/bin/main.rs
index 3fe199e..d78c435 100644
--- a/firmware/src/bin/main.rs
+++ b/firmware/src/bin/main.rs
@@ -21,7 +21,7 @@ use esp_backtrace as _;
 use embassy_executor::{Spawner, task};
 use embassy_sync::blocking_mutex::raw::CriticalSectionRawMutex;
 use embassy_sync::channel::Channel;
-use embassy_time::{Delay, Timer};
+use embassy_time::Timer;
 use esp_hal::Async;
 use esp_hal::clock::CpuClock;
 use esp_hal::timer::timg::TimerGroup;