sphinx-key: customize button loop stack size

go from 10K bytes to 2.5K

sphinx-key/src/btn.rs

@@ -5,11 +5,13 @@ mod periph;
 mod status;
 
 pub use crate::core::control::FlashPersister;
+use esp_idf_hal::gpio::Gpio9;
 use esp_idf_hal::peripherals::Peripherals;
 use esp_idf_svc::nvs::EspDefaultNvsPartition;
 use esp_idf_svc::nvs::EspNvs;
 use esp_idf_svc::nvs::*;
 use esp_idf_sys as _; // If using the `binstart` feature of `esp-idf-sys`, always keep this module imported
+use log;
 use status::Status;
 use std::sync::mpsc;
 use std::sync::{Arc, Mutex};
@@ -36,7 +38,12 @@ fn main() -> anyhow::Result<()> {
     let default_nvs = EspDefaultNvsPartition::take()?;
     let flash_per = FlashPersister::new(default_nvs.clone());
     let flash_arc = Arc::new(Mutex::new(flash_per));
-    periph::button::button_loop(pins.gpio9, led_tx.clone(), flash_arc);
+    while let Err(e) =
+        periph::button::button_loop(unsafe { Gpio9::new() }, led_tx.clone(), flash_arc.clone())
+    {
+        log::error!("unable to spawn button thread: {:?}", e);
+        thread::sleep(Duration::from_millis(1000));
+    }
 
     loop {
         thread::sleep(Duration::from_millis(1000));

sphinx-key/src/main.rs

@@ -14,18 +14,17 @@ use crate::periph::sd::{mount_sd_card, simple_fs_test};
 use crate::status::Status;
 
 use anyhow::Result;
+use esp_idf_hal::gpio::Gpio9;
+use esp_idf_hal::peripherals::Peripherals;
+use esp_idf_svc::nvs::EspDefaultNvsPartition;
 use esp_idf_sys as _; // If using the `binstart` feature of `esp-idf-sys`, always keep this module imported
+use sphinx_signer::lightning_signer::bitcoin::Network;
+use sphinx_signer::sphinx_glyph::control::{Config, ControlPersist, Policy, Velocity};
 use std::sync::{mpsc, Arc, Mutex};
 use std::thread;
 use std::time::Duration;
 use std::time::SystemTime;
 
-use esp_idf_hal::peripherals::Peripherals;
-use esp_idf_svc::nvs::EspDefaultNvsPartition;
-
-use sphinx_signer::lightning_signer::bitcoin::Network;
-use sphinx_signer::sphinx_glyph::control::{Config, ControlPersist, Policy, Velocity};
-
 const ID_LEN: usize = 12;
 
 fn main() -> Result<()> {
@@ -58,7 +57,12 @@ fn main() -> Result<()> {
     let flash_per = FlashPersister::new(default_nvs.clone());
     let flash_arc = Arc::new(Mutex::new(flash_per));
     // BUTTON thread
-    button_loop(pins.gpio9, led_tx.clone(), flash_arc.clone());
+    while let Err(e) =
+        button_loop(unsafe { Gpio9::new() }, led_tx.clone(), flash_arc.clone())
+    {
+        log::error!("unable to spawn button thread: {:?}", e);
+        thread::sleep(Duration::from_millis(1000));
+    }
     let flash = flash_arc.lock().unwrap();
     if let Ok(exist) = flash.read_config() {
         let seed = flash.read_seed().expect("no seed...");

sphinx-key/src/periph/button.rs

@@ -1,5 +1,6 @@
 use crate::status::Status;
 use crate::FlashPersister;
+use anyhow::Result;
 use esp_idf_hal::gpio;
 use esp_idf_hal::gpio::*;
 use sphinx_signer::sphinx_glyph::control::ControlPersist;
@@ -17,8 +18,9 @@ pub fn button_loop(
     gpio9: gpio::Gpio9,
     tx: mpsc::Sender<Status>,
     flash_arc: Arc<Mutex<FlashPersister>>,
-) {
+) -> Result<()> {
-    thread::spawn(move || {
+    let builder = thread::Builder::new().stack_size(2500);
+    builder.spawn(move || {
         let mut button = PinDriver::input(gpio9).unwrap();
         button.set_pull(Pull::Up).unwrap();
         let mut pressed = false;
@@ -116,7 +118,8 @@ pub fn button_loop(
                 }
             }
         }
-    });
+    })?;
+    Ok(())
 }
 
 struct Machine {