From 8ea4b4401ec0fa99ac88b15e83cdefedead9d8b7 Mon Sep 17 00:00:00 2001
From: sigil-03 <sigil@glyphs.tech>
Date: Fri, 14 Nov 2025 13:30:01 -0700
Subject: [PATCH] add amp_en control

---
 ch32v-insert-coin/src/app.rs  |  6 ++++++
 ch32v-insert-coin/src/main.rs | 29 +++++++++++++++++++++++++++--
 2 files changed, 33 insertions(+), 2 deletions(-)

diff --git a/ch32v-insert-coin/src/app.rs b/ch32v-insert-coin/src/app.rs
index f2e46c0..2eb5de9 100644
--- a/ch32v-insert-coin/src/app.rs
+++ b/ch32v-insert-coin/src/app.rs
@@ -309,6 +309,7 @@ pub struct Sequences {
 pub struct Interfaces {
     pub pwm_core: SimplePwmCore<'static, ch32_hal::peripherals::TIM1>,
     pub adc_core: crate::AdcCore,
+    pub amp: crate::Amplifier,
 }
 
 pub struct App {
@@ -502,10 +503,14 @@ impl App {
             } else {
                 self.services.sequencer.disable();
                 self.services.synth0.disable();
+                self.interfaces.amp.disable();
             }
         }
 
         if self.services.synth0.need_service() {
+            if !self.interfaces.amp.enabled() {
+                self.interfaces.amp.enable();
+            }
             let out = match self.services.synth0.service() {
                 Some(value) => value / 6 / self.settings.volume.as_volume_divisor(),
                 None => 0,
@@ -540,6 +545,7 @@ impl App {
         self.interfaces
             .pwm_core
             .disable(ch32_hal::timer::Channel::Ch4);
+        self.interfaces.amp.disable();
     }
     pub fn volume_button(&mut self) {
         self.settings.volume.next();
diff --git a/ch32v-insert-coin/src/main.rs b/ch32v-insert-coin/src/main.rs
index b46f114..6a29a7a 100644
--- a/ch32v-insert-coin/src/main.rs
+++ b/ch32v-insert-coin/src/main.rs
@@ -44,6 +44,27 @@ use crate::app::sequencer::{DynamicSequence, SequenceEntry};
 
 static LED0_SEQ: [u8; 8] = [0u8, 25u8, 50u8, 75u8, 100u8, 75u8, 50u8, 25u8];
 
+pub struct Amplifier {
+    amp_en: Output<'static>,
+}
+
+impl Amplifier {
+    pub fn new(amp_en: Output<'static>) -> Self {
+        let mut amp = Self { amp_en };
+        amp.disable();
+        amp
+    }
+    pub fn enable(&mut self) {
+        self.amp_en.set_low();
+    }
+    pub fn disable(&mut self) {
+        self.amp_en.set_high();
+    }
+    pub fn enabled(&self) -> bool {
+        !self.amp_en.is_set_high()
+    }
+}
+
 use hal::adc::Adc;
 use hal::peripherals::{ADC1, PD4};
 
@@ -271,7 +292,7 @@ fn app_main(mut p: hal::Peripherals) -> ! {
     let extra_io_2 = p.PD3;
 
     let mut amp_en_output = Output::new(amp_en, Level::Low, Default::default());
-    amp_en_output.set_low();
+    let amp = Amplifier::new(amp_en_output);
 
     // set up interrupts
     unsafe { system::init_gpio_irq(sense_coin_pin.pin(), sense_coin_pin.port(), true, false) };
@@ -335,7 +356,11 @@ fn app_main(mut p: hal::Peripherals) -> ! {
         audio: &SEQUENCE_LIST,
     };
 
-    let app_interfaces = Interfaces { pwm_core, adc_core };
+    let app_interfaces = Interfaces {
+        pwm_core,
+        adc_core,
+        amp,
+    };
 
     let mut app = App::new(app_config, app_services, app_sequences, app_interfaces);