add amp_en control

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);