add initial ADC shutdown code

ch32v-insert-coin/src/app.rs

@@ -183,7 +183,7 @@ use crate::synthesizer::SynthesizerService;
 
 pub use settings::Settings;
 
-#[cfg(feature = "enable_print")]
+// #[cfg(feature = "enable_print")]
 use ch32_hal::println;
 
 pub struct TimerConfig {
@@ -390,8 +390,15 @@ impl App {
         if self.timers.batt_adc_timer.need_service() {
             self.timers.batt_adc_timer.service();
             let bv = self.interfaces.adc_core.get_battery_voltage();
-            #[cfg(feature = "enable_print")]
-            println!("batt adc service: {bv}");
+            let avg = self.interfaces.adc_core.get_average();
+            // #[cfg(feature = "enable_print")]
+            // println!("batt adc service: {bv}, {avg}");
+            if avg < 421 {
+                // self.services
+                // .sequencer
+                // .play_sequence(&crate::sequences::COIN_CHIRP, 0);
+                self.set_state(State::DeepSleep);
+            }
 
             // TODO:
             // do stuff if the battery voltage is below some threshold

ch32v-insert-coin/src/main.rs

@@ -50,21 +50,41 @@ use hal::peripherals::{ADC1, PD4};
 pub struct AdcCore {
     adc: Adc<'static, ADC1>,
     battery_pin: PD4,
+    batt_values: [u16; 10],
+    index: usize,
 }
 
 impl AdcCore {
     pub fn new(mut adc: Adc<'static, ADC1>, pin: PD4) -> Self {
+        riscv::asm::delay(20_000);
         adc.calibrate();
         Self {
             adc,
             battery_pin: pin,
+            batt_values: [1024; 10],
+            index: 0,
         }
     }
 
     // TODO make this a float or something
     pub fn get_battery_voltage(&mut self) -> u16 {
-        self.adc
-            .convert(&mut self.battery_pin, hal::adc::SampleTime::CYCLES241)
+        let val = self
+            .adc
+            .convert(&mut self.battery_pin, hal::adc::SampleTime::CYCLES241);
+        self.batt_values[self.index] = val;
+        self.index += 1;
+        if self.index > &self.batt_values.len() - 1 {
+            self.index = 0;
+        }
+        val
+    }
+
+    pub fn get_average(&self) -> u16 {
+        let mut sum = 0;
+        for value in &self.batt_values {
+            sum += value;
+        }
+        sum / self.batt_values.len() as u16
     }
 }
 
@@ -272,7 +292,7 @@ fn app_main(mut p: hal::Peripherals) -> ! {
     let timer_config = TimerConfig {
         sp_timer_ms: 1000,
         lp_timer_ms: 3000,
-        batt_adc_timer_ms: 10000,
+        batt_adc_timer_ms: 1000,
         usb_adc_timer_ms: 10000,
         led0_timer_ms: 100,
         led1_timer_ms: 100,
@@ -289,11 +309,11 @@ fn app_main(mut p: hal::Peripherals) -> ! {
     let dac_tick_per_service = tick_rate_hz / dac_sample_rate_hz;
     let dac_service_data = TickServiceData::new(dac_tick_per_service);
 
-    let coin_sound = include_bytes!("../audio/coin5.raw");
+    // let coin_sound = include_bytes!("../audio/coin5.raw");
     // let coin_sound = include_bytes!("../audio/coin2.raw");
 
     let sample_player = DacService::new(ch32_hal::timer::Channel::Ch4, dac_service_data);
-    sample_player.load_data(coin_sound);
+    // sample_player.load_data(coin_sound);
 
     let sequencer = app::sequencer::DynamicSequence::new(&SEQUENCE_LIST[0].0, tick_rate_hz);