first wavetable synth demo

ch32v-insert-coin/src/main.rs

@@ -9,6 +9,10 @@ mod insert_coin;
 // system stuff
 mod system;
 
+// synthesizer :3
+mod synthesizer;
+use synthesizer::AppSynthesizers;
+
 use ch32_hal::{adc::AdcChannel, interrupt::typelevel::Handler, timer::low_level::OutputPolarity};
 use insert_coin::{CoreConfig, InsertCoin, SimplePwmCore};
 
@@ -204,30 +208,40 @@ fn debug_main(mut p: hal::Peripherals, mut delay: Delay) -> ! {
     use hal::gpio::{Level, Output};
     let mut led0_pin = Output::new(p.PC3, Level::High, Default::default());
 
-    // button pin setup
-    let button_pin = p.PD6;
-    unsafe { system::init_gpio_irq(button_pin.pin(), button_pin.port(), false, true) };
-    let mut button_input = Input::new(button_pin, Pull::Up);
-
     delay.delay_ms(1000);
 
-    unsafe { system::enter_standby() };
-    delay.delay_ms(1000);
-    riscv::asm::wfi();
+    let tick_rate_hz = 100000; // 100khz
+    let tick_interval_us = 1000000 / tick_rate_hz;
 
-    // get the clocks re-initialized
-    let mut config = hal::Config::default();
-    config.rcc = hal::rcc::Config::SYSCLK_FREQ_48MHZ_HSI;
-    unsafe {
-        hal::rcc::init(config.rcc);
-    }
+    // DAC output setup
+    let dac_pin = PwmPin::new_ch4::<0>(p.PC4);
+    // let dac_ch = hal::timer::Channel::Ch4;
+
+    // PWM timer setup
+    let mut pwm = SimplePwm::new(
+        p.TIM1,
+        None,
+        None,
+        None,
+        Some(dac_pin),
+        Hertz::khz(200),
+        CountingMode::default(),
+    );
+
+    let pwm_core = SimplePwmCore::new(pwm);
+
+    // === synthesizer setup ===
+    let mut synthesizer = AppSynthesizers::new(tick_rate_hz, pwm_core);
+    synthesizer.square.set_freq(440);
 
     #[cfg(feature = "enable_print")]
     println!("begin loop");
 
+    led0_pin.toggle();
+
     loop {
-        led0_pin.toggle();
-        delay.delay_ms(100);
+        synthesizer.service();
+        delay.delay_us(tick_interval_us as u32);
     }
 }
 
@@ -275,6 +289,11 @@ fn app_main(mut p: hal::Peripherals, mut delay: Delay) -> ! {
 
     let core_config = CoreConfig::new(tick_rate_hz);
 
+    let pwm_core = SimplePwmCore::new(pwm);
+
+    // === synthesizer setup ===
+    // let synthesizer = AppSynthesizers::new(core_config.tick_rate_hz, pwm_core);
+
     // === input setup ===
 
     // adc
@@ -327,8 +346,6 @@ fn app_main(mut p: hal::Peripherals, mut delay: Delay) -> ! {
     let mut light_ctrl_btn_input =
         DebouncedGPIO::new(light_ctrl_btn_pin.degrade(), core_config.tick_rate_hz, 100);
 
-    let pwm_core = SimplePwmCore::new(pwm);
-
     let mut interfaces = InsertCoin::new(core_config, pwm_core);
     interfaces.set_active(true);
     // insert_coin.init();
@@ -631,8 +648,8 @@ fn main() -> ! {
     let mut delay = Delay;
     delay.delay_ms(1000);
 
-    // debug_main(p, delay);
-    app_main(p, delay);
+    debug_main(p, delay);
+    // app_main(p, delay);
 }
 
 #[panic_handler]