feat: better APU cycles

src/apu.rs

@@ -49,6 +49,11 @@ impl Apu {
         }
     }
 
+    pub fn clock(&mut self, cycles: u8) {
+        // @todo implement the clock and allow for the proper
+        // writing of the output buffer at a fixed frequency
+    }
+
     pub fn read(&mut self, addr: u16) -> u8 {
         match addr {
             0xff26 => 1 as u8, // todo implement this

src/cpu.rs

 use core::panic;
 
 use crate::{
+    apu::Apu,
     debugln,
     inst::{EXTENDED, INSTRUCTIONS},
     mmu::Mmu,
@@ -271,6 +272,11 @@ impl Cpu {
         self.mmu().ppu()
     }
 
+    #[inline(always)]
+    pub fn apu(&mut self) -> &mut Apu {
+        self.mmu().apu()
+    }
+
     #[inline(always)]
     pub fn pad(&mut self) -> &mut Pad {
         self.mmu().pad()

src/gb.rs

@@ -75,6 +75,7 @@ impl GameBoy {
     pub fn clock(&mut self) -> u8 {
         let cycles = self.cpu_clock();
         self.ppu_clock(cycles);
+        self.apu_clock(cycles);
         self.timer_clock(cycles);
         cycles
     }
@@ -95,6 +96,10 @@ impl GameBoy {
         self.ppu().clock(cycles)
     }
 
+    pub fn apu_clock(&mut self, cycles: u8) {
+        self.apu().clock(cycles)
+    }
+
     pub fn timer_clock(&mut self, cycles: u8) {
         self.timer().clock(cycles)
     }
@@ -248,6 +253,10 @@ impl GameBoy {
         self.cpu.ppu()
     }
 
+    pub fn apu(&mut self) -> &mut Apu {
+        self.cpu.apu()
+    }
+
     pub fn pad(&mut self) -> &mut Pad {
         self.cpu.pad()
     }

src/mmu.rs

@@ -75,6 +75,10 @@ impl Mmu {
         &mut self.ppu
     }
 
+    pub fn apu(&mut self) -> &mut Apu {
+        &mut self.apu
+    }
+
     pub fn pad(&mut self) -> &mut Pad {
         &mut self.pad
     }