fix autd3-firmware-emulator by miri test

Author: s5suzuki

autd3-firmware-emulator/src/cpu/emulator.rs

@@ -141,8 +141,8 @@ impl CPUEmulator {
 }
 
 impl CPUEmulator {
-    pub(crate) const fn cast<T>(data: &[u8]) -> &T {
-        unsafe { &*(data.as_ptr() as *const T) }
+    pub(crate) const fn cast<T>(data: &[u8]) -> T {
+        unsafe { (data.as_ptr() as *const T).read_unaligned() }
     }
 
     const fn get_addr(select: u8, addr: u16) -> u16 {

autd3-firmware-emulator/src/cpu/operation/clear.rs

@@ -1,13 +1,14 @@
 use crate::{cpu::params::*, CPUEmulator};
 
+#[allow(dead_code)]
 #[repr(C, align(2))]
 struct Clear {
     tag: u8,
 }
 
 impl CPUEmulator {
-    pub(crate) unsafe fn clear(&mut self, data: &[u8]) -> u8 {
-        let _d = Self::cast::<Clear>(data);
+    pub(crate) unsafe fn clear(&mut self, _data: &[u8]) -> u8 {
+        // let _d = Self::cast::<Clear>(data);
 
         self.read_fpga_state = false;
 

autd3-firmware-emulator/src/cpu/operation/gain.rs

@@ -24,7 +24,7 @@ impl CPUEmulator {
         let data = unsafe {
             std::slice::from_raw_parts(
                 data[std::mem::size_of::<Gain>()..].as_ptr() as *const u16,
-                (data.len() - 2) >> 1,
+                self.num_transducers,
             )
         };
 

autd3-firmware-emulator/src/fpga/emulator/memory.rs

@@ -101,7 +101,7 @@ impl Memory {
     }
 
     pub fn read_bram_as<T>(bram: &[u16], addr: usize) -> T {
-        unsafe { (bram.as_ptr().add(addr) as *const T).read() }
+        unsafe { (bram.as_ptr().add(addr) as *const T).read_unaligned() }
     }
 
     pub fn write(&mut self, addr: u16, data: u16) {