diff --git a/src/ec/controller.rs b/src/ec/controller.rs
index d696eb2..189a0e1 100644
--- a/src/ec/controller.rs
+++ b/src/ec/controller.rs
@@ -20,7 +20,7 @@ pub trait ControllerGet<S, RV = u8>: embedded_io::ErrorType {
 
 /// Size of values to write and read from ports.
 /// System endianness is assumed.
-#[derive(Copy, Clone)]
+#[derive(Copy, Clone, Debug)]
 #[repr(u8)]
 pub enum ValueSize {
     Byte = 1, // u8
@@ -35,6 +35,7 @@ const MAX_WAIT_CHECKS: u16 = 0x07ff;
 #[cfg(not(feature = "std"))]
 const MAX_WAIT_CHECKS: u16 = 0x7fff;
 
+#[derive(Debug)]
 pub struct EmbeddedController {
     data_address: u16,
     cmd_address: u16,
@@ -96,6 +97,14 @@ impl EmbeddedController {
     pub fn set_value_size(&mut self, size: ValueSize) {
         self.rw_size = size;
     }
+
+    pub fn data(&self) -> u16 {
+        self.data_address
+    }
+
+    pub fn cmd(&self) -> u16 {
+        self.cmd_address
+    }
 }
 
 impl embedded_io::ErrorType for EmbeddedController {
diff --git a/src/ec/ports.rs b/src/ec/ports.rs
index 057f151..f10d4dd 100644
--- a/src/ec/ports.rs
+++ b/src/ec/ports.rs
@@ -5,9 +5,9 @@ mod ports_internal {
     pub(crate) fn outb(port: u16, val: u8) {
         //println!("outb port:{:#04x} value:{:#02x}", port, val);
         unsafe {
-            std::arch::asm!("out dx, al", in("dx") port, in("al") val);
-            //std::arch::asm!("outb %al, %dx", in("al") val, in("dx") port, options(att_syntax));
-            //std::arch::asm!("out dx,al", in("al") val, in("dx") port);
+            core::arch::asm!("out dx, al", in("dx") port, in("al") val);
+            //core::arch::asm!("outb %al, %dx", in("al") val, in("dx") port, options(att_syntax));
+            //core::arch::asm!("out dx,al", in("al") val, in("dx") port);
         }
         //println!("outb done");
     }
@@ -16,9 +16,9 @@ mod ports_internal {
     pub(crate) fn outw(port: u16, val: u16) {
         //println!("outw port:{:#04x} value:{:#02x}", port, val);
         unsafe {
-            std::arch::asm!("out dx, ax", in("dx") port, in("ax") val);
-            //std::arch::asm!("outb %al, %dx", in("al") val, in("dx") port, options(att_syntax));
-            //std::arch::asm!("out dx,al", in("al") val, in("dx") port);
+            core::arch::asm!("out dx, ax", in("dx") port, in("ax") val);
+            //core::arch::asm!("outb %al, %dx", in("al") val, in("dx") port, options(att_syntax));
+            //core::arch::asm!("out dx,al", in("al") val, in("dx") port);
         }
         //println!("outw done");
     }
@@ -27,9 +27,9 @@ mod ports_internal {
     pub(crate) fn outl(port: u16, val: u32) {
         //println!("outl port:{:#04x} value:{:#02x}", port, val);
         unsafe {
-            std::arch::asm!("out dx, eax", in("dx") port, in("eax") val);
-            //std::arch::asm!("outb %al, %dx", in("al") val, in("dx") port, options(att_syntax));
-            //std::arch::asm!("out dx,al", in("al") val, in("dx") port);
+            core::arch::asm!("out dx, eax", in("dx") port, in("eax") val);
+            //core::arch::asm!("outb %al, %dx", in("al") val, in("dx") port, options(att_syntax));
+            //core::arch::asm!("out dx,al", in("al") val, in("dx") port);
         }
         //println!("outl done");
     }
@@ -39,9 +39,9 @@ mod ports_internal {
         let out: u8;
         //println!("inb port:{:#04x}", port);
         unsafe {
-            std::arch::asm!("in al, dx", in("dx") port, lateout("al") out);
-            //std::arch::asm!("inb %dx, %al", in("dx") port, out("al") out, options(att_syntax));
-            //std::arch::asm!("in al,dx", in("dx") port, out("al") out);
+            core::arch::asm!("in al, dx", in("dx") port, lateout("al") out);
+            //core::arch::asm!("inb %dx, %al", in("dx") port, out("al") out, options(att_syntax));
+            //core::arch::asm!("in al,dx", in("dx") port, out("al") out);
         }
         //println!("inb port:{:#04x} -> value:{:#02x}", port, out);
         out
@@ -52,9 +52,9 @@ mod ports_internal {
         let out: u16;
         //println!("inb port:{:#04x}", port);
         unsafe {
-            std::arch::asm!("in ax, dx", in("dx") port, lateout("ax") out);
-            //std::arch::asm!("inb %dx, %al", in("dx") port, out("al") out, options(att_syntax));
-            //std::arch::asm!("in al,dx", in("dx") port, out("al") out);
+            core::arch::asm!("in ax, dx", in("dx") port, lateout("ax") out);
+            //core::arch::asm!("inb %dx, %al", in("dx") port, out("al") out, options(att_syntax));
+            //core::arch::asm!("in al,dx", in("dx") port, out("al") out);
         }
         //println!("inb port:{:#04x} -> value:{:#02x}", port, out);
         out
@@ -65,9 +65,9 @@ mod ports_internal {
         let out: u32;
         //println!("inb port:{:#04x}", port);
         unsafe {
-            std::arch::asm!("in eax, dx", in("dx") port, lateout("eax") out);
-            //std::arch::asm!("inb %dx, %al", in("dx") port, out("al") out, options(att_syntax));
-            //std::arch::asm!("in al,dx", in("dx") port, out("al") out);
+            core::arch::asm!("in eax, dx", in("dx") port, lateout("eax") out);
+            //core::arch::asm!("inb %dx, %al", in("dx") port, out("al") out, options(att_syntax));
+            //core::arch::asm!("in al,dx", in("dx") port, out("al") out);
         }
         //println!("inb port:{:#04x} -> value:{:#02x}", port, out);
         out
diff --git a/src/ec/unnamed_power/mod.rs b/src/ec/unnamed_power/mod.rs
index 45504d0..a06d034 100644
--- a/src/ec/unnamed_power/mod.rs
+++ b/src/ec/unnamed_power/mod.rs
@@ -1,7 +1,9 @@
 mod addresses;
 pub use addresses::{Setting, Charge, ChargeMode, ControlBoard, BreathingColour, StaticColour};
+#[cfg(feature = "std")]
 pub mod raw_io;
 
+#[derive(Debug)]
 pub struct UnnamedPowerEC(super::EmbeddedController);
 
 impl UnnamedPowerEC {
diff --git a/src/lib.rs b/src/lib.rs
index ee43710..537ff4d 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,5 +1,6 @@
 //! Low-level hardware interfaces for Valve's Steam Deck
 
+#![cfg_attr(not(feature = "std"), no_std)]
 #![warn(missing_docs)]
 
 pub mod ec;