diff --git a/bsp_linux/main.c b/bsp_linux/main.c
index f56f989..2d8ba34 100644
--- a/bsp_linux/main.c
+++ b/bsp_linux/main.c
@@ -6,6 +6,10 @@
 
 void mission(void);
 
+int get_descriptor_rw() {
+  return 1;
+}
+
 void done() {
   printf("done.\n");
   exit(0);
@@ -18,9 +22,6 @@ void rust_eh_personality() {
 }
 
 int main(void) {
-    printf("std %i sterr %i\n", stdout, stderr);
-    const char * buffer ="123";
-    write(STDOUT_FILENO, buffer, 3);
     mission();
     return 0;
 }
\ No newline at end of file
diff --git a/mission_rust/Cargo.lock b/mission_rust/Cargo.lock
index c0a15a2..3d7ef28 100644
--- a/mission_rust/Cargo.lock
+++ b/mission_rust/Cargo.lock
@@ -2,6 +2,40 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "descriptor_procmac"
+version = "0.1.0"
+dependencies = [
+ "quote",
+]
+
 [[package]]
 name = "mission_rust"
 version = "0.1.0"
+dependencies = [
+ "descriptor_procmac",
+]
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.86"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5e719e8df665df0d1c8fbfd238015744736151d4445ec0836b8e628aae103b77"
+dependencies = [
+ "unicode-ident",
+]
+
+[[package]]
+name = "quote"
+version = "1.0.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fa76aaf39101c457836aec0ce2316dbdc3ab723cdda1c6bd4e6ad4208acaca7"
+dependencies = [
+ "proc-macro2",
+]
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
diff --git a/mission_rust/Cargo.toml b/mission_rust/Cargo.toml
index d39fbfe..8dc6e3d 100644
--- a/mission_rust/Cargo.toml
+++ b/mission_rust/Cargo.toml
@@ -12,6 +12,5 @@ panic = 'abort'
 [profile.release]
 panic = 'abort'
 
-# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
-
 [dependencies]
+descriptor_procmac = { path = "./descriptor_procmac" }
\ No newline at end of file
diff --git a/mission_rust/descriptor_procmac/Cargo.toml b/mission_rust/descriptor_procmac/Cargo.toml
new file mode 100644
index 0000000..24704c8
--- /dev/null
+++ b/mission_rust/descriptor_procmac/Cargo.toml
@@ -0,0 +1,10 @@
+[package]
+name = "descriptor_procmac"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+proc-macro = true
+
+[dependencies]
+quote = "1.0"
\ No newline at end of file
diff --git a/mission_rust/descriptor_procmac/src/lib.rs b/mission_rust/descriptor_procmac/src/lib.rs
new file mode 100644
index 0000000..b04c0b5
--- /dev/null
+++ b/mission_rust/descriptor_procmac/src/lib.rs
@@ -0,0 +1,41 @@
+#![crate_type = "proc-macro"]
+extern crate proc_macro;
+use proc_macro::TokenStream;
+
+#[proc_macro]
+pub fn Device_Descriptor(input: TokenStream) -> TokenStream {
+    let first_token = input.into_iter().next().unwrap(); // Do proper error handling!
+    let raw_string = first_token.to_string();
+    let raw_string_len = raw_string.len();
+    let identifier = &first_token.to_string()[1..raw_string_len-1];
+    println!("first: {}", identifier);
+    // let value = match first_token {
+    //     Literal { symbol, kind: Str, ..} => {println!("yes: {}", symbol); "12"},
+    //     _ => "13",
+    // };
+    // let string_value = match litrs::StringLit::try_from(first_token) {
+    //     Ok(string_lit) => string_lit,
+    //     Err(e) => return e.to_compile_error(),
+    // };
+    let getter_name = quote::format_ident!("get_descriptor_{}", identifier);
+    let struct_name = quote::format_ident!("Descriptor_{}", identifier);
+    let tokens = quote::quote!(
+        extern "C" {
+            pub fn #getter_name() -> core::ffi::c_int;
+            pub fn write(fd: core::ffi::c_int, buffer: *const core::ffi::c_void, count: usize) -> core::ffi::c_int;
+        }
+
+        struct #struct_name {}
+
+        impl Hardware_Write for #struct_name {
+            fn write(&mut self, buf: &[u8]) -> Result<core::ffi::c_int,()>{
+                unsafe {
+                    let fd = #getter_name( );
+                    let written = write(fd, buf.as_ptr() as *const core::ffi::c_void, buf.len());
+                    Ok(written)
+                }
+            }
+        }
+    );
+    tokens.into()
+}
diff --git a/mission_rust/src/lib.rs b/mission_rust/src/lib.rs
index 6ce067a..ee59741 100644
--- a/mission_rust/src/lib.rs
+++ b/mission_rust/src/lib.rs
@@ -11,6 +11,14 @@ use core::panic::PanicInfo;
 use fsrc::objectmanager::SystemObjectIF;
 use fsrc::*;
 
+use descriptor_procmac::Device_Descriptor;
+
+trait Hardware_Write {
+    fn write(&mut self, buf: &[u8]) -> Result<core::ffi::c_int,()>;
+}
+
+Device_Descriptor!("rw");
+
 extern "C" {
     fn done();
 }
@@ -70,6 +78,9 @@ extern "C" fn rust_alloc_failed(){
 #[no_mangle]
 extern "C" fn rust_main() {
     sifln!("Rust startup 🚀");
+    let mut rw = Descriptor_rw{};
+    let data: &[u8] = &[0x30,0x31,10];
+    _ = rw.write(data);
     mission();
     sifln!("Mission done");
 }