Add example peripherals

.gitignore

@@ -1,2 +1,5 @@
-/target
+target
 /.vscode
+*.dll
+*.so
+*.dylib

examples/c-peripheral/peripheral.c

@@ -0,0 +1,23 @@
+#include "peripheral.h"
+#include<stdio.h>
+#include <stdint.h>
+
+uint8_t STATE = 0x00;
+
+__declspec(dllexport) void init(void) {
+    printf("C init\n");
+}
+
+__declspec(dllexport) uint8_t read(void) {
+    printf("C read\n");
+    return STATE;
+}
+
+__declspec(dllexport) void write(uint8_t data) {
+    printf("C write\n");
+    STATE = data;
+}
+
+__declspec(dllexport) const char* name(void) {
+    return "C Example";
+}

examples/c-peripheral/peripheral.h

@@ -0,0 +1,6 @@
+#include <stdint.h>
+
+__declspec(dllexport) void init(void);
+__declspec(dllexport) uint8_t read(void);
+__declspec(dllexport) void write(uint8_t data);
+__declspec(dllexport) const char* name(void);

examples/rust-peripheral/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "example-peripheral"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+name = "rust_peripheral"
+crate-type = ["rlib", "cdylib"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+byte-strings = "0.3.1"

examples/rust-peripheral/src/lib.rs

@@ -0,0 +1,29 @@
+use byte_strings::c_str;
+
+static mut STATE: u8 = 0x00;
+
+// Will be called on library load
+#[no_mangle]
+pub extern "C" fn init() {
+    println!("Rust init");
+}
+
+// Will be called whenever the attached port is read from.
+#[no_mangle]
+pub unsafe extern "C" fn read() -> u8 {
+    println!("Rust read");
+    STATE
+}
+
+// Will be called whenever the attached port is written to.
+#[no_mangle]
+pub unsafe extern "C" fn write(data: u8) {
+    println!("Rust example write");
+    STATE = data;
+}
+
+// Will be called whenever the attached port is written to.
+#[no_mangle]
+pub extern "C" fn name() -> *const i8 {
+    c_str!("Rust Example").as_ptr()
+}