From 1f8f4e05410df148b7f3c3fd35f85c9b37d0401f Mon Sep 17 00:00:00 2001
From: Dario Bartussek <d.bartussek@gmail.com>
Date: Mon, 19 Apr 2021 13:50:42 +0200
Subject: Simple hello world program using libctru

---
 src/lib.rs | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 src/lib.rs

(limited to 'src/lib.rs')

diff --git a/src/lib.rs b/src/lib.rs
new file mode 100644
index 0000000..1970dfd
--- /dev/null
+++ b/src/lib.rs
@@ -0,0 +1,46 @@
+#![no_std]
+
+use core::{panic::PanicInfo, ptr::null_mut};
+use libctru::raw::{
+    aptMainLoop, c_char, c_int, consoleInit, gfxExit, gfxFlushBuffers, gfxInitDefault,
+    gfxScreen_t_GFX_TOP, gfxSwapBuffers, gspWaitForEvent, hidKeysDown, hidScanInput,
+    GSPGPU_Event_GSPGPU_EVENT_VBlank0, KEY_START,
+};
+
+extern "C" {
+    fn puts(string: *const c_char);
+}
+
+#[no_mangle]
+pub extern "C" fn main(_argc: c_int, _argv: *const *const c_char) -> c_int {
+    unsafe {
+        gfxInitDefault();
+
+        consoleInit(gfxScreen_t_GFX_TOP, null_mut());
+
+        puts("Hello World from Rust".as_ptr());
+
+        while aptMainLoop() {
+            hidScanInput();
+            let keys = hidKeysDown();
+
+            if keys & (KEY_START as u32) != 0 {
+                break;
+            }
+
+            gfxFlushBuffers();
+            gfxSwapBuffers();
+
+            gspWaitForEvent(GSPGPU_Event_GSPGPU_EVENT_VBlank0, true);
+        }
+
+        gfxExit();
+    }
+
+    0
+}
+
+#[panic_handler]
+fn panic(_info: &PanicInfo) -> ! {
+    loop {}
+}
-- 
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