Simple hello world program using libctru2.5_libctru

1 files changed, 46 insertions, 0 deletions

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 {}
+}