From 40575cafe477df2ed3779789174a13eae5da187e Mon Sep 17 00:00:00 2001
From: Josh Rahm <joshuarahm@gmail.com>
Date: Wed, 18 Dec 2024 00:30:51 -0700
Subject: Initial commit for programming an arduino in Zig.

This is a simple collatz blinker program.
---
 init.zig | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 init.zig

(limited to 'init.zig')

diff --git a/init.zig b/init.zig
new file mode 100644
index 0000000..be0bd10
--- /dev/null
+++ b/init.zig
@@ -0,0 +1,27 @@
+pub export fn _start() linksection(".vectors") callconv(.Naked) void {
+    asm volatile (
+        \\ rjmp reset    ; jump to reset
+        \\ rjmp ext_int0
+    );
+}
+
+pub export const end_of_ram: u16 = 0x8FF;
+pub export fn reset() linksection(".vectors") callconv(.Naked) void {
+    asm volatile (
+        \\ sei
+        \\ rjmp main
+    );
+    // asm volatile (
+    //     \\ ldi r16, hi8(%[ramend])
+    //     \\ sts 0x3E, r16
+    //     \\ ldi r16, lo8(%[ramend])
+    //     \\ sts 0X3D, r16
+    //     \\ sei
+    //     \\ jmp main
+    //     :
+    //     : [ramend] "i" (end_of_ram)
+    //     : "r16"
+    // );
+}
+
+pub export fn ext_int0() void {}
-- 
cgit