1 files changed, 5 insertions, 2 deletions
diff --git a/src/main.zig b/src/main.zig
index 8ca6ada..3891e52 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -3,15 +3,18 @@ const gpio = @import("gpio.zig");
 
 const rcc: *[39]u32 = @ptrFromInt(0x40021000);
 const gpioa = gpio.gpioa;
+const gpioc = gpio.gpioc;
 
 export fn _start() callconv(.C) noreturn {
     cpu.interrupt_disable();
 
-    rcc[19] |= 1; // gpioaen
+    rcc[19] |= 5; // gpio a and c
     gpioa.set_mode(5, .output);
+    gpioc.set_mode(13, .input);
 
     while (true) {
-        gpioa.toggle(5);
+        const state = gpioc.read(13);
+        gpioa.write(5, state);
     }
 }