interrupt driver

1 files changed, 8 insertions, 4 deletions

diff --git a/src/main.zig b/src/main.zig
index 3891e52..8857583 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,5 +1,6 @@
 const cpu = @import("cpu.zig");
 const gpio = @import("gpio.zig");
+const interrupt = @import("interrupt.zig");
 
 const rcc: *[39]u32 = @ptrFromInt(0x40021000);
 const gpioa = gpio.gpioa;
@@ -7,18 +8,21 @@ const gpioc = gpio.gpioc;
 
 export fn _start() callconv(.C) noreturn {
     cpu.interrupt_disable();
+    interrupt.initialize();
+    interrupt.register(.SVCall, svcall);
+    cpu.interrupt_enable();
 
     rcc[19] |= 5; // gpio a and c
     gpioa.set_mode(5, .output);
     gpioc.set_mode(13, .input);
 
     while (true) {
-        const state = gpioc.read(13);
-        gpioa.write(5, state);
+        asm volatile("svc 0");
     }
 }
 
-export fn fault_handler() callconv(.C) void {
-    while (true) {}
+fn svcall() void {
+    const state = gpioc.read(13);
+    gpioa.write(5, state);
 }