1 files changed, 33 insertions, 0 deletions
diff --git a/02-usart/include/core/irq.h b/02-usart/include/core/irq.h
new file mode 100644
index 0000000..ae1126d
--- /dev/null
+++ b/02-usart/include/core/irq.h
@@ -0,0 +1,33 @@
+#ifndef CORE_IRQ_H__
+#define CORE_IRQ_H__
+
+#include <stdint.h>
+
+/*
+ * Include file for interrupt service routines.
+ */
+
+typedef enum {
+#define IRQ_RESERVED(n)
+#define IRQ(name_, uname, num) \
+  IRQ_##uname = num,
+#include "core/isrs.inc"
+#undef IRQ
+#undef IRQ_RESERVED
+} interrupt_t;
+
+/*
+ * The interrupt service routines. These link in the function `main` as the
+ * main function.
+ */
+extern const void* vectors[];
+
+/*
+ * Defines an error state. This loops forever and defines a distinct flashing
+ * pattern to let the user know an unhandled ISR happened.
+ */
+void unhandled_isr(uint8_t val);
+
+void isr_simple_pin_on();
+
+#endif /* CORE_IRQ_H_ */