1 files changed, 30 insertions, 0 deletions
diff --git a/02-usart/include/common.h b/02-usart/include/common.h
new file mode 100644
index 0000000..9d5c7cd
--- /dev/null
+++ b/02-usart/include/common.h
@@ -0,0 +1,30 @@
+#ifndef COMMON__H
+#define COMMON__H
+
+#include <stdint.h>
+
+/* Define __IO to be volatile if it's not already. */
+#ifndef __IO
+#define __IO volatile
+#endif
+
+#define bool int
+#ifndef __cplusplus
+#define true 1
+#define false 0
+#endif
+
+#define PACKED __attribute__((packed))
+#define BIT(n) (1 << (n))
+
+#define RESERVED_CONCAT_IMPL(x, y) x ## y
+#define RESERVED_MACRO_CONCAT(x, y) RESERVED_CONCAT_IMPL(x, y)
+#define RESERVED(n) \
+  bits_t RESERVED_MACRO_CONCAT(_r, __COUNTER__) :n
+  
+#define RESERVE(type) \
+  __IO type RESERVED_MACRO_CONCAT(_r, __COUNTER__)
+
+typedef uint32_t bits_t;
+
+#endif /* COMMON_H */