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-rw-r--r--src/kernel/ao.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/src/kernel/ao.h b/src/kernel/ao.h
index 0a3981d7..204eaae7 100644
--- a/src/kernel/ao.h
+++ b/src/kernel/ao.h
@@ -26,6 +26,15 @@
#include <ao_pins.h>
#include <ao_arch.h>
+/* replace stdio macros with direct calls to our functions */
+#undef putchar
+#undef getchar
+#define putchar(c) ao_putchar(c)
+#define getchar ao_getchar
+
+extern int ao_putchar(char c);
+extern char ao_getchar(void);
+
#define TRUE 1
#define FALSE 0