From 46f87373bc8c28442273ee4f8da3a352223150f5 Mon Sep 17 00:00:00 2001
From: Keith Packard <keithp@keithp.com>
Date: Mon, 6 Aug 2012 22:53:52 -0700
Subject: altos: Add button driver and event queue

With this, a single task can wait for any button or quadrature input
device.

Signed-off-by: Keith Packard <keithp@keithp.com>
---
 src/core/ao.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'src/core')

diff --git a/src/core/ao.h b/src/core/ao.h
index 1032dd33..5e1fbb9d 100644
--- a/src/core/ao.h
+++ b/src/core/ao.h
@@ -125,7 +125,12 @@ ao_panic(uint8_t reason);
  * ao_timer.c
  */
 
-extern volatile __data uint16_t ao_tick_count;
+#ifndef AO_TICK_TYPE
+#define AO_TICK_TYPE	uint16_t
+#define AO_TICK_SIGNED	int16_t
+#endif
+
+extern volatile __data AO_TICK_TYPE ao_tick_count;
 
 /* Our timer runs at 100Hz */
 #define AO_HERTZ		100
-- 
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