1 files changed, 13 insertions, 0 deletions
diff --git a/gpio.h b/gpio.h
index a0d3271..1f66586 100644
--- a/gpio.h
+++ b/gpio.h
@@ -1,9 +1,22 @@
 #ifndef GPIO_H
 #define GPIO_H
 
+#define ENABLE_RIGHT_DISPLAY    4
+#define ENABLE_LEFT_DISPLAY     5
+
+#define GPIO_LOWBATTERY         88
+#define BUTTON_SPECIAL          89
+#define BUTTON_PREVBOOK         91
+#define BUTTON_PREVPAGE         92
+#define GPIO_SHUTDOWN           93
+#define BUTTON_NEXTPAGE         95
+#define BUTTON_NEXTCHAPTER      96
+#define BUTTON_NEXTBOOK         100
+
 int gpio_get(int port);
 void gpio_set(int port);
 void gpio_clear(int port);
 void gpio_init(void);
+void gpio_watch(int port, void (*fn)(int));
 
 #endif