altos: Allow buttons to be high when pressed rather than low

Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/src/drivers/ao_button.c b/src/drivers/ao_button.c
index 725ac45a762334a6bdbf5a303d1bb028200081e6..07e92c670f3a1c590aed332b875d3f8fc66e46b3 100644 (file)
--- a/src/drivers/ao_button.c
+++ b/src/drivers/ao_button.c
@@ -39,8 +39,16 @@ static struct ao_button_state        ao_button_state[AO_BUTTON_COUNT];
 #define bit(q) AO_BUTTON_ ## q
 #define pin(q) AO_BUTTON_ ## q ## _PIN
 
+#ifndef AO_BUTTON_INVERTED
+#define AO_BUTTON_INVERTED     1
+#endif
+
+#if AO_BUTTON_INVERTED
 /* pins are inverted */
 #define ao_button_value(b)     !ao_gpio_get(port(b), bit(b), pin(b))
+#else
+#define ao_button_value(b)     ao_gpio_get(port(b), bit(b), pin(b))
+#endif
 
 static uint8_t
 _ao_button_get(uint8_t b)