From 826681214931cd53b607320a620428fb6e9d6bf1 Mon Sep 17 00:00:00 2001
From: Marti Bolivar <mbolivar@leaflabs.com>
Date: Tue, 5 Jun 2012 18:11:29 -0400
Subject: <wirish/boards.h>: Add BOARD_BUTTON_PRESSED_LEVEL.

This allows boards to override the logic level of a pressed
button. All Maple boards have a pressed button read HIGH, but if the
opposite convention is used, isButtonPressed() will infinite loop.

Make isButtonPressed() respect this setting.

Signed-off-by: Marti Bolivar <mbolivar@leaflabs.com>
---
 wirish/wirish_digital.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'wirish/wirish_digital.cpp')

diff --git a/wirish/wirish_digital.cpp b/wirish/wirish_digital.cpp
index a7f10cd..05ce756 100644
--- a/wirish/wirish_digital.cpp
+++ b/wirish/wirish_digital.cpp
@@ -65,9 +65,9 @@ void togglePin(uint8 pin) {
 #define BUTTON_DEBOUNCE_DELAY 1
 
 uint8 isButtonPressed() {
-    if (digitalRead(BOARD_BUTTON_PIN)) {
+    if (digitalRead(BOARD_BUTTON_PIN) == BOARD_BUTTON_PRESSED_LEVEL) {
         delay(BUTTON_DEBOUNCE_DELAY);
-        while (digitalRead(BOARD_BUTTON_PIN))
+        while (digitalRead(BOARD_BUTTON_PIN) == BOARD_BUTTON_PRESSED_LEVEL)
             ;
         return true;
     }
-- 
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