From: Jan "Yenya" Kasprzak <kas@fi.muni.cz>
Date: Fri, 19 Jul 2013 16:28:20 +0000 (+0200)
Subject: buttons.c: faster brake sensor reaction time
X-Git-Url: https://www.fi.muni.cz/~kas/git//home/kas/public_html/git/?p=bike-lights.git;a=commitdiff_plain;h=b2a7818a12aab1915c19ae65af12b2f16c2f4da6

buttons.c: faster brake sensor reaction time

If the ADC reads as "brake on" for two jiffies (1/8 of second),
consider it being on. Previously the interval was too long (1/4 s).
---

diff --git a/firmware/buttons.c b/firmware/buttons.c
index c3cdc52..4f7a5ce 100644
--- a/firmware/buttons.c
+++ b/firmware/buttons.c
@@ -235,7 +235,7 @@ static void handle_brake(unsigned char cur, unsigned char prev)
 				              // --- no change ---
 	duration = jiffies - button_start[2];
 
-	if (duration <= 3)
+	if (duration == 0) // at least two jiffies
 		return;
 
 	if (cur) {