From 7550fa78c8354d1551266bb15e280d4dd6cefb50 Mon Sep 17 00:00:00 2001
From: Olivier Matz <zer0@droids-corp.org>
Date: Thu, 3 Oct 2013 18:53:40 +0200
Subject: [PATCH] optimize the bypass mode

---
 main.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/main.c b/main.c
index 4ff369d..5d449de 100644
--- a/main.c
+++ b/main.c
@@ -158,6 +158,7 @@ int main(void)
 {
 	uint8_t i;
 	uint8_t t, diff;
+	uint8_t tmp;
 
 	/* LED */
 	DDRB = 0x02;
@@ -201,12 +202,18 @@ int main(void)
 			poll_spi();
 		}
 		/* bypass mode */
-		while (bypass == 1) {
+		if (bypass == 1) {
 			LED_ON();
-			PORTD = (PINC & 0x3f) << 2;
-			poll_spi();
+
+			while (bypass == 1) {
+				tmp = PINC;
+				tmp &= 0x3f;
+				tmp <<= 2;
+				PORTD = tmp;
+				poll_spi();
+			}
+			LED_OFF();
 		}
-		LED_OFF();
 	}
 
 	return 0;
-- 
2.20.1