From 6708da2661d693f855b6f56d69af1e2fb8502463 Mon Sep 17 00:00:00 2001
From: Lars-Dominik Braun <lars@6xq.net>
Date: Tue, 23 Sep 2014 17:24:57 +0200
Subject: Add wakeup source mechanism

Should reduce amount of cpu wakeups with expensive computations.
---
 i2c.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'i2c.c')

diff --git a/i2c.c b/i2c.c
index 00dee14..a94b3a0 100644
--- a/i2c.c
+++ b/i2c.c
@@ -255,5 +255,8 @@ ISR(TWI_vect) {
 			assert (0 && "nope\n");
 			break;
 	}
+	if (twr.status == TWST_ERR || twr.status == TWST_OK) {
+		enableWakeup (WAKE_I2C);
+	}
 }
 
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