From 8104fbbad0fd4e52ee9d00f23e2065a4b2450e9f Mon Sep 17 00:00:00 2001
From: Rihards Skuja <rssk@protonmail.com>
Date: Tue, 2 Jan 2018 14:46:33 +0200
Subject: [PATCH] Fix return value signedness

---
 include/sonar.h | 2 +-
 src/sonar.c     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/sonar.h b/include/sonar.h
index 03a1199..ff2a32f 100644
--- a/include/sonar.h
+++ b/include/sonar.h
@@ -40,6 +40,6 @@
 
 void init_sonar(void);
 void trigger_sonar(void);
-unsigned int read_sonar(void);
+int read_sonar(void);
 
 #endif /* SONAR_H */
diff --git a/src/sonar.c b/src/sonar.c
index 4f15e14..fb780ce 100644
--- a/src/sonar.c
+++ b/src/sonar.c
@@ -28,7 +28,7 @@ ISR(TIMER1_OVF_vect)
     TCNT1 = 0;
 }
 
-unsigned int read_sonar()
+int read_sonar()
 {
     int dist_in_cm = 0;
     init_sonar();