From 085cd48e3da72626b16155a8347380c26074f2be Mon Sep 17 00:00:00 2001
From: Hauke Petersen <hauke.petersen@fu-berlin.de>
Date: Wed, 17 Feb 2016 10:27:10 +0100
Subject: [PATCH] drivers/gpio: changed default type to unsigned
---
drivers/include/periph/gpio.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/include/periph/gpio.h b/drivers/include/periph/gpio.h
index 6a7b549e6a..c91dda1f64 100644
--- a/drivers/include/periph/gpio.h
+++ b/drivers/include/periph/gpio.h
@@ -53,6 +53,8 @@
#ifndef GPIO_H
#define GPIO_H
+#include <limits.h>
+
#include "periph_cpu.h"
#include "periph_conf.h"
/* TODO: remove once all platforms are ported to this interface */
@@ -73,14 +75,14 @@ extern "C" {
* @brief Define global value for GPIO not defined
*/
#ifndef GPIO_UNDEF
-#define GPIO_UNDEF (-1)
+#define GPIO_UNDEF (UINT_MAX)
#endif
/**
* @brief Define the default GPIO type identifier
*/
#ifndef HAVE_GPIO_T
-typedef int gpio_t;
+typedef unsigned int gpio_t;
#endif
/**
--
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