From 40438d709a5f84dd838ab8749b3389b3ca2a682f Mon Sep 17 00:00:00 2001
From: Thomas Ingleby <thomas.c.ingleby@intel.com>
Date: Fri, 11 Apr 2014 17:57:53 +0100
Subject: [PATCH 1/2] gpio: Add cpp example to use IO.

* Patch direction setting

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
---
 examples/blink-io8.cpp | 20 ++++++++++++++++++++
 src/gpio/gpio.c        | 17 +++++++++--------
 2 files changed, 29 insertions(+), 8 deletions(-)
 create mode 100644 examples/blink-io8.cpp

diff --git a/examples/blink-io8.cpp b/examples/blink-io8.cpp
new file mode 100644
index 0000000..5eeae17
--- /dev/null
+++ b/examples/blink-io8.cpp
@@ -0,0 +1,20 @@
+#include "stdio.h"
+
+#include "maa.h"
+
+int
+main(int argc, char **argv)
+{
+    fprintf(stdout, "MAA Version: %d\n Starting Blinking on IO8", get_version());
+    gpio_t gpio;
+    gpio_init(&gpio, 26);
+    gpio_dir(&gpio, "out");
+
+    while(1){
+        gpio_write(&gpio, 0);
+        sleep(1);
+        gpio_write(&gpio, 1);
+        sleep(1);
+    }
+    return 0;
+}
diff --git a/src/gpio/gpio.c b/src/gpio/gpio.c
index 4726ee7..73bfeb6 100644
--- a/src/gpio/gpio.c
+++ b/src/gpio/gpio.c
@@ -63,19 +63,20 @@ gpio_mode(gpio_t *gpio, gpio_mode_t mode) {
 
 void
 gpio_dir(gpio_t *gpio, gpio_dir_t dir) {
-    fclose(gpio->value_fp);
-    gpio->value_fp = NULL;
+//if(gpio->value_fp != NULL) {
+//      fclose(gpio->value_fp);
+//       gpio->value_fp = NULL;
+//   }
     char filepath[64];
     snprintf(filepath, 64, "/sys/class/gpio/gpio%d/direction", gpio->pin);
-    int fd;
 
-    fd = open(filepath, O_WRONLY);
-    if(fd == -1) {
+    FILE *direction;
+    if((direction = fopen(filepath, "w")) == NULL) {
         fprintf(stderr, "Failed to open direction for writing!\n");
-    } else if(write(fd, dir, 5) == -1) {
-        fprintf(stderr, "Failed to set direction\n");
     } else {
-        close(fd);
+        fprintf(direction, dir);
+        fclose(direction);
+        gpio->value_fp = NULL;
     }
 }
 

From 791c4b4d71d9639631e46d1fba0f0f5aaeca110b Mon Sep 17 00:00:00 2001
From: Thomas Ingleby <thomas.c.ingleby@intel.com>
Date: Mon, 14 Apr 2014 17:13:31 +0100
Subject: [PATCH 2/2] gpio: Tempory fix when changing direction

* Added unexport feature

Signed-off-by: Thomas Ingleby <thomas.c.ingleby@intel.com>
---
 src/gpio/gpio.c | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/src/gpio/gpio.c b/src/gpio/gpio.c
index 73bfeb6..1538956 100644
--- a/src/gpio/gpio.c
+++ b/src/gpio/gpio.c
@@ -63,10 +63,9 @@ gpio_mode(gpio_t *gpio, gpio_mode_t mode) {
 
 void
 gpio_dir(gpio_t *gpio, gpio_dir_t dir) {
-//if(gpio->value_fp != NULL) {
-//      fclose(gpio->value_fp);
-//       gpio->value_fp = NULL;
-//   }
+    if(gpio->value_fp != NULL) {
+         gpio->value_fp = NULL;
+    }
     char filepath[64];
     snprintf(filepath, 64, "/sys/class/gpio/gpio%d/direction", gpio->pin);
 
@@ -105,7 +104,14 @@ gpio_write(gpio_t *gpio, int value) {
 
 void
 gpio_close(gpio_t *gpio) {
+    FILE *unexport_f;
 
+    if((unexport_f = fopen("/sys/class/gpio/unexport", "w")) == NULL) {
+        fprintf(stderr, "Failed to open unexport for writing!\n");
+    } else {
+        fprintf(unexport_f, "%d", gpio->pin);
+        fclose(unexport_f);
+    }
 }
 
 int