commit 32e74e2e6cae4105e90b03a7fce51b8645d287f4
author Norman James <nkskjames@gmail.com> Tue Sep 15 21:28:06 2015 -0500
committer Norman James <nkskjames@gmail.com> Tue Sep 15 21:28:06 2015 -0500
tree 00a3b7bcf923a4c9038e5d93aecbce53e2d60277
parent 1e25d1d055fdcb4f0c14a6363c3e0c4fa2103467

added some error handling

includes/gpio.h

diff --git a/includes/gpio.h b/includes/gpio.h
index 68d01bd..54d912d 100644
--- a/includes/gpio.h
+++ b/includes/gpio.h
@@ -14,12 +14,20 @@
 
 
 //gpio functions
-void gpio_init(GDBusConnection*, GPIO*);
+#define GPIO_OK 0
+#define GPIO_ERROR -1
+#define GPIO_OPEN_ERROR -2
+#define GPIO_INIT_ERROR -3
+#define GPIO_READ_ERROR -4
+#define GPIO_WRITE_ERROR -5
+#define GPIO_LOOKUP_ERROR -6
+
+int gpio_init(GDBusConnection*, GPIO*);
 void gpio_close(GPIO*);
 int  gpio_open(GPIO*);
-void gpio_write(GPIO*, uint8_t);
-void gpio_writec(GPIO*, char);
-void gpio_clock_cycle(GPIO*, int);
-uint8_t gpio_read(GPIO*);
+int gpio_write(GPIO*, uint8_t);
+int gpio_writec(GPIO*, char);
+int gpio_clock_cycle(GPIO*, int);
+int gpio_read(GPIO*,uint8_t*);
 
 #endif