eunkyoung kim / mbed-src

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Dependents:   SSD1306_smart_watch

Fork of mbed-src by eunkyoung kim

Diff: common/gpio.c

Revision:
160:6870f452afa4
Parent:
127:ce7cebc0511f
Child:
221:8276e3a4886f
diff -r 3b23f6d9ecb9 -r 6870f452afa4 common/gpio.c
--- a/common/gpio.c	Mon Apr 14 10:30:07 2014 +0100
+++ b/common/gpio.c	Mon Apr 14 11:30:06 2014 +0100
@@ -18,16 +18,20 @@
 static inline void _gpio_init_in(gpio_t* gpio, PinName pin, PinMode mode)
 {
     gpio_init(gpio, pin);    
-    gpio_dir(gpio, PIN_INPUT);
-    gpio_mode(gpio, mode);
+    if (pin != NC) {    
+        gpio_dir(gpio, PIN_INPUT);
+        gpio_mode(gpio, mode);
+    }
 }
     
 static inline void _gpio_init_out(gpio_t* gpio, PinName pin, PinMode mode, int value)
 {
     gpio_init(gpio, pin);
-    gpio_write(gpio, value);
-    gpio_dir(gpio, PIN_OUTPUT);
-    gpio_mode(gpio, mode);
+    if (pin != NC) {
+        gpio_write(gpio, value);
+        gpio_dir(gpio, PIN_OUTPUT);
+        gpio_mode(gpio, mode);
+    }
 }
 
 void gpio_init_in(gpio_t* gpio, PinName pin) {
@@ -49,7 +53,8 @@
 void gpio_init_inout(gpio_t* gpio, PinName pin, PinDirection direction, PinMode mode, int value) {
     if (direction == PIN_INPUT) {
         _gpio_init_in(gpio, pin, mode);
-        gpio_write(gpio, value); // we prepare the value in case it is switched later
+        if (pin != NC)
+            gpio_write(gpio, value); // we prepare the value in case it is switched later
     } else {
         _gpio_init_out(gpio, pin, mode, value);
     }