Fixed support for DigitalOut(NC) instantiation

Author: Ganesh Ramachandran

targets/TARGET_TOSHIBA/TARGET_TMPM066/gpio_api.c

@@ -40,6 +40,9 @@ void gpio_init(gpio_t *obj, PinName pin)
 {
     // Store above pin mask, pin name into GPIO object
     obj->pin      = pin;
+    if (pin == (PinName)NC) {
+        return;
+    }
     obj->mask     = gpio_set(pin);
     obj->port     = (GPIO_Port) (pin >> 3);
     if ((PortName)obj->port == PortH) {

targets/TARGET_TOSHIBA/TARGET_TMPM3H6/gpio_api.c

@@ -24,6 +24,9 @@ void gpio_init(gpio_t *obj, PinName pin)
 {
     // Store above pin mask, pin name into GPIO object
     obj->pin  = pin;
+    if (pin == (PinName)NC) {
+        return;
+    }
     obj->mask = gpio_set(pin);
     obj->port = (PortName)(pin >> 3);
     TSB_CG->FSYSENA |= (1 << (obj->port));

targets/TARGET_TOSHIBA/TARGET_TMPM3HQ/gpio_api.c

@@ -24,6 +24,9 @@ void gpio_init(gpio_t *obj, PinName pin)
 {
     // Store above pin mask, pin name into GPIO object
     obj->pin  = pin;
+    if (pin == (PinName)NC) {
+        return;
+    }
     obj->mask = gpio_set(pin);
     obj->port = (PortName)(pin >> 3);
     TSB_CG->FSYSENA |= (1 << (obj->port));

targets/TARGET_TOSHIBA/TARGET_TMPM46B/gpio_api.c

@@ -37,6 +37,9 @@ void gpio_init(gpio_t *obj, PinName pin)
 {
     // Store above pin mask, pin name into GPIO object
     obj->pin      = pin;
+    if (pin == (PinName)NC) {
+        return;
+    }
     obj->mask     = gpio_set(pin);
     obj->port     = (GPIO_Port) (pin >> 3);
     CG_SetFcPeriphA((1 << obj->port), ENABLE);

targets/TARGET_TOSHIBA/TARGET_TMPM4G9/gpio_api.c

@@ -61,6 +61,9 @@ void gpio_init(gpio_t *obj, PinName pin)
 {
     // Store above pin mask, pin name into GPIO object
     obj->pin      = pin;
+    if (pin == (PinName)NC) {
+        return;
+    }
     obj->pin_num  = PIN_POS(pin);
     obj->mask     = gpio_set(pin);
     obj->port     = (PortName) PIN_PORT(pin);