Added new GPIO HAL function gpio_is_connected() used to check if gpio_t is connected or initialized with NC

Simple gpio_t structure in TARGET_KPSDK_MCUS field name changed to allign to other HALs

Author: PrzemekWirkus

libraries/mbed/hal/gpio_api.h

@@ -28,6 +28,13 @@ extern "C" {
  **/
 uint32_t gpio_set(PinName pin);
 
+/* Checks if gpio object is connected (pin was not initialized with NC)
+ * @param pin The pin to be set as GPIO
+ * @return Non zero value if port is connected to pin
+ *         0 if port is initialized with NC
+ **/
+int gpio_is_connected(const gpio_t *obj);
+
 /* GPIO object */
 void gpio_init(gpio_t *obj, PinName pin);
 

libraries/mbed/targets/hal/TARGET_Freescale/TARGET_KPSDK_MCUS/gpio_object.h

@@ -25,27 +25,31 @@ extern "C" {
 #endif
 
 typedef struct {
-    PinName pinName;
+    PinName pin;
 } gpio_t;
 
 static inline void gpio_write(gpio_t *obj, int value) {
-    MBED_ASSERT(obj->pinName != (PinName)NC);
-    uint32_t port = obj->pinName >> GPIO_PORT_SHIFT;
-    uint32_t pin = obj->pinName & 0xFF;
+    MBED_ASSERT(obj->pin != (PinName)NC);
+    uint32_t port = obj->pin >> GPIO_PORT_SHIFT;
+    uint32_t pin = obj->pin & 0xFF;
     uint32_t gpio_addrs[] = GPIO_BASE_ADDRS;
 
     GPIO_HAL_WritePinOutput(gpio_addrs[port], pin, value);
 }
 
 static inline int gpio_read(gpio_t *obj) {
-    MBED_ASSERT(obj->pinName != (PinName)NC);
-    uint32_t port = obj->pinName >> GPIO_PORT_SHIFT;
-    uint32_t pin = obj->pinName & 0xFF;
+    MBED_ASSERT(obj->pin != (PinName)NC);
+    uint32_t port = obj->pin >> GPIO_PORT_SHIFT;
+    uint32_t pin = obj->pin & 0xFF;
     uint32_t gpio_addrs[] = GPIO_BASE_ADDRS;
 
     return (int)GPIO_HAL_ReadPinInput(gpio_addrs[port], pin);
 }
 
+static inline int gpio_is_connected(const gpio_t *obj) {
+    return obj->pin != (PinName)NC;
+}
+
 #ifdef __cplusplus
 }
 #endif