Adds a pin function to get PinName from PinMap

Signed-off-by: fpr <[email protected]>

Author: fpr

Diff for: cores/arduino/stm32/pinmap.c

@@ -82,3 +82,11 @@ void* pinmap_merge_peripheral(void* a, void* b) {
     // error("pinmap mis-match");
     return NP;
 }
+
+PinName pin_pinName(const PinMap* map) {
+  if(map->pin != (PinName)NC) {
+    return map->pin;
+  } else {
+    return (PinName)NC;
+  }
+}

Diff for: cores/arduino/stm32/pinmap.h

@@ -39,6 +39,8 @@ typedef struct {
 bool pin_in_pinmap(PinName pin, const PinMap* map);
 void pin_function(PinName pin, int function);
 
+PinName pin_pinName(const PinMap* map);
+
 void* pinmap_peripheral(PinName pin, const PinMap* map);
 uint32_t pinmap_function(PinName pin, const PinMap* map);
 void* pinmap_find_peripheral(PinName pin, const PinMap* map);