Nano_RP2040: export Nina pins using classic APIs

The cpp file should be moved in WiFiNINA or helper library
Please modify the "__attribute__ error" accordingly

Author: facchinm

variants/NANO_RP2040_CONNECT/nina_pins.h

@@ -0,0 +1,46 @@
+#ifndef _NINA_PINS_
+#define _NINA_PINS_
+
+/******************************************************************************
+ * INCLUDE
+ ******************************************************************************/
+
+#include "Arduino.h"
+
+/******************************************************************************
+ * PREPROCESSOR-MAGIC
+ ******************************************************************************/
+
+#if __has_include("WiFiNINA.h")
+#  define NINA_ATTRIBUTE
+#else
+#  define NINA_ATTRIBUTE __attribute__ ((error("Please include WiFiNINA.h to use this pin")))
+#endif
+
+/******************************************************************************
+ * TYPEDEF
+ ******************************************************************************/
+
+enum NinaPin {
+  LEDR = 27,
+  LEDG = 25,
+  LEDB = 26,
+  A4   = 34,
+  A5   = 39,
+  A6   = 36,
+  A7   = 35
+};
+
+/******************************************************************************
+ * FUNCTION DECLARATION
+ ******************************************************************************/
+
+void      NINA_ATTRIBUTE pinMode     (NinaPin pin, PinMode mode);
+PinStatus NINA_ATTRIBUTE digitalRead (NinaPin pin);
+void      NINA_ATTRIBUTE digitalWrite(NinaPin pin, PinStatus value);
+int       NINA_ATTRIBUTE analogRead  (NinaPin pin);
+void      NINA_ATTRIBUTE analogWrite (NinaPin pin, int value);
+
+#undef NINA_ATTRIBUTE
+
+#endif /* _NINA_PINS_ */

variants/NANO_RP2040_CONNECT/pins_arduino.h

@@ -22,9 +22,9 @@ extern PinName digitalPinToPinName(pin_size_t P);
 // ----
 #define PIN_LED     (13u)
 #define LED_BUILTIN PIN_LED
-#define LEDR        (20u)
-#define LEDG        (21u)
-#define LEDB        (13u)
+//#define LEDR        (20u)
+//#define LEDG        (21u)
+//#define LEDB        (13u)
 
 // Analog pins
 // -----------
@@ -120,4 +120,8 @@ void _ontouch1200bps_();
 
 #define USB_MAX_POWER	(500)
 
+#ifdef __cplusplus
+#include "nina_pins.h"
+#endif
+
 #endif //__PINS_ARDUINO__