Extend GPIO mode

Fix #275

Signed-off-by: Frederic.Pillon <[email protected]>

Author: fpistm

Diff for: cores/arduino/wiring_constants.h

@@ -41,13 +41,15 @@ using std::max;
 
 #endif // __cplusplus
 
-#define HIGH 0x1
-#define LOW  0x0
-
-#define INPUT 0x0
-#define OUTPUT 0x1
-#define INPUT_PULLUP 0x2
-#define INPUT_PULLDOWN 0x3
+/* Official Arduino */
+#define INPUT			    0x0
+#define OUTPUT              0x1
+#define INPUT_PULLUP        0x2
+/* STM32 extension */
+#define INPUT_FLOATING      INPUT
+#define INPUT_PULLDOWN      0x3
+#define INPUT_ANALOG        0x4
+#define OUTPUT_OPEN_DRAIN   0x5
 
 #define PI 3.1415926535897932384626433832795
 #define HALF_PI 1.5707963267948966192313216916398
@@ -64,11 +66,11 @@ enum BitOrder {
 	MSBFIRST = 1
 };
 
-//      LOW 0
-//      HIGH 1
-#define CHANGE 2
-#define FALLING 3
-#define RISING 4
+#define LOW     0x0
+#define HIGH    0x1
+#define CHANGE  0x2
+#define FALLING 0x3
+#define RISING  0x4
 
 #define DEFAULT 1
 #define EXTERNAL 0

Diff for: cores/arduino/wiring_digital.c

@@ -48,7 +48,7 @@ void pinMode(uint32_t ulPin, uint32_t ulMode)
     }
 
     switch (ulMode) {
-      case INPUT:
+      case INPUT: /* INPUT_FLOATING */
         pin_function(p, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
         break;
       case INPUT_PULLUP:
@@ -57,10 +57,17 @@ void pinMode(uint32_t ulPin, uint32_t ulMode)
       case INPUT_PULLDOWN:
         pin_function(p, STM_PIN_DATA(STM_MODE_INPUT, GPIO_PULLDOWN, 0));
         break;
+      case INPUT_ANALOG:
+        pin_function(p, STM_PIN_DATA(STM_MODE_ANALOG, GPIO_NOPULL, 0));
+        break;
       case OUTPUT:
         pin_function(p, STM_PIN_DATA(STM_MODE_OUTPUT_PP, GPIO_NOPULL, 0));
         break;
+      case OUTPUT_OPEN_DRAIN:
+        pin_function(p, STM_PIN_DATA(STM_MODE_OUTPUT_OD, GPIO_NOPULL, 0));
+        break;
       default:
+        Error_Handler();
         break;
     }
     set_pin_configured(p, g_digPinConfigured);