Add support for Arduino Primo board

Author: chiararuggeri

Boards.h

@@ -299,6 +299,21 @@ writePort(port, value, bitmask):  Write an 8 bit port.
 #define PIN_TO_PWM(p)           PIN_TO_DIGITAL(p)
 #define PIN_TO_SERVO(p)         (p) // deprecated since v2.4
 
+// Arduino Primo
+#elif defined(ARDUINO_PRIMO)
+#define TOTAL_ANALOG_PINS       6
+#define TOTAL_PINS              22 //14 digital + 6 analog + 2 i2c
+#define VERSION_BLINK_PIN       LED_BUILTIN
+#define IS_PIN_DIGITAL(p)       ((p) >= 2 && (p) < 20)
+#define IS_PIN_ANALOG(p)        ((p) >= 14 && (p) < 20)
+#define IS_PIN_PWM(p)           digitalPinHasPWM(p)
+#define IS_PIN_SERVO(p)         (IS_PIN_DIGITAL(p) && (p) < MAX_SERVOS+2)
+#define IS_PIN_I2C(p)           ((p) == PIN_WIRE_SDA || (p) == PIN_WIRE_SCL) // SDA = 20, SCL = 21
+#define IS_PIN_SPI(p)           ((p) == SS || (p)== MOSI || (p) == MISO || (p == SCK)) // 10, 11, 12, 13
+#define PIN_TO_DIGITAL(p)       (p)
+#define PIN_TO_ANALOG(p)        ((p) - 14)
+#define PIN_TO_PWM(p)           PIN_TO_DIGITAL(p)
+#define PIN_TO_SERVO(p)         (p)
 
 // Arduino 101
 #elif defined(_VARIANT_ARDUINO_101_X_)