add nono-33-iot to Boards.h

Author: soundanalogous

Boards.h

@@ -261,6 +261,23 @@ writePort(port, value, bitmask):  Write an 8 bit port.
 #define PIN_TO_SERVO(p)         ((p) - 2)
 
 
+// Arduino Nano 33 IoT
+#elif defined(ARDUINO_SAMD_NANO_33_IOT)
+#define TOTAL_ANALOG_PINS       8
+#define TOTAL_PINS              22 // 14 Digital + 8 Analog
+#define IS_PIN_DIGITAL(p)       ((p) < TOTAL_PINS)
+#define IS_PIN_ANALOG(p)        ((p) > 13 && (p) < 14 + TOTAL_ANALOG_PINS)
+#define IS_PIN_PWM(p)           digitalPinHasPWM(p)
+#define IS_PIN_SERVO(p)         (IS_PIN_DIGITAL(p) && (p) < MAX_SERVOS) // deprecated since v2.4
+#define IS_PIN_I2C(p)           ((p) == PIN_WIRE_SDA || (p) == PIN_WIRE_SCL)
+#define IS_PIN_SPI(p)           ((p) == PIN_SPI_SS || (p) == PIN_SPI_MOSI || (p) == PIN_SPI_MISO || (p) == PIN_SPI_SCK)
+#define IS_PIN_SERIAL(p)        ((p) == PIN_SERIAL1_RX || (p) == PIN_SERIAL1_TX) //defined in variant.h  RX = 0 TX = 1
+#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) // deprecated since v2.4
+
+
 // Arduino/Genuino MKR1000 or MKR1010
 #elif defined(ARDUINO_SAMD_MKR1000)	|| defined(ARDUINO_SAMD_MKRWIFI1010)
 #define TOTAL_ANALOG_PINS       7